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2010•Australian Journal of Electrical & Electronics EngineeringRequires access

Further Study on Analytical Model for Iron Losses of Permanent Magnet Machine with Bevelling Magnet

Haoxin Wang, Guoqiang Li, L. H. Cao, Xuan Hong, Ruyi Wan

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Abstract

This paper proposes bevelling magnet edges that can reduce iron losses in permanent magnet (PM) machines. The maximum flux density and time rate change of flux density in teeth and yoke are deduced, respectively, considering a random angle of bevelling magnet edges. The analytic models of the average eddy current and hysteresis loss in teeth and yoke are presented respectively. The torque ratio of bevelling 75° and right-angle magnet is 0.983, whereas the ratio of PM material required between two cases is 0.971. Experimental results were proposed to verify the analytic model of total iron losses.

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What this paper is about

This paper proposes bevelling magnet edges that can reduce iron losses in permanent magnet (PM) machines. The maximum flux density and time rate change of flux density in teeth and yoke are deduced, respectively, considering a random angle of bevelling magnet edges. The analytic models of the average eddy current and hysteresis loss in teeth and yoke are presented respectively. The torque ratio of bevelling 75° and right-angle magnet is 0.983, whereas the ratio of PM material required between two cases is 0.971. Experimental results were proposed to verify the analytic model of total iron losses.

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Available abstract

This paper proposes bevelling magnet edges that can reduce iron losses in permanent magnet (PM) machines. The maximum flux density and time rate change of flux density in teeth and yoke are deduced, respectively, considering a random angle of bevelling magnet edges. The analytic models of the average eddy current and hysteresis loss in teeth and yoke are presented respectively. The torque ratio of bevelling 75° and right-angle magnet is 0.983, whereas the ratio of PM material required between two cases is 0.971. Experimental results were proposed to verify the analytic model of total iron losses.

Key concepts: Magnet, Yoke (aeronautics), Eddy current, Torque density, Torque, Hysteresis, Permanent magnet synchronous generator, Materials science

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