The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 06, 2010
Filed:
Apr. 02, 2007
Russell Jacques, Withersfield, GB;
Paul Ryan, Cambridgeshire, GB;
Catriona Mckay, Hertfordshire, GB;
Devarahandi Indika Mahesh DE Silva, Cambridgeshire, GB;
David M. Garner, London, GB;
Vinod A. Lalithambika, Cambridgeshire, GB;
Russell Jacques, Withersfield, GB;
Paul Ryan, Cambridgeshire, GB;
Catriona McKay, Hertfordshire, GB;
Devarahandi Indika Mahesh de Silva, Cambridgeshire, GB;
David M. Garner, London, GB;
Vinod A. Lalithambika, Cambridgeshire, GB;
Abstract
This invention relates to control techniques and controllers for resonant discontinuous forward power converters (RDFCs). A controller for 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 controller having a primary sense input to sense a primary winding signal, said primary winding signal representing a voltage across said primary winding or across an additional winding coupled to said primary winding, and wherein said controller is configured to switch on said switch in response to detection of a reduction in a rate of change of said primary winding signal below a threshold, adjacent a substantially minimum value in an operational cycle of said sensed primary winding signal to convey power to said DC output.