Simulation of Inverter Fed Induction Motor Drive with LabVIEW

Transcription

1 Wold Academy of Science, Engineeing and Technology Intenational Jounal of Electical and Compute Engineeing Vol:8, No:, 204 Simulation of Invete Fed Induction Moto Dive with LabVIEW R. Gunabalan, S. Immanuel Pabakaan, J. Reegan, S. Ganesh Intenational Science Index, Electical and Compute Engineeing Vol:8, No:, 204 waset.og/publication/ Abstact This pape descibes a softwae appoach fo modeling invete fed induction moto dive using Laboatoy Vitual Instument Engineeing Wokbench (LabVIEW). The eason behind the selection of LabVIEW softwae is because of its stong gaphical inteface, flexibility of its pogamming language combined with built-in tools designed specifically fo test, measuement and contol. LabVIEW is geneally used in most of the applications fo data acquisition, test and contol. In this pape, invete and induction moto ae modeled using LabVIEW toolkits. Simulation esults ae pesented and ae validated. Keywods Induction moto, LabVIEW, State model. M I. INTRODUCTION ATHEMATICAL models of electical machines ae used to lean about thei dynamic chaacteistics using simulation tools. With the advancement of compute technology, the dawbacks of conventional simulation methods become moe and moe obvious. With the apid gowth in compute hadwae and softwae techniques, new use fiendly simulation softwae packages ae now available. Putting vitual instuments softwae into mathematical modeling and analysis of electical machines will esult in not only the cost eduction of the hadwae but also the enhancement of the teaching o taining effect. The diect application of this sot of softwae dastically simplifies simulation pocedues fo seveal pacticing enginees. LabVIEW pogams ae called Vitual Instuments (VI) because thei appeaance and opeation imitate physical instuments, such as oscilloscopes and multi-metes. LabVIEW is a gaphical pogamming language fo data acquisition, analysis and pesentation. The components of LabVIEW ae font panel and block diagam. The font panel is built with contols and indicatos and the block diagam contains the pictoial epesentation of souce code. At pesent, LabVIEW simplifies the scientific computation, pocess contol, eseach, industial applications and measuement applications. MATLAB is a high pefomance language fo technical computing. It integates computation, visualization and pogamming in an easy-to-use envionment whee poblems and solutions ae expessed in familia mathematical notation. R. Gunabalan and S. Ganesh ae with the depatment of Electical and Electonics Engineeing, Chandy College of Engineeing, Thoothukudi, Anna Univesity, Chennai, TamilNadu, India. ( gunabalan@yahoo.co.in, gauti_ganeshs@yahoo.com) S. Immanuel Pabakaan and J. Reegan ae with the depatment of Electonics and Communication Engineeing, Chandy College of Engineeing, Thoothukudi, Anna Univesity, Chennai, TamilNadu, India. MATLAB simulink block sets ae widely used in simulation of all kind of systems. MATLAB was used fo simulation of vecto contol of induction moto and diffeent electic motos []-[9]. But Simulink lack the imitation of physical instuments o equipment in appeaance and opeation. Consideing the above, LabVIEW is used as a simulation tool to model invete fed induction moto dive. Field oiented contol of induction moto dive using LabVIEW was discussed in [0] but simulation esults wee not explained clealy. LabVIEW was used to simulate and find the chaacteistics of synchonous geneato [] but the speed-toque chaacteistics wee not explained. LabVIEW was used to identify the induction moto paamete [2], automatic testing fo DC moto of potable washing machine [3], hamonic measuement [4], speed contol of steppe moto [5], fault diagnosis of induction moto [6]-[7], etc. modeling of invete and induction moto using LabVIEW is not discussed in liteatue. In this pape, LABVIEW is used as a simulation tool to model the invete and induction moto. The induction moto state equations ae constucted in LabVIEW envionment using contol design and simulation toolkit, mathscipt node and simple VIs. Invete is constucted using simple VIs. The pape is oganized as follows: Chapte II discusses the invete model in LabVIEW. The state space model of induction moto and esults ae discussed in Chapte III. Finally it is concluded in Chapte IV. II. INVERTER MODEL Voltage fed invete eceives DC voltage at one side and convet it to AC voltage. The AC voltage and fequency may be vaiable o constant depending on the application. Voltage fed invete is used extensively fo AC moto dive, induction heating, UPS etc. In voltage fed invetes, tansisto family devices ae geneally pefeed because of self commutation and high switching fequency. When a new convete cicuit is developed, o a contol stategy of a convete o dive system is fomulated, it is often convenient to study the system pefomance by simulation befoe building the beadboad o pototype. The simulation not only validates the system s opeation, but also pemits optimization of the system s pefomance. Besides contol and cicuit paametes, the plant paamete vaiation effect can be studied. Fig. shows the simple simulation block diagam fo a thee-phase, two-level PWM invete. Each leg of the invete is epesented by a switch which has thee input teminals and one output teminal. Intenational Scholaly and Scientific Reseach & Innovation 8() schola.waset.og/ /

