一种采用取向硅钢片的新型同步磁阻电机

A New Type Synchronous Reluctance Machine With Oriented Silicon Steel Sheet

同步磁阻电机(SynRM)结构简单、稳定可靠,但转矩和功率因数偏低,在过载运行下转子导磁桥和定子齿等磁通流经关键位置的硅钢片会逐渐饱和,使得电机发热增多,输出转矩降低。本文提出一种新型同步磁阻电机(NSynRM),通过在电机转子导磁桥表面增加使用取向硅钢片以及在定子齿部替换使用取向硅钢片来解决原电机中磁密饱和带来的问题。同原电机中的硅钢片相比,取向硅钢片在轧制方向具有高磁导率和高饱和磁密的特点,因此在新型同步磁阻电机中使取向硅钢片轧制方向沿着直轴磁场流通方向,能够使磁通沿着取向硅钢片顺利流通,增加电机的抗饱和能力。计算结果表明,新型同步磁阻电机在过载运行条件下,具有更大的转矩和功率因数,能有效降低电枢绕组温升,提高能量利用率。电机的电磁性能计算通过有限元软件完成。

Synchronous reluctance motor(SynRM)was simple in structure,stable and reliable.However,the torque and power factor were low.Under overload operation,the silicon steel sheet in the key position where the flux flows,such as the rotor magnetic bridge and stator tooth,will gradually become saturated,which will increase the heat of the motor and reduce the output torque.In this paper,a new type synchronous reluctance motor(NSynRM)was presented.By adding oriented silicon steel sheet on the surface of the rotor magnetic bridge and replacing oriented silicon steel sheet on the stator tooth part,the problem of magnetic density saturation in the original motor was solved.Compared with the silicon steel sheet in the original motor,the oriented silicon steel sheet in the rolling direction has the characteristics of high magnetic permeability and high saturation magnetic density.Therefore,the magnetic flux can flow smoothly along the oriented silicon steel sheet in the rolling direction along the direction of the direct axis magnetic field in the NSynRM,and the anti-saturation ability of the motor can be increased.The calculation results show that the NSynRM has higher torque and power factor under the condition of overload operation,which can effectively reduce the temperature rise of armature winding and improve the energy utilization rate.The electromagnetic performance of the motor was calculated by finite element method(FEM).