Nonlinear Modeling of the Dual Flux Modulator Magnetic-Geared Machine Based on Dual d-q Coordination System

A nonlinear mathematical model based on variable inductance and dual d-q coordination system of dual flux modulator magnetic-geared machine (DFM-MGM) was proposed in this paper. The closed-loop speed control performance based on the d-q coordinate system is investigated, and i
d
=0 control is employed to analyze the static and dynamic performance of the DFM-MGM. Finally, the correctness of the proposed model is verified by experiment, the proposed model can predict the steady and transient process of DFM-MGM as a magnetic gear and electric machine.