Split ratio design technique of the magnetic-gear dual-rotor motor

This paper presents the split ratio optimization technique of the magnetic-gear dual-rotor motor (MGDRM). The split ratio of a MGDRM, which relates the stator inner diameter to the total motor diameter, can be optimized with the goal of generating maximum torque for a given motor volume. A new complementary structure is used to reduce the torque ripple. Combining with this new design techniques, a prototype of 12 kW is designed and manufactured. Experiments are carried out on a hybrid powertrain test bench. It is found that the design stage prediction is close to the test results.