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Direct Torque Control for Complementary Magnetic-Geared Double-Rotor Motor Using Space Vector Pulse Width Modulation

Recently, magnetic-geared double-rotor motor (MGDRM) becomes a hot topic in the academic circle because it possesses the advantages of less noise and high torque density. As known, direct torque control (DTC) method is widely used in the industrial field. However, the existing researches only provide field-oriented control (FOC) for MGDRM. In order to research the performance of the DTC method in the MGDRM, a study of the DTC using space vector pulse width modulation (DTC-SVPWM) for a novel complementary MGDRM is presented in this paper. The complementary structure of the MGDRM are introduced. The detailed analyses are given in the mathematical model of MGDRM and DTC-SVPWM method. The simulation results confirm that not only does the DTC-SVPWM method have fast dynamic response and constant switching frequency, but also it can reduce torque ripples of the inner and outer rotors in MGDRM.