Soft switching active snubber
US5828559A · kind A · utility
Inventor
Key dates
| Filing date | Feb 3, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Feb 3, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A soft switching device for electric power switching applications includes a switching element and a soft switching active snubber. The soft switching active snubber includes a capacitor, a rectifier and a soft switching active reset circuit. The capacitor connects in series with the rectifier and both of which connects across the switching element. The soft switching active reset circuit, connected across the rectifier as well as the capacitor, is responsive to a reset signal for active resetting of the capacitor within the normal switching cycle of the switching element. Energy absorbed by the capacitor is recovered to the input voltage source or to the load. This occurs contemporaneous with the power switching operation of the switching element. With the active snubber, soft switching is provided for both the switching element and a snubber switch within the active reset circuit, for an efficient and reliable circuit operation. The active snubber also allows additional controls for implementing an intelligent soft switching device. The soft switching device is a complete self-contained circuit. Its operation does not depend on any external circuit components. It can be used as a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.