| 发明名称 | Manufacturing method of a permanent magnet dispoded in a rotating electrical machine | ||
| 摘要 | There are provided a process of forming a recess groove having a depth shallower than and a width larger than the notch groove for fracturing at a portion of fracturing and splitting in the permanent magnet; a process of forming the notch groove for fracturing the permanent magnet in a groove bottom of the recess groove formed in the recess-groove forming process; and a process of fracturing and splitting the permanent magnet along the notch groove so as to obtain magnet pieces. | ||
| 申请公布号 | US8819921(B2) | 申请公布日期 | 2014.09.02 |
| 申请号 | US201113698574 | 申请日期 | 2011.04.22 |
| 申请人 | Nissan Motor Co., Ltd. | 发明人 | Adachi Shuuji |
| 分类号 | H01F7/06;H02K15/03;H01F41/02;H01F7/02;H02K1/27 | 主分类号 | H01F7/06 |
| 代理机构 | Foley & Lardner LLP | 代理人 | Foley & Lardner LLP |
| 主权项 | 1. A manufacturing method of a permanent magnet disposed in a rotating electrical machine, in which a plurality of magnet pieces formed by fracturing and splitting the permanent magnet along a notch groove are aligned and bonded to each other, comprising: a step of forming a recess groove having a depth shallower than and a width larger than the notch groove at a portion of fracturing and splitting in the permanent magnet; a step of forming the notch groove for fracturing the permanent magnet by using laser beam machining in a groove bottom of the recess groove formed in the recess-groove forming step; and a step of fracturing and splitting the permanent magnet along the notch groove so as to obtain magnet pieces. | ||
| 地址 | Yokohama-shi JP | ||