发明名称 |
Permanent magnet with reduced thickness at the pole areas for small size d-c motors |
摘要 |
A cylindrical field magnet for use in small size d-c motors having a coreless armature. The magnet includes magnetic pole portions varying in wall thickness from the interpolar portions and possesses an increased quantity of magnetic flux in its entirety without an increase in its outside diameter.
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申请公布号 |
US4181866(A) |
申请公布日期 |
1980.01.01 |
申请号 |
US19780907115 |
申请日期 |
1978.05.18 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD |
发明人 |
MORISAWA, MASANORI |
分类号 |
H02K23/58;H02K23/04;(IPC1-7):H02K21/12 |
主分类号 |
H02K23/58 |
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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