Design and Analysis of a Novel Flux Modulated Dual-Rotor Permanent Magnet Machine

The transmission and conversion of torque is an important link in hybrid electric vehicles (HEV), which is related to the quality and driving experience of such vehicles. A new flux modulated dual-rotor permanent magnet machine (FR-DRPM) is proposed in this paper for torque transmission. The topology and operating principle of the FM-DRPM are proposed and analyzed. Different combinations between the two rotors of the FR-DRPM are investigated to minimize the torque ripple and cogging torque based on finite-element analysis method. A 21/17 rotor pole machine is selected for the further optimization of torque performances. To better optimize the proposed machine, a new method combined with CatBoost and multiple objective particle swarm optimization (MOPSO) is presented. The results based on the proposed method are compared with traditional multiple objective genetic algorithms to verify the properties of the new method. The optimization method is efficient and superior and the FR-DRPM has good torque transmission performance in HEV.