同轴串联的双SRM转矩脉动抑制的研究

Study on Torque Ripple Suppression of Double SRMs in Coaxial Series

研究开关磁阻电机转矩脉动问题。由于开关磁阻电机(Switched Reluctance Motor,SRM)较大的转矩脉动,引起电机噪声和转矩波动,影响了汽车的舒适性。针对SRM转矩脉动问题,根据开关磁阻电机定、转子双凸极结构的特点及转矩特性,提出了同轴串联的双SRM结构。双SRM结构由两个尺寸和结构相同的SRM组成,其转子凸极对称错开并同轴连接。双SRM结构的定、转子极数和相数是单SRM结构的两倍,减小了转矩脉动,提高了SRM的平滑度,同时双SRM结构另一个特点是低成本制造与加工。在MATLAB/SIMULINK环境下,仿真结果表明,双SRM结构的转矩脉动较单SRM结构明显降低,也验证了其抑制转矩脉动的有效性。

High torque ripple limits switched reluctance motor＇ s （SRM） application on automobile industry and other fields was studied. Based on stator and rotor doubly-salient structure and torque characteristics of SRM, a structure of double SRMs in coaxial series was proposed to decrease torque ripple. The structure was composed of two SRMs of the same size and structure, its rotor salient poles were symmetrically shifted and its shafts were joined to- gether in coaxial. The number of doubly salient and phase of double SRMs structure was twice as many as single SRM structure. The structure not only decreases the torque ripple and improves the smoothness, but also reduces the manu- facturing expenses and difficulty of double SRMs structure. In the MATLAB/SIMULINK environment, the simulation results prove that the double SRMs structure makes the electromagnetic torque become smoother compared with single SRM structure, which verifies that the proposed structure can suppress the torque ripple effectively.