Power supply circuit with symmetrically tapped auto-transformer
US4906859A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F30/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An auto-transformer has first and second input terminals and first, second and third output terminals, the second output terminal being connected to a center tap of a coil and the first and third output terminals being connected to such points of the coil which are symmetrical with respect to the center tap. The first and second input terminals are connected to such points of the coil which are symmetrical with respect to the center tap. A first group of loads is coupled across the first and second output terminals and a second group of loads is coupled across the second and third output terminals. By equalizing the load currents to the first and second groups, the total current of the auto-transformer can be made significantly small.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.