June 2012 Volume 1, Issue 3 Article #07

Size: px
Start display at page:

Download "June 2012 Volume 1, Issue 3 Article #07"

Transcription

1 Scholas Knowledge is Powe June 2012 Volume 1, Issue 3 Aticle #07 IJASETR Reseach Pape ISSN: Modeling of themal adiation in the intenal sections of a Thee-phase AC electical ac funace by means of a new tempeatue estimation method fo AC acs Abolfazl Nazai Depatment of Electical and Compute engineeing, Saveh banch, Islamic Azad Univesity, Saveh, Ian. * Coesponding autho s abolfazl.nazai@yahoo.com Abstact Wea and coosion has always had an advese effect on the pefomance and sevice life of electical ac funaces. Evey yea, lage amounts of money ae spent on eplacing the won out pats of these funaces which ae no longe usable because of coosion. One of the key causes of coosion in electical ac funaces is the themal adiation fom the acs. If the acs ae not popely coveed by slag, they will emit lage quantities of themal adiation into vaious intenal sections of the funace, which will lead to significant coosion in the wall and also the efactoy panels. The goal of this aticle is to estimate the amount of themal adiation which diffeent pats of the funace eceive fom the acs. In ode to calculate this heat, the tempeatue of the acs should be known. In this pape, a new method has been pesented fo the estimation of the AC ac tempeatues. The Bowman s model has been employed fo the simulation of the ac channel and the calculation of ac channel adius. The ac tempeatue has been estimated and used in a 3D themal adiation model; and the noted adiation model has been analyzed by linea Finite Element methods. Also, a linea method has been used fo the calculation of themal powe geneated by the acs. The biggest advantage of the poposed appoach is the simplification and eduction of complex calculations of themal and electomagnetic fields elated to the ac egion. The obtained esults show vey good coelation with the expeimental obsevations at the Isfahan Mobaakeh Steel Mills Complex. Keywods: AC acs, themal adiation, thee phase AC ac funace, and finite element methods. Citation: Nazai A. et al. (2012), Modeling of themal adiation in the intenal sections of a Thee-phase AC electical ac funace by means of a new tempeatue estimation method fo AC acs. IJASETR 1(3): p Received: Accepted: Nazai A. et al. This is an open access aticle distibuted unde the tems of the Ceative Common Attibution 3.0 License. 1. Intoduction The electical ac funaces ae one of the biggest consumes of electicity. They convet electical enegy to themal enegy by utilizing high cuent acs. The themal enegy which is poduced in the acs is vey concentated, has a lage volume density and geneates a high tempeatue in them. Due to the high tempeatue of the acs, a lage potion of the heat tansfe between the funace s intenal sections is conducted though adiation. Diect themal adiation fom the acs to the efactoy mateials and also funace oof and wall panels damages them seiously. In the best case scenaio, these themal adiations esult in mino coosions. In the wost case, if the coosion occus in sections close to the molten 60

2 mateial, the funace could be punctued and molten mateials could seep out of the funace; this situation will be quite dangeous. In the altenating cuent AC acs, the acs don t have a fixed tempeatue [1], and the dimensions of the acs ae constantly changing [2]. Theefoe, if the facto of time and geometical changes of the acs ae taken into account, the exact analysis of the poblem of themal adiation fom the acs to the intenal funace sections becomes vey complicated and difficult to implement. Most of the eseach activities on the subject of themal analysis of ac funaces have only focused on the issue of themal adiation fom the ac to the bath [3, 4, and 5]. The subject of themal adiation fom the ac to the oof and walls and fom the bath to the oof has attacted less attention fom the eseaches [6, 12]. In [12], the effect of themal adiation fom the ac and molten pool to the funace oof was expeimentally investigated, and it was detemined that thee is no diect themal adiation fom the acs onto the oof. In [6], the themal enegy poduced in the acs unde nominal conditions has been calculated and then it has been assumed that 80% of this enegy is eleased as adiant heat in the intenal sections of the funace. In that aticle, the ac channel adius and its epeated changes have not been mentioned at all. Moeove, the manne by which the tempeatue of AC acs vaies is not identified. The assumption of 80% of themal enegy poduction in the acs being tuned into themal adiation has also been consideed by [9]. This assumption has been deived fom the esults obtained in [3]. The electical ac funaces (both the AC and DC types) have small efficiencies; and most of the geneated enegy in the acs is wasted in the fom of themal adiation into the intenal funace egions (except the potion which is absobed by the molten mateials). This enegy is usually collected and emoved fom the funace by the cooling wate lines that have been installed in the walls and oof. 2. Ac channel adius In this wok, the ac is modeled by the Bowman method as emanating fom a elatively small attachment aea on the gaphite electode in positive polaity mode and extends down to the suface of the molten bath. Eq. (1) descibes the shape of the conducting volume of the ac as a function of the distance fom the cathode attachment spot. An axisymmetic ac and no inteaction effects at the anode ae assumed, a k z exp( ) (1) 5 k In Eq. (1), the ac adius a, vaies with the distance z, measued fom the lowe suface of electode. The adius k is the cathode-spot attachment and is detemined by the instantaneous ac cuent. In Bowman model, cuent density in ac s A spot is appoximately constant ( J C 3500 [7]) and fo any defined cuent I in the electode, cm 2 k is: k I. (2) J C In each coss section of ac, ac s adius calculates fom Eq. (1). 61

3 Figue.1 shows these geometical dimensions. An AC ac in a positive polaity mode with positive cuent value at a time instant is vey simila to a DC ac with equal cuent. The shapes of the acs in AC electic ac funaces depend on the ac cuent and in addition ae vey sensitive to changes of imposed instantaneous voltage on seconday of the funace tansfome which causes the adius of the cathode-spot attachment to be changed. In AC acs, the cathode and anode change epeatedly in one cycle. In the positive mode the electode is the cathode and uppe suface of the molten metal bath is the anode and in the negative half polaity, this case is evesed. In the positive polaity mode, the ac ignition and the emission of electons take place at the lowest point of electode tip. In the negative polaity mode, ac initiation takes place at the uppe suface of molten metal bath. Theefoe, the emission of electons fom this suface is a complex phenomenon so that we have a vey complicated unstable ac [2]. In AC acs, the cathode-spot changes in popotion to the instantaneous cuent accoding to Eq. (1). This phenomenon is moe obvious fo high instantaneous cuents than low cuents. The ac geomety depends on the instantaneous cuent. Theefoe, it can appoximately give a schematic diagam of ac shape vaiations acoss the AC peiod fo an instantaneous polaity situation and fo ac geomety. Fig. 1: Bowman model fo DC ac Figue.2 depicts the instantaneous geomety of an abitay AC ac fo one peiod of AC cuent vaiations. As seen in Figue.2, the geomety of an AC ac depends on the value of instantaneous cuent. Change of cathode and anode can clealy be ealized in Figue.2. In any time, the smallest coss section of the cone is fo the cathode and the biggest coss section of the cone is fo the anode aea. Fig. 2: Schematic diagam of an abitay ac in a peiod of cuent wavefom [2] 62

