Control circuit for outputting pulse width modulation control signal with zero-crossing detection
US10461628B1 · kind B1 · utility
6Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2018 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Dec 24, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P80/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a control circuit and a control method, where the control circuit includes: a signal detection unit, a ZCD signal acquisition unit, a signal selection unit, a frequency limiting unit, and a PWM control signal generation unit; where the signal detection unit, the ZCD signal acquisition unit, the signal selection unit, the frequency limiting unit, and the PWM control signal generation unit are connected in cascade. The control circuit and the control method provided in the present disclosure reduce processing delay of a ZCD signal and improve signal processing accuracy of a PFC system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.