基于SVPWM的七相感应电机谐波消除方法研究

Research of Harmonic Elimination Method for Seven-phase Induction Motor Based on SVPWM

在电压源逆变器供电的多相电机驱动系统中,由于电机在广义零序子空间中的阻抗很小,采用传统SVPWM将会导致较大的定子谐波电流。在分析七相感应电机数学模型和逆变器基础上,针对3次、5次空间谐波问题,提出了一种基于SVPWM的谐波消除方法。通过调节矢量作用的顺序,同时使3次、5次子空间合成矢量为零来消除3次、5次谐波电流。在Matlab/Simulink仿真软件和七相感应电机调速平台下,通过仿真和实验验证了所提出控制算法的正确性和有效性。

In the multiphase motor drive system supported by VSI, the traditional SVPWM will lead to larger stator harmonic current, due to the small impedance in the generalized zero sequence subspaces. According to the 3rd and 5th harmonics problem in seven-phase VSI and mathematical model, this paper proposes a novel SVPWM method. By adjusting the vector sequence, it can make the synthetic vector be zero in the 3rd and 5th sub space, and reduce the3 rd and 5th harmonic component. Finally, using Matlab/Simulink and the seven-phase IM test bench,the simulation and experimentation results prove the validity and effectiveness of the proposed method.