Harmonics Phase Shifter for a Three-Phase System with Voltage Control by Integral-Cycle Triggering Mode of Thyristors
|
|
- Harold Gibbs
- 5 years ago
- Views:
Transcription
1 America Joural of Applied Scieces 5 (11): , 2008 ISSN Sciece Publicatios Harmoics Phase Shifter for a hree-phase System with Voltage Cotrol by Itegral-Cycle riggerig Mode of hyristors I. Badra, A.L. Mahmood ad M.. Lazim Departmet of Electrical Egieerig, Philadelphia Uiversity, Jorda Abstract: I itegral-cycle triggerig mode of voltage cotrol, subharmoic as well as higher order harmoic compoets are geerated i the load voltage waveforms of a three-phase system. hese harmoic compoets are foud to be ubalaced i phase displacemet. he correctio of the ubalaced phase displacemet agles of a particular subharmoic or higher order harmoic for this type of triggerig is ivestigated to solve the limitatio of use of this importat type of cotrol as a drive ad may other idustrial applicatios. I this research a ew phase shiftig techique is proposed to correct the ubalaced phase displacemet agles i the three-phase system. his techique depeds o shiftig the waveforms of either phase B or phase C or both by multiples of 2π. A microprocessor-based harmoic phase shifter is desiged ad tested with three-phase resistive ad iductio motor loads. It is foud that there is a well agreemet betwee the theoretical ad experimetal results ad it is believed that the maor problem of harmoics phase ubalaces associated with the itegral-cycle triggerig mode of thyristors whe used with three-phase circuits have bee solved i the preset research. Key words: Harmoics, itegral cycle cotrol, power electroics, phase agle correctio, phase shifter, ac motor speed cotrol INRODUCION Load voltage cotrol by meas of switchig a pair of iverse parallel coected thyristors or triac is well established. It is customary to use modes of thyristor triggerig kow as itegral-cycle triggerig whereby burst of complete cycles of curret are followed by complete cycles of extictio [1-4]. Itegral-cycle triggerig results i coductio patters that cotai subharmoics of the supply frequecy ad so costitute a form of step-dow frequecy chagig that ca be cosidered as a form of frequecy chager. Also itegral-cycle triggerig results i a cosiderable reductio i the amplitudes of the higher order harmoics as compared with other triggerig techiques ad it is possible that Radio Frequecy Iterferece (RFI) is egligible [2]. he phase-cotrol switchig ca produce higher order harmoics ad heavy irush curret while switchig o i a cold start [5], while itegral-cycle cotrol circuits have the advatage of low irush curret due to zero voltage switchig ease i costructio ad low hardware cost. herefore, itegral-cycle cotrol loads have bee widely used i resistive loads, such as heaters, ove, furaces ad spot welders [6-8]. Also it is used i speed cotrol of siglephase iductio motor [9] ad dc series motor [10]. As a frequecy chagig scheme, itegral-cycle triggerig was foud ot feasible for applicatios i the three-phase systems exploitig this techique for ac motor speed cotrol [11]. his is because the amplitudes ad phase displacemet agles of the higher order harmoic ad subharmoic compoets of the itegralcycle cotrolled waveform are determied by the coductio period N ad the cotrol period ad the order of the idividual harmoic. he three-phase aalysis of voltage ad curret waveforms ad phase relatioships of the geerated harmoic ad subharmoic compoets for differet circuit cofiguratios are described i [12,13]. Cosider a three-phase resistive load with lie voltage cotrol as show i Fig. 1. he resultig threeload voltage waveforms are idetical ad so are the three-load curret waveforms. he supply frequecy compoets are foud to be balaced, sice they are 120 o apart i time-phase while the phase displacemet agles of a particular subharmoic or higher order harmoic are ubalaced [11,12]. Due to the ubalaced phase relatioships of the subharmoic compoets, these compoets represet a source of trouble whe these voltage waveforms are used to feed ac machies for speed cotrol purposes [11]. I this research a attempt is made to study the phase ubalaced Correspodig Author: I. Badra, Departmet of Electrical Egieerig, Philadelphia Uiversity, Jorda 1580
2 A v LA v LA 2v B v LB v LB 2π 4π Phase A ax Phase B C v LC 2π 3 ax v LC N Fig. 1: Four-wire star-coected load with lie cotrollers characteristics of the subharmoics as well as the higher order harmoics geerated due to itegral-cycle triggerig ad to fid a ew phase shiftig techique that is capable of correctig the ubalaced phases based o microprocessor implemetatio [14]. HE PROPOSED PHASE SHIFING ECHNIQUE Figure 2 shows the waveforms of the load voltages for the case whe usig itegral-cycle cotrol with cotrol period = 2 ad coductio period N = 1, for the circuit show i Fig. 1 with R-L load. Let the otatio 1, 2, 3 deote the three phases A, B ad C respectively. hus the load voltage (v L ) for ay th phase will have the geeral form [12]. γ 2π N + φ + γ vl = 2 Vsi( ωt γ ) ωt (1) where = 1, 2, 3 γ = 0, γ = 2 π/3, γ = 4 π/ φ = ta 1 ωl R Fourier aalysis of Eq. 1 results i the followig mathematical expressios: for, the dc compoet is: 2 V a 0 = 1 cosφ π [ ] (2) he amplitude c of th order subharmoic or higher order harmoic as well as its phase displacemet ψ are foud as follows: 2π4 π 33 Phase C Fig. 2: ypical load voltages for phases A, B ad C a b γ cos cosφcos 2π N + φ + γ 2 V = π( ) si φsi ( 2π + φ + γ ) ( ) γ si cos φsi 2π N + φ + γ 2 V = π( ) + si φcos ( 2π + φ + γ ) c = a + b c 2 2 ( ) 2 1/ 2 2 cos ( 2π N + φ) cos φ 2 V = π( ) + si ( 2π N + φ) si φ ψ = ta ψ = ta 1 1 a b γ cos cosφcos ( 2π N + φ + γ ) si φsi ( 2π + φ + γ ) γ si cosφsi ( 2π N + φ + γ ) + siφcos ( 2π + φ + γ ) ax (3) (4) (5) (6) For =, the supply frequecy compoet, the Fourier coefficiets are: 1581
