System for controlling drive of stepping motor
US5648710A · kind A · utility
48Cited by
5References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Nov 14, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/34
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A drive control system for a stepping motor prevents erroneous operation of a motor drive circuit due to the lack of coincidence between the logic level and an analog 0 voltage. This is accomplished by inhibiting an electric current from flowing by closing a gate circuit until a reference voltage for specifying a drive current into an input terminal reaches a specified voltage with respect to the ground potential, regardless of the output from a comparator to the terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.