Three state driver for inductive loads
US4496886A · kind A · utility
21Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1982 |
| Grant date | Jan 29, 1985 |
| Priority date | — |
| Expiry date | Nov 8, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P25/092
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A three state driver for an inductive load, e.g., a stator winding of a variable reluctance motor, allows the use of charge, idle, and discharge states in which a positive voltage, a short, and a reverse voltage are connected across the inductive load, respectively. An H-bridge comprising two electronic switches and two diodes is used to switch the inductive load voltages as commanded by a comparator circuit which compares the load current to a desired load current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.