一种无刷双馈电机匝数配合的半解析优化方法

A Semi-Analytical Optimization Method for Turns Matching of Brushless Doubly-Fed Motor

绕组匝数的优化对提升电机性能具有重要作用,利用解析与仿真相结合的半解析方式,提出了一种无刷双馈电机(BDFM)定子两套绕组匝数配合的优化方法:解析推导BDFM电磁功率及热负荷公式,然后求解得到满足最大功率约束条件的所有匝数配合,再以热负荷最小为优化目标进行解析筛选及仿真细化筛选,最终选出在给定功率约束条件下热负荷最小的一组最优匝数配合。利用该方法对其他文献中的BDFM模型进行匝数优化,验证了该方法的普遍适用性。与完全依靠有限元仿真的匝数优化方法相比,所提方法先通过解析式快速地筛选出约三组匝数,再经有限元仿真进行细化筛选,最终选定这三组中的最优匝数配合,因此大幅缩短了优化设计周期并节约了计算资源。

The optimization of the number of winding turns plays an important role in improving the performance of the motor.A semi-analytical method combining analysis and simulation is used to propose a method for optimizing the number of winding turns of the two sets of windings of the brushless doubly-fed motor(BDFM).The electromagnetic power and thermal load formulas of the BDFM are analytically deduced,and then a series of turns matching satisfying the maximum power constraints are obtained.Taking the minimum thermal load as the optimization goal to carry out analytical screening and simulation refinement screening,a group of optimal turns matching with the minimum thermal load under the given power constraint is selected.Using this method to optimize the number of turns of the BDFM model in other literatures,the general applicability of the method is verified.Compared with the turn optimization method which completely relies on finite element simulation,this method filters out about three groups of turns quickly through analytical expression.Through the finite element simulation for refinement and screening,the optimal number of turns in the three groups is finally selected.Therefore,the optimization design cycle is greatly shortened and computing resources are saved.