Theoretical Analysis and Optimal Design of Air-gap Field for Double Air-gap Field Modulation Permanent Magnet Motor
The magnetic field modulation permanent magnet motor achieves constant torque output through the magnetic field modulation effect,which has the advantage of high torque density.In this paper,the working principle and the process of magnetic field modulation for this motor are introduced,the modulation effect of magnetic field modulation permanent magnet motor in different modulating units was simulated and analyzed,the back EMF and maximum torque of the motor with different are length coefficients were stud-ied.It is concluded that the acre length coefficient of the modulation unit is generally to be 0.44～0.7,and the back EMF and maximum torque with acre length coefficient of 0.2、0.55 and 0.88 are compared and analyzed,the comparison results show that when the acre length coefficient is 0.55,the back EMF increases by 9.4％and 3.2％and the maximum torque of the low speed rotor increases by 10.7％and 54.5％re-spectively,compared with that when the acre length coefficient is 0.2 and 0.8.The research has guiding significance for the design of magnetic field modulation permanent magnet motor.
permanent magnet motormagnetic field modulationair-gap magnetic fieldacre length coeffi-cientfinite element analysis
万方数据
维普
