Switching power supply with electronic isolation
US5345376A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Feb 19, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/158
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching power supply that converts an input AC or DC voltage to a regulated output DC voltage while offering electrical isolation between the input and output stages through use of solid state switches and charge storage devices in place of isolation transformer used in traditional systems. The power supply uses two series connected switching blocks that alternately charge and discharge a storage capacitor, wherein each switching block includes a pair of switches which may be turned on and off with a duty cycle adjusted by a controller. The duty cycle and on time of each block is adjusted such that respective blocks are never turned on at the same time, thereby providing electrical isolation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.