Vibration Analysis and Optimization of Permanent Magnet Motor Based on Mode Programme Method

Abstract

Aiming at optimizing the vibration of the permanent magnet motor, the vibration performance of the permanent magnet motor was analyzed and optimized based on the mode program in this paper. A new kind of permanent magnet motor was designed. The radial electromagnetic force is larger under 256.8 Hz and does not exceed 7.1 kPa at frequencies above 577.8 Hz. Then the mode program by response surface method was conducted and its goal was to make the first-order inherent frequency greater than 577.8 Hz. The inner diameter, outer diameter, and length of the motor housing are selected as optimization factors. The first-order and the second-order inherent frequency of the designed permanent magnet motor housing are used as the optimization objectives. The average error rate of the regression equations of the first and second-order inherent frequency is only 0.76% and 0.88%, respectively. At last, the optimal scheme was put forward. The inner diameter, outer diameter, and length of the motor housing are 115.0 mm, 140.8 mm, and 160.0 mm are the optimal solution. The optimized first and second-order inherent frequency is 605.43 Hz and 1490.3 Hz, respectively. It is effective to weaken vibration and avoid resonance.