4 The peceding discussion concludes that a pefect model of an AC ac, consideing its instantaneous geomety, would be vey complex to model in 3-D FEM. Theefoe analyzing such a model using the finite element method is complicated. In addition, a thee dimensional model, incopoating movable pats, should be simulated using tansient elements. Theefoe, it is useful to use a simple method fo the geomety of the ac. In this model, the movement of the ac is neglected. The AC ac is assumed to be a cylindical conducto with a time independent tempeatue. This model is simila to a DC channel ac model. If the existing hamonics in the ac cuent ae disegaded and the ac cuent is consideed as a completely sinusoidal one (elation (3)), then the ac will have, at evey height, a peiodic adius that vaies with time; and this adius will follow elation (4). I ac ( t) I sin(2 t / T) (3) m Since in the altenating-cuent (AC) acs, the diection of cuent changes at evey half-cycle, the cathode is displaced as well. Theefoe, elation (4) will have two sepaate pats coesponding to the two half-cycles. ( t, z) a z [ exp( 5 k, )] max ( h z) [ exp( )] 5 k, max ( k, ) max ( ) k, max 2 t T sin ( ) fo 0 t (4) T 2 2 t sin ( ) T fo T t T 2 k,max is the lagest possible adius of the cathode spot duing a peiod, and it is defined by elation (5): k max I m, (5) J C As is clea fom elation (4), the AC ac channel s coss section, at evey ac height, depends on z (distance fom the electode tip) and time. Thus, the tansient analysis of the themal adiation model is vey complex. The exact analysis of the tansient finite element will equie momentay values fo volume, mesh size and loading. In this eseach wok, steady state analysis has been caied out by using constant dimensions fo the ac and by consideing constant loading conditions. In this method, the ac channel adius has been calculated by aveaging the z and the time values ove the ac length and a time cycle, espectively. Relation (6) shows how the aveage adius of the ac channel is calculated. 0 h T 1 k,max h a ( z, t) dt dz ( ) 6.4h 22 k,max.[exp( ) 1] Th h k,max Accoding to elation (6), the aveage adius of the AC ac only depends on the ac length and the peak of the sinusoidal cuent. The obtained esults fo 0 vesus the ac length and diffeent cuents (in RMS values) have been shown in Fig. 3. (6) 63

5 Having pefomed pecise measuements on electical acs, kohl was able to pesent a simple and linea model fo the AC electical acs. In his poposed model, ac esistance depends on ac length only and is expessed by elation (7). R ( 11.5h 0.1) m (7) In this elation, h denotes the ac length. Thus, by knowing the esistance and measuing the ac cuent, the themal powe poduced in the AC electical acs can be easily calculated. 3. Tempeatue distibution in the ac The objective of this section is to detemine the manne of tempeatue distibution ove the ac channel. In this section, it has been assumed that 80% of the geneated themal enegy in the acs is dispesed in the funace though adiation [3, 6, and 9]. The heat poduced in the acs has been estimated by the Kohl s linea model. Tempeatue at evey ac point has been consideed as a function of the distance of that point fom the ac channel axis. In this aticle, it has been assumed that the ac tempeatue has an exponential distibution with espect to the adial distance fom the ac channel axis. This assumption has been made based on the esults obtained in aticles cited in [1, 3, 4, 5, and 10]. Relation (8) shows this tempeatue distibution (in Kelvin). T( ) k e 2 k 10000, 0 (8) If the ac channel is assumed as a set of concentic cylindes having the same length and with adiuses smalle than 0, then the emitted themal adiation by each of these cylindes can be calculated fom elation (9) ( Q j is the emitted themal adiation by the j th cylinde with adius j ). Q j 4 T ( )(2 h) (9) j j The total amount of themal adiation fom the ac to the intenal funace sections will be equal to the sum of themal enegies emitted by this cylinde set. Thus, we will have: ( Q ad 4 T ( )(2 h) d 2 h T 0 0 Q ad denotes the total adiated enegy fom the ac) ( ) d (10) As was peviously mentioned, it has been assumed that 80% of the poduced themal enegy in the acs is diffused in the funace as themal adiation. Theefoe, the main equation that elates the electical field to the themal field will be expessed as follows: ( Pac poduced by the electic field in the ac). Q 0. 8 ad P ac indicates the themal powe (11) 64

6 Qad will be calculated by elation (10) and Pac by the Kohl s elation. In ode to detemine the exponential distibution T(R), coefficients α and K should be known. Fo this pupose, besides using elation (11), the following bounday condition is also consideed. T( ) K (12) The pesented bounday condition in elation (12) indicates that the ac zone has been confined to a egion with tempeatues highe than degees Kelvin [1, 3, 4, 5, and 10]. Thus, coefficients α and K fo diffeent ac lengths and cuents ae calculated accoding to Figues (4) and (5), espectively. By having α and K coefficients, the tempeatue distibution ove the ac channel shall be detemined. The tempeatue distibution with espect to the adial distance fom the ac channel axis and fo diffeent cuents (in RMS values) has been shown in Fig. 6 fo a 30 cm AC ac. Fig. 4: k fo diffeent ac cuents (in RMS) in tem of ac length Fig. 5: fo diffeent ac cuents (in RMS) in tem of ac length 65

7 Fig.6: ac tempeatue distibutions in tem of adial distance fom ac axis (Ac length is 30cm) fo diffeent cuents 4. Themal adiation modeling The tempeatue of the adiating souce is the most impotant paamete in detemining the amount of themal adiation. Highe tempeatues poduce moe intense themal adiation fluxes. The themal adiation inside the electical ac funaces includes the themal adiation fom the acs and the eflected adiation by the oof and wall panels and by the molten mateial pool. The acs have high enegy volume density and theefoe thei tempeatue will be vey high. The volume density of the enegy poduced in the ac is diectly elated to the ac length and cuent. The themal adiation fom the acs can take thee outes inside the funace to get to the thee final destinations of wall, oof and molten mateials. Evey point on these thee outes will eceive a potion of the adiated enegy accoding to the point s distance fom the acs and also the view facto the point makes with the ac channels. The lagest amount of adiated enegy fom the acs gets to the molten mateials, because fist of all, the distance between them is vey shot and second, thee exists a good view facto between the acs and the pool of molten mateials. Themal adiation fom the acs to the walls and oof is pat of the enegy tansfe system s losses, and it diminishes the efficiency of the electical ac funaces. If the acs ae well coveed by slag, these losses will be educed. The amount of themal adiation fom the acs to the wall panels is much moe than that fom the acs to the oof. 5. Finite element modeling In ode to calculate the amount of themal adiation which is tansfeed fom the acs to diffeent inteio sections of the funace, a thee-dimensional model of a eal ac funace has been simulated in the ANSYS12.0 softwae. This funace, which is being used in the Isfahan Mobaakeh Steel Mills, is a 3-phase funace with the capacity of 200 tons. The simulated model includes the acs, oof and wall panels, molten pool and the efactoy. The mesh configuation of this funace has been shown in Fig. 7. Also, funace dimensions and physical specifications of diffeent sections of the funace, which have been used in the simulation, ae listed in Table (1). The 3D linea finite element analyses have been pefomed fo the steady state. The ac tempeatues have been detemined and used in the simulation accoding to the 66

8 appoaches pesented in the pevious sections. Also, the ac channel adius has been obtained by elation (6). It has been assumed that all of the mateials inside the pool ae molten and thei tempeatue is about 1800 degees Kelvin. Fo the pupose of isolating the simulation envionment fom the suounding space, a convection cuent with the tempeatue of 330 degees Kelvin has been consideed. All the inteio sufaces of the funace have been consideed as themal adiating sufaces with diffeent adiation coefficients. The geneal expessions of adiation heat tansfe using gay bodies diffuse adiation theoy fo an enclosed system of seveal adiating sufaces ae used [11]. The Radiation Matix Geneato is used to geneate a matix of view factos among adiating sufaces. This matix is theeafte ead as a supe element. In the inne egion of the funace only the themal tansfe by adiation has been consideed. Nomally duing the melting pocess, a majo pat of the efactoy mateials emains unde the molten mateials and anothe pat of it is coveed by the slag. When the slag has a small height o when thee is no slag at all, the themal adiation fom the ac to the efactoy intensifies and it will damage the efactoy mateials. Fig. 8 shows a tansvese view of tempeatue distibution in the funace bottom efactoy unde the nomal opeating conditions. Unde nomal woking conditions, the acs ae completely coveed by efactoy mateials (the height of the slag is about 50 cm). As can be seen in this Figue, the efactoy bicks which ae in the uppe sections (due to being next to the molten mateials) expeience a highe tempeatue. Table.1 Dimension and physical popety in the finite element modeling of AC thee-phase ac funace Input powe 68Mwatts Nominal phase cuent 80KA Appoximate dimension 4.5m 7.5m 8m Emissivity of ac 1 Emissivity of oof and wall 0.4 Emissivity of bath suface 0.6 Steel bath tempeatue 1800K Slag laye depth 0 and 0.5m Ac Length 30cm Fig. 9-a illustates tempeatue distibution in the efactoy fo when thee is no slag at all. In such a case, themal adiation fom the acs ceates thee hot zones on the efactoy mateials. The simulations show that when one of the acs gets close to the funace wall, the tempeatue of the closest hot egion to that ac inceases significantly, and this will lead to coosion in that hot egion. These cases occu when the ac banches out o when, because of the malfunction of the contol system, the ac deviates towad the funace wall. Since a long time ago, in the Mobaakeh Steel Mills, highe quality efactoy bicks (elative to the othe funace sections) have been installed in the thee noted hot zones. 67

