Electrical circuit for regulating the current in the windings of certain step motors
US4229685A · kind A · utility
2Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 18, 1978 |
| Grant date | Oct 21, 1980 |
| Priority date | — |
| Expiry date | Apr 18, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The disclosed circuit is for controlling step motors of the type which have access only to a common winding neutral point or to partial neutral points. A switching transistor switches a low-loss circuit into the motor drive circuit for free running of the motor. A common circuit common to all the windings is switched in for rapid switching off of the current in the windings and for recovery of the energy stored in the inductors of the circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.