영구자석형 동기전동기의 약계자제어에 관한 연구

A study on Field-Weakening Control for Permanent Magnet Synchronous Motor

A permanent magnet synchronous motor(PMSM) differs from an ordinary synchronous motor in that the former has no field winding and the field flux can not be controlled by field current. A field-weakening control of PMSM utilizing the demagnetization due to d-axis armature reaction is equivalent to reducing the field current. In this paper, the armature resistance is considered for the optimum field-weakening control.