Excitation device for electromagnetic actuator
US5045766A · kind A · utility
10Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 23, 1990 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | May 23, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device for the electrical excitation of the coil or coils of an electromagnetic actuator, especially that of a linear motor, the coil of which has a low self-inductance. This coil is supplied by a bridge of transistors. The error between a reference voltage and a voltage proportional to the current in this coil is used to turn off a pair of transistors of the bridge, and simultaneously saturate a transistor of the other pair and make the other transistor work in linear mode. Two electronic switches and one sign discriminator are used to this end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.