9 Fig.7: meshing of thee-phase AC ac funace Fig.8: tempeatue distibution in the funace bottom efactoy unde the nomal opeating conditions (in Kelvin) The expeimental findings fom the field validate the simulation esults quite well. The tempeatue distibution in the wall panels fo the case in which the acs ae totally coveed by slag has been shown in Fig. 9-b. Because the lowe pats of the wall ae close to the acs, they will expeience highe tempeatues. Diect themal adiation fom the acs (when the slag height is zeo) causes seious damage to the wall panels. The effect of this diect themal adiation on the wall panels has been demonstated in Fig. 10-a. The tempeatue has dastically inceased in this Figue as compaed to Fig. 9-b. Fig.9: a) Tempeatue distibution in the efactoy fo when thee is no slag at all (in Kelvin) b) Tempeatue distibution in the wall panels fo the case in which the acs ae totally coveed by slag (in Kelvin) Fig. 10-b shows the tempeatue distibution in the exteio sufaces of the funace fo the case in which thee is no slag at all. Tempeatue in this case also inceases in the exteio egions of the funace; and those exteio sections that ae 68

10 located whee the funace nose joins the funace wall will expeience a highe tempeatue incease. The themal adiation fom the acs has no effect on the tempeatue of funace oof [12]. The eflected adiation fom the molten mateial pool aises the tempeatue of the acs. The funace oof has an almost adial tempeatue distibution patten, and its cental egions have highe tempeatues. The tempeatue distibution on the oof has been illustated in Fig. 11. Fig.10:a) Tempeatue distibution in the wall panels fo when thee is no slag at all (in Kelvin) b) Tempeatue distibution in the exteio sufaces of the funace fo the case in which thee is no slag at all (in Kelvin) 6. Conclusion Fig. 11: tempeatue in the oof (in Kelvin) In this aticle, a linea electical model has been used fo the AC acs. A new method has been poposed fo the calculation of the ac channel adius and tempeatue distibution on the ac channel. 3D finite element methods have been employed fo the estimation of themal adiation eceived by diffeent pats of the funace. In the 3D simulation, the eal 69

11 dimensions of a 200-ton funace, including the acs, bath, efactoy panels and also wall and oof panels, have been used. In this model, the acs act as the souces of themal adiation; and the themal adiation fom the ac is eceived by the wall panels and by the bath and efactoy. The themal adiation fom the acs to the efactoy unde the no-slag conditions ceates thee hot egions on the efactoy. The hot zones obtained in the simulations confomed to the damagepone egions of the efactoy panels that had been discoveed in the Mobaakeh steel mills funaces. Since a long time ago, these egions ae being coveed with highe quality bicks compaed to the othe funace sections. Pats of the wall panels that ae next to the acs always expeience highe tempeatues. The themal adiation fom the acs to the oof has no effect on the oof tempeatue (due to ineffective view facto and long distance between the acs and the oof). This pape pesents a simple and accuate calculation method fo the analysis of themal adiation in the inteio sections of altenating-cuent (AC) electical ac funaces. In this appoach, by having the ac length and cuent, the ac channel adius and tempeatue ae easily detemined. Using the acs with known tempeatues in a 3D finite element analysis, the amount of themal adiation fom the acs to diffeent intenal sections of the ac funace can be obtained. Refeences [1] J.A.Bakken, L. Lasen, and V.G.Sevastyanenko, Numeical modeling of electic acs, Jounal of Engineeing Physics and Themophysics, Vol. 70, No. 4, [2] A.Kiyoumasi, A.Nazai, M.Ataei, H. K.Beheshti, and R, Hoshnand, Electomagnetic analysis of an AC electic ac funace including the modeling of AC ac, Compel, Vol.29, No.3, pp , [3] J.Alexis, M.Ramiez, G.Tapaga, and P.Jonson, Modeling of a DC Ac Funace- Heat Tansfe fom the Ac, Ion steel Inst Jpn, Vol.40, No.11, pp , [4] F. Qian, B. Faouk, and R. Muthaasan, Modeling of fluid flow and heat tansfe in the plasma egion of the dc electic ac funace, Metallugical and Mateials Tansactions B, vol.26b, pp , Octobe [5] M. A. Ramiez, Mathematical modeling of DC electic ac funace opeations, Massachusetts Institute of Technology, Ph.D. Thesis, Septembe, [6] G. Diancai, and A. Ions, Modeling of adiation intensity in an EAF, thid intenational confeence on CFD in the mineal and pocess industies CSIRO, Melboune, Austalia, [7] R. T. Jones, Q. G. Reynolds, and M. J. Alpot, DC ac photogaphy and modeling, PERGAMON, Mineals Engineeing, Vol.15, pp , [8] P. P. Pavia, Modeling and contol of an electic ac funace, Maste Thesis, Depatment of Automatic Contol, Lund Institute of Technology, June [9] F. David, T. Tudoache, and V. Fitean, Numeical evaluation of electomagnetic field effects in electic ac funaces, Compel, Vol.20, pp , [10] M. Ramiez, and G.Tapaga, Mathematical modeling of a DC electic ac dimensionless epesentation of a DC ac, Ion steel Inst Jpn, Vol. 43, No.8, pp , [11] R. Siegal and J. R. Howell Themal Radiation Heat Tansfe,3 d ed, Hemisphee Publishing Copoation, Washington,DC, [12] Q. Reynolds, Themal adiation modeling of DC smelting funace feeboads, Mineals Engineeing, vol.15, pp ,

1 Performance and Cost

1 Performance and Cost Pefomance and Cost Analysis and Reseach of Ai-Cooled Using Small Diamete Coppe Tubes Wu Yang, Li Changsheng and Deng Bin Abstact Replacing coppe tubes with aluminum tubes and using coppe tubes with smalle

More information

Optimal Design of Smart Mobile Terminal Antennas for Wireless Communication and Computing Systems

Optimal Design of Smart Mobile Terminal Antennas for Wireless Communication and Computing Systems Optimal Design of Smat Mobile Teminal Antennas fo Wieless Communication and Computing Systems Autho Lu, Junwei, Yang, Shiyou Published 2007 Confeence Title 2007 4th Intenational Symposium on Electomagnetic

More information

DESIGN AND PARAMETRIC EVALUATION OF RECTANGULAR MICROSTRIP PATCH ANTENNA FOR GSM APPLICATION

DESIGN AND PARAMETRIC EVALUATION OF RECTANGULAR MICROSTRIP PATCH ANTENNA FOR GSM APPLICATION DESIGN AND PARAMETRIC EVALUATION OF RECTANGULAR MICROSTRIP PATCH ANTENNA FOR GSM APPLICATION RAHUL T. DAHATONDE, SHANKAR B. DEOSARKAR Dept. of E & TC, D. Babasaheb Ambedka Technological Univesity, Lonee,

More information

Figure Geometry for Computing the Antenna Parameters.

