Analysis of Magnetic Field and Torque Features of Improved Permanent Magnet Rotor Deflection Type Three-Degree-of-Freedom Motor

Zheng Li, Xuze Yu, Zengtao Xue and Hexu Sun
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Zheng Li: School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Xuze Yu: School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Zengtao Xue: School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
Hexu Sun: School of Electrical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

Energies, 2020, vol. 13, issue 10, 1-18

Abstract: This paper proposes a novel layered permanent magnet motor (N-LPM), which is based on a three-degree-of-freedom (3-DOF) permanent magnet motor. Compared with the former, the improved N-LPM air gap magnetic density, torque and structure stability have been significantly improved. The proposed N-LPM has three layers of stator along the axis direction, and each layer of stator has three-phase winding. In order to calculate the magnetic field and torque distribution of the N-LPM, an analytical method (AM) is proposed. For performance verification and accurate calculation, finite-element analysis (FEA) is adopted. The two kinds of motors before and after the improvement are compared, and their magnetic field, torque and stability are analyzed. The optimization rate is defined to evaluate the performance of the motor before and after improvement. The results show that the radial flux density, rotation torque, deflection torque and the volume optimization rate of the permanent magnet of the improved motor are 80%, 25%, 50% and 54.72% respectively, and the comprehensive performance is improved significantly.

Keywords: three-degree-of-freedom; permanent magnet motor; deflection; magnetic field and torque (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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