3 a = 2 V cos 2( 2 N ) si cos( 2 ) 4 γ π + φ γ φ + γ π b = 2 V si 2( 2 N ) cos si( 2 ) 4 γ + π + φ γ φ + γ π (7) (8) 2 V 1/ 2 c = 2( 1 cos2 ) 4( 2 N )( 2 N si 2 ) 4π φ + π + φ π + φ φ (9) a 1 ψ = ta (10) b It is foud i [15] that the th frequecy compoet of load curret i phase A (ψ 1 ) leads that of phase B ο ο (ψ 2 ) by 120 ad (ψ 2 ) leads (ψ 3 ) by 120 also. However, if the phase displacemet of the th phase (γ ) is shifted accordig to the followig relatioship: γ = γ + 2π m (11) where, γ represet the ew shiftig agle ad m = 1,2,..., 1. m = 0, γ = 0, γ = 2 π/3, ad γ = 4 π / his ew value of γ do ot affect the amplitude ad phase agle relatioships of the supply frequecy compoets at the load voltages. It ca be see from Eq. 5, that the amplitude of the th harmoic is idepedet of γ, which meas that, the variatio of γ does ot affect the harmoic amplitude spectrum of the th phase. Oly the phase displacemet agle ψ of the th harmoic is chaged as could be see from Eq. 6. he phase displacemet agle ψ of the th harmoic varies with the variatio of m. Now after shiftig the load voltage waveform of phase B or C or both of them by multiple of 2π the th frequecy compoet of load curret i phase A (ψ 1 ) leads that of phase B (ψ 2 ) by + (12) Ο Ο ( m 2) Fig. 2 are show i Fig. 3 ad 4 respectively. It is see that, the phase displacemet agles of the subharmoics ad the higher order harmoics are ubalaced. Now, if the phase displacemet agle of phase B, i.e., ψ 2 is shifted by 180 the the phase displacemet agles of the 1st harmoic (25 Hz) ad the 5th harmoic (125 Hz), as for example, become balaced. he ew values of ψ 2 for the 1st, 3rd ad 5th harmoics which are ψ 12 = 210 o, ψ 32 = 270 ad ψ 52 = 150 o respectively give the value m 2 = 1 ad the ew value of γ 2 is equal to 480 o. he harmoic amplitude spectrum ad the phase displacemet agles of the supply frequecy compoet remais uchaged with the ew value of γ 2, while the phase displacemet agles of the 1st, 3rd ad 5th harmoics chaged as show i Fig. 5a, c ad d respectively. It is foud that this shiftig techique makes the phase displacemet agles of the th harmoic order balaced (120 betwee the phases) except whe is a multiple of 3 where i this case the phase displacemet agles become i phase for all values of N ad except whe is a multiple of 3. Also it is oticed that the phase shiftig of the phase displacemet agles used i this techique do ot deped o the value of N. his meas that, the values of γ 2 ad γ 3 that makes th order harmoic balaced for certai values of N ad ca make it balaced as well for the same value of with N = N-1, N-2,, 1. able 1 shows the values of m 2 Amplitude (per uit) F requ e c y (H z) Fig. 3: Harmoic amplitude spectrum for = 2 ad N = 1, R-load ad (ψ 1 ) leads (ψ 3 ) by: able 1: he phase displacemet agles for typical values of ad N N m 2 m 3 Ο Ο ( m 3) (13) he harmoic amplitude spectrum ad the phase agle relatioships for the load voltage waveforms of
4 (a) (b) (c) (d) Fig. 4: Phase displacemet agles for = 2 ad N = 1, R-load (a): Phase displacemet agles for the 1st harmoic (25 Hz) (b): Phase displacemet agles for the supply frequecy compoet (c): Phase displacemet agles for the 3rd harmoic (75 Hz) (d): Phase displacemet agles for the 5th harmoic (125 Hz) (a ) (b ) (c ) (d ) Fig. 5: Phase displacemet agles for (a): 1st harmoic (25Hz) (b): supply frequecy compoet (50Hz) (c): 3rd harmoic (75Hz) (d): 5th harmoic (125Hz) 1583
5 Fig. 6: Schematic circuit diagram ad m 3 which make the phase displacemet agles of the th harmoic either balaced or i phase for typical values of ad N. his techique caot correct the phase displacemet agles of a particular subharmoic or higher order harmoic if is a multiple of 3. A D PRACICAL IMPLEMENAION he schematic diagram of the microprocessorbased harmoic phase shifter for itegral-cycle cotrol is show i Fig. 6. After reducig the three-phase supply voltage by the step-dow trasformers ( 1, 2 ad 3 ), the Zero Crossig Detector (ZCD) circuits produces the 180 pulses to a 8085 microprocessorbased system. he microprocessor ow ca sese the zero-istat of the ac supply. he the coductio of the triacs started by sedig high pulses to the gate drive circuits (the gate drive circuit used from [16] ). he output of each gate drive circuit is coected to pulse trasformers ( 4, 5 ad 6 ), that are used to isolate the microprocessor circuit from the power circuit. I order to esure successful triggerig of the triac the trigger voltage must be maitaied for the etire coductio period. his ca be achieved by usig a square pulses at high frequecy ad these pulses are geerated by the 1584 F OU v IA H Fig. 7: Waveforms of sigals at differet poits i the cotrol circuit timig circuit. A NAND gate is used to modulate the higher frequecy pulses with the mai coductio pulse. Figure 7 shows the sigals at differet stages i the cotrol circuit for phase A programmed for a coductio period of 1 cycle out of two. he square pulse E goes through a buffer circuit that is foud ecessary for the elimiatio of the dc bias geerated i the comparator. he microprocessor seds a square
6 pulses through PB0 of the 8155 with ON/OFF ratio equal to N/(-N). EXPERIMENAL RESULS he cotrol circuit show i Fig. 6 was built ad tested i the laboratory with a three-phase balaced resistive load. Fig. 8 ad 9 show oscillograms of the load voltage waveforms v LA, v LB ad v LC for the case whe = 4 ad N = 2 before ad after the applicatio of the phase-shiftig techique respectively. It is obvious that the phase-shiftig procedure does ot affect the wave shapes of the load voltage or curret. he system was tested also with a three-phase, cage-type iductio motor described i Appedix A. he stator widigs were coected i 4-wire, starcoected form. Practically this type of voltage cotrol, i.e. itegral-cycle, is foud to produce some problems to the motor such as oise, vibratio ad heat risig to the motor widigs. hese problems become severe especially at high voltages ad whe the motor rus cotiuously. However, able 2 shows the speed measuremet of the motor s at differet values of N ad usig a digital tachometer before ad after the phase displacemet agles correctio i additio with the frequecy of rotatio for each case that is calculated usig the followig equatio of the three-phase iductio motor speed [17] : will produce its ow speed. his meas that after the correctio of the phase displacemet agles of the first harmoic, the motor bega to rotate at the desired subharmoic frequecy. he three-phase iductio motor is loaded by a dc dyamometer available i the laboratory to examie the performace of the motor uder load coditio. he dc V o lta g e sc a le V /D IV. im e sc a le 1 0 m s/d IV. Fig. 8: Load voltage waveforms of phases A, B, C respectively before the correctio of the phase displacemet agles f s = 120 (14) p where, p = umber of poles ad f = supply frequecy. It is importat to metio that the motor rotates i the reverse directio for some cases after the correctio of the phase displacemet agles ad this is due to the variatio i the phase sequece after the correctio of the phase displacemet agles. However, the above results show that, the motor speed s is chaged after the correctio of the phase displacemet agles. his is because the phase displacemet agles of the first harmoic become balaced, i.e. separated by 120 o i time phase ad it Voltage scale 400V/DIV. ime scale 10ms/DIV. Fig. 9: Load voltage waveforms of phases A, B, c respectively after the correctio kof the phase displacemet agles able 2 : he speed measuremet of motor s at differet values usig phase-shiftig techique ad friquecy of rotatio of each sace s (r.p.m.) before Frequecy of s (r.p.m.) after Frequecy of Frequecy of the usig shiftig rotatio (Hz) usig shiftig rotatio (Hz) 1st harmoic (Hz) N techique (Experimetal) techique (Experimetal) (heoretical)
