Relay drive circuit
US6236552A · kind A · utility
8Cited by
12References
2Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Oct 31, 1997 |
| Grant date | May 22, 2001 |
| Priority date | — |
| Expiry date | Oct 31, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A relay driving circuit comprises, in addition to an in-car battery, a low-voltage power supply outputting a voltage lower than an output voltage of the in-car battery and higher than a relay actuating voltage. The output voltage of the low-voltage power supply is applied to a coil of a relay. Alternatively, the output voltage of the in-car battery may be applied to each relay coil for turning on the relay contacts, then the output voltage of the low-voltage power supply is applied to maintain the turning-on state of the relay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.