基于双PI级联结构的永磁同步电机弱磁控制转矩自适应六边形电压扩展方法

Hexagon voltage extension is an effective method to improve the maximum output torque of permanent magnet synchronous motors (PMSMs) in flux-weakening (FW) region. But, the hexagon voltage extension can cause the voltage harmonic inevitably, leading to torque ripple. In this article, it is proved that the increasing rate of voltage harmonic gradually increases during the extension from the inscrib...