Switch control device with zero-cross point estimation by edge detection, power supply device comprising the same, and switch control method with zero-cross point estimation by edge detection
US9000744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2011 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Aug 10, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/392
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided are a switch control device, a switch control method, and a power supply device. The present invention generates power voltage required to operate the switch control device by using full-wave current rectification voltage generated by rectifying an AC input and detects a zero cross-point when a full-wave rectification voltage is zero voltage by using the edge of power voltage. The present invention generates a reference signal synchronized to the full-wave rectification voltage by using the detected zero cross-point and controls a switching operation of a power switch by comparing a reference signal with current which flows on the power switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.