Conference: 한국자동차공학회 춘계학술대회
Authors: 손동균, 정영훈, 조민복, 임명섭, 홍정표
DOI:
In IPMSM (Interior Permanent Magnet Synchronous Motor), the induced voltage increase in high speed driving and then the THD (Total Harmonic Distortion) of induced voltage will be increased because of the local saturation of the air-gap magnetic flux density during field weakening control. This paper proposes a method of reducing the line to line induced voltage not to exceed the voltage limit in high speed driving. The first method is to define the air-gap length as ICF(Inverse Cosine Function), and the other is to apply the eccentricity in rotor. When ICF and eccentricity are applied, the spatial distribution of the magnetic flux density can be sinusoidal. This paper compares the maximum values of the induced voltage changing the ratio of d axis and q axis air-gap length and eccentricity radius. As a result, the specification can be satisfied when the q axis air-gap length is 4 [㎜] in ICF model.