Perf ormance analysis of t wo2stage matrix converter driven asynchronous motor

Transcription

1 ( ) J. CENT. SOUTH UNIV. ( SCIENCE AND TECHNOLOGY) Vol. 36 No1 4 Aug , 2, 1, 1 (1.,, ,,411105) :, MA TLAB/ SIMUL IN K,,,, : PWM : TM311 :A : (2005) Perf ormance analysis of t wo2stage matrix converter driven asynchronous motor SU Mei 1, XU Xin2dong 2, L I Dan2yun 1, ZHAN G Tai2shan 1 (1. School of Information Science and Engineering, Central South University, Changsha , China 2. School of Information Engineering, Xiangtan University, Xiangtan , China) Abstract : The feat ures of the two2stage matrix converter topology were analysed, and then t he p ulse2widt h modulation strategy for t he rectifier side and t he space vector p ulse widt h modulation strategy for t he inverter side were deduced. And t he principle of zero current commutation was elaborated. The simulating model of t he two2stage matrix converter was set up under MA TL AB/ SIMUL IN K. In order to investigate the starting2up and running process in AC frequency conver2 sion for asynchronous motor, a lot of simulation researches were carried out. Simulation result s demonstrate that t he inp ut current is sinusoidal inp ut and in p hase wit h t he inp ut voltage and t he major component of outp ut voltage is t he f undamental component, which verify t he correct ness and availability of t he propo sed strategies and excellent performance of the two2stage matrix con2 verter. Key words : t wo2stage mat rix co nverter p ulse widt h mo dulatio n rectificatio n zero current commutation space vector modulation asynchronous motor,,, [1 ], ( PWM) 20 80,, [2 5 ], ( 18 IGB T 18 ) [6,7 ] : : : ( ),,,,, :,, : (O) E2mail : com. cn

2 4, : 956,,,,,, 2 Sap, S bp, Scp, San, S bn Scn, S up, Svp, Swp, S un, S vn Swn IGB T 1 1 2, 15 IGB T 18,,, [8 ] 1 Dc Cc 1 15 Fig switch topology of two2stage matrix coverter, PWM AC/ DC/ AC,, PWM, SV PWM,,,,,,, [9 ], 2/ 3,, 2, Fig. 2 Two2stage matrix coverter with clamp circuit : V sa V sb V sc V mco s ( i t) V mco s ( it - 2 / 3) V mco s ( i t - 4 / 3) : isu isv isw Io cos ( o t + o ) Io cos ( o t + o - 2 / 3) Io cos ( o t + o - 4 / 3) V m V mcos b (1) V mcos c Io cos oa Io cos ob Io cos oc (2) : i o o V m Io 2. 1 PWM PWM,, 2, Lf 0, Cf 0 V pn > 0,, PWM, 60 1,1 6,, ( 3) 3 1,V sa,v sb V sc, V sa, V sb V sc PWM, 2 : 1 Sap S bn,, V pn V sa - V sb 2 Sap Scn,,

3 066 V pn V sa - V sc ( ) 36 isc - dcgi (7) gv db (V sa - V sb) + dc (V sa - V sc) (8), (5), (6), (7) (1) (3) : db - cos b (9) dc - cos c (10) (9) (10) (8) : 3 Fig. 3 Intervals of rectifier PWM Table 1 Switching sequence of PWM rectifier S ap, S bn V sa - V sb Sap,S cn V sa - V sc 2 Scn, S ap V sa - V sc S cn, S bp V sb - V sc 3 S bp, S cn V sb - V sc S bp, San V sb - V sa 4 San, S bp V sb - V sa San,S cp V sc - V sa 5 Scp, S an V sc - V sa S cp, S bn V sc - V sb 6 S bn, Scp V sc - V sb S bn, Sap V sa - V sb,,,, : V sa isa V sb isb V sc isc R (3) PWM, 1 PWM Ts, ( ) gi, gv 1, 1, PWM, Sap, S bn Scn, a, b c db dc S bn Scn PWM, db + dc 1 (4) gi isa ( db + dc) gi - ( isb + isc) (5) isb - dbgi (6) 3V m gv (11) 2 (11), 1 gv, 1 PWM,, 1. 5V m 3V m, 2. 2, : VoL mv (3Vm/ 2) 0 (12) :VoL Vsu + V sv e 2 / 3 + Vsw e - 2 / 3 o mv 8 8 [10 ] 4, , 1,, (12), VoL 2 V,V V0, : d T / Ts mv cos in sin (60 - sv ) d T / Ts mv co s in sin sv d0 T0v/ Ts 1 - d - d (13) : mv, 0 mv 1 sv Ts T, T T0v d, d d0 2,, 2 (13) 4 V1,V2 Vo, 2 1, a. 1 1, V1, V2

4 4, : 166 Vo :,,,, 5 1 PWM Fig. 5 Inverter PWM sequence in section whlie rectifier in interval 3 (a) (b) 4 Fig. 4 Voltage space vector and its composition diagram d1b d1 db d1 - cos b d2b d2 db d2 - cos b dob do db do - cos b (14) b. 2, V1,V2 Vo : d1c d1 dc d1 - cos c d2c d2 dc d2 - cos c doc do dc do - cos c (15), 5 PWM, MA TL AB/ SIMUL IN K, s, 4 : ( ) ( ) ode15, 10 k Hz,, MA TL AB6. 5 : a., 220 V/ 50 Hz, Rs 0. 2 Lf 1 m H, Cf 10 F 1 b W 220 V/ 60 Hz m H m H ( ) m H kg m 2, M N/ m 6,

5 266 ( ) 36 7 (a) (b) (c) 6 Fig. 6 Simulation waveforms of output phase current, speed and electromagnetic torque of an induction motor in start2up process (a) (b) FF T (c) (d) FF T 8 Fig. 8 Harmonic analysis of input/ output voltage and current 4 1 isa 2 V sa (a) (b) (c) (d) 7 Fig. 7 Simulation waveforms at stable state, 1, V, 8 FF T,,,, a., PWM, b., c. d. ( ),,,, : [1 ],. [J ].

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