发明名称 |
Permanent magnet type rotary electric machine and electrically driven vehicle using the same |
摘要 |
A plurality of permanent magnets 6 are embedded in a cylindrical rotor core 8 and arranged in a circumferential direction of the rotor core 8. A pair of side rings 81 are mounted on the axial ends of the rotor core 8. The outer diameter of each side ring 81 is set smaller than the outer diameter of the rotor core 8. With this structure, an eddy current generated in each side ring 81 can be suppressed to thereby prevent abnormal heating and accordingly prevent thermal demagnetization of the permanent magnets 6.
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申请公布号 |
US6426579(B1) |
申请公布日期 |
2002.07.30 |
申请号 |
US19990472519 |
申请日期 |
1999.12.27 |
申请人 |
HITACHI, LTD.;HITACHI CAR ENGINEERING CO., LTD. |
发明人 |
ODA KEIJI;SHIBUKAWA SUETARO |
分类号 |
B60K1/00;H02K1/27;(IPC1-7):H02K1/22 |
主分类号 |
B60K1/00 |
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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