2019 Volume 27 Issue 3 Pages 335-340
The efficient construction method of mild hybrid is to minimize the mechanical loss by directly connecting the engine and the assist motor. The shape of the motor to be directly connected to the engine output shaft has a flat structure with a diameter of 250 to 300 mm and an axial length of 60 to 90 mm, and various multipolar PM motors have been proposed in order to obtain high output and high power generation. As a slot pole combination, it is known that a combination of 8-9 is good, but it was said to be impractical due to the problem of magnetic imbalance due to eccentricity. For large diameter motors, it is possible to configured with 16-18, twice the basic configuration. In this paper, we propose an IPM motor with 16 - 18 - combination for mild hybrid considering performance and low vibration during startup and power generation. The usefulness of 16 poles and 18 slots combination and the cogging torque · torque ripple reduction structure were clarified by finite element analysis.
