关键词: 转子总成, 增重动平衡, 矢量分解法

Abstract: New energy vehicle motors have higher requirements on the size, weight and cost of products when they meet the requirements of dynamic balance accuracy. In order to achieve a more compact structure, a lower cost, and a reasonable assembly process,a rotor weight-increasing dynamic balance method was proposed.Compared with the traditional weight-removing dynamic balancing method, the weight-removing dynamic balance plate was eliminated, and the weight-removing hole in the rotor core insert counterweight pins to achieve dynamic balance. The weight-removing hole design of the rotor coremet the rotor static balance requirements, while taking into account the structural strength and electromagnetic performance requirements. According to the weight gain dynamic balance process, a design method of rotor assembly was proposed.According to the weight gain dynamic balance theory, the weight gain mass of the counterweight pin was minimized by the vector decomposition method. The method combined with the actual project application reduce the weight of the rotor assembly by 7% and the material cost by 5%.

Key words: rotor assembly, weight gain dynamic balance, vector decomposition method