volume | PIER Journals

Abstract

Pseudo-direct-drive (PDD) machine is a new type of permanent magnet machine with high torque density and efficiency. PDD with consequent poles can reduce the influence of outer PM on electromagnetic torque, but it has the disadvantage of high eddy current loss which will limit the range of speed. By transferring PMs from high-speed rotor to low-speed rotor, the eddy current loss in PMs is reduced, and the high-speed rotor is more robust. In this paper, a flux-switching consequent pole PDD (CP-PDD) machine is built. After optimization through a multi-objective genetic algorithm, the superiority of the proposed machine to regular CP-PDD is demonstrated by comparing it through the finite element method. The output torque of the proposed machine is greatly affected by the direct drive torque. A prototype is built and tested to verify the proposed machine. Results show that the proposed machine is more suitable for high-speed operation due to the reduction of loss and robustness of the high-speed rotor. The working temperature of the proposed machine is analyzed, and there is almost no irreversible demagnetization.

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Dr. Kunwei Hong

Dr. Zhangwu Huang

Dr. Libing Jing