发明名称 |
Method and apparatus for cleaning a DC motor commutator-brush interface |
摘要 |
Commutators on a direct current motor run at low speed for an extended period of time get covered with a coating that makes the interface between the commutator and the brushes unreliable especially with the low speed, low current operation. This is especially true for drive motors in a data processing tape drive unit where speed control is critical. The brush to commutator interface can be cleaned by applying a very high electrical current to the motor and varying the polarity of the current with a variable duty cycle to obtain the maximum cleaning currents in a relatively short time without dismantling the motors.
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申请公布号 |
US6191542(B1) |
申请公布日期 |
2001.02.20 |
申请号 |
US19990438514 |
申请日期 |
1999.11.12 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
CHLIWNYJ ALEX |
分类号 |
G11B33/12;G11B15/00;G11B15/54;H01R39/46;H02K15/00;H02P7/06;H02P7/29;(IPC1-7):H02P5/46 |
主分类号 |
G11B33/12 |
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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