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Energies 2017, 10(11), 1700;

Optimal Design of Permanent Magnet Arrangement in Synchronous Motors

Department of Electrical Engineering, the Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China
Author to whom correspondence should be addressed.
Received: 1 October 2017 / Revised: 19 October 2017 / Accepted: 21 October 2017 / Published: 25 October 2017
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A general pattern, which can include different types of permanent magnet (PM) arrangement in PM synchronous motors (PMSMs) is presented. By varying the geometric parameters of the general pattern, the template can automatically produce different types of PM arrangement in the rotor. By choosing the best arrangement of PMs using optimization method, one can obtain a better performance and lower manufacturing cost. Six of the most widely used conventional types of rotor structures can be obtained through the parameter variation of the general pattern. These types include five embedded PM types and a traditional surface-mounted PM type. The proposed approach combines optimization method embedded with finite element method (FEM) for solving the multi-objective optimization for the PM structures. To save computing load, this paper employs a strategy of sub-group optimization, which is on account of the impact levels of the design parameters on the objective functions, and a parallel computation, which is a valid method to shorten the computing time. As an application example, a PMSM is optimally designed. Its simulation results and prototype experiments are provided to showcase the effectiveness of the proposed method. View Full-Text
Keywords: finite element method; optimization; parallel; permanent magnet; synchronous motor finite element method; optimization; parallel; permanent magnet; synchronous motor

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Liu, X.; Lin, Q.; Fu, W. Optimal Design of Permanent Magnet Arrangement in Synchronous Motors. Energies 2017, 10, 1700.

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