7 Fig. 10: Coectio diagram for separately-excited de dyamometer (r.p.m.) Curve il (A) Fig. 11: Speed-curret characteristic Am. J. Applied Sci., 5 (11): , 2008 Curve 1 dyamometer is coected as a separately excited machie as show i Fig. 10. he specificatios of the 3-phase motor ad the dyamometer are give i Appedix B. he field widig of the dyamometer is coected to a 220V dc source ad the field curret is set to the maximum permissible value. he motor speed s is the measured at differet values of load curret (i L ) for = 4 ad N = 2 for both before ad after correctio cases of ψ, the results are show o curve1 ad curve 2 i Fig. 11 respectively. It is foud that, the motor speed is reduced after the correctio of ψ ad this is obvious sice the motor rotates at the 1st harmoic frequecy. he highest value of the load curret show o curve2 is less tha that o curve1, this is because the geerated e.m.f. i the dyamometer proportioal to motor speed s ad ay reductio i the speed leads to further reductio i the geerated e.m.f. which i tur reduces the load curret. Also ay reductio i the value of the load resistace R i order to icrease the load curret at a certai value of V AH 1586 leads to a reductio i the speed. his limitatio i the loadig machie performace does ot allow us to take further readigs to reach maximum loadig of the motor. CONCLUSION he ubalaced sets of subharmoic ad higher order harmoic voltages geerated by itegral cycle cotrol techique create severe problems for ac machies as they foud to cause excessive heat, mechaical vibratios ad oise. herefore, this type of cotrol was abaded as a ac motor speed cotroller sice may years ago. he proposed phase shiftig techique i the preset work is a try to solve the iheret limitatio of this importat type of cotrol by shiftig the secod ad third phases of the three-phase system by multiples of 2. his techique is foud to be more suitable tha usig the phase-agle cotrol scheme to correct the ubalaced phase displacemet agles of the geerated harmoics. he last scheme is foud to cause ubalaced harmoic amplitude spectrums for the three phases. It is foud, from the theoretical ad practical tests, that the performace of the three-phase iductio motor with phase corrected voltage waveforms is very similar to that whe fed from balaced siusoidal voltages of the same amplitude ad frequecy whe usig the proposed phase-shifter. Fially, it is believed that the maor problems associated with itegral-cycle triggerig cotrol techique, whe used for speed cotrol of ac motor, have bee solved i the preset work. ACKNOWLEDGMENS he authors wish to ackowledge the support ad ecouragemets give by Ass. Prof. Xavier Kestely ad all the staff of the L2EP laboratory i ENSAM school of egieerig i Lille City -Frace. REFERENCES 1. Gallagher, P.J., A.B. Barret ad W. Shepherd, Aalysis of sigle-phase rectified thyristor cotrolled load with itegral-cycle triggerig. Proc. Ist. Elec. Eg., 117 (2) Ligard, B.W., R.W. Johso ad W. Shepherd, Aalysis of thyristor cotrolled sigle-phase loads with itegral-cycle triggerig. Proc. Ist. Elec. Eg., 117 (2): Gallagher, P.J. ad W. Shepherd, Operatio of two parallel coected thyristor cotrolled resistive loads with itegral-cycle triggerig. IEEE ras. Id. Electro. Cotrol Istrumetatio, IECI-22 (4):
8 4. Shepherd, W., hyristor Cotrol of ac Circuits. Bradford Uiversity Press, Eglad. 5. Syed Jamil Asgher, M., fie power cotrol by discotiuous phase-cotrolled switchig. IEEE ras. Circuits Syst., 46 (3): Chu Li, J.A.M. ad J.A.M. Wilsu Xu, O the ambiguity of defiig ad measurig iterharmoics. IEEE Power Eg. Rev., pp: Moha, N.,. Udelad ad W. Robbis, Power electroics. 2d Ed. New York: Wiley. 8. Krei, P., Elemets of power electroics. New York: Oxford Uiv. Press. 9. Krisha, R., B. Ilago, S. Selvarary ad S. Guasekara, Sigle-phase iductio motor speed cotrol with itegral-cycle switchig. IEEE ras. Id. Electro. Cotrol Istrumetatio, IECI-27 (4): Fetih, N.H., G.M. Abdel-Raheem ad G.A. Girgis, Speed cotrol of a DC series motor usig a itegral-cycle cotrolled sigle traic. IEEE ras. Eergy Coversio, 3 (3): Lazim, M.. ad W. Shepherd, Aalysis of iductio motor subected to osiusoidal voltages cotaiig subharmoics. IEEE ras. Id. Appli., IA-21 (4): Lazim, M.. ad W. Shepherd, hree-phase circuits with voltage cotrol by itegral-cycle sigle-phase mode triggerig of thyristors. IEEE ras. Id. Appli., 46 (5): Lazim, M.., Modulatio techiques i the speed cotrol of electric motors. Ph.D. hesis, Uiversity of Bradford, Eglad. 14. Mahmod, A.L., Microprocessor-based phase shifter for itegral-cycle cotrol. M.Sc. hesis, Al- Nahrai Uiversity, Iraq. 15. Yog Nog Chag, Gerald homas Heydt ad Yazhou Liu, he Impact of switchig strategies o power quality for itegral cycle cotrollers. IEEE ras. Power Delivery, 18 (3): Arifur Rahma, Syed Eamul Haque ad Ibrahim Abdul Rahma AL-Gadhi, A digital selfcompesatig method for itegral-cycle power cotrol of rl loads. IEEE ras. Id. Electro. Cotrol Istrumetatio, IECI-27 (2): Nasar, S.A. ad L.E. Uewehr, Electromechaics ad Electric Machies. Joh Wiley ad Sos, Ic. 1587
Design of FPGA- Based SPWM Single Phase Full-Bridge Inverter
Desig of FPGA- Based SPWM Sigle Phase Full-Bridge Iverter Afarulrazi Abu Bakar 1, *,Md Zarafi Ahmad 1 ad Farrah Salwai Abdullah 1 1 Faculty of Electrical ad Electroic Egieerig, UTHM *Email:afarul@uthm.edu.my
More informationSEVEN-LEVEL THREE PHASE CASCADED H-BRIDGE INVERTER WITH A SINGLE DC SOURCE
SEVEN-LEVEL THREE PHASE CASCADED H-BRIDGE INVERTER WITH A SINGLE DC SOURCE T. Porselvi 1 ad Ragaath Muthu 1 Sri Sairam Egieerig College, Cheai, Idia SSN College of Egieerig, Cheai, Idia E-Mail: tporselvi@yahoo.com
More informationA New Basic Unit for Cascaded Multilevel Inverters with the Capability of Reducing the Number of Switches
Joural of Power Electroics, ol, o, pp 67-677, July 67 JPE --6 http://dxdoiorg/6/jpe67 I(Prit: 98-9 / I(Olie: 9-78 A ew Basic Uit for Cascaded Multi Iverters with the Capability of Reducig the umber of
More informationDesign of FPGA Based SPWM Single Phase Inverter
Proceedigs of MUCEET2009 Malaysia Techical Uiversities Coferece o Egieerig ad Techology Jue 20-22, 2009, MS Garde,Kuata, Pahag, Malaysia MUCEET2009 Desig of FPGA Based SPWM Sigle Phase Iverter Afarulrazi
More informationMEASUREMENT AND CONTORL OF TOTAL HARMONIC DISTORTION IN FREQUENCY RANGE 0,02-10KHZ.