Figure Geometry for Computing the Antenna Parameters. Spheical Coodinate Systems Definitions Figue 1.2.1 Geomety fo Computing the Antenna Paametes. Antenna Radiation Patten: The distibution of adiated enegy fom an antenna ove a suface of constant adius centeed

More information

Development of Corona Ozonizer Using High Voltage Controlling of Produce Ozone Gas for Cleaning in Cage

Development of Corona Ozonizer Using High Voltage Controlling of Produce Ozone Gas for Cleaning in Cage Moden Envionmental Science and Engineeing (ISSN 333-58) July 07, Volume 3, No. 7, pp. 505-509 Doi: 0.534/mese(333-58)/07.03.07/0 Academic Sta Publishing Company, 07 www.academicsta.us Development of Coona

More information

Investigation and Analysis of Inception Voltage and Field Distribution in Power Cables with Internal Cavities in Dielectric

Investigation and Analysis of Inception Voltage and Field Distribution in Power Cables with Internal Cavities in Dielectric Investigation and Analysis of Inception Voltage and Field Distibution in Powe Cables with Intenal Cavities in Dielectic A. A. Hossam-Eldin Electical Eng. Depatment Faculty of Engineeing Alexandia Univesity,

More information

Proposal of Circuit Breaker Type Disconnector for Surge Protective Device

Proposal of Circuit Breaker Type Disconnector for Surge Protective Device Poposal of Cicuit Beake Type Disconnecto fo Suge Potective Device MASAO SHIBAYAMA, HITOSHI KIJIMA Polytechnic Univesity 2-32-1 Ogawanishi, Kodaia, Tokyo, 187-0035 JAPAN hkijima@uitec.ac.jp Abstact: - A

More information

Optic Cable Tracking and Positioning Method Based on Distributed Optical Fiber Vibration Sensing

Optic Cable Tracking and Positioning Method Based on Distributed Optical Fiber Vibration Sensing 08 5th Intenational Confeence on Electical & Electonics Engineeing and Compute Science (ICEEECS 08) Optic Cable Tacking and Positioning Method Based on Distibuted Optical Fibe Vibation Sensing Zhang Chao,

More information

Parameters of spinning AM reticles

Parameters of spinning AM reticles Paametes of spinning AM eticles onald G. Digges, Cal E. Halfod, and Glenn D. Boeman A new method of obtaining amplitude modulation (AM) fo detemining taget location with spinning eticles is pesented. The

More information

Performance Analysis of Z-Source Inverter Considering Inductor Resistance

Performance Analysis of Z-Source Inverter Considering Inductor Resistance Pefomance Analysis of Z-Souce Invete Consideing Inducto Resistance Fatma A. Khea * and Essam Eddin M. Rashad ** Electic Powe and Machines Engineeing Depatment, Faculty of Engineeing, anta Univesity, anta,

More information

School of Electrical and Computer Engineering, Cornell University. ECE 303: Electromagnetic Fields and Waves. Fall 2007

School of Electrical and Computer Engineering, Cornell University. ECE 303: Electromagnetic Fields and Waves. Fall 2007 School of Electical and Compute Engineeing, Conell Univesity ECE 303: Electomagnetic Fields and Waves Fall 007 Homewok 1 Due on Nov. 8, 007 by 5:00 PM Reading Assignments: i) Review the lectue notes. ii)

More information

N2-1. The Voltage Source. V = ε ri. The Current Source

N2-1. The Voltage Source. V = ε ri. The Current Source DC Cicuit nalysis The simplest cicuits to undestand and analyze ae those that cay diect cuent (DC). n this note we continue ou study of DC cicuits with the topics of DC voltage and cuent souces, the idea

More information

An Efficient Control Approach for DC-DC Buck-Boost Converter

An Efficient Control Approach for DC-DC Buck-Boost Converter 2016 Published in 4th Intenational Symposium on Innovative Technologies in Engineeing and Science 3-5 Novembe 2016 (ISITES2016 Alanya/Antalya - Tukey) An Efficient Contol Appoach fo DC-DC Buck-Boost Convete

More information

Microwave Finite Element Modeling Applications to Coupled Electromagnetic-Thermal Problems and Characterization of Dielectric Materials

Microwave Finite Element Modeling Applications to Coupled Electromagnetic-Thermal Problems and Characterization of Dielectric Materials Micowave Finite Element Modeling Applications to Coupled Electomagnetic-Themal Poblems and Chaacteization of Dielectic Mateials Hulusi Acikgoz, Yann Le Bihan, Olivie Meye, and Lionel Pichon Laboatoie de

More information

Analysis of the optimized low-nonlinearity lateral effect sensing detector

Analysis of the optimized low-nonlinearity lateral effect sensing detector Jounal of hysics: Confeence Seies Analysis of the optimized low-nonlineaity lateal effect sensing detecto To cite this aticle: Saeed Olyaee et al J. hys.: Conf. Se. 76 4 Related content - Neual netwok

More information

THE UNIVERSITY OF NEW SOUTH WALES. School of Electrical Engineering & Telecommunications

THE UNIVERSITY OF NEW SOUTH WALES. School of Electrical Engineering & Telecommunications THE UNIESITY OF NEW SOUTH WAES School of Electical Engineeing & Telecommunications EE97 POWE EETONIS FO ENEWABE AND DISTIBUTED GENEATION EXAMINATION Session (Supplementay Exam) TIME AOWED: 3 hous TOTA

More information

Chamber Influence Estimation for Radiated Emission Testing in the Frequency Range of 1 GHz to 18 GHz

Chamber Influence Estimation for Radiated Emission Testing in the Frequency Range of 1 GHz to 18 GHz Chambe Influence Estimation fo Radiated Emission Testing in the Fequency Range of 1 GHz to 18 GHz Alexande Kiz Electomagnetic Compatibility and RF-Engineeing ARC eibesdof eseach GmbH eibesdof, Austia alexande.kiz@acs.ac.at

More information

Sliding Mode Control for Half-Wave Zero Current Switching Quasi-Resonant Buck Converter

Sliding Mode Control for Half-Wave Zero Current Switching Quasi-Resonant Buck Converter Sliding Mode Contol fo Half-Wave Zeo Cuent Switching Quasi-Resonant Buck Convete M. Ahmed, Student membe, IEEE, M. Kuisma, P. Silventoinen Abstact This pape focuses on the pactical implementation of sliding

More information

Antenna fundamentals: With answers to questions and problems (See also Chapter 9 in the textbook.)

Antenna fundamentals: With answers to questions and problems (See also Chapter 9 in the textbook.) adio Technology Metopolia/A. Koivumäki Antenna fundamentals: With answes to questions and poblems (See also Chapte 9 in the textbook.) 1. a) Make up a definition fo the tem "antenna". Answe: One definition:

More information

Experimental Investigation of Influence on Non-destructive Testing by Form of Eddy Current Sensor Probe

Experimental Investigation of Influence on Non-destructive Testing by Form of Eddy Current Sensor Probe Expeimental Investigation of Influence on Non-destuctive Testing by Fom of Eddy Cuent Senso Pobe Fengyun Xie * and Jihui Zhou School of Mechanical and Electonical Engineeing, East China Jiaotong Univesity,

More information

Design of an LLC Resonant Converter Using Genetic Algorithm

Design of an LLC Resonant Converter Using Genetic Algorithm Design of an LLC Resonant Convete Using Genetic Algoithm H. H. Nien, C. K. Huang, S. K. Changchien, C. H Chan Dept. of Electical Engineeing, Chienkuo Technology Univesity E-mail: nien@ctu.edu.tw Dept,

More information

Design of A Circularly Polarized E-shaped Patch Antenna with Enhanced Bandwidth for 2.4 GHz WLAN Applications

Design of A Circularly Polarized E-shaped Patch Antenna with Enhanced Bandwidth for 2.4 GHz WLAN Applications VNU Jounal of Science: Comp. Science & Com. Eng., Vol. 31, No. 2 (2015) 1-7 Design of A Ciculaly Polaized E-shaped Patch Antenna with Enhanced Bandwidth fo 2.4 GHz WLAN Applications Hong Van Tam 1, Luong

More information

Analysis of a Fractal Microstrip Patch Antenna

Analysis of a Fractal Microstrip Patch Antenna 124 Analysis of a Factal Micostip Patch Antenna Vibha Rani Gupta and Nisha Gupta* Bila Institute of Technology, Mesa, Ranchi-835215, Jhakhand, India. vgupta@bitmesa.ac.in, ngupta@bitmesa.ac.in Abstact-

More information

where and are polynomials with real coefficients and of degrees m and n, respectively. Assume that and have no zero on axis.

where and are polynomials with real coefficients and of degrees m and n, respectively. Assume that and have no zero on axis. function whee is an unknown constant epesents fo the un-modeled dynamics The pape investigates the position contol of electical moto dives that can be configued as stuctue of Fig 1 This poblem is fomulated

