volume | PIER Journals

Abstract

To address the shortcomings of conventional permanent magnet synchronous motors (CPMSMs), such as the inability to adjust the permanent magnet field and a narrow speed control range, this paper proposes a variable leakage flux permanent magnet synchronous motor (HPM-VLFM) based on a hybrid series-parallel permanent magnet configuration. This motor achieves a variable leakage flux permanent magnet motor (VLFM) by designing a magnetic barrier on the q-axis, and further realizes the HPM-VLFM by designing ferrite permanent magnets with a series-parallel magnetic circuit. First, this paper introduces a rotor topology of the proposed motor and establishes its equivalent magnetic circuit to elucidate its operating principle. Second, sensitivity analysis and response surface analysis are employed to investigate the relationship between parameters and response variables, and an optimal solution is obtained based on the given constraints. Finally, based on two-dimensional finite element analysis (FEA), the electromagnetic characteristics of the proposed motor were analyzed in detail, including variable flux leakage characteristics, no-load characteristics, inductance characteristics, and torque efficiency characteristics. The results indicate that the HPM-VLFM has a wider speed control range and higher efficiency.

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Prof. Zhongan Yu

Mr. Long Chen

Mr. Faneng Wu

Dr. Qianli Jia

Dr. Fangrong Wang