Switching power supply with optimized THD and control method thereof
US9083245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2012 |
| Grant date | Jul 14, 2015 |
| Priority date | — |
| Expiry date | Aug 28, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply comprising a switching circuit and a controller. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The controller comprises a preprocessing circuit, a first multiplier, a first comparing circuit and a logic circuit. The preprocessing circuit generates a first multiplication input signal based on the input voltage and output voltage of the switching circuit. The first multiplier multiplies the first multiplication input signal by a second multiplication input signal and generates a first product signal. The first comparing circuit compares a current sensing signal representative of the input current with the first product signal and generates a first comparison signal. The logic circuit turns off a main switch in the switching circuit when the current sensing signal is larger than the first product signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.