Method and apparatus for extending the operating range of a flyforward converter
US7209371B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2006 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | May 12, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/33569
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A technique for extending the operating range of a flyforward converter to low input voltages. In one aspect, power converter includes a positive input supply rail and a negative input supply rail. A power converter input voltage is to be applied between the positive and negative input supply rails. A flyback energy transfer element having a first input winding and a forward energy transfer element having a forward input winding are also included. The flyback and forward input windings are coupled between the positive and negative input supply rails. Voltage control circuitry coupled to the forward energy transfer element is also included to reduce a voltage across the forward input winding, substantially to zero, when the power converter input voltage falls below a first threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.