Snubber circuit for switching power supply
US5548503A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1994 |
| Grant date | Aug 20, 1996 |
| Priority date | — |
| Expiry date | Jun 16, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/10
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention provides a snubber circuit for a switching power supply that generates rectified direct current power from an inductive load cyclically connected and disconnected by two switching means fed by a direct current power supply. To reduce turn-on and turn-off loss of the switching means and increase switching frequency by reducing power loss in the snubber circuit, the snubber circuit according to the present invention absorbs counter-electromotive force generated during turn-off of the switching means. Turn-on loss of the switching means is reduced because a current from the switching means does not flow through the snubber circuit when the switching means are turned on. Power consumption in the snubber circuit is reduced and energy is efficiently utilized, because energy, stored in the snubber circuit in association with counter-electromotive force absorption from the inductive load when the switching means are turned off, is regenerated during subsequent turned-off period and turning-on action of the switching means. Additionally, transient voltage spikes are not applied to the switching means during turn-off because the counter-electromotive force is more quick…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.