Stepping motor drive control circuit
US6323617A · kind A · utility
3Cited by
4References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1999 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Oct 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A stepping motor preferably applied to an image reading motor for a facsimile device or the like, drives the rotation with low noise by repeating turning-on and turning-off switching of the driving voltage in the stepping motor when a change of the exciting phase in the stepping motor is not continued for a constant time and performing the repeated switching for a predetermined cycle. At the same time the present motor can prevent the passage of current through all of four phase coils by the manner that a pair of phases in the stepping motor are not simultaneously driven.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.