基于DTC-SVM的多电机并联驱动系统

Parallel-Connected Multi-Motors Driving System Based on Direct Torque Control with Space Vector Modulation

多电机并联驱动系统需要多个电机能够协调运行,对电机调速性能提出了更高要求。结合多电机并联驱动系统中的平均理论,将多台并联电机的参数进行平均化处理,提出一种基于空间矢量调制的直接转矩控制的多电机并联驱动方案。该驱动系统具有转矩波动小、磁链波形平滑、电流谐波含量低、逆变器开关频率恒定等特点。仿真结果表明,在转矩误差允许范围内,多电机并联驱动系统能够高速、协调运行。

Multiple motors parallel drive system needs multiple motor coordination operation,which puts forward higher requirements on motor speed control performance. Combined with the average theory implemented in parallelconnected multi-motors system,by averaging the parameters of multi-motors based on direct torque control,a kind of multi-motors parallel-connected driving scheme was presented. The system has the advantages of small torque ripple,smooth flux waveform,lower current harmonic content and fixed switching frequency. The simulation results show that the parallel-connected multi-motors driving system can operate rapidly and coordinately in the range of allowable torque error.