Stepping motor drive device
US4812727A · kind A · utility
15Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1987 |
| Grant date | Mar 14, 1989 |
| Priority date | — |
| Expiry date | Oct 9, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepping motor drive device including a comparator for comparing the number of drive steps with a prescribed value and a control circuit for changing the operation of the stepping motor between a 1-2 phase excitation drive mode and a 2-phase excitation drive mode based on the comparison result of the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.