分数槽集中绕组永磁辅助同步磁阻电机的设计

Design of Permanent Magnet Assisted Synchronous Reluctance Motor with Fractional Slot Concentrated Winding

为了改善同步磁阻电机存在的转矩密度低、效率低等问题,课题组设计了一种10极12槽的永磁辅助同步磁阻电机。定子采用隔齿绕分数槽集中绕组,减小了相间耦合,增大了绕组自感,从而提高了电机的容错能力;此外,通过永磁辅助,增大电机的交直轴电感差,提高了电机的转矩密度;针对样机转矩脉动较大的问题,采用转子不对称磁障结构与定子斜槽的改进方法进行优化。仿真结果表明优化后电机的转矩脉动从32.0%减小到15.0%,表明课题组设计方案和优化方法具有可行性。

In order to improve the problems of low torque density and low efficiency of synchronous reluctance motor,a 10-pole 12-slot PMa-SynRM with fractional slot and concentrated winding(FSCW)was designed.Only alternate teeth carried a concentrated coil in the stator,which reduces the coupling between phases and increases the self-inductance of the windings,thereby improving the fault tolerance of the motor.The self-inductance of the winding was improved,thereby improving the fault tolerance of the motor.In addition,with the help of permanent magnets,the difference between inductance of d-axis and q-axis was increased,and the torque density of the motor was improved.Aiming at the problem of large torque pulsation of the prototype,rotor asymmetric magnetic barrier structure and stator skew were used for optimization.The simulation result shows that the torque ripple of the motor before and after the optimization is reduced from 32.0%to 15.0%,which verifies the feasibility of the optimization method.