开关磁阻电机定子铁心及实体的模态仿真对比

Modal Simulation and Comparison of Stator Core and Real Stator in Switched Reluctance Motor

开关磁阻电机(SRM)的径向电磁力大,振动问题相较其他类型电机更为突出。分析明确定子的振动模态,成为制约电磁力激励下的电机耦合振动研究的先决条件。然而,真实电机定子既含有定子铁心核心部件,也包括外壳、端盖、绕组和散热筋等外围部件,复杂定子的固有频率和振动模态分析仍缺少全面可靠的结果。定子铁心、真实定子的固有频率和模态,采用有限单元方法分别进行了仿真,并归纳出各自的模态振型特点和演化规律。结果证明相较定子铁心,真实定子出现了密集的局部变形模态。定子模态分析思路和振型规律,为SRM的振动抑制以及节能降噪奠定了先期基础。

Switched reluctance motor generates large radial electromagnetic force during its operation,and the vibration problem is more prominent than other types of motors.The analysis of the stator’s vibration mode has become a prerequisite for deep study of the forced vibration of the motor excited by electromagnetic force.However,the real SRM stator contains not only the core components of stator core,but also the peripheral components such as shell,end cover,winding and heat dissipation rib.The analysis of natural frequency and vibration mode of real stator is still lack of comprehensive and reliable results.The natural frequencies and modes of stator core and real stator were respectively simulated by finite element method,and their modal characteristics and evolution laws were concluded.The results show that there are dense local deformation modes in the real stator compared with the stator core.The idea of stator modal analysis and the rule of vibration mode have laid a preliminary foundation for vibration suppression and energy saving and noise reduction of SRM.