Power supply circuit
US5459650A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 24, 1992 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Sep 24, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transformer has a secondary winding with an intermediate tap. Two switching elements are connected in series between terminals of the primary winding. A dc power source is connected between a connecting point of the switching elements and the intermediate tap of the primary winding. By turning on and off the switching elements alternately, parallel resonance is produced by primary self inductance and a capacitor provided on the primary side of the transformer. Series resonance is produced by leakage inductance between the primary and secondary sides and a capacitor provided on the secondary side. Turning on of the switching elements at a zero-voltage state and turning off of the switching elements at a zero-current state are realized. Since this transformer is a push-pull type one, currents flowing through the switching elements are reduced to half of a half bridge type transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.