DC power supply apparatus
US5926381A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1998 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/25
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A DC power supply apparatus includes an input-side rectifier which rectifies an input AC voltage and supplies the rectified voltage to a voltage-boosting converter. The voltage-boosting converter converts the supplied voltage to a voltage of a predetermined magnitude. The predetermined magnitude voltage is, then, converted to a high-frequency voltage by an inverter and applied to a primary winding of a transformer. An output-side rectifier rectifies a high-frequency voltage induced in a secondary winding of the transformer. The inverter includes IGBTs and diodes, which are connected in a full-bridge configuration. A capacitor is connected in parallel with each IGBT. When the IGBTs are rendered conductive by the charging and discharging of the capacitors, no current flows through the IGBTs, and when the IGBTs are rendered nonconductive, the voltages applied to the IGBTs are made to become zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.