A Consequent-Pole Magnetic-Geared Machine With Axially Embedded Permanent Magnets for Hybrid Electric Vehicle

This paper reveals the fundamental reason for asymmetrical issue in magnetic-geared machines (MGMs) based on flux modulation theory. The analysis indicates that magnetic circuits of three-phase windings MGMs are inherently asymmetrical. is even more severe conventional consequent-pole (CP-MGMs) because distorted field. Hence, to address issue, a novel structure featuring enhanced harmonic elimination capability proposed this paper. Consequently, torque density can also be improved. In particular, CP-MGM employs modular and axially embedded permanent magnets (PMs) achieve symmetrical back electromotive force (EMF) waveforms improved capability, respectively. To further improve electromagnetic performance CP-MGM, PM arc ratio modulator width analytically designed, which provides general design guideline CP-MGMs. illustrate merits few other included fair comparison finite element (FEA). Results show EMF lower ripple, as well consumption higher density, compared with its MGM counterparts.