Characteristic analysis of Interior Permanent Magnet Synchronous Motors Considering Voltage Harmonics

전압 고조파를 고려한 매입형 영구자석 동기전동기의 d-q 등가회로 해석

This paper deals with d-q axis equivalent circuit analysis of IPMSM(Interior Permanent Magnet Synchronous Motors) considering voltage harmonics. In the field weakening region, as the current vector angle increased, back-emf contains large harmonics, therefore, significant underestimation of voltage or overestimation of speed can be occurred from the conventional d-q axis equivalent circuit analysis. In order to consider the effects of voltage harmonics, a harmonic coefficient is introduced and verified by experiments.