DC power supply apparatus
US6188585A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2000 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Feb 18, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/3381
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A small-sized DC power supply apparatus adapted for receiving input commercial AC voltages of different value includes an AC-to-DC converter 4 which converts an input commercial AC voltage to a first DC voltage. The first DC voltage is converted to a high-frequency voltage in an inverter 10 including IGBTs 10a-10d which are rendered conductive when a conduction control signal is applied thereto. A transformer 12 transforms the high-frequency voltage, which is, then, converted to a second DC voltage in a high-frequency-to-DC converter 16 for application to a load 22. The conduction control signal with a pause period disposed therein is generated in a controller 14. The conduction control signal occurs at a fixed period. The pause period disposed between the successive occurrences of the conduction control signal becomes longer as the input commercial AC voltage is higher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.