摘 要:通过混合导通方式和将定子磁链圆划分为12扇区,将1个扇区内的非零可用电压矢量提高至12个,根据电压矢量对转矩的作用,给出一种当永磁同步电机定子磁链幅值和转矩控制要求矛盾时有利于减小不合理转矩波动的开关表,并分析了其对转子磁链运动的影响。仿真结果验证了理论分析的正确性。
Abstract: The number of available non-zero voltage vectors in the surface permanent magnet synchronous motor(PMSM)direct torque control(DTC)drives is up to 12 by composed-connection and dividing stator flux circle into 12 sectors.Based on the effects of voltage vectors on torque,a novel switching table using voltage vectors to decrease unreasonable torque ripple was proposed.Finally,The influence of the move of rotor flux on the PMSM DTC drives was studied.Simulation results testify theoretical analysis.
Key Words: Permanent magnet synchronous motor;Direct torque control;Voltage vectors;Torque ripple