Power supply device with improved efficiency and reduced higher harmonics
US6028778A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 1998 |
| Grant date | Feb 22, 2000 |
| Priority date | — |
| Expiry date | Apr 2, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a power supply circuit, a rectification circuit is coupled to a partial smoothing circuit, and an inverting circuit. The rectification circuit includes a rectifier coupled to a primary capacitor. The partial smoothing circuit includes a first, second, and third diode coupled together with the third diode in reverse polarity with the first and second diodes. The partial smoothing circuit also includes a series combination of a choke coil and a smoothing capacitor disposed in parallel with the second diode. A diode extends from the partial smoothing circuit to the inverting circuit. In one embodiment, the inverting circuit includes a main capacitor in parallel with a combination of a winding and an auxiliary capacitor. A switching means is coupled to the inverting circuit and the rectification circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.