More information

Digital Simulation of FM-ZCS-Quasi Resonant Converter Fed DD Servo Drive Using Matlab Simulink

Digital Simulation of FM-ZCS-Quasi Resonant Converter Fed DD Servo Drive Using Matlab Simulink SERBIAN JOURNAL OF ELECTRICAL ENGINEERING Vol. 6, No. 2, Novembe 2009, 227-237 UDK: 621.314.1:621.376 Digital Simulation of FM-ZCS-Quasi Resonant Convete Fed DD Sevo Dive Using Matlab Simulink Kattamui

More information

Design of FIR Filter using Filter Response Masking Technique

Design of FIR Filter using Filter Response Masking Technique Design of FIR Filte using Filte Response Masking Technique Sandeep Shivastava, Alok Jain, Ram Kuma Soni Abstact- In this pape autho is tying to implement Fequency esponse masking (FRM) technique. In this

More information

Journal of Applied Science and Agriculture

Journal of Applied Science and Agriculture Jounal of Applied Science and Agicultue, 9(16) Octobe 214, Pages: 1-15 AENSI Jounals Jounal of Applied Science and Agicultue ISSN 1816-9112 Jounal home page: www.aensiweb.com/jasa A Design of New Bluetooth

More information

A. Ebadi*, M. Mirzaie* and S. A. Gholamian*

A. Ebadi*, M. Mirzaie* and S. A. Gholamian* A Compaison Between Electical Cicuit and Finite Element Modeling Methods fo Pefomance Analysis of a Thee-Phase nduction Moto unde oltage Unbalance A. Ebadi*, M. Mizaie* and S. A. Gholamian* Abstact: nduction

More information

Determination of The Winding Inductances Of A Two-Phase Machine.

Determination of The Winding Inductances Of A Two-Phase Machine. IOSR Jounal of Engineeing (IOSRJEN) ISSN (e): 5-31, ISSN (p): 78-8719 Vol. 5, Issue 4 (Apil. 15), V1 PP 16- www.iosjen.og Detemination of The Winding Inductances Of A Two-Phase Machine. * I.K. Onwuka,

More information

UNCERTAINTY ESTIMATION OF SIZE-OF-SOURCE EFFECT MEASUREMENT FOR 650 NM RADIATION THERMOMETERS

UNCERTAINTY ESTIMATION OF SIZE-OF-SOURCE EFFECT MEASUREMENT FOR 650 NM RADIATION THERMOMETERS XIX IMEKO Wold Congess Fundamental and Applied Metology Septembe 6 11, 29, Lisbon, Potugal UNCERTAINTY ESTIMATION OF SIZE-OF-SOURCE EFFECT MEASUREMENT FOR 65 NM RADIATION THERMOMETERS Fumihio Sakuma, Laina

More information

GAMMA SHAPED MONOPOLE PATCH ANTENNA FOR TABLET PC

GAMMA SHAPED MONOPOLE PATCH ANTENNA FOR TABLET PC GAMMA SHAPED MONOPOLE PATCH ANTENNA FOR TABLET PC Islam Md. Rafiqul, Mohammad Shawkat Habib and Khaizuan Abdullah Depatment of Electical and Compute Engineeing, Intenational Islamic Univesity Malaysia,

More information

51. IWK Internationales Wissenschaftliches Kolloquium International Scientific Colloquium

51. IWK Internationales Wissenschaftliches Kolloquium International Scientific Colloquium 51. IWK Intenationales Wissenschaftliches Kolloquium Intenational Scientific Colloquium PROCEEDINGS 11-15 Septembe 26 FACULTY OF ELECTRICAL ENGINEERING AND INFORMATION SCIENCE INFORMATION TECHNOLOGY AND

More information

Published in: International Journal of Material Forming. Document Version: Peer reviewed version

Published in: International Journal of Material Forming. Document Version: Peer reviewed version A Vitual Inspection Technique fo Assessing the Dimensional Accuacy of Foged Compesso Blades Using FE Modeling and CMM Inspection Makem, J., Ou, H., Amstong, C., Rennie, A., & Nikov, S. (2008). A Vitual

More information

Hexagonal Shaped Microstrip Patch Antenna for Satellite and Military Applications

Hexagonal Shaped Microstrip Patch Antenna for Satellite and Military Applications Intenational Jounal of Engineeing and Advanced Technology (IJEAT) ISSN: 49 8958, Volume-7 Issue-5, June 08 Hexagonal Shaped Micostip Patch Antenna fo Satellite and Militay Applications Jayaenjini N, Unni

More information

Wireless Communication (Subject Code: 7EC3)

Wireless Communication (Subject Code: 7EC3) COMPUCOM INSTITUTE OF TECHNOLOGY & MANAGEMENT, JAIPUR (DEPARTMENT OF ELECTRONICS & COMMUNICATION) Notes Wieless Communication (Subject Code: 7EC3) Pepaed By: LOKESH KUMAR ARYA Class: B. Tech. IV Yea, VII

More information

Efficient Power Control for Broadcast in Wireless Communication Systems

Efficient Power Control for Broadcast in Wireless Communication Systems Efficient Powe Contol fo Boadcast in Wieless Communication Systems A. T. Chonopoulos Compute Science Depatment Univesity of Texas at San Antonio San Antonio, TX Email:atc@cs.utsa.edu P. Cotae Depatment

More information

Multiagent Reinforcement Learning Dynamic Spectrum Access in Cognitive Radios

Multiagent Reinforcement Learning Dynamic Spectrum Access in Cognitive Radios Sensos & Tansduces 204 by IFSA Publishing, S L http://wwwsensospotalcom Multiagent Reinfocement Leaning Dynamic Spectum Access in Cognitive Radios Wu Chun, 2 Yin Mingyong, 2 Ma Shaoliang, Jiang Hong School

More information

ScienceDirect. Simplified Generation of Electromagnetic Field within EMC Immunity Test Area

ScienceDirect. Simplified Generation of Electromagnetic Field within EMC Immunity Test Area Available online at www.sciencediect.com ScienceDiect Pocedia Engineeing 69 ( 014 ) 7 34 4th DAAAM Intenational Symposium on Intelligent Manufactuing and Automation, 013 Simplified Geneation of Electomagnetic

More information

Feasibility of a triple mode, low SAR material coated antenna for mobile handsets

Feasibility of a triple mode, low SAR material coated antenna for mobile handsets Loughboough Univesity Institutional Repositoy Feasibility of a tiple mode, low SAR mateial coated antenna fo mobile handsets This item was submitted to Loughboough Univesity's Institutional Repositoy by

More information

Analysis of the Radiation Resistance and Gain of Full-Wave Dipole Antenna for Different Feeding Design

Analysis of the Radiation Resistance and Gain of Full-Wave Dipole Antenna for Different Feeding Design Jounal of lectomagnetic Analysis and Applications, 01, 4, 35-4 http://dx.doi.og/10.436/jemaa.01.46033 Published Online June 01 (http://www.scirp.og/jounal/jemaa) 35 Analysis of the Radiation Resistance

More information

Noise Attenuation Due to Vegetation

Noise Attenuation Due to Vegetation Noise Attenuation Due to Vegetation Vasile BACRIA Politehnica Univesity of Timisoaa, Bd. M.Viteazu,1, 300222 Timisoaa, bacia@mec.upt.o Nicolae HERISANU Politehnica Univesity of Timisoaa, Bd. M. Viteazu,

More information

Closed Loop Controlled LLC Half Bridge Isolated Series Resonant Converter

Closed Loop Controlled LLC Half Bridge Isolated Series Resonant Converter Closed Loop Contolled LLC Half Bidge Isolated Seies Resonant Convete Sivachidambaanathan.V and S. S. Dash Abstact LLC seies esonant convete is the most suitable convete fo medium powe applications due

More information

The Periodic Ambiguity Function Its Validity and Value

The Periodic Ambiguity Function Its Validity and Value The Peiodic Ambiguity Function Its Validity and Value Nadav Levanon Dept. of Electical Engineeing Systems Tel Aviv Univesity Tel Aviv, Isael nadav@eng.tau.ac.il Abstact The peiodic ambiguity function (PAF)

More information

INVESTIGATION OF CLOSE-TO-WALL WIRELESS SENSOR DEPLOYMENT USING 2D FINITE-DIFFERENCE TIME-DOMAIN MODELLING. Y. Wu and I. J.

