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Effect of permanent magnet material on the electromagnetic performance of switched-flux permanent magnet machine

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Abstract

The influence of permanent magnet materials on the electromagnetic performance of switched-flux permanent magnet (PM) machine having C-core stator assembly is investigated and compared. Both two-dimensional (2D) finite element analysis (FEA) and 3D-FEA are used in predicting the results. Presently, there has not been any study on the performance effect of using a wide range of different types of magnet on C-core switched-flux PM machine. Hence, there is a need for this latest investigation. The considered magnetic materials are: Alnico grade A500, Ferrite grade F5, Neodymium–Iron–Boron (NdFeB) grade N52, and Samarium–cobalt grade S24. The analysis shows that the best electromagnetic performance, including machine efficiency, would be obtained from a given electrical machine when it is equipped with NdFeB magnetic material due to its possession of the highest amount of magnetic remanence, coercive force, and energy product (BH)max. Consequently, the machine having ferrite magnetic material would produce the worst electromagnetic performance, although it is of the lowest cost.

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Acknowledgement

I wish to thank the Commonwealth Scholarship Commission, UK, for the sponsorship to run a Ph.D. programme at the University of Sheffield, UK, during which period this research was conceived.

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  1. Department of Electrical and Electronic Engineering, Michael Okpara University of Agriculture, Umudike, Nigeria

    Chukwuemeka Chijioke Awah

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Correspondence to Chukwuemeka Chijioke Awah.

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Awah, C.C. Effect of permanent magnet material on the electromagnetic performance of switched-flux permanent magnet machine. Electr Eng 103, 1647–1660 (2021). https://doi.org/10.1007/s00202-020-01155-8

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