ELECTRONICS 00 September, Sozopol, BLGARIA MEASREMENT AND CONTORL OF TOTAL HARMONIC DISTORTION IN FREQENCY RANGE 0,0-0KHZ. Plame Agelov Agelov Faculty for Computer Sciece, Egieerig ad Natural Studies,
More informationINCREASE OF STRAIN GAGE OUTPUT VOLTAGE SIGNALS ACCURACY USING VIRTUAL INSTRUMENT WITH HARMONIC EXCITATION
XIX IMEKO World Cogress Fudametal ad Applied Metrology September 6, 9, Lisbo, Portugal INCREASE OF STRAIN GAGE OUTPUT VOLTAGE SIGNALS ACCURACY USING VIRTUAL INSTRUMENT WITH HARMONIC EXCITATION Dalibor
More informationAN ESTIMATION OF MULTILEVEL INVERTER FED INDUCTION MOTOR DRIVE
9 IJRIC. All rights reserved. IJRIC www.ijric.org E-ISSN: 76-3336 AN ESTIMATION OF MULTILEVEL INVERTER FED INDUCTION MOTOR DRIVE K.RAMANI AND DR.A. KRISHNAN SMIEEE Seior Lecturer i the Departmet of EEE
More informationApplication of Improved Genetic Algorithm to Two-side Assembly Line Balancing
206 3 rd Iteratioal Coferece o Mechaical, Idustrial, ad Maufacturig Egieerig (MIME 206) ISBN: 978--60595-33-7 Applicatio of Improved Geetic Algorithm to Two-side Assembly Lie Balacig Ximi Zhag, Qia Wag,
More informationAPPLICATION NOTE UNDERSTANDING EFFECTIVE BITS
APPLICATION NOTE AN95091 INTRODUCTION UNDERSTANDING EFFECTIVE BITS Toy Girard, Sigatec, Desig ad Applicatios Egieer Oe criteria ofte used to evaluate a Aalog to Digital Coverter (ADC) or data acquisitio
More informationA New Design of Log-Periodic Dipole Array (LPDA) Antenna
Joural of Commuicatio Egieerig, Vol., No., Ja.-Jue 0 67 A New Desig of Log-Periodic Dipole Array (LPDA) Atea Javad Ghalibafa, Seyed Mohammad Hashemi, ad Seyed Hassa Sedighy Departmet of Electrical Egieerig,
More informationE X P E R I M E N T 13
E X P E R I M E N T 13 Stadig Waves o a Strig Produced by the Physics Staff at Colli College Copyright Colli College Physics Departmet. All Rights Reserved. Uiversity Physics, Exp 13: Stadig Waves o a
More informationCHAPTER 5 A NEAR-LOSSLESS RUN-LENGTH CODER
95 CHAPTER 5 A NEAR-LOSSLESS RUN-LENGTH CODER 5.1 GENERAL Ru-legth codig is a lossless image compressio techique, which produces modest compressio ratios. Oe way of icreasig the compressio ratio of a ru-legth
More informationA Bipolar Cockcroft-Walton Voltage Multiplier for Gas Lasers
America Joural of Applied cieces 4 (10): 79-799, 007 N 1546-99 007 ciece Publicatios orrespodig Author: A Bipolar ockcroft-walto Voltage Multiplier for Gas Lasers hahid qbal ad Rosli Besar Faculty of Egieerig
More informationAnalysis and Optimization Design of Snubber Cricuit for Isolated DC-DC Converters in DC Power Grid
Aalysis ad Optimizatio Desig of Subber Cricuit for Isolated DC-DC Coverters i DC Power Grid Koji Orikawa Nagaoka Uiversity of Techology Nagaoka, Japa orikawa@st.agaokaut.ac.jp Ju-ichi Itoh Nagaoka Uiversity
More information(2) The MOSFET. Review of. Learning Outcome. (Metal-Oxide-Semiconductor Field Effect Transistor) 2.0) Field Effect Transistor (FET)
EEEB73 Electroics Aalysis & esig II () Review of The MOSFET (Metal-Oxide-Semicoductor Field Effect Trasistor) Referece: Neame, Chapter 3 ad Chapter 4 Learig Outcome Able to describe ad use the followig:
More informationSEE 3263: ELECTRONIC SYSTEMS
SEE 3263: ELECTRONIC SYSTEMS Chapter 5: Thyristors 1 THYRISTORS Thyristors are devices costructed of four semicoductor layers (pp). Four-layer devices act as either ope or closed switches; for this reaso,
More informationDelta- Sigma Modulator with Signal Dependant Feedback Gain
Delta- Sigma Modulator with Sigal Depedat Feedback Gai K.Diwakar #1 ad V.Vioth Kumar *2 # Departmet of Electroics ad Commuicatio Egieerig * Departmet of Electroics ad Istrumetatio Egieerig Vel Tech Uiversity,Cheai,
More informationDIGITALLY TUNED SINUSOIDAL OSCILLATOR USING MULTIPLE- OUTPUT CURRENT OPERATIONAL AMPLIFIER FOR APPLICATIONS IN HIGH STABLE ACOUSTICAL GENERATORS
Molecular ad Quatum Acoustics vol. 7, (6) 95 DGTALL TUNED SNUSODAL OSCLLATOR USNG MULTPLE- OUTPUT CURRENT OPERATONAL AMPLFER FOR APPLCATONS N HGH STABLE ACOUSTCAL GENERATORS Lesław TOPÓR-KAMŃSK Faculty
More informationPerformance and Analysis with Power Quality improvement with Cascaded Multi-Level Inverter Fed BLDC Motor Drive
Iteratioal Joural of Recet Advaces i Egieerig & Techology (IJRAET) Performace ad Aalysis with Power Quality improvemet with Cascaded Multi-Level Iverter Fed BLDC Motor Drive 1 N. Raveedra, 2 V.Madhu Sudha
More informationFingerprint Classification Based on Directional Image Constructed Using Wavelet Transform Domains
7 Figerprit Classificatio Based o Directioal Image Costructed Usig Wavelet Trasform Domais Musa Mohd Mokji, Syed Abd. Rahma Syed Abu Bakar, Zuwairie Ibrahim 3 Departmet of Microelectroic ad Computer Egieerig
More informationAC : USING ELLIPTIC INTEGRALS AND FUNCTIONS TO STUDY LARGE-AMPLITUDE OSCILLATIONS OF A PENDULUM
AC 007-7: USING ELLIPTIC INTEGRALS AND FUNCTIONS TO STUDY LARGE-AMPLITUDE OSCILLATIONS OF A PENDULUM Josue Njock-Libii, Idiaa Uiversity-Purdue Uiversity-Fort Waye Josué Njock Libii is Associate Professor
More informationSummary of pn-junction (Lec )
Lecture #12 OUTLNE iode aalysis ad applicatios cotiued The MOSFET The MOSFET as a cotrolled resistor Pich-off ad curret saturatio Chael-legth modulatio Velocity saturatio i a short-chael MOSFET Readig
More informationMeasurement of Equivalent Input Distortion AN 20
Measuremet of Equivalet Iput Distortio AN 2 Applicatio Note to the R&D SYSTEM Traditioal measuremets of harmoic distortio performed o loudspeakers reveal ot oly the symptoms of the oliearities but also
