Pulse motor driving device, pulse motor driving method, timepiece device, and timepiece device control method
US6476579B1 · kind B1 · utility
9Cited by
3References
71Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2000 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Jun 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pulse motor driving device having a rotation detecting unit adapted to detect whether or not a pulse motor rotates. In this device, a control unit performs an operation of increasing the effective value of the driving power of the pulse motor and periodically performs an operation of lowering the effective value of the driving power thereof when it is detected by the rotation detecting unit that the pulse motor does not rotate. Further, the control unit interrupts the operation of lowering the effective value of the driving power of the pulse motor when a magnetic field is detected by a magnetic detecting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.