Research on Cogging Torque Reduction of Hybrid Excitation Variable Flux Reluctance Machine
In order to solve the problem of high cogging torque of hybrid excited variable flux reluctance machine(HEVFRM),the method of pole cutting of 6-slot 7-pole HEVFRM rotor was studied.The no-load air-gap magnetomotive force and magnetic conductivity model is established to calculate the harmonic dis-tribution in the no-load air-gap magnetic field.By comparing the amplitude of the no-load air-gap magnetic density harmonic of the original rotor,the anti-cosine pole cutting,the anti-cosine plus the third harmonic pole cutting and the anti-cosine plus the third and fifth harmonic pole cutting rotor,the pole cutting rotor structure can reduce the amplitude value of the higher-order air-gap magnetic density harmonic to suppress the cogging torque.The results show that the anti-cosine pole cutting rotor can effectively suppress the cog-ging torque,and the combination of anti-cosine pole cutting and harmonic injection can further suppress the cogging torque.Among them,the arccosine plus third and fifth harmonic pole cutting rotor structure can suppress 99.1%of the cogging torque,while the average output torque is only reduced by 4.5%.Through experiments,it was verified that the anti cosine pole cutting rotor can effectively suppress the cogging torque of the 6-slot 7-pole HEVFRM.
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万方数据
维普