More informationMultilevel Inverter with Dual Reference Modulation Technique for Grid-Connected PV System
Multilevel Iverter with Dual Referece Modulatio Techique f Grid-Coected PV System N. A. Rahim, Sei Member, IEEE, J. Selvaraj Abstract This paper presets a sigle-phase five-level gridcoected PV iverter
More informationHOW BAD RECEIVER COORDINATES CAN AFFECT GPS TIMING
HOW BAD RECEIVER COORDINATES CAN AFFECT GPS TIMING H. Chadsey U.S. Naval Observatory Washigto, D.C. 2392 Abstract May sources of error are possible whe GPS is used for time comparisos. Some of these mo
More informationSingle Bit DACs in a Nutshell. Part I DAC Basics
Sigle Bit DACs i a Nutshell Part I DAC Basics By Dave Va Ess, Pricipal Applicatio Egieer, Cypress Semicoductor May embedded applicatios require geeratig aalog outputs uder digital cotrol. It may be a DC
More informationHigh-Order CCII-Based Mixed-Mode Universal Filter
High-Order CCII-Based Mixed-Mode Uiversal Filter Che-Nog Lee Departmet of Computer ad Commuicatio Egieerig, Taipei Chegshih Uiversity of Sciece ad Techology, Taipei, Taiwa, R. O. C. Abstract This paper
More informationProblem of calculating time delay between pulse arrivals
America Joural of Egieerig Research (AJER) 5 America Joural of Egieerig Research (AJER) e-issn: 3-847 p-issn : 3-936 Volume-4, Issue-4, pp-3-4 www.ajer.org Research Paper Problem of calculatig time delay
More informationGeneralization of Selective Harmonic Control/Elimination
Geeralizatio of Selective Harmoic Cotrol/Elimiatio J.R. Wells, P.L. Chapma, P.T. rei Graiger Ceter for Electric Machiery ad Electromechaics Departmet of Electrical ad Computer Egieerig Uiversity of Illiois
More informationLogarithms APPENDIX IV. 265 Appendix
APPENDIX IV Logarithms Sometimes, a umerical expressio may ivolve multiplicatio, divisio or ratioal powers of large umbers. For such calculatios, logarithms are very useful. They help us i makig difficult
More informationDesign and Construction of a Three-phase Digital Energy Meter
Desig ad Costructio of a Three-phase Digital Eergy Meter D.P.Chadima, V.G.R.G. Jayawardae, E.A.E.H. Hemachadra, I.N.Jayasekera, H.V.L.Hasaraga, D.C. Hapuarachchi (chadima@elect.mrt.ac.lk, geethagaj@gmail.com,era.hem@gmail.com,ishaivaka@gmail.com,lahiru_hasaraga@yahoo.com,diya_elect.uom@gmail.com)
More informationCONTROLLING FREQUENCY INFLUENCE ON THE OPERATION OF SERIAL THYRISTOR RLC INVERTERS
EETRONIS - September, Sozopol, BUGARIA ONTROING FREQUENY INFUENE ON THE OPERATION OF SERIA THYRISTOR R INVERTERS Evgeiy Ivaov Popov, iliya Ivaova Pideva, Borislav Nikolaev Tsakovski Departmet of Power
More informationAnalysis, Design and Experimentation of Series-parallel LCC Resonant Converter for Constant Current Source.
This article has bee accepted ad published o J-STAGE i advace of copyeditig. Cotet is fial as preseted. Aalysis, Desig ad Experimetatio of Series-parallel LCC Resoat Coverter for Costat Curret Source.
More informationDevelopment of Improved Diode Clamped Multilevel Inverter Using Optimized Selective Harmonic Elimination Technique
Emergig Treds i Electrical, Electroics & Istrumetatio Egieerig: A iteratioal Joural (EEIEJ), Vol, No, August Developmet of Improved Diode Clamped Multilevel Iverter Usig Optimized Selective Harmoic Elimiatio
More informationA New 3-Bit Integrating Time to Digital Converter Using Time to Voltage Conversion Technique
Bulleti of Eviromet, Pharmacology ad Life Scieces Bull. Ev. Pharmacol. Life Sci., ol 3 [11] October 2014:115-122 2014 Academy for Eviromet ad Life Scieces, dia Olie SSN 2277-1808 Joural s URL:http://www.bepls.com
More informationPROJECT #2 GENERIC ROBOT SIMULATOR
Uiversity of Missouri-Columbia Departmet of Electrical ad Computer Egieerig ECE 7330 Itroductio to Mechatroics ad Robotic Visio Fall, 2010 PROJECT #2 GENERIC ROBOT SIMULATOR Luis Alberto Rivera Estrada
More informationELEC 350 Electronics I Fall 2014
ELEC 350 Electroics I Fall 04 Fial Exam Geeral Iformatio Rough breakdow of topic coverage: 0-5% JT fudametals ad regios of operatio 0-40% MOSFET fudametals biasig ad small-sigal modelig 0-5% iodes (p-juctio
More informationDistorting and Unbalanced Operating Regime A Possible Diagnosis Method?
Distortig ad Ubalaced Operatig Regime A Possible Diagosis Method? Petre-Maria NICOLAE, Uiversity of Craiova. Faculty of Electrotechics, picolae@elth.ucv.ro, Decebal Blv. 107, Craiova, 00440, ROMANIA Abstract.
More informationFault Diagnosis in Rolling Element Bearing Using Filtered Vibration and Acoustic Signal
Volume 8 o. 8 208, 95-02 ISS: 3-8080 (prited versio); ISS: 34-3395 (o-lie versio) url: http://www.ijpam.eu ijpam.eu Fault Diagosis i Rollig Elemet Usig Filtered Vibratio ad Acoustic Sigal Sudarsa Sahoo,
More informationLaboratory Exercise 3: Dynamic System Response Laboratory Handout AME 250: Fundamentals of Measurements and Data Analysis
Laboratory Exercise 3: Dyamic System Respose Laboratory Hadout AME 50: Fudametals of Measuremets ad Data Aalysis Prepared by: Matthew Beigto Date exercises to be performed: Deliverables: Part I 1) Usig
More informationdoi: info:doi/ /ifeec
doi: ifo:doi/1.119/ifeec.17.799153 Trasformer Desig Difficulties of Curret Resoat Coverter for High Power Desity ad Wide Iput ltage Rage Toshiyuki Zaitsu Embedded System Research Ceter Omro Corporatio
More informationADITIONS TO THE METHOD OF ELECTRON BEAM ENERGY MEASUREMENT USING RESONANT ABSORPTION OF LASER LIGHT IN A MAGNETIC FIELD.
