发明授权
US4151435A Stator structure using forming curved wafer thin magnets from rare
earth-cobalt alloy powders
失效
使用从稀土钴合金粉末形成弯曲晶片薄磁体的定子结构
- 专利标题： Stator structure using forming curved wafer thin magnets from rare earth-cobalt alloy powders
- 专利标题（中）： 使用从稀土钴合金粉末形成弯曲晶片薄磁体的定子结构
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申请号： US903156申请日： 1978-05-05
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公开(公告)号： US4151435A公开(公告)日： 1979-04-24
- 发明人: William F. Jandeska , Charles F. Netherton , Charles W. Vigor
- 申请人： William F. Jandeska , Charles F. Netherton , Charles W. Vigor
- 申请人地址： MI Detroit
- 专利权人： General Motors Corporation
- 当前专利权人： General Motors Corporation
- 当前专利权人地址： MI Detroit
- 主分类号： H01F1/055
- IPC分类号： H01F1/055 ; H01F41/02 ; H01F41/14 ; H02K15/03 ; H02K21/26
摘要：
In a preferred embodiment thin curved rare earth-cobalt magnets supported on the interior surface of a steel casing are formed by hot isostatic compaction. Rare earth-cobalt powder is magnetically aligned and compacted to at least 65% of the theoretical density. The relatively strong, curved green compacts are positioned on a curved mandrel and placed in a closely fitting steel casing which is evacuated and sealed. The magnets are densified under isostatic gas pressure at elevated temperatures and bonded to the steel. The steel backing serves as an integral motor casing when such magnets are used in D.C. motors.
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