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:
Jun. 07, 2016
Filed:
Apr. 27, 2012
Jamie Kelly, North Shields Tyne & Wear, GB;
Deepak Makwana, Newcastle Upon Tyne, GB;
Kevin Mcdermott, Heaton Newcastle, GB;
Paul Dalby, Middlesbrough Cleveland, GB;
Wayne Bell, Broompark Durham, GB;
Jamie Kelly, North Shields Tyne & Wear, GB;
Deepak Makwana, Newcastle Upon Tyne, GB;
Kevin McDermott, Heaton Newcastle, GB;
Paul Dalby, Middlesbrough Cleveland, GB;
Wayne Bell, Broompark Durham, GB;
TRIDONIC GMBH & CO KG, Dornbirn, AT;
Abstract
A power factor correction circuit includes an inductor L1, a diode D1, a switch Q3 and a controller. An input voltage Vis applied to the inductor L1 which is cyclically discharged through the diode D1 by the operation of the switch Q3. The switch Q3 is controlled by the controllerwhich varies the on period of the switch Q3, during which the inductor is charged, for adjusting an output voltage Vtowards a target value V. The method includes obtaining an indication of the inductor L1 reaching a discharged state in response to the switch being in an off state. The controllermonitors at least one of the switch on period Tand the switch off period Tto identify when the input voltage Vis an alternating voltage AC input, and when it is likely to be a non-alternating voltage DC input. When a non alternating voltage is detected, steps may be taken to reduce interference.