ADITIONS TO THE METHOD OF ELECTRON BEAM ENERGY MEASUREMENT USING RESONANT ABSORPTION OF LASER LIGHT IN A MAGNETIC FIELD. Melikia R.A. (YerPhI Yereva) 1. NEW CONDITION OF RESONANT ABSORPTION Below we ca
More informationA Novel Small Signal Power Line Quality Measurement System
IMTC 3 - Istrumetatio ad Measuremet Techology Coferece Vail, CO, USA, - May 3 A ovel Small Sigal Power Lie Quality Measuremet System Paul B. Crilly, Erik Leadro Boaldi, Levy Ely de Lacarda de Oliveira,
More informationAnalysis and Software Implementation of a Robust Synchronizing Circuit PLL Circuit
Aalysis ad Software Implemetatio of a Robust Sychroizig Circuit PLL Circuit Diogo R. COSTA, Jr., Luís G. B. ROLIM, ad Maurício AREDES 3,,3 COPPE, UFRJ, Cidade Uiversitária, Rio de Jaeiro, Brazil, e-mail
More informationIntermediate Information Structures
Modified from Maria s lectures CPSC 335 Itermediate Iformatio Structures LECTURE 11 Compressio ad Huffma Codig Jo Roke Computer Sciece Uiversity of Calgary Caada Lecture Overview Codes ad Optimal Codes
More informationA SIMPLE METHOD OF GOAL DIRECTED LOSSY SYNTHESIS AND NETWORK OPTIMIZATION
A SIMPL MOD OF GOAL DIRCD LOSSY SYNSIS AND NWORK OPIMIZAION Karel ájek a), ratislav Michal, Jiří Sedláček a) Uiversity of Defece, Kouicova 65,63 00 Bro,Czech Republic, Bro Uiversity of echology, Kolejí
More informationGENERATE AND MEASURE STANDING SOUND WAVES IN KUNDT S TUBE.
Acoustics Wavelegth ad speed of soud Speed of Soud i Air GENERATE AND MEASURE STANDING SOUND WAVES IN KUNDT S TUBE. Geerate stadig waves i Kudt s tube with both eds closed off. Measure the fudametal frequecy
More informationExperimental Noise Analysis of Reed Switch Sensor Signal under Environmental Vibration
Computer Techology ad Applicatio 7 (16) 96-1 doi: 1.1765/1934-733/16..4 D DAVID PUBLISHING Experimetal Noise Aalysis of Reed Switch Sesor Sigal uder Evirometal Vibratio Odgerel Ayurzaa 1 ad Hiesik Kim
More informationDelta- Sigma Modulator based Discrete Data Multiplier with Digital Output
K.Diwakar et al. / Iteratioal Joural of Egieerig ad echology (IJE Delta- Sigma Mulator based Discrete Data Multiplier with Digital Output K.Diwakar #,.ioth Kumar *2, B.Aitha #3, K.Kalaiarasa #4 # Departmet
More informationx y z HD(x, y) + HD(y, z) HD(x, z)
Massachusetts Istitute of Techology Departmet of Electrical Egieerig ad Computer Sciece 6.02 Solutios to Chapter 5 Updated: February 16, 2012 Please sed iformatio about errors or omissios to hari; questios
More informationA New Space-Repetition Code Based on One Bit Feedback Compared to Alamouti Space-Time Code
Proceedigs of the 4th WSEAS It. Coferece o Electromagetics, Wireless ad Optical Commuicatios, Veice, Italy, November 0-, 006 107 A New Space-Repetitio Code Based o Oe Bit Feedback Compared to Alamouti
More informationA SIMPLE METHOD OF GOAL DIRECTED LOSSY SYNTHESIS AND NETWORK OPTIMIZATION
49 A SIMPL MOD OF GOAL DIRCD LOSSY SYNSIS AND NWORK OPIMIZAION K. ájek a),. Michal b), J. Sedláek b), M. Steibauer b) a) Uiversity of Defece, Kouicova 65,63 00 ro,czech Republic, b) ro Uiversity of echology,
More informationChapter 1 The Design of Passive Intermodulation Test System Applied in LTE 2600
Chapter The Desig of Passive Itermodulatio Test System Applied i LTE 600 Gogli, Wag Cheghua, You Wejue 3, Wa Yuqiag 4 Abstract. For the purpose of measurig the passive itermodulatio (PIM) products caused
More informationTechnical Explanation for Counters
Techical Explaatio for ers CSM_er_TG_E Itroductio What Is a er? A er is a device that couts the umber of objects or the umber of operatios. It is called a er because it couts the umber of ON/OFF sigals
More informationSELECTION AND CONNECTION OF SPRING APPLIED FAILSAFE AND PERMENANT MAGNET BRAKES
Ck85/06/ 70 Samatha Str SELECTION AND CONNECTION OF SPRING APPLIED FAILSAFE AND PERMENANT MAGNET BRAKES. OPERATING CONDITIONS. Normal Operatig Coditios The ambiet temperature must ot exceed 40 C ad its
More informationAME50461 SERIES EMI FILTER HYBRID-HIGH RELIABILITY
PD-94595A AME5046 SERIES EMI FILTER HYBRID-HIGH RELIABILITY Descriptio The AME Series of EMI filters have bee desiged to provide full compliace with the iput lie reflected ripple curret requiremet specified
More informationImprovement of Commutation Time in Matrix Converter
Iteratioal Joural of Scietific & Egieerig Research Volume 3, Issue 6, Jue-01 1 ISSN 9-5518 Improvemet of Commutatio Time i Matrix Coverter Idrajit Sarkar, Sumata Kumar Show, Prasid Syam Abstract Matrix
More informationX-Bar and S-Squared Charts
STATGRAPHICS Rev. 7/4/009 X-Bar ad S-Squared Charts Summary The X-Bar ad S-Squared Charts procedure creates cotrol charts for a sigle umeric variable where the data have bee collected i subgroups. It creates
More information信號與系統 Signals and Systems
Sprig 2 信號與系統 Sigals ad Systems Chapter SS- Sigals ad Systems Feg-Li Lia NTU-EE Feb Ju Figures ad images used i these lecture otes are adopted from Sigals & Systems by Ala V. Oppeheim ad Ala S. Willsky,
More informationPRACTICAL FILTER DESIGN & IMPLEMENTATION LAB
1 of 7 PRACTICAL FILTER DESIGN & IMPLEMENTATION LAB BEFORE YOU BEGIN PREREQUISITE LABS Itroductio to Oscilloscope Itroductio to Arbitrary/Fuctio Geerator EXPECTED KNOWLEDGE Uderstadig of LTI systems. Laplace
More informationA Novel Harmonic Elimination Approach in Three-Phase Multi-Motor Drives
Dowloaded from vb.aau.dk o: marts 7, 019 Aalborg Uiversitet A Novel Harmoic Elimiatio Approach i Three-Phase Multi-Motor Drives Davari, Pooya; Yag, Yogheg; Zare, Firuz; Blaabjerg, Frede Published i: Proceedigs
More informationSpread Spectrum Signal for Digital Communications
Wireless Iformatio Trasmissio System Lab. Spread Spectrum Sigal for Digital Commuicatios Istitute of Commuicatios Egieerig Natioal Su Yat-se Uiversity Spread Spectrum Commuicatios Defiitio: The trasmitted
More informationThe Detection of Abrupt Changes in Fatigue Data by Using Cumulative Sum (CUSUM) Method
Proceedigs of the th WSEAS Iteratioal Coferece o APPLIED ad THEORETICAL MECHANICS (MECHANICS '8) The Detectio of Abrupt Chages i Fatigue Data by Usig Cumulative Sum (CUSUM) Method Z. M. NOPIAH, M.N.BAHARIN,
More informationA New Peak Detection Method for Single or Three-Phase Unbalanced Sinusoidal Signals
A New Peak Detectio Metod for Sigle or Tree-Pase Ubalaced Siusoidal Sigals Jusog Rim 1,3, Colyog Ri 1, Hogcol Ji 2, Colji Or 3, Colju Rim 3, Hyewo Ri 2 1. Departmet of Pysics, KimIlSug Uiversity, Pyogyag,
More informationMassachusetts Institute of Technology Dept. of Electrical Engineering and Computer Science Fall Semester, Introduction to EECS 2.
