volume | PIER Journals

2024-09-06

Calculation and Analysis of Eddy Current Loss in High Temperature Permanent Magnet Canned Motor

Quanfeng Li,

Dr. Quanfeng Li

School of Electrical Engineering

Shanghai Dianji University

China

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Ziwei Wang,

Mr. Ziwei Wang

Shanghai Dianji University

China

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Xiang Li

Dr. Xiang Li

Shanghai First Machine Tool Factory Co. Ltd

China

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Progress In Electromagnetics Research C, Vol. 147, 145-152, 2024

doi:10.2528/PIERC24070601

Abstract

As an important part of the primary circuit system of a nuclear power plant, the safe and stable operation of the canned motor of a nuclear main pump is crucial. The existence of stator can and rotor can in the air gap of a canned motor will generate additional eddy current loss during the operation of the motor, which will be detrimental to the long-term stable operation of the motor. Therefore, in this paper, in order to analyze and weaken the eddy current loss generated on the shielding can, using the empirical formula method, the eddy current loss generated by the shielding can before optimization is calculated, and the relationship among the eddy current loss, can thickness, and motor speed is derived. Subsequently, two shielding can structure optimization schemes were proposed, and the reduction of eddy current loss after optimization was calculated using finite element simulation software. The effects of different optimization schemes were compared. Finally, peak torque and current experiments are conducted on the original motor to verify the accuracy of the finite element calculation results. The results show that both optimization schemes proposed in this paper can reduce the eddy current loss, and the axial segmentation scheme has a better reduction effect on the shielding can.

Citation

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Quanfeng Li, Ziwei Wang, and Xiang Li, "Calculation and Analysis of Eddy Current Loss in High Temperature Permanent Magnet Canned Motor," Progress In Electromagnetics Research C, Vol. 147, 145-152, 2024.
doi:10.2528/PIERC24070601

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