2 Wold Academy of Science, Engineeing and Technology Intenational Jounal of Electical and Compute Engineeing Vol:8, No:, 204 Intenational Science Index, Electical and Compute Engineeing Vol:8, No:, 204 waset.og/publication/ The output of a switch (V a0, V b0 o V c0 ) is connected to the uppe input teminal (+0.5 V d ) if the PWM contol signal (middle input) is positive. Othewise, the output is connected to the lowe input teminal (-0.5 V d). The output o V a0 voltage thus oscillates between +0.5V d and -0.5V d, which is chaacteistics of a pole of an invete. The output phase voltages ae constucted by the following equations: V an =2/3V a0 -/3 V b0 V c0 () V bn =2/3V b0 -/3 V a0 V c0 (2) V cn =2/3V c0 -/3 V a0 V b0 (3) V ab = V an -V bn (4) V bc =V bn -V cn (5) V ca =V cn -V an (6) Fig. Block diagam codes fo modeling of invete III. INDUCTION MOTOR MODEL State space equations ae used to solve linea and non linea system equations. In state space epesentations, any n th ode diffeential equations descibing a contol system could be educed to n st ode equations. These equations ae aanged in the fom of matix equations to find the solution easily using softwae tools. This method is named as the state vaiable method. The selection of state vaiables depends upon the system stuctue and the goals of study. The state vaiables chosen fo induction moto ae stato cuents and oto fluxes. Toque is calculated fom the state vaiables and moto paametes. The continuous state space epesentation of the induction moto is as follows: The state vaiables ae d and q-axes stato cuents and oto fluxes. 2 L m LR s + τ Lm Lm iɺ ω ds = ids +ω eiqs + φd + φq + V (9) ds σll s σll s τ σll s σl s 2 L m L Rs + τ Lm Lm iɺ ω (0) qs = ( ωe ids ) iqs φd + φq + Vqs σl sl σll s σll s τ σl s ɺ Lm φ d = i ds φ d + ( ω e ω ) φ () q τ τ ɺ Lm φ q = i qs ( ω e ω ) φ d φ (2) q τ τ Speed is calculated fom the esultant stato cuents and oto fluxes. The equation fo oto speed is given by 3 nplm ω ɺ = ( φdiqs φqids ) T (3) L 2 JL J The above state equations ae constucted in LabVIEW using mathscipt node inside the simulation loop. Steps:. Contol and simulation loop is ceated 2. Mathscipt node is constucted inside the simulation loop. 3. Fist ode diffeential equations ae witten inside the mathscipt node. 4. Integation is pefomed to find the diffeent state vaiables. 5. By using simple aithmetic VIs, the speed and toque ae calculated fom the stato voltages and cuents. 6. Thee phase stato voltages ae conveted into two phase quantities in fomula node. A pat of the block diagam codes famed in LabVIEW is shown in Fig. 2. The mathscipt node, simple aithmetic VIs and scope fo measuement ae illustated. Fig. 3 shows the speed and toque wavefoms ceated in the font panel using gaphical display. Initially the moto uns at no load speed. At t=2.5s, a load of 5 Nm is applied to the moto. As the moto uns at open loop condition, speed of the moto deceases fom 497 pm to 480 pm. The dq-axes stato cuents and oto fluxes ae consideed as state vaiables. Fig. 4 shows the dqaxes stato phase cuents. The dq-axes oto fluxes ae shown in Fig. 5. The output of the invete contains hamonics. The dq-axes stato voltages ae depicted in Fig. 6. dx dt = AX + BU (7) Y = CX (8) Intenational Scholaly and Scientific Reseach & Innovation 8() schola.waset.og/ /

3 Wold Academy of Science, Engineeing and Technology Intenational Jounal of Electical and Compute Engineeing Vol:8, No:, 204 Intenational Science Index, Electical and Compute Engineeing Vol:8, No:, 204 waset.og/publication/ Fig. 2 Block diagam codes fo modeling of induction moto Fig. 3 Speed and toque wavefoms of induction moto Intenational Scholaly and Scientific Reseach & Innovation 8() schola.waset.og/ /

4 Wold Academy of Science, Engineeing and Technology Intenational Jounal of Electical and Compute Engineeing Vol:8, No:, 204 Fig. 4 dq axes stato phase cuents Intenational Science Index, Electical and Compute Engineeing Vol:8, No:, 204 waset.og/publication/ Fig. 5 dq axes oto fluxes Fig. 6 dq axes stato voltages Intenational Scholaly and Scientific Reseach & Innovation 8() schola.waset.og/ /

