DC to AC power conversion with resonance valley detection
US9184672B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2013 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Dec 19, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC-to-AC power conversion method is provided, including: generating an AC reference signal and an AC zero crossing detection signal; generating an error signal based on the AC reference signal and an output current or an output voltage at an AC output terminal; generating a turn-off signal based on the error signal and an input current at a DC input terminal; detecting or predicting a valley voltage of a resonance voltage to generate a turn-on signal; generating first, second, third and fourth switching signals based on the AC zero crossing detection signal, the turn-off signal and the turn-on signal; and controlling first, second, third and fourth switching elements of power conversion modules with the first, second, third and fourth switching signals, to enable the first and second power conversion modules to convert the input current of the DC input terminal to the output current of the AC output terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.