Magnetic Form applying a C-Shaped Magnet for Hybrid Electric Vehicles

カテゴリ: 論文誌(論文単位)

グループ名: 【D】産業応用部門（英文）

発行日: 2022/05/01

タイトル(英語): Magnetic Form applying a C-Shaped Magnet for Hybrid Electric Vehicles

著者名: Shingo Soma (Honda Motor Company, Ltd.), Yoshihisa Kubota (Honda Motor Company, Ltd.), Tatsuya Ohzu (Honda Motor Company, Ltd.)

著者名(英語): Shingo Soma (Honda Motor Company, Ltd.), Yoshihisa Kubota (Honda Motor Company, Ltd.), Tatsuya Ohzu (Honda Motor Company, Ltd.)

キーワード: motor，magnet，HEV，BEV，vehicle，haigh-diagram

要約(英語): Currently, electrification for vehicles such as battery electric vehicles (BEVs), plug in-hybrid electric vehicles (PHEVs), fuel cell electric vehicles (FCEVs), and hybrid electric vehicles (HEVs) has received considerable attention, owing to the urgent need to reduce CO2 emissions created from transportation and the energy dependency on crude oil. Honda has set a target whereby two-thirds of total global sales should come from EVs by 2030. A traction motor is an essential component of electrified vehicles. Generally, interior permanent magnet synchronous motors (IPMSMs) are used as traction motors owing to their high torque and power density, high efficiency and ease of use. The design of rotors, which consist of magnets and electrical steel sheets, is important for IPMSMs because their average torque, efficiency, quietness, as well as cost depend on it. We have developed a novel rotor, which allows for a degree of freedom in the shape of the magnets. In the proposed rotor, first, the shape and position of the magnets are determined parametrically under manufacturing constraints. Then, the shape of the electrical steel sheet is determined by the ideal flux-line using maximized Lq-Ld. This involves combining q-axis flux and flux shape optimization for a practical design of the rotor. We also reduced torque ripple by considering the magnet position and dimple design. Rotors that are used in electrified vehicles are rotated at a maximum speed without gearing; therefore, the rotor must be designed by taking into consideration not only the magnetic forces but also the centrifugal ones. Therefore, we studied a mechanical simulation by optimizing magnetic performance while limiting maximum stress and displacement. We also developed a new production process for a C-shaped sintered and hot-deformed magnet.

本誌: IEEJ Journal of Industry Applications Vol.11 No.3 （2022）

本誌掲載ページ: 467-474 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejjia/11/3/11_21009036/_article/-char/ja/