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:
Dec. 17, 2019
Filed:
Nov. 20, 2018
Applicant:
LT Lighting (Taiwan) Corp., Xiangshan Dist., Hsinchu, TW;
Inventor:
Geoffrey Wen-Tai Shuy, Taipei, TW;
Assignee:
LT LIGHTING (TAIWAN) CORP., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02M 7/53 (2006.01); H02J 9/06 (2006.01); G05F 1/67 (2006.01); H02J 3/38 (2006.01); H02M 3/156 (2006.01); H02M 7/537 (2006.01); H02M 1/00 (2006.01);
U.S. Cl.
CPC ...
H02J 9/062 (2013.01); G05F 1/67 (2013.01); H02J 3/385 (2013.01); H02M 3/156 (2013.01); H02M 7/537 (2013.01); H02M 2001/007 (2013.01);
Abstract
A sequential extraction control device for use in a 3-phase DC/AC converter. The 3-phase converter has three single-phase DC/AC converters, each controlled by a respective PWM extractor. Duty factor adjustments are made depending on a current portion of an AC power cycle. A sequential regulator causes the PWM extractors to have non-overlapping duty cycles such that extractions of each of the single-phase DC/AC converters is performed in sequence, rather than concurrently. This improves the efficiency in extracting power from the DC power.