首页|Back EMF Harmonics Suppression of a Rotor Permanent Magnet Flux-Switching Motor Through Air-Gap Harmonic Design
Back EMF Harmonics Suppression of a Rotor Permanent Magnet Flux-Switching Motor Through Air-Gap Harmonic Design
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NETL
NSTL
IEEE
Unlike the stator permanent magnet flux-switching (SPMFS) motor, the sinusoidal degree of the no-load back electromotive force (back EMF) in the rotor permanent magnet flux-switching (RPMFS) motor is not high, which will decrease the utilization rate of the inverter voltage and the torque performances. Hence, this article proposed a new RPMFS motor according to the principle of the back EMF. On this basis, an optimization design method based on the air-gap harmonics for the RPMFS motor to reduce the total harmonic distortion (THD) of the back EMF. Firstly, based on the flux-modulation theory, the magnetomotive force (MMF)-permeance model is analyzed to investigate the no-load air-gap flux density, contributing to the back EMF, and is obtained by introducing the winding function theory. Then, the minimal main air-gap harmonics to back EMF and the maximum main air-gap harmonic to torque are selected as the optimization objectives to realize the multi-objective optimization design. Finally, an optimal motor prototype was manufactured and tested to verify the feasibility of the proposed motor with low back EMF THD.
NETL
NSTL
IEEE
