Version 1
: Received: 6 May 2024 / Approved: 7 May 2024 / Online: 7 May 2024 (10:14:56 CEST)
How to cite:
Ma, S.; Chen, K.; Li, C.; Ma, J. Analytical Modeling of Eddy Current Loss and Thermal Analysis of Non-Uniform Air Gap Combined Pole Permanent Magnet Motors for Electric Vehicles. Preprints2024, 2024050341. https://doi.org/10.20944/preprints202405.0341.v1
Ma, S.; Chen, K.; Li, C.; Ma, J. Analytical Modeling of Eddy Current Loss and Thermal Analysis of Non-Uniform Air Gap Combined Pole Permanent Magnet Motors for Electric Vehicles. Preprints 2024, 2024050341. https://doi.org/10.20944/preprints202405.0341.v1
Ma, S.; Chen, K.; Li, C.; Ma, J. Analytical Modeling of Eddy Current Loss and Thermal Analysis of Non-Uniform Air Gap Combined Pole Permanent Magnet Motors for Electric Vehicles. Preprints2024, 2024050341. https://doi.org/10.20944/preprints202405.0341.v1
APA Style
Ma, S., Chen, K., Li, C., & Ma, J. (2024). Analytical Modeling of Eddy Current Loss and Thermal Analysis of Non-Uniform Air Gap Combined Pole Permanent Magnet Motors for Electric Vehicles. Preprints. https://doi.org/10.20944/preprints202405.0341.v1
Chicago/Turabian Style
Ma, S., Changwei Li and Jianwei Ma. 2024 "Analytical Modeling of Eddy Current Loss and Thermal Analysis of Non-Uniform Air Gap Combined Pole Permanent Magnet Motors for Electric Vehicles" Preprints. https://doi.org/10.20944/preprints202405.0341.v1
Abstract
In order to solve the problem of large eddy current loss and high temperature rise caused by large amount of permanent magnet, a new type of combined magnetic pole permanent magnet motor is proposed in this paper. The sinusoidal distribution subdomain model of non-uniform air gap rotor is established by using Laplace equation, and the analytical expression of eddy current loss of rotor in uniform air-gap and non-uniform air-gap is derived. The effect of rotor eccentricity on eddy current loss is obtained. According to the characteristics of distributed winding of non-uniform air gap combined pole permanent magnet motor, equivalent treatment is performed to obtain the equivalent thermal conductivity, so as to establish equivalent thermal network model of motor, calculate the temperature value of each component of the motor, and verify the correctness of the thermal network model through the method of magnetothermal bidirectional coupling. Finally, an experimental platform is set up to carry out temperature rise experiments on the two prototypes respectively. Experimental results show that the non-uniform air-gap rotor structure can effectively reduce the rotor eddy current loss and motor temperature rise, and also verify the accuracy of the analytical model calculation results.
Keywords
combined pole permanent magnet motor; non-uniform air gap; eddy-current loss; thermal analysis; equivalent thermal network
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