Massachusetts Istitute of Techology Dept. of Electrical Egieerig ad Computer Sciece Fall Semester, 006 6.08 Itroductio to EECS Prelab Exercises Pre-Lab#3 Modulatio, demodulatio, ad filterig are itegral
More informationBy: Pinank Shah. Date : 03/22/2006
By: Piak Shah Date : 03/22/2006 What is Strai? What is Strai Gauge? Operatio of Strai Gauge Grid Patters Strai Gauge Istallatio Wheatstoe bridge Istrumetatio Amplifier Embedded system ad Strai Gauge Strai
More informationECE 333: Introduction to Communication Networks Fall Lecture 4: Physical layer II
ECE 333: Itroductio to Commuicatio Networks Fall 22 Lecture : Physical layer II Impairmets - distortio, oise Fudametal limits Examples Notes: his lecture cotiues the discussio of the physical layer. Recall,
More informationBANDWIDTH AND GAIN ENHANCEMENT OF MULTIBAND FRACTAL ANTENNA BASED ON THE SIERPINSKI CARPET GEOMETRY
ISSN: 2229-6948(ONLINE) DOI: 10.21917/ijct.2013.0095 ICTACT JOURNAL ON COMMUNICATION TECHNOLOGY, MARCH 2013, VOLUME: 04, ISSUE: 01 BANDWIDTH AND GAIN ENHANCEMENT OF MULTIBAND FRACTAL ANTENNA BASED ON THE
More informationData Acquisition System for Electric Vehicle s Driving Motor Test Bench Based on VC++ *
Available olie at www.sciecedirect.com Physics Procedia 33 (0 ) 75 73 0 Iteratioal Coferece o Medical Physics ad Biomedical Egieerig Data Acquisitio System for Electric Vehicle s Drivig Motor Test Bech
More information信號與系統 Signals and Systems
Sprig 24 信號與系統 Sigals ad Systems Chapter SS- Sigals ad Systems Feg-Li Lia NTU-EE Feb4 Ju4 Figures ad images used i these lecture otes are adopted from Sigals & Systems by Ala V. Oppeheim ad Ala S. Willsky,
More informationR. W. Erickson. Department of Electrical, Computer, and Energy Engineering University of Colorado, Boulder
R. W. Erickso Departmet of Electrical, Computer, ad Eergy Egieerig Uiversity of Colorado, Boulder Specific o-resistace R o as a fuctio of breakdow voltage V B Majority-carrier device: AARR #$ = kk μμ $
More informationRadar emitter recognition method based on AdaBoost and decision tree Tang Xiaojing1, a, Chen Weigao1 and Zhu Weigang1 1
Advaces i Egieerig Research, volume 8 d Iteratioal Coferece o Automatio, Mechaical Cotrol ad Computatioal Egieerig (AMCCE 7) Radar emitter recogitio method based o AdaBoost ad decisio tree Tag Xiaojig,
More informationAnalysis of SDR GNSS Using MATLAB
Iteratioal Joural of Computer Techology ad Electroics Egieerig (IJCTEE) Volume 5, Issue 3, Jue 2015 Aalysis of SDR GNSS Usig MATLAB Abstract This paper explais a software defied radio global avigatio satellite
More informationSuper J-MOS Low Power Loss Superjunction MOSFETs
Low Power Loss Superjuctio MOSFETs Takahiro Tamura Mutsumi Sawada Takayuki Shimato ABSTRACT Fuji Electric has developed superjuctio MOSFETs with a optimized surface desig that delivers lower switchig.
More informationCOMPRESSION OF TRANSMULTIPLEXED ACOUSTIC SIGNALS
COMPRESSION OF TRANSMULTIPLEXED ACOUSTIC SIGNALS Mariusz Ziółko, Przemysław Sypka ad Bartosz Ziółko Departmet of Electroics, AGH Uiversity of Sciece ad Techology, al. Mickiewicza 3, 3-59 Kraków, Polad,
More informationResearch Article Modeling and Analysis of Cascade Multilevel DC-DC Boost Converter Topologies Based on H-bridge Switched Inductor
Research Joural of Applied Scieces, Egieerig ad Techology 9(3): 45-57, 205 DOI:0.9026/rjaset.9.389 ISSN: 2040-7459; e-issn: 2040-7467 205 Maxwell Scietific Publicatio Corp. Submitted: September 25, 204
More informationAME28461 SERIES EMI FILTER HYBRID-HIGH RELIABILITY
PD-94597A AME28461 SERIES EMI FILTER HYBRID-HIGH RELIABILITY Descriptio The AME Series of EMI filters have bee desiged to provide full compliace with the iput lie reflected ripple curret requiremet specified
More informationCounting on r-fibonacci Numbers
Claremot Colleges Scholarship @ Claremot All HMC Faculty Publicatios ad Research HMC Faculty Scholarship 5-1-2015 Coutig o r-fiboacci Numbers Arthur Bejami Harvey Mudd College Curtis Heberle Harvey Mudd
More informationOutline. Motivation. Analog Functional Testing in Mixed-Signal Systems. Motivation and Background. Built-In Self-Test Architecture
Aalog Fuctioal Testig i Mixed-Sigal s Jie Qi Dept. of Electrical & Computer Egieerig Aubur Uiversity Co-Advisors: Charles Stroud ad Foster Dai Outlie Motivatio ad Backgroud Built-I Self-Test Architecture
More informationAnalysis, design and implementation of a residential inductive contactless energy transfer system with multiple mobile clamps
Aalysis, desig ad implemetatio of a residetial iductive cotactless eergy trasfer system with multiple mobile clamps Arash Momeeh 1, Miguel Castilla 1, Mohammad Moradi Ghahderijai 1, Jaume Miret 1, Luis
More informationOptimal C-type Filter for Harmonics Mitigation and Resonance Damping in Industrial Distribution Systems
Optimal C-type Filter for Harmoics Mitigatio ad Resoace Dampig i Idustrial Distributio Systems Shady H. E. Abdel Aleem 1, Ahmed F. Zobaa 2 1 15 th of May Higher Istitute of Egieerig, Mathematical, Physical,
More informationTehrani N Journal of Scientific and Engineering Research, 2018, 5(7):1-7
Available olie www.jsaer.com, 2018, 5(7):1-7 Research Article ISSN: 2394-2630 CODEN(USA): JSERBR 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
More information4. INTERSYMBOL INTERFERENCE
DATA COMMUNICATIONS 59 4. INTERSYMBOL INTERFERENCE 4.1 OBJECT The effects of restricted badwidth i basebad data trasmissio will be studied. Measuremets relative to itersymbol iterferece, usig the eye patter
