客服热线:18202992950

PERMANENT MAGNET TYPE ROTARY ELECTRICAL MACHINE 发明申请

2023-02-17 1920 1028K 0

专利信息

申请日期 2025-07-11 申请号 JP2012039521
公开(公告)号 JP2013176232A 公开(公告)日 2013-09-05
公开国别 JP 申请人省市代码 全国
申请人 HITACHI LTD
简介 PROBLEM TO BE SOLVED : To attain the challenge in which in a pump electric rotary machine for an LNG operated in an LNG liquid at -162°C, rare-earth magnets such as a neodymium magnet and a praseodymium magnet have at a low temperature such a characteristic as to shrink in a magnetization direction of a permanent magnet, but expand in a direction perpendicular to the magnetization direction, thereby requiring the need for considering linear expansion of an electromagnetic steel plate and a permanent magnet for a shape of a magnet insertion hole for inserting the magnet into the electromagnetic steel plate. SOLUTION : A permanent magnet constituting one pole in a rotor iron core of a permanent magnet rotor is halved about a magnetic pole, a connection portion as an electromagnetic steel plate is provided between the two division magnets, and arranged so that the center of the magnetic pole and a magnet magnetization direction are parallel with each other. A magnet insertion hole into which the permanent magnet is inserted is so shaped that a gap is provided between a plane perpendicular to the magnetization direction and an opposite plane of the electromagnetic steel plate at both ends of the permanent magnet in a width direction, a step portion having such a length that the height of the opposed surface is shorter than a thickness in the magnetization direction of the magnet is provided, and further a gap which extends in a direction perpendicular to the step toward a rotor outer-diameter side and a magnetic pole center side is provided outside the step. COPYRIGHT : (C)2013, JPO&INPIT


您还没有登录,请登录后查看下载地址


反对 0举报 0 收藏 0 打赏 0评论 0
下载排行
网站首页  |  关于我们  |  联系方式  |  使用协议  |  版权隐私  |  网站地图  |  排名推广  |  广告服务  |  积分换礼  |  网站留言  |  RSS订阅  |  违规举报  |  京ICP备2021025988号-4