Abstract
The magnetization direction of a permanent magnet is an important variable in the design process of a brushless dc motor. This paper describes the effect of the magnetization direction on the various characteristics. Especially, we concentrate on the irreversible demagnetization characteristic of a permanent magnet. Two kinds of magnetization direction (radial and parallel direction) and finite element method are used to analyze the effect. From the simulation and experimental results, we suggest that the radial magnetization direction has more advantage in terms of the irreversible magnet demagnetization.
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