More informationA study on the efficient compression algorithm of the voice/data integrated multiplexer
A study o the efficiet compressio algorithm of the voice/data itegrated multiplexer Gyou-Yo CHO' ad Dog-Ho CHO' * Dept. of Computer Egieerig. KyiigHee Uiv. Kiheugup Yogiku Kyuggido, KOREA 449-71 PHONE
More informationTotal Harmonics Distortion Reduction Using Adaptive, Weiner, and Kalman Filters
Wester Michiga Uiversity ScholarWorks at WMU Master's Theses Graduate College 6-2016 Total Harmoics Distortio Reductio Usig Adaptive, Weier, ad Kalma Filters Liqaa Alhafadhi Wester Michiga Uiversity, liquaa.alhafadhi@yahoo.com
More informationA GHz Constant KVCO Low Phase Noise LC-VCO and an Optimized Automatic Frequency Calibrator Applied in PLL Frequency Synthesizer
A 4.6-5.6 GHz Costat KVCO Low Phase Noise LC-VCO ad a Optimized Automatic Frequecy Calibrator Applied i PLL Frequecy Sythesizer Hogguag Zhag, Pa Xue, Zhiliag Hog State Key Laboratory of ASIC & System Fuda
More informationVilnius Gediminas Technical University Naugarduko 41, LT-03227, Vilnius, Lithuania
METHODS OF STRAIN MEASUREMENTS IN CONSTRUCTION MONITORING SYSTEMS Vygaudas Kvedaras Vilius Gedimias Techical Uiversity Naugarduko 41, LT-03227, Vilius, Lithuaia vygaudas.kvedaras@el.vgtu.lt Rokas Kvedaras
More informationIndicator No mark Single preset Dual preset DIN W144 H72mm DIN W48 H96mm No mark DIN W72 H72mm (4 digit) (6 digit) Counter/Timer
FX/FX/FX Series DIN W7 7, W8 96, W 7mm er/timer Features 6 iput modes ad output modes ig speed: cps/cps/kcps/kcps Selectable voltage iput (PNP) or No voltage iput (NPN) dditio of Up/Dow iput mode Wide
More informationTHE LUCAS TRIANGLE RECOUNTED. Arthur T. Benjamin Dept. of Mathematics, Harvey Mudd College, Claremont, CA Introduction
THE LUCAS TRIANLE RECOUNTED Arthur T Bejami Dept of Mathematics, Harvey Mudd College, Claremot, CA 91711 bejami@hmcedu 1 Itroductio I 2], Neville Robbis explores may properties of the Lucas triagle, a
More informationA Series Compensation Technique for Enhancement of Power Quality Isolated Power System Venkateshwara Rao R K.Satish Babu
A Series Compesatio Techique for Ehacemet of Power Quality Isolated Power System ekateshwara Rao R K.Satish Babu PG Studet [P.E], Dept of EEE, DR & DR. H S MIC College of Tech, A.P, Idia Assistat Professor,
More informationx 1 + x x n n = x 1 x 2 + x x n n = x 2 x 3 + x x n n = x 3 x 5 + x x n = x n
Sectio 6 7A Samplig Distributio of the Sample Meas To Create a Samplig Distributio of the Sample Meas take every possible sample of size from the distributio of x values ad the fid the mea of each sample
More informationECE 2201 PRELAB 4A MOSFET SWITCHING APPLICATIONS. Digital CMOS Logic Inverter
ECE 2201 PRELAB 4A MOSFET SWITCHING APPLICATIONS Digital CMOS Logic Iverter Had Aalysis P1. I the circuit of Fig. P41, estimate the roagatio delays t PLH ad t PHL usig the resistive switch model for each
More informationRoberto s Notes on Infinite Series Chapter 1: Series Section 2. Infinite series
Roberto s Notes o Ifiite Series Chapter : Series Sectio Ifiite series What you eed to ow already: What sequeces are. Basic termiology ad otatio for sequeces. What you ca lear here: What a ifiite series
More informationA Wide-Beam Broadcasting Antenna Using a Curved Dipole on Reflector Plane
1th WSEAS Iteratioal Coferece o COMMUNICATIONS, Heraklio, Greece, July 3-5, 8 A Wide-Beam Broadcastig Atea Usig a Curved Dipole o Reflector Plae RANGSAN WONGSAN School of Telecommuicatio Egieerig, Istitute
More informationINF 5460 Electronic noise Estimates and countermeasures. Lecture 11 (Mot 8) Sensors Practical examples
IF 5460 Electroic oise Estimates ad coutermeasures Lecture 11 (Mot 8) Sesors Practical examples Six models are preseted that "ca be geeralized to cover all types of sesors." amig: Sesor: All types Trasducer:
More informationAn Adaptive Image Denoising Method based on Thresholding
A Adaptive Image Deoisig Method based o Thresholdig HARI OM AND MANTOSH BISWAS Departmet of Computer Sciece & Egieerig Idia School of Mies, Dhabad Jharkad-86004 INDIA {hariom4idia, matoshb}@gmail.com Abstract
More informationMultisensor transducer based on a parallel fiber optic digital-to-analog converter
V Iteratioal Forum for Youg cietists "pace Egieerig" Multisesor trasducer based o a parallel fiber optic digital-to-aalog coverter Vladimir Grechishikov 1, Olga Teryaeva 1,*, ad Vyacheslav Aiev 1 1 amara
More informationA 5th order video band elliptic filter topology using OTRA based Fleischer Tow Biquad with MOS-C Realization
Natural ad Egieerig Scieces 44 olume 1, No. 2, 44-52, 2016 A 5th order video bad elliptic filter topology usig OTA based Fleischer Tow Biquad with MOS-C ealiatio Ahmet Gökçe 1*, Uğur Çam 2 1 Faculty of
More informationElectromechanical Oscillations Influence to Iductance of Arc Furnace Second Circuit
Iteratioal Scietific Collouium Modellig for Electromagetic Processig Haover, March 4-6, 3 Electromechaical Oscillatios Ifluece to Iductace of Arc Furace Secod Circuit V.S. Cheredicheko, A.I. Aliferov,
More informationPermutation Enumeration
RMT 2012 Power Roud Rubric February 18, 2012 Permutatio Eumeratio 1 (a List all permutatios of {1, 2, 3} (b Give a expressio for the umber of permutatios of {1, 2, 3,, } i terms of Compute the umber for
More information