Relay drive unit
US8896981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2012 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | Dec 24, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H47/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A relay drive unit drives a relay by supplying a power source voltage from a battery. The relay drive unit includes a power source voltage detector, a drive signal generator, and a relay drive circuit. The power source voltage detector detects the power source voltage. The drive signal generator generates a PWM signal as a drive signal for maintaining the relay in an ON state. The PWM signal has a preset duty ratio according to a magnitude of the power source voltage detected by the power source voltage detector. The relay drive circuit turns a supply of the power source voltage from the battery on/off based on a duty ratio of the drive signal generated by the drive signal generator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.