Switching power source means
US5027263A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1989 |
| Grant date | Jun 25, 1991 |
| Priority date | — |
| Expiry date | Mar 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power source means comprises a DC voltage source, a first switch element, a low-pass filter connectable to the DC voltage source through the first switch element, and a second switch element connected to the input end of the low-pass filter, the switch elements being coupled to the DC voltage source either directly or through a transformer and being operable in such a manner that an output of DC or AC of a desired frequency can be derived across the output end of the low-pass filter. With the invention, a reactor is connected in parallel across the input end of the low-pass filter, which reactor being is adapted to charge and discharge parasitic capacitances of the switch elements, thus preventing surge currents in the switch elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.