5 Wold Academy of Science, Engineeing and Technology Intenational Jounal of Electical and Compute Engineeing Vol:8, No:, 204 Intenational Science Index, Electical and Compute Engineeing Vol:8, No:, 204 waset.og/publication/ IV. CONCLUSION In this wok, the invete and induction moto ae modeled and simulated using LabVIEW. The models ae constucted using simple VIs and mathscipt node. To pove the effectiveness of the given method, simulation esults ae povided. REFERENCES [] G K. Matsuse, Y. Kouno, H. Kawai, J. Oikawa, Chaacteistics of speed senso-less vecto contolled dual induction moto dive connected in paallel fed by a single Invete, IEEE Tans. Ind. Appl., vol. 40, pp. 53-6, Jan./Feb [2] K. Matsuse, Y. Kouno, H. Kawai, S. Yokomizo, A Speed-senso-less vecto contol method of paallel-connected dual induction moto fed by a single invete, IEEE Tans. Ind. Appl., vol. 38, pp , Nov./Dec [3] H. Kubota K. Matsuse, Speed sensoless field-oiented contol of induction moto with oto esistance adaptation, IEEE Tans. Ind. Appl., vol. 30, pp , Sept. /Oct [4] H. Kubota, K. Matsuse, T. Nakano, DSP-Based Speed Adaptive Flux Obseve of Induction Moto, IEEE Tans. Ind. Appl., vol. 29, pp , Ma./Ap [5] Sidney R. Bowes, Ata Sevinc, Deick Holliday, New natual obseve applied to speed sensoless DC sevo and induction motos,, IEEE Tans. Ind. Appl., vol. 5, no.5, pp , Oct [6] Young-Real Kim, Seung-Ki Sul, Min-Ho Pak, Speed sensoless vecto contol of induction moto using Extended Kalman Filte, IEEE Tans. Ind. Appl., vol. 30, no. 5, pp , Sept. / Oct [7] Luigi Salvatoe, Silvio Stasi, Lea Tachioni, A new EKF-based algoithm fo flux estimation in induction machines, IEEE Tans. Ind. Electon., vol.40, no.5, pp , Oct.993. [8] Young-Real Kim, Seung-Ki Sul, Min-Ho Pak, Speed sensoless vecto contol of induction moto using Extended Kalman Filte, IEEE Tans. Ind. Appl., vol. 30, no. 5, pp , Sept. / Oct [9] Muat Baut, Seta Bogosyan, Metin Gokasan, Speed-sensoless estimation fo induction motos using Extended Kalman Filtes, IEEE Tans. Ind. Electon., vol. 54, no., pp , Feb [0] Tao Wu, Yi-Lim Chi, Yu Guo, Chao Xu, Simulation of FOC vecto contol of induction moto based on LabVIEW, Intenational confeence on infomation engineeing and compute science, IEEE, Dec [] M.Usama Suda, Synchonous geneato simulation using LabVIEW, Jounal of wold academic of science, engineeing and technology, vol.39, pp , [2] F. Filippetti, S.Piani, L.Tommasini, G. Fanceschini, A LabVIEW based vitual instument fo on line induction moto paamete identification, IEEE, pp [3] Chien-Lung Cheng, J.C.Yeh, S.C.Chen, Yi-Hung Lan, Automatic testing system based on LabVIEW fo DC moto of potable washing machine, Intenational Symposium on Ind. Electon., IEEE, pp , [4] Qiu Tang, Yaonan Wang, Siyu Guo, Design of powe system hamonic measuement system based on LabVIEW, Fouth intenational confeence on natual computation, IEEE, pp , [5] A.Shuqiu Gong, B.Binhe, LabVIEW based automatic ising and falling speed contol of steppe moto, Intenational confeence on electical machines and systems (ICEMS 2009). [6] Iahis Rodiguez, Robeto Alves, Victo Guzman, Analysis of ai gap flux to detect induction moto faults, Univesities powe engineeing confeence (UPEC 06), pp , Sept [7] R. Supangat, N. Etugul, W. L.Soong, D. A. Gay, C. Hansen, J. Giege, Boken oto ba fault detection in induction motos using stating cuent analysis, Euopean confeence on powe electonics and applications, He is having yeas of teaching expeience in vaious eputed institutions. He is cuently pusuing his PhD in Anna Univesity, Chennai, Tamilnadu, India. He is woking as an Assistant Pofesso in the depatment of Electical and Electonics Engineeing, Chandy College of Engineeing, Thoothukudi, Tamilnadu, India. He published 8 papes in national confeences, 8 papes in intenational confeences. He published 5 pape in intenational jounals. He is woking in the aea of sensoless vecto contol and DSP contol. M. R. Gunabalan is a life membe in ISTE. R. Gunabalan obtained his B.E. in Electical and Electonics Engineeing in Govenment College of Engineeing Tiunelveli, Manonmanium Sundaana Univesity, Tamilnadu, India, in 2000 and did his Maste of Technology (Electical Dives & Contol) in Pondichey Engineeing College, Pondichey Univesity, India, in Intenational Scholaly and Scientific Reseach & Innovation 8() schola.waset.og/ /