Zero-axis current suppression of permanent magnet synchronous motor based on double vector common bus open winding

Due to the difference between the internal structure of the motor and the traditional motor, there is a zero-axis current loop, so the zero-axis current suppression is a crucial problem, and the traditional single-vector control, if the output voltage vector is large, it can only output a corresponding non-adjustable voltage vector, which may not be able to meet the requirements of zero-sequence current control. The dual-vector control strategy selects two voltage vectors in one cycle, and the two voltage vectors are more flexible, which can meet the requirements of suppressing the zero-axis current to the greatest extent.