| Title |
An Optimal Design of Notch Shape of IPM BLDC Motor Using the Differential Evolution Strategy Algorithm |
| Authors |
신판석(Shin, Pan Seok) ; 김홍욱(Kim, Hong Uk) |
| DOI |
https://doi.org/10.5370/KIEE.2016.65.2.279 |
| Keywords |
BLDC motor ; Notch design ; Cogging torque ; Differential evolution strategy ; IPMSM ; Optimization technique |
| Abstract |
In this paper, a cogging torque of IPM(Interior Permanent Magnet)-type BLDC motor is analyzed by FE program and the optimized notch on the rotor surface is designed to minimize the torque ripple. A differential evolution strategy algorithm and a response surface method are employed to optimize the rotor notch. In order to verify the proposed algorithm, an IPM BLDC motor is used, which is 50 kW, 8 poles, 48 slots and 1200 rpm at the rated speed. Its characteristics of the motor is calculated by FE program and 4 design variables are set on the rotor notch. The initial shape of the notch is like a non-symmetric half-elliptic and it is optimized by the developed algorithm. The cogging torque of the final model is reduced to 1.5[N·m] from 5.2[N·m] of the initial, which is about 71 % reduction. Consequently, the proposed algorithm for the cogging torque reduction of IPM-type BLDC motor using the rotor notch design seems to be very useful to a mechanical design for reducing noise and vibration. |