发明名称 |
Method of manufacturing a permanent magnet which is to be arranged in an air gap of a transformer core |
摘要 |
A method of manufacturing a plate-shaped permanent magnet (7) which is to be arranged in an air gap of a core (1) for a transformer or choke coil and which consists of a number of permanent magnetic portions (29) which are made of a metal alloy having a high magnetic remanence and which are magnetized perpendicularly to the plane of the plate. A plate (11) of the alloy is fixed between two insulating foils (13, 15) after which this assembly is arranged on a flat backing (17) and is rolled in two mutually perpendicular directions (25, 27) by means of a cylinder (19) whose outer surface is provided with grooves (23). The plate (11) is thus very simply fractured to form a very large number of portions (29).
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申请公布号 |
US4369567(A) |
申请公布日期 |
1983.01.25 |
申请号 |
US19800185842 |
申请日期 |
1980.09.10 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
BOSCH, GERRIT;KOK, ARNOLDUS W.;GIETHOORN, HARMEN |
分类号 |
B28D5/00;H01F7/02;H01F41/02;(IPC1-7):B65B61/24;B26F3/00;H01F7/00 |
主分类号 |
B28D5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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