摘要
电动汽车用大功率无刷直流电机由于存在齿槽转矩使整车的性能受到严重影响,本文在不破坏梯形波反电动势(back-EMF)的目标下,利用响应面法(RSM)优化定子槽口偏移角度和槽口宽度抑制大功率无刷直流电机的齿槽转矩,从而提高电动汽车的性能。本文以一台30kW、4极12槽的电动汽车用无刷直流电机作为研究对象,采用试验设计(DOE)方法得到齿槽转矩与定子槽口偏移角度、槽口宽度两个因素之间的数学模型,从而计算出使齿槽转矩最小的槽口偏移角度和槽口宽度最优解组合,最后通过有限元法(FEM)验证了所得结果的正确性。实验结果表明,无刷直流电机的齿槽转矩被有效减小了87.6%,并且反电动势波形仍为平顶宽度不小于120°的梯形波。
The cogging torque in high-power BLDC drives could seriously affect the performance of electric vehicles. In this paper, response surface methodology（RSM） is used to optimize the angular shifts and the width of slot opening to reduce the cogging torque without deteriorating the trapezoidal shape of back-EMF, thereby improving the performance of electric vehicles. Taking a 30kW BLDC with 4 pole and 12 slots as the study subject, this paper achieves the mathematical model between cogging torque and angular shifts of slot opening as well as slot opening width by using experimental design（DOE） method, and then calculates the optimum combination of the angular shifts and the width of slot opening which makes the cogging torque minimum. Finally, the finite element method （FEM） is used to examine the accuracy of the results. The results show that the cogging torque is effectively reduced by about 87.6%. Moreover, the simulation shows the quality of back-EMF shape.
出处
《电工技术学报》
EI
CSCD
北大核心
2013年第6期40-45,共6页
Transactions of China Electrotechnical Society
基金
国家863高技术基金资助项目(2011AA11A259)