INVESTIGATION OF CLOSE-TO-WALL WIRELESS SENSOR DEPLOYMENT USING 2D FINITE-DIFFERENCE TIME-DOMAIN MODELLING. Y. Wu and I. J. 2 nd Intenational Confeence on Wieless Communications in Undegound and Confined Aeas August 25-27, 2008 Val-d O - Québec - Canada INVESTIGATION OF CLOSE-TO-WALL WIRELESS SENSOR DEPLOYMENT USING 2D FINITE-DIFFERENCE

More information

New Approach for Optimizing Control of Switched Reluctance Generator

New Approach for Optimizing Control of Switched Reluctance Generator New Appoach fo Optimizing Contol of Switched Reluctance Geneato R. Rebbah, A. Bentounsi and H. Benalla Abstact This pape pesents a new switching appoach that detemines the optimal contol of the Switched

More information

Diagnosis method of radiated emission from battery management system for electric vehicle

Diagnosis method of radiated emission from battery management system for electric vehicle Available online at www.sciencediect.com ScienceDiect Enegy Pocedia 88 (2016 ) 662 667 CUE2015-Applied Enegy Symposium and Summit 2015: Low cabon cities and uban enegy systems Diagnosis method of adiated

More information

A New Buck-Boost DC/DC Converter of High Efficiency by Soft Switching Technique

A New Buck-Boost DC/DC Converter of High Efficiency by Soft Switching Technique A New Buck-Boost D/D onvete of High Efficiency by Soft Switching Technique Dong-Kul Kwak, Seung-Ho Lee, and Do-Young Jung Pofessional Gaduate School of Disaste Pevention, Kangwon National Univesity, 45-711,

More information

Design and Characterization of Conformal Microstrip Antennas Integrated into 3D Orthogonal Woven Fabrics

Design and Characterization of Conformal Microstrip Antennas Integrated into 3D Orthogonal Woven Fabrics Design and Chaacteization of Confomal Micostip Antennas Integated into 3D Othogonal Woven Fabics Xin Wang 1, Lan Yao 1, Fujun Xu 2, Dongchun Zhou 1, Yiping Qiu 1 1 College of Textiles, Donghua Univesity,

More information

LAAS/GBAS Ground Reference Antenna With Enhanced Mitigation of Ground Multipath

LAAS/GBAS Ground Reference Antenna With Enhanced Mitigation of Ground Multipath LAAS/BAS ound Refeence Antenna With Enhanced Mitigation of ound Multipath Alfed R Lopez, BAE Systems BIORAPHY Alfed R Lopez is a Life Fellow of the IEEE He is a Hazeltine Fellow and Engineeing Fellow with

More information

ONE-WAY RADAR EQUATION / RF PROPAGATION

ONE-WAY RADAR EQUATION / RF PROPAGATION ONE-WAY RADAR EQUATION / RF PROPAGATION The one-way (tansmitte to eceive) ada equation is deived in this section. This equation is most commonly used in RWR o ESM type of applications. The following is

More information

Analysis and Design of a 1MHz LLC Resonant Converter with Coreless Transformer Driver

Analysis and Design of a 1MHz LLC Resonant Converter with Coreless Transformer Driver Analysis and Design of a MHz C Resonant Convete with Coeless Tansfome Dive Mingping Mao, Dimita Tchobanov, Dong i 3, Matin Maez.,Tongji Univesity, Siping Rd 39, 9 Shanghai -China., Faunhofe Institute of

More information

Antenna Miniaturization Based on Supperscattering Effect

Antenna Miniaturization Based on Supperscattering Effect 512 JING-JING YANG, MING HUANG, FU-CHUN MAO, JING SUN, ANTENNA MINIATURIZATION BASED ON SUPPERSCATTERING Antenna Miniatuiation Based on Suppescatteing Effect Jing-jing YANG, Ming HUANG, Fu-chun MAO, Jing

More information

Demosaicking using Adaptive Bilateral Filters

Demosaicking using Adaptive Bilateral Filters Demosaicking using Adaptive Bilateal Filtes Ekine Akuiyibo Timothy Atobatele EE 362, Winte 2006 0. Abstact Digital cameas sample the continuous spectum using an aay of colo filtes such that each pixel

More information

Electrical characterization of thin film ferroelectric capacitors

Electrical characterization of thin film ferroelectric capacitors 1 Electical chaacteization of thin film feoelectic capacitos M. P. J. Tiggelman, K. Reimann, M. Klee, D. Beelen, W. Keu, J. Schmitz, and R. J. E. Hueting Abstact Tunable capacitos can be used to facilitate

More information

Flexible PVDF comb transducers for excitation of axisymmetric guided waves in pipe

Flexible PVDF comb transducers for excitation of axisymmetric guided waves in pipe Sensos and Actuatos A 100 (2002) 18 23 Flexible PVDF comb tansduces fo excitation of axisymmetic guided waves in pipe Thomas R. Hay *, Joseph L. Rose ESM Depatment, Pennsylvania State Univesity, 212 EES

More information

Analysis of formulas to calculate the AC inductance of different configurations of nonmagnetic circular conductors

Analysis of formulas to calculate the AC inductance of different configurations of nonmagnetic circular conductors Analysis of fomulas to calculate the AC inductance of diffeent configuations of nonmagnetic cicula conductos Fancesca Capelli*, Jodi-Roge Riba** *Electical Engineeing Depatment, Univesitat Politècnica

More information

Analysis and Implementation of LLC Burst Mode for Light Load Efficiency Improvement

Analysis and Implementation of LLC Burst Mode for Light Load Efficiency Improvement Analysis and Implementation of LLC Bust Mode fo Light Load Efficiency Impovement Bin Wang, Xiaoni Xin, Stone Wu, Hongyang Wu, Jianping Ying Delta Powe Electonics Cente 238 Minxia Road, Caolu Industy Zone,

More information

Absolute calibration of null correctors using twin computer-generated holograms

Absolute calibration of null correctors using twin computer-generated holograms Absolute calibation of null coectos using twin compute-geneated hologams Poteep C.V. Mallik a, Rene Zehnde a, James H. Buge a, Alexande Poleshchuk b a College of Optical Sciences, The Univesity of Aizona,

More information

This article presents the

This article presents the A Ciculaly Polaized 6 GHz Micostip Antenna Hee is a mm-wave antenna suitable fo WLAN systems By V. A. Volkov, M. D. Panes Asco, and V. D. Koolkov and R. G. Shifman Resonance This aticle pesents the design

More information

Gas Tube Arresters. Certifications, Device Selection Purpose, Operation, Installation Part Number Construction, Part Marking. General Information

Gas Tube Arresters. Certifications, Device Selection Purpose, Operation, Installation Part Number Construction, Part Marking. General Information Gas Tube Aestes The Potection Poducts Goup of Wold Poducts Inc., specializing in potection poducts fo AC and DC cicuits, is poud to featue a full line of Gas Tube Aestes. Ceamic Gas Tube Aestes povide

More information

(2) The resonant inductor current i Lr can be defined as, II. PROPOSED CONVERTER

(2) The resonant inductor current i Lr can be defined as, II. PROPOSED CONVERTER A High Powe Density Soft Switching Bidiectional Convete Using Unified Resonant Cicuit Ratil H Ashique, Zainal Salam, Mohd Junaidi Abdul Aziz Depatment of Electical Engineeing, Univesity Technology Malaysia,

More information

Near-field Computation and. Uncertainty Estimation using Basic. Cylindrical-Spherical Formulae

Near-field Computation and. Uncertainty Estimation using Basic. Cylindrical-Spherical Formulae Nea-field Computation and Uncetainty Estimation using Basic Cylindical-Spheical Fomulae Poject... IEC 63 Subject... Basic Nea-Field Computation Document numbe... N/A Revision... 3 Autho... F.D. du Plessis

