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. 18, 2019
Filed:
Jul. 30, 2018
Universal Lighting Technologies, Inc., Madison, AL (US);
Wei Xiong, Madison, AL (US);
Travis L. Berry, Madison, AL (US);
Universal Lighting Technologies, Inc., Madison, AL (US);
Abstract
A DC-to-AC inverter provides an AC voltage to the primary winding of an output isolation transformer having at least one secondary winding and having an auxiliary winding. The current supplied to a secondary load is reflected back into the primary winding as a reflected secondary current. A first feedback signal has a reflected secondary current component and has a primary magnetizing current component. An auxiliary winding voltage is applied to an inductor to generate an auxiliary current proportional to the primary winding magnetizing current. A second feedback signal is responsive to the auxiliary current. The second feedback signal is combined with the first feedback signal to produce a total feedback signal responsive only to the reflected secondary current. The DC-to-AC inverter responds to the total feedback signal and a reference signal to adjust the AC voltage to maintain the total feedback signal at a magnitude corresponding to the reference signal.