Patent · US Active

Forward power converter controllers

US7714554B2 · kind B2 · utility

8Cited by
20References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateApr 2, 2007
Grant dateMay 11, 2010
Priority date
Expiry dateDec 1, 2027

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02B70/10
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

This invention relates to control techniques and controllers for resonant discontinuous forward power converters (RDFCs).A method of controlling a resonant discontinuous forward converter (RDFC), said converter including a transformer with primary and secondary matched polarity windings and a switch to, in operation, cyclically switch DC power to said primary winding of said transformer, said converter further having a DC output coupled to said secondary winding of said converter, said method comprising: sensing a transformer signal, said transformer signal representing a voltage across a winding of said transformer or a resonant current in a winding of said transformer; calculating a resonance period of said RDFC from said sensed transformer signal; and controlling an off duration of said switch in response to said calculated resonance period such that a sub-harmonic oscillation in said resonant voltage across said primary winding is reduced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.