新型无刷直流电机有限元分析及系统试验研究

The Finite Element Analysis and System Experimental Study of Novel BLDCM

摘要: 无刷直流电机以其结构简单、效率高及易于控制等特点，已在汽车、航天、家用电器等领域得到了广泛的应用。新型无刷直流电机是在传统无刷直流电机的基础上提出的新结构电机，该电机采用双组凸极定转子结构，并利用中央线圈替代了转子永磁体励磁，具有高气隙磁通、启动转矩大的特点。该文对电机的结构及工作原理进行了介绍。根据电机结构的基本参数，构建电机的三维模型，运用三维有限元仿真对电机的电磁特性和机械运动特性进行研究，并通过空载实验验证了新型无刷直流电机不但具有传统无刷直流电机结构简单，可靠性高的特点，而且效率高、扩速能力强，对于实现其在工业传动系统中的应用具有参考价值。

Abstract: Brushless DC Motor has been widely applied in automotive, aerospace, household appliances and other fields with its advantages of simple structure, high efficiency and conveniency of control. Novel Brushless DC Motor is a new structural motor designed on the basic of traditional Brushless DC Motor, which adopt double sets of salient-pole stator and rotor and use centre excitation coil instead of rotor permanent magnet, with the characteristics of high air-gap flux and large starting torque. The structure and operation principle are introduced in this paper. Through the three- dimensional model built on the general parameters of the motor structure, the electromagnetic and mechanical performances are analyzed by using the 3-D finite element method. Then the motor’s performance has been tested by no-load experimental. The simulation and experimental results verify that the motor has traditional Brushless DC Motor’ characteristics of simple structure and high reliability, and has the advantage of high efficiency and great capacity to expand speed, which has reference value for its realization in industrial transmission system.