发明名称 |
METHOD AND DEVICE FOR CONTROLLING A STEP MOTOR |
摘要 |
The rotor of a stepping motor may remain blocked in an intermediate position different from a rest position if its control circuit adjusts the electric energy of the driving pulses to the minimum corresponding to the actual mechanical load of the motor determined by a measuring circuit. To remove this risk, the method consists in producing with the aid of a generator and applying to the motor, pulses which allow release of the rotor when it has remained blocked in an intermediate position in response to a driving pulse. The release pulses are distinct from any correction pulses which are applied in known manner to make up a lost step. The release pulses precede the correction pulses and are preferably of such polarity as to return the rotor to its starting position to ensure correct action of the ensuing correction pulses. This method applies in particular to the control of the stepping motor of an electronic timepiece. |
申请公布号 |
DE3372022(D1) |
申请公布日期 |
1987.07.16 |
申请号 |
DE19833372022 |
申请日期 |
1983.10.05 |
申请人 |
ETA S.A., FABRIQUES D'EBAUCHES |
发明人 |
GUERIN, YVES |
分类号 |
G04C3/14;H02P8/02;(IPC1-7):G04C3/14 |
主分类号 |
G04C3/14 |
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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