Design Strategy of Magnetizer for Post-Assembly Magnetization of Spoke-Type Ferrite Magnet Motor
2019
Permanent magnets should receive external magnetic field energy for magnetization. It is a magnetizer that enables magnetization. The performance of magnets is determined by magnetization, and reaching 100% magnetization is very difficult. In this paper, a 3-times magnetizer was used for magnetization of a spoke-type ferrite magnet motor. The size of the permanent magnets and magnetizer winding must be designed appropriately to reach a high magnetization ratio. These parameters are determined using transient analysis, but this technique requires a significant amount of time. Magneto-static field analysis was used in this study with the goal of solving this problem. By using this method, the analysis time was reduced and a strategy for deriving a final model was proposed. The final model was designed using the proposed strategy and the model was manufactured. Finally, the performance of the 3-times magnetizer was confirmed by measuring the magnetization ratio of the magnets, and the proposed design strategy was verified through testing.
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