More information

TECHNICAL DATA. JIS (Japanese Industrial Standard) Screw Thread. Specifications

TECHNICAL DATA. JIS (Japanese Industrial Standard) Screw Thread. Specifications JIS (Japanese Industial Standad) Scew Thead Specifications TECNICAL DATA Note: Although these specifications ae based on JIS they also apply to and DIN s. Some comments added by Mayland Metics Coutesy

More information

Wall Compensation for Ultra Wideband Applications

Wall Compensation for Ultra Wideband Applications 64 A. MUQAIBEL, N. IYA, U. JOHAR, WALL COMPENSATION FOR ULTRA WIDEBAND APPLICATIONS Wall Compensation fo Ulta Wideband Applications Ali H. MUQAIBEL, Nuuddeen M. IYA, Uma M. JOHAR Dept. of Electical Engineeing,

More information

Current Compensation Techniques for Lowvoltage High-performance Current Mirror Circuits

Current Compensation Techniques for Lowvoltage High-performance Current Mirror Circuits Southen Illinois Univesity Cabondale OpenSIUC Aticles Depatment of Electical and Compute Engineeing 7-06 Cuent Compensation Techniques fo Lowvoltage High-pefomance Cuent Mio Cicuits Stefan Leitne Haibo

More information

Design of Microstrip Antenna for Wireless Local Area Network

Design of Microstrip Antenna for Wireless Local Area Network Available Online at www.ijcsmc.com Intenational Jounal of Compute Science and Mobile Computing A Monthly Jounal of Compute Science and Infomation Technology IJCSMC, Vol. 4, Issue. 4, Apil 205, pg.36 365

More information

Small Loop Antenna and Duality Theorem

Small Loop Antenna and Duality Theorem Small Loop Antenna and Duality Theoem Page 1 Small Loop Antenna and Duality Theoem Having studied the ideal electic dipole we now tun ou attention to an inteesting antenna closely elated to the electic

More information

Synopsis of Technical Report: Designing and Specifying Aspheres for Manufacturability By Jay Kumler

Synopsis of Technical Report: Designing and Specifying Aspheres for Manufacturability By Jay Kumler OPTI 51 Synopsis (Gad Requiement #1) G. Desoches Synopsis of Technical Repot: Designing and Specifying Asphees fo Manufactuability By Jay Kumle Novembe 1, 007 Reviewed by: Gead Desoches Abstact Since asphees

More information

cos s Presentation Layout HIGH ACCURACY REAL-TIME DAM MONITORING USING LOW COST GPS EQUIPMENT

cos s Presentation Layout HIGH ACCURACY REAL-TIME DAM MONITORING USING LOW COST GPS EQUIPMENT HIGH ACCURACY REAL-TIME DAM MONITORING USING LOW COST GPS EQUIPMENT Pesentation Layout GPS in Engineeing Monitoing. GPS Caie Phase Multipath Eo Multipath Sideeal-day Coection Technique Poposed Technique

More information

Comparison of winding topologies in a pot core rotating transformer Smeets, J.P.C.; Encica, L.; Lomonova, E.

Comparison of winding topologies in a pot core rotating transformer Smeets, J.P.C.; Encica, L.; Lomonova, E. Compaison of winding topologies in a pot coe otating tansfome Smeets, J.P.C.; Encica, L.; Lomonova, E. Published in: Poceedings of the 2 2th Intenational Confeence on Optimiation of Electical and Electonic

More information

Short-Circuit Fault Protection Strategy of Parallel Three-phase Inverters

Short-Circuit Fault Protection Strategy of Parallel Three-phase Inverters Shot-Cicuit Fault Potection Stategy of Paallel Thee-phase Invetes Hongliang Wang, Membe, IEEE, Xuejun Pei, Membe, IEEE, Yu Chen, Membe, IEEE,Yong Kang College of Electical and Electonics Engineeing Huazhong

More information

Space Leaky Waves Propagating along a Pair of CRLH SIW Lines

Space Leaky Waves Propagating along a Pair of CRLH SIW Lines RADIOENGINEERING, VOL. 27, NO. 3, SEPTEMBER 2018 633 Space Leaky Waves Popagating along a Pai of CRLH SIW Lines Rihem NOUMI 1, Jan MACHAC 2, Ali GHARSALLAH 1 1 Dept. of Physics, Faculty of Sciences of

More information

HYBRID FUZZY PD CONTROL OF TEMPERATURE OF COLD STORAGE WITH PLC

HYBRID FUZZY PD CONTROL OF TEMPERATURE OF COLD STORAGE WITH PLC Jounal of Theoetical and Applied Infomation Technology 28 th Febuay 2013. Vol. 48 No.3 2005-2013 JATIT & LLS. All ights eseved. ISSN: 1992-8645 www.jatit.og E-ISSN: 1817-3195 HYBRID FUZZY PD CONTROL OF

More information

Available online at ScienceDirect. Procedia Engineering 100 (2015 )

Available online at  ScienceDirect. Procedia Engineering 100 (2015 ) Available online at www.sciencediect.com ScienceDiect Pocedia Engineeing 1 (215 ) 1 14 25th DAAAM Intenational Symposium on Intelligent Manufactuing and Automation DAAAM 214 Measuement of Complex Pemittivity

More information

Chapter 2 Instrumentation for Analytical Electron Microscopy Lecture 6. Chapter 2 CHEM 793, 2011 Fall

Chapter 2 Instrumentation for Analytical Electron Microscopy Lecture 6. Chapter 2 CHEM 793, 2011 Fall Chapte Instumentation fo Analytical Electon Micoscopy Lectue 6 Chapte CHEM 793, 011 Fall Outline Electon Souces (Electon Guns) Themionic: La 6 o W Field emission gun: cold o Schottky Lenses Focusing Abeation

More information

Study and Design of Dual Frequency High Gain and Conformal Microstrip Patch Antenna

Study and Design of Dual Frequency High Gain and Conformal Microstrip Patch Antenna , pp.236-243 http://dx.doi.og/10.14257/astl.2017.147.33 Study and Design of Dual Fequency High Gain and Confomal Micostip Patch Antenna S. Auna 1, K. Sinivasa Naik 2, J. Ramesh 2 and D. Madhu 2 1 Andha

More information

Investigation for the Optimal Thermo Hydraulic Performance in Three Sides Artificially Roughened Solar Air Heaters

Investigation for the Optimal Thermo Hydraulic Performance in Three Sides Artificially Roughened Solar Air Heaters Investigation fo the Optimal Themo Hydaulic Pefomance in Thee Sides Atificially Roughened Sola Ai Heates Ashwini Kuma 1, Auna Kuma Behua 2, Ravi Kuma 3 1 Assistant Pofesso, Depatment of Mechanical Engineeing,

More information

International Journal of Engineering Research-Online A Peer Reviewed International Journal Articles available online

International Journal of Engineering Research-Online A Peer Reviewed International Journal Articles available online A Pee Reviewed Intenational Jounal Aticles available online http://www.ijoe.in REVIEW ARTICLE ISSN: 2321-7758 GAIN ENHANCEMENT OF MICROSTRIP ANTENNA USING SQUARE ARRAY RAHUL GUPTA 1, BRIJESH DHAKKAR 2,GARIMA

More information

Statement of Works Data Template Version: 4.0 Date:

Statement of Works Data Template Version: 4.0 Date: Statement of Woks Data Template Vesion: 4.0 Date: 16.08.17 This Statement of Woks (SoW) Data Template is to be completed by Distibution Netwok Opeatos (DNOs) in ode to povide National Gid the equied data

More information

Experiments with the HoloEye LCD spatial light modulator

Experiments with the HoloEye LCD spatial light modulator Expeiments with the HoloEye LCD spatial light modulato HoloEye model LC00 spatial light modulato The HoloEye (http://www.holoeye.com/spatial_light_modulato_lc_00.html) LC 00 Spatial Light Modulato (SLM)

More information

NICKEL RELEASE REGULATIONS, EN 1811:2011 WHAT S NEW?

