Zero-Sequence Inductance Analysis of IPMSM Based on EMN Model Considering Magnetic Circuit Saturation

An equivalent magnetic network model considering magnetic circuit saturation is applied to calculate the zero-sequence inductance of an interior permanent magnet synchronous motor, and the dynamic analysis process when the rotor is rotating is simplified to make it more efficient and easier. The research object of this paper is a three-phase interior permanent magnet synchronous motor, and the equivalent magnetic network model established has good accuracy compared with the finite element simulation results. Finally, the freezing permeability is introduced into the equivalent magnetic network model under different operating points to calculate the zero-sequence inductance with good accuracy.