Electron ic pole changing techn ique of multi2phase induction motor

Transcription

1 EL ECTR ICMACH IN ESANDCON TROL Vol3 No3 May 9,,,,,, (., 37;., 33) :,,,,,, 939,, : ; ; ; : TM3 : A : 7-449X (9) Electron ic pole changing techn ique of multiphase induction motor YANG J iaqiang, HUANG J in, KANGM in,, CHEN Gao, L IU Dong, J IANG Haibo (. College of Electrical Engineering, Zhejiang University, Hangzhou 37, China;. School of Automation and Electrical Engineering, Zhejiang University of Science and Technology, Hangzhou 37, China) Abstract: For constantpower speed regulation, the operational range of traditional induction motor drive system is lim ited. To solve this p roblem, electronic pole changing of multiphase induction motor is p ro posed to realize w ide constantpower range speed regulation. B ased on the concep t of multip le control freedom, in a multiphase motor, harmonics currents p roduce magnetic fields w ith different pole pair num ber, which are controlled in different orthogonal p lanes by slip frequency control to realize electronic pole changing w ithout cutting off the power. Polechanging experim ents for a 9 phase induction motor is p res ented. The experim ental results verify that it is feasible for multiphase induction motor to realize pole - changing w ithout cutting off the power and the method p roposed could effectively extend the operational range of multiphase motor. Key words:multiphase AC drive; pole changing; multiphase induction motors; multip le control freedom,,,, : : (56776) ; (7) ;(8C - ; 8C63) : (97 - ),,,,; (96 - ),,,,, ; (98 - ),,,,; (986 - ),,,; (983 - ),,,; (987 - ),,, China Academic Journal Electronic Publishing House. All rights reserved.

2 3 33,,,,,,,, ;,, [ ],,,,, PWM,; [ ], [ 3, 4 ],,,, [ 5 ],,, [ 6 ] Y,,,,, np,,, C [ 7, 8 ] C = n cos cos cos3 cos(n - ) sin sin sin3 sin (n - ) cos3 cos6 cos9 cos3 (n - ) sin3 sin6 sin9 sin3 (n - ) cosmcosmcos3mcos(n - )m, sinmsinmsin3msin (n - )m () := / n n, m = ( n - ) /;n, m = ( n - ) /, q d, 3 4q d,,, / n q d, (), q d, 3 4 q d,, m, m m,,,, ( n5), n q d, ( n - ),,/3, /3,, 4/3, 5/3,, ( a) ; q d,, /3, 4/3,, /3, 6/3,, ( b) np, n,, P P m P,, China Academic Journal Electronic Publishing House. All rights reserved.

3 34 3,, u q3 s u d3 s = R s +L 3s p 3 L 3s L 3m p L 3m - 3 L 3s R s +L 3s p - 3 L 3m L 3m p L 3m p 3(- r )L 3m R 3r +L 3r p 3(- r )L 3r - 3(- r )L m L 3m p - 3(- r )L 3r R 3r +L 3r p F ig. Rota ting magnetic f ield schema 3 3 U s = R s I s U r R r I r + d dt L s L sr L rs L r I s I r, () : U I R L,; s r, sr (), qd,, qd, d q u q s u d s = R s +L s p L s L m p L m - L s R s +L s p - L m L m p L m p (- r )L m R r +L r p (- r )L r - (- r )L m L m p - (- r )L r R r +L r p i qs i ds i qr i dr China Academic Journal Electronic Publishing House. All rights reserved. (3) T e = PL m ( i q s i d r - i q r i d s ) (4) : p, L s = L m + L s, L r = L m + L r ; u q s u d s q d ; i q s i d s i q r i d r q d ; L m L s L r ; R s R r q d ; r d q ; T e ; P 3 q 3 d 3 i q3s i d3s i q3r i d3r, (5) T e3 = 3PL 3m ( i q3 s i d3 r - i q3 r i d3 s ) (6) : L 3 s = L 3m + L s3, L 3 r = L 3m + L r3 ; u q3 s u d3 s 3q d ; i q3 s i d3 s i q3 r i d3 r 3 q d ; L 3m L s3 L r3 3 ; R s R r3 3 ; T e d 5 q 5 d 7 q 7,, 9 4 3,93 39, (3)(5), 9 3 ( q d )9 ( q 3 d 3 ), I 3, I, 3 ;I 3 9, 3 I 3,9, 9 9, I I 3,39 9,3, Y 9, 3 3,, 3

