Switching power source apparatus
US6324081A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 2000 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Oct 20, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A switching power source apparatus reduces power loss and improves conversion efficiency of a switching power source part by rectifying and smoothing a commercially available alternating power source supplied to an oscillation drive circuit and a switching circuit part that constitutes a half-bridge circuit. An output of the half-bridge circuit is grounded via a resonance capacitor, a choke coil, and a primary winding of an insulated type converter transformer. This converter transformer has a secondary winding for obtaining a +B voltage and high-voltage windings for obtaining a high-level output voltage. Further, fluctuation in the voltage of the high-level output voltage is supplied to the oscillation drive circuit via resistors, a control circuit, and a photo-coupler, whereby the switching circuit part is controlled. The secondary winding is connected in series to a saturable reactor, so that by controlling the inductance of this saturable reactor, the +B voltage taken out from the secondary winding is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.