无刷直流电机抑制转矩脉动的方法研究
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摘要
由于无刷直流电机绕组存在电感,换相时电流无法突变,导致非换相电流存在波动,从而产生换相转矩脉动。提出一种新的电压补偿电路,由4个电力开关管,1个电力二极管,1个电容器组成。通过控制电力开关管导通和关断,在非换相期间,直流电压源对电容充电;在换相期间,直流电压源与电容串联,满足驱动电压等于4倍反电动势幅值,使得关断相电流下降速率与导通相电流上升速率一致,非换相电流波动降低,从而有效抑制换相转矩脉动。通过仿真验证了电压补偿电路能有效地抑制换相转矩脉动。
Because of the inductance in the winding of brushless DC motor,the current can′t change immediately,in the commutation period,which the non-commutation phase current ripple and commutation torque ripple areproduced. Presented a new voltage compensation circuit,which included 4 power switches,1 power diode and 1capacitor. By controlling power switches turned on and turned off,in the non-commutation period,the direct voltagesource charged to the capacitor,then,in the commutation period,the direct voltage source in series with the capacitor,made the driving voltage be equal to 4 times of the back EMF amplitude,which made the outing phase current fallingrate be equal to the incoming phase current rising rate,the non-commutation phase current ripple were reduced and socommutation torque ripple were suppressed. At last,the proposed method is confirmed by simulation in Matlab.
Because of the inductance in the winding of brushless DC motor,the current can′t change immediately,in the commutation period,which the non-commutation phase current ripple and commutation torque ripple areproduced. Presented a new voltage compensation circuit,which included 4 power switches,1 power diode and 1capacitor. By controlling power switches turned on and turned off,in the non-commutation period,the direct voltagesource charged to the capacitor,then,in the commutation period,the direct voltage source in series with the capacitor,made the driving voltage be equal to 4 times of the back EMF amplitude,which made the outing phase current fallingrate be equal to the incoming phase current rising rate,the non-commutation phase current ripple were reduced and socommutation torque ripple were suppressed. At last,the proposed method is confirmed by simulation in Matlab.
引文
[1]Xia Changliang,Wang Yingfa,Shi Tingna.Implementation ofFinite-state Model Predictive Control for Commutation TorqueRipple Minimization of Permanent-magnet Brushless DC Mo-tor[J].IEEE Trans.,2013,60(3):896-905.
[2]刘洋,赵金.一种无刷直流电机速度估计方法[J].电气传动,2015,45(1):10-13.
[3]陈冬,房建成.非理想梯形波反电势永磁无刷直流电机换相转矩脉动抑制方法[J].中国电机工程学报,2008,28(30):79-83.
[4]Renato Carlson.Analysis of Torque Ripple Due to Phase Com-mutation in Brushless DC Machines[J].IEEE Trans.,1992,28(3):632-638.
[5]Pragasen Pillay Member,IEEE,Ramu Krishnan MemberIEEE.Modeling,Simulation,and Analysis of Permanent-mag-net Motor Drives,Part II:The Brushless DC Motor Drive[J].IEEE Trans.,1989,25(2):274-279.
[6]Nam Ki-Yong,Lee Woo-Taik,Lee Choon-Man.Reducing TorqueRipple of Brushless DC Motor by Varying Input Voltage[J].IEEE Trans.,2006,42(4):1307-1310.
[7]Lee D H,Ahn J W.A Current Ripple Reduction of a High-speedMiniature Brushless Direct Current Motor Using InstantaneousVoltage Control[J].IET Electric Power Applications,2009,3(2):85-92.
[8]Sangsefidi Y,Ziaeinejad S,Shoulaie A.Torque Ripple Reduc-tion of BLDC Motors by Modifying the Non-commutatingPhase Voltage[C]//International Conference on Electrical,Control and Computer Engineering,2011:308-312.
[9]Sheng Tiantian,Wang Xiaolin,Shan Tao.A New Method toReduce Both Conduction and Commutation Torque Ripple forBLDC Machines[C]//17th ICEMS,2014:2975-2980.
[2]刘洋,赵金.一种无刷直流电机速度估计方法[J].电气传动,2015,45(1):10-13.
[3]陈冬,房建成.非理想梯形波反电势永磁无刷直流电机换相转矩脉动抑制方法[J].中国电机工程学报,2008,28(30):79-83.
[4]Renato Carlson.Analysis of Torque Ripple Due to Phase Com-mutation in Brushless DC Machines[J].IEEE Trans.,1992,28(3):632-638.
[5]Pragasen Pillay Member,IEEE,Ramu Krishnan MemberIEEE.Modeling,Simulation,and Analysis of Permanent-mag-net Motor Drives,Part II:The Brushless DC Motor Drive[J].IEEE Trans.,1989,25(2):274-279.
[6]Nam Ki-Yong,Lee Woo-Taik,Lee Choon-Man.Reducing TorqueRipple of Brushless DC Motor by Varying Input Voltage[J].IEEE Trans.,2006,42(4):1307-1310.
[7]Lee D H,Ahn J W.A Current Ripple Reduction of a High-speedMiniature Brushless Direct Current Motor Using InstantaneousVoltage Control[J].IET Electric Power Applications,2009,3(2):85-92.
[8]Sangsefidi Y,Ziaeinejad S,Shoulaie A.Torque Ripple Reduc-tion of BLDC Motors by Modifying the Non-commutatingPhase Voltage[C]//International Conference on Electrical,Control and Computer Engineering,2011:308-312.
[9]Sheng Tiantian,Wang Xiaolin,Shan Tao.A New Method toReduce Both Conduction and Commutation Torque Ripple forBLDC Machines[C]//17th ICEMS,2014:2975-2980.