NICKEL RELEASE REGULATIONS, EN 1811:2011 WHAT S NEW? NICKEL RELEASE REGULATIONS, EN 1811:2011 WHAT S NEW? BACKGROUND: EN 1811 is the intenationally ecognised test method which was devised almost 12 yeas ago to detemine the ate of nickel elease fom jewelley,

More information

Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, China

Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration, China Shake Table Test fo Lage Indiect-Ai-Cooling Towe Stuctue of Fie Powe Plant Pat I Junwu DAI, Yongqiang YANG & Xuan WNG Key Laboatoy of athquake ngineeing and ngineeing Vibation, China athquake Administation,

More information

Helical Antenna Performance in Wideband Communications

Helical Antenna Performance in Wideband Communications Helical Antenna Pefomance in Wideband Communications Maja Šekelja 1, Zoan Blažević, Maino Maslać 3 1,,3 Univesity of Split, Faculty of Electical Engineeing, Mechanical Engineeing and Naval Achitectue,

More information

Reliability Model of Power Transformer with ONAN Cooling

Reliability Model of Power Transformer with ONAN Cooling Reliability Mol of owe Tansfome with ONAN Cooling M. Sefidgaan*, M. Mizaie* and A. Ebahimzah* Abstact: Reliability of a powe system is consiably influenced by its equipments. owe tansfomes ae one of the

More information

Optimization of the law of variation of shunt regulator impedance for Proximity Contactless Smart Card Applications to reduce the loading effect.

Optimization of the law of variation of shunt regulator impedance for Proximity Contactless Smart Card Applications to reduce the loading effect. Optimization of the law of vaiation of shunt egulato impedance fo Poximity Contactless Smat Cad Applications to educe the loading effect. Catheine Maechal, Dominique Paet. Laboatoie LIT ESIGETEL, ue du

More information

Realistic Simulation of a Wireless Signal Propagation in an Urban Environment

Realistic Simulation of a Wireless Signal Propagation in an Urban Environment Realistic Simulation of a Wieless Signal Popagation in an Uban Envionment Keyukuma J. Patel Univesity of Southen Queensland Toowoomba, Austalia e-mail: keyupatel@ieee.og Andew Y. J. Lee Nanyang Technological

More information

ECE 6640 Digital Communications

ECE 6640 Digital Communications ECE 6640 Digital Communications D. Badley J. Bazuin Assistant ofesso Depatment of Electical and Compute Engineeing College of Engineeing and Applied Sciences Chapte 5 5. Communications Link Analysis. 1.

More information

SERVO CONTROL OF RF CAVITIES UNDER BEAM LOADING

SERVO CONTROL OF RF CAVITIES UNDER BEAM LOADING SERVO CONTROL OF RF CAVITIES UNDER BEAM LOADING Alexande Gamp DESY, Hambug, Gemany Abstact I begin by giving a desciption of the RF geneato cavity beam coupled system in tems of basic quantities. Taking

More information

Discussion #7 Example Problem This problem illustrates how Fourier series are helpful tools for analyzing electronic circuits. Often in electronic

Discussion #7 Example Problem This problem illustrates how Fourier series are helpful tools for analyzing electronic circuits. Often in electronic Discussion #7 Example Poblem This poblem illustates how Fouie seies ae helpful tools fo analyzing electonic cicuits. Often in electonic cicuits we need sinusoids of vaious fequencies But we may aleady

More information

Minimizing Ringing and Crosstalk

Minimizing Ringing and Crosstalk Minimizing Ringing and Cosstalk By Glen Dash, Ampyx LLC, GlenDash at alum.mit.edu Copyight 1998, 26 Ampyx LLC When viewed on a schematic, a wie is just a wie. Howeve, when isetimes shink to a few nanoseconds

More information

Optimised Wireless Network Using Smart Mobile Terminal Antenna (SMTA) System

Optimised Wireless Network Using Smart Mobile Terminal Antenna (SMTA) System Optimised Wieless Netwok Using Smat Mobile Teminal Antenna (SMTA) System Autho Lu, Junwei, Sciven, Ian, Wate, Wayne Published 2010 Confeence Title Poceedings of IEEE APEMC2010 DOI https://doi.og/10.1109/apemc.2010.5475858

More information

WIRELESS SENSORS EMBEDDED IN CONCRETE

WIRELESS SENSORS EMBEDDED IN CONCRETE 7th Euopean Wokshop on Stuctual Health Monitoing July 8-11, 2014. La Cité, Nantes, Fance Moe Info at Open Access Database www.ndt.net/?id=17296 WIRELESS SENSORS EMBEDDED IN CONCRETE Amal Abbadi 1 Phd Student,

More information

ABSTRACTT FFT FFT-' Proc. of SPIE Vol U-1

ABSTRACTT FFT FFT-' Proc. of SPIE Vol U-1 Phase econstuction stategies in phase-locking system based on multi-apetue wave font sensos P.A. Semenov, S.D. Pol skikh Shvabe-Reseach, Moscow, Russian Fedeation; e-mail: pite@bk.u ABSTRACTT System of

More information

On Implementation Possibilities of High-Voltage IGBTs in Resonant Converters

On Implementation Possibilities of High-Voltage IGBTs in Resonant Converters On Implementation Possibilities of High-Voltage IGBTs in Resonant Convetes Andei Blinov and Dmiti Vinnikov Tallinn Univesity of Technology, Ehitajate tee 5, 986 Tallinn, Estonia Abstact. The conventional

More information

ISSN: [Reddy & Rao* et al., 5(12): December, 2016] Impact Factor: 4.116

ISSN: [Reddy & Rao* et al., 5(12): December, 2016] Impact Factor: 4.116 IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY SIMULATION COMPARISONS OF INDUCTION MOTOR DRIVE WITH ESTIMATOR AND PLL V. Nasi Reddy *, S. Kishnajuna Rao*, S.Nagenda Kuma * Assistant

More information

A New Method of VHF Antenna Gain Measurement Based on the Two-ray Interference Loss

A New Method of VHF Antenna Gain Measurement Based on the Two-ray Interference Loss 7 nd Intenational Confeence on Atificial Intelligence and Engineeing Applications (AIEA 7) ISBN: 978--6595-485- A New Method of VH Antenna Gain Measuement Based on the Two-ay Intefeence Loss ZHIEI YANG,

More information

Near-field emission prediction of CESAME

Near-field emission prediction of CESAME Nea-field emission pediction of CESAME E. Sicad, S. Ben Dhia, E. Lamoueux INSA-GEI, 135 Av de Rangueil 31077 Toulouse Fance B. Vignon, L. Couau ST Micoelectonics, Cental R&D Colles, Fance Contact : etienne.sicad@insa-toulouse.f

More information

Channel Modelling ETIM10. Fading Statistical description of the wireless channel

Channel Modelling ETIM10. Fading Statistical description of the wireless channel Channel Modelling ETIM10 Lectue no: 3 Fading Statistical desciption of the wieless channel Ghassan Dahman \ Fedik Tufvesson Depatment of Electical and Infomation Technology Lund Univesity, Sweden 013-01-8

More information

TECHNICAL REPORT: CVEL Maximum Radiated Emission Calculator: Power Bus EMI Algorithm. Chentian Zhu and Dr. Todd Hubing. Clemson University

TECHNICAL REPORT: CVEL Maximum Radiated Emission Calculator: Power Bus EMI Algorithm. Chentian Zhu and Dr. Todd Hubing. Clemson University TECHNICAL REPORT: CVEL-13-053 Maximum Radiated Emission Calculato: Powe Bus EMI Algoithm Chentian Zhu and D. Todd Hubing Clemson Univesity Octobe 12, 2013 Abstact The Maximum Radiated Electomagnetic Emissions

More information

Fuzzy ogic Impoved Static Synchonous Compensato to Contol Voltage of a Gid-connected Squiel Cage Induction Geneato Reza Shaifian Dastjedi 1, Ehsan Jafai 2, Fashad Kabii 3, ayam Ghaebi anah 4 1,2,3,4 Depatment

More information