发明名称 |
Motor speed regulating circuit with starter and storage medium drive using the same |
摘要 |
A motor speed regulating circuit includes a speed signal generator for generating a speed signal having a frequency proportional to the speed of the motor, synchronously with the rotation of the motor. A time difference detector is used for detecting a time difference between the period of the speed signal and a predetermined standard time. A control voltage generator is used for generating a speed control voltage to be applied to the motor in accordance with a detected time difference and feedback-controlling the speed of the motor in accordance with the standard time. A starter is used for starting the motor after the motor is stopped. The motor can be reliably restarted after it has been stopped.
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申请公布号 |
US5621288(A) |
申请公布日期 |
1997.04.15 |
申请号 |
US19940340372 |
申请日期 |
1994.11.14 |
申请人 |
HITACHI, LTD. |
发明人 |
SEKI, KUNIO;TSUNODA, TOSHIYUKI;OHKUBO, YUICHI |
分类号 |
G11B19/20;G11B19/28;H02P6/06;H02P6/16;H02P6/20;(IPC1-7):H02P1/18 |
主分类号 |
G11B19/20 |
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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