Switching power supply having low loss characteristics
US6246594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2000 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Jul 18, 2020 |
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 having low loss includes two sub switching elements connected in series, which are then connected in parallel with a bridge circuit. A resonance coil and a sub primary winding are connected between a connection point of the series connection circuits and an output terminal of the bridge circuit. Resonance capacitors are respectively connected in parallel with each main switching element constituting the bridge circuit so as to resonate with the resonance coil. Voltages across the two ends of A phase and B phase sub secondary windings magnetically coupled to the sub primary winding are clamped to the supply voltage. A fixed voltage in proportion to the turns ratio is generated in the sub primary winding. A voltage applied to the resonance coil becomes small, and current fluctuation becomes small. Also, two sub switching elements connected in series are then connected in parallel with a main bridge circuit; and a resonance coil and auxiliary primary winding are connected between a connection point C of the series connection circuits and an output terminal B of the main bridge circuit. Resonance capacitors are respectively connected in parallel with each main …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.