Power Magnetics
ボンド磁石を用いた非対称磁極構造IPMモータの実機評価
キーワード:
Interior permanent magnet synchronous motor,
bonded magnet,
asymmetric pole structure,
reluctance torque,
heavy rare earth free
2023 年 7 巻 1 号 p. 73-79
詳細
2023 年 7 巻 1 号 p. 73-79
This paper presents an investigation into the usefulness of a motor with an asymmetric pole structure based on a prototype rotor using samarium-iron-nitrogen bonded magnets. Comparing the torque characteristic of the proposed asymmetric-pole motor with that of a conventional motor using a neodymium sintered magnet, the maximum torque of the proposed motor increased by 12%. Furthermore, a comparison of efficiency characteristics showed that asymmetric motors have better efficiency characteristics than conventional motors in the high-load and low-speed ranges. It was found that an asymmetric rotor structure with a complicated magnet shape negatively affects the efficiency characteristics in the high-speed operating region.