4 3 35,P I 3 s : 3 s = 3 s +, u / f SPWM U U 3 s 3 s SPWM M sin ( 3 s t) M cos( 3 s t) +, (7) t ona t 3onb cos6/9 sin6/9 t 3onc cos/9 sin/9 t 3ond t 3one t 3onf = T s cos6/9 cos/9 sin6/9 sin/9 t 3ong t 3onh t 3oni cos6/9 sin6/9 cos/9 sin/9,94 qd,4,, qd q d SPWM 3, q 3 d 3 SPWM 9, SPWM3 9, 39 ; SPWM t ona t onb t onc t ond t one t onf t ong t onh t oni = T s cos/9 cos4/9 cos6/9 cos8/9 cos/9 cos/9 cos4/9 cos6/9 sin/9 sin4/9 sin6/9 sin8/9 sin/9 sin/9 sin4/9 sin6/9 M sin (3 3 s t) + M cos(3 3 s t) (8) T s, M, [ t ona t onb t onc t ond t one t onf t ong t onh t oni ] T, [ t 3ona t 3onb t 3onc t 3ond t 3one t 3onf t 3ong t 3onh t 3oni ] T 939 SPWM 4, TMS3F8335 DSP 9 P N = 5 kw, T n = 3 N m, U n = V, I n = 75 A, P N = 3, f = 5 Hz 4 r/m in9 3 a, ;,, China Academic Journal Electronic Publishing House. All rights reserved.

5 36 3, 3, : ;, ;,,, 493 F ig. 4Speed and pha se curren t waveform of 9 pole pa ir chage to 3 pole pa ir 5 r/m in39 a,,,;,, 3 9,,, F ig. 5Speed and pha se curren t waveform of 3 pole pa ir chage to 9 pole pa ir,9 39, 9, 3, 5 : [ ],. [ J ]., 995, 6: 5-6. [ ],. [ J ].,, 7 (4) : 49-5, 5. WAN W enbin, TANG Renyuan. An effect method of enhancing the fluxweakening ratio of permanent magnet synchronous motor [ J ]. Transactions of China Electrotechnical Society,, 7 ( 4) : 49-5, 5. [ 3 ] SWAMY M, KUME T J, MAEMURA A, et al. Extended high speed operation via electronic winding change method for ac motors [ C ] / /4 39 th IAS Annual Industry Applications Conference, October 3-7, 4, Seattle, USA, 4, : [ 4 ] KUME T, SWAMYM, SAWAMURA M, et al. A quick transition electronic winding changeover technique for extended speed ranges [ C ] / /4 IEEE 35 th Annual Power Electronics Specialists Con ference, June - 5, 4, Aachen, German, 4, 5: [ 5 ]. - /3 [ J ]., 4, 4 (3) : - 5. Q IAN Luofen. A new commutatingmethod for change pole to elec tric machine /3changepole [ J ]. Proceedings of the CSEE, 4, 4 (3) : - 5. [ 6 ] OSAMA M, L IPO T A. A new inverter control scheme for induc tion motor drives requiring wide speed range [ J ]. IEEE Transac tions on Industry Applications, 996, 3 (4) : [ 7 ]. P N [ J ]., 994, 4 (5) : - 7. HUANG Jin. Application of ppair poles nphase transformation in the analysis of synchronous machines with stator winding fault [ J ]. Proceedings of the CSEE, 994, 4 (5) : - 7. [ 8 ],,. [ J ]. (), 7, 4 () : HUANG Jin, KANGM in, YANG Jiaqiang. Novel bearinglessma chine with a single set of multiphase windings[ J ]. Journal of Zhe jiang University ( Engineering Science), 7, 4 ( ) : ( :) China Academic Journal Electronic Publishing House. All rights reserved.