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标题：基于试验设计方法的无刷直流电机结构优化设计 |
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作者：洪兴华 |
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| 2015年第9期 访问次数：556次 |
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摘要：齿槽转矩是永磁电机的固有现象，造成电机转矩脉动，影响电机的在速度控制系统中的低速性能和位置控制系统中的高精度定位。本文利用响应面法对无刷直流电机的结构进行优化，抑制其齿槽转矩，从而提高控制系统性能。以一台4极6槽无刷直流电机作为研究对象，采用试验设计方法筛选电机各结构参数，得到电机齿槽转矩与主要结构参数之间的数学模型，计算出可使齿槽转矩最小的结构参数最优组合，并通过有限元方法验证计算结果的正确性。实验结果表明，优化后的无刷直流电机的齿槽转矩有效减少了90%，试验设计方法是可以迅速求得全局最优解的有效的电机优化方法。
关键词：无刷直流电机；齿槽转矩；试验设计方法；优化设计
Abstract: The output torque ripple of the permanent magnet (PM) motor due to the cogging torque has effects on the low-speed capacity in the speed control system and the high accuracy location in the position control system. In this paper the structure of a brushless direct current (BLDC) motor was optimized with the design of experiments (DOE) method to reduce the cogging torque and improve the capacity of control system. Taking a 4-pole 6-slot BLDC machine for example, the structure parameters were filtrated with DOE method and the numerical model of the cogging torque and main structure parameters was established to calculate the optimal combination for minimum cogging torque, which was validated by finite element method (FEM). The results show that the optimized cogging torque of the BLDC machine is effectively reduced by 90% and the DOE method is a fast and valid optimization method for searching the global optimal solution.
Key words: BLDC motor；cogging torque；DOE；optimal design |
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