Electromagnetic Shielding Effect of a Canned Permanent Magnet Motor

Kun Hu, Haijun Zhuang and Qiang Yu
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Kun Hu: School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Haijun Zhuang: School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China
Qiang Yu: School of Information and Control Engineering, China University of Mining and Technology, Xuzhou 221116, China

Energies, 2020, vol. 13, issue 18, 1-12

Abstract: Due to use of the metallic cans in the air gap, the electromagnetic shielding effect is formed, which is the prominent characteristic of the canned motor. In the flux field, eddy current induction occurs on both cans that thus affects the characteristic of the air gap flux field, and generates a loss that is the highest loss of the canned motor. In this paper, a combination method is proposed and stressed to analyze the shielding effect, based on a typical canned permanent magnet synchronous motor. First, the d q vector decomposition of the eddy current is studied. Second, the effect of the load angle on the loss distribution is studied. Finally, compared with the ordinary motor, the feature of can loss due to rotor speed and conductivity variation is shown. The three-dimensional finite element method is adopted, considering the end effect.

Keywords: canned electrical motor; can loss; shielding effect; eddy current; permanent magnet motor (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
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