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| Optimization study for reducing cogging torque in permanent magnet synchronous motor used for direct-drive oil pumping |
| XIAO Wen-sheng1, CUI Jun-guo1, LIU Jian1, WU Xiao-dong2, HUANG Hong-sheng2 |
| 1. Research Center for New Petroleum and Petrochemical Equipment and Technology, Ministry of Education, China University of Petroleum (East China), Qingdao 266580, China; 2. Wuhan Jianghan Petroleum Machinery Limited Company, Wuhan 430040, China |
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Abstract An optimization procedure for reducing the cogging torque of permanent magnet synchronous motor (PMSM) was presented. There are many geometric parameters which have different influences on cogging torque during the design process of PMSM. For saving design time and cost, Plackett-Burman design was employed for the screening activity to find the most significant parameters. The response surface methodology (RSM) was used to build a second-order analytical model between significant parameters and cogging torque and determine the effectiveness of the fitting model. The finite element method (FEM) was used for numerical experiments in order to determine the coefficients of the fitting model. The genetic algorithm (GA) was used to search the optimum solution. The numerical results based on optimization demonstrate that compared with the initial value the cogging torque significantly decreased, which means that the stability of the PMSM will be greatly improved and the noise will be reduced during the working process. The effectiveness of the design procedure was proved by the prototype test．
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Published: 06 June 2018
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直驱采油用永磁同步电机削弱齿槽转矩优化
提出削弱永磁同步电机齿槽转矩的优化设计方法.在永磁电机设计过程中影响齿槽转矩的参数有多个,但每个参数对齿槽转矩的影响程度不同,为了节约设计时间与成本,采用Plackett-Burman设计从多个设计参数中筛选出影响齿槽转矩的显著因子.应用响应面法(RSM)建立显著因子与齿槽转矩的二阶响应模型并判定拟合模型的有效性,采用有限元法(FEM)分析实验安排以确定回归系数.采用遗传算法(GA)寻优,找到使齿槽转矩最小的最佳解.根据优化结果进行有限元分析可知,与初始值相比,齿槽转矩显著降低,这在很大程度上提高了电机运行的稳定性,降低了运行过程中产生的噪声.通过样机试验证明了该优化设计方法的有效性.
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