一种新颖的多相SVPWM

在采用电压型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电流谐波.本文提出了一种新颖的多相SVPWM,它不仅在d-q子空间中合成给定电压矢量满足转矩控制的要求;同时使广义零序子空间中合成电压矢量为零,有效抑制了电流谐波.以五相永磁同步电机驱动系统为例子,仿真和试验结果验证了方法的有效性.

Novel Multiphase SVPWM

Multiphase drives are multi-dimensional systems, so it is improper to control multi-dimensional system only on a two-dimensional plane like the traditional SVPWM, which would results in very large harmonic currents, due to the small impedance in some subspaces such as z1-z2 subspace. This paper develops a novel multiphase multi-dimensional SVPWM, which not only supplies the required voltage on d-q subspace, but also makes the resultant voltage vectors on other subspaces to be zero. A five-phase PMSM drive system is taken as an example. Simulations and experimental results verify its validity.