摘要
开关磁阻电机(SRM)结构简单、可靠性高,已应用在一些低速驱动场合,但开关磁阻电机的双凸极结构及磁路高饱和,带来了较大换相尖峰电流问题。为削弱换相尖峰电流和降低驱动系统容量,提出定子阶梯齿结构,通过较窄的一级齿保证输出转矩,较宽的二级齿降低磁极饱和程度。首先,研究阶梯齿结构对降低铁心磁通密度饱和程度的可行性;然后,利用有限元软件分析阶梯齿尺寸对输出转矩和换相尖峰电流的影响;最后,基于工程问题,提出带极靴结构阶梯齿开关磁阻电机的设计方法。仿真结果表明,阶梯齿结构可以提高电机抗饱和能力,有效削弱换相尖峰电流。
Switched reluctance motor(SRM)has the advantages of simple structure,high reliability,and has been widely used in the application of low-speed driving.However,the double salient structure of SRM and the high saturation of the magnetic circuit lead to the problem of commutation peak current.In order to reduce the commutation peak current and the capacity of the driving system,a steped tooth structure of the stator is proposed.The output torque of the motor is ensured by the first-stage tooth with narrower arc,and the saturation of the stator poles is reduced by the second-stage tooth with wide arc.Firstly,the feasibility of the stepped tooth structure to reduce the saturation of the iron core is studied.Then,the finite element analysis is used to analyze the output torque and commutation peak current influenced by the size of the step tooth.At last,from the perspective of engineering consideration,a design method of the stepped tooth SRM with pole shoes structure is proposed.The results show that the stepped tooth structure can improve the anti-saturation ability of the SRM and reduce the commutation peak current effectively.
作者
孙宇亮
彭兵
SUN Yuliang;PENG Bing(School of Electrical Engineering,Shenyang University of Technology,Shenyang 110870)
出处
《电气技术》
2022年第7期50-55,63,共7页
Electrical Engineering
基金
国家自然科学基金项目(51877139)。
