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. 06, 2016
Filed:
Nov. 06, 2015
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Kenichi Nishijima, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Abstract
An output voltage detection portion detects the change of a DC output voltage on a primary side of a transformer. A control circuit outputs a gate signal of a frequency corresponding to the detected change to stabilize the DC output voltage. A load transient detection portion includes capacitors and a capacitor and/or a resistor. The load transient detection portion detects the decrease of the DC output voltage caused by a load transient. Thus, when the control circuit is performing switching control in a long cycle under a light load, the load transient detection portion can detect a timing of the load transient without waiting until the next cycle switching so that the control circuit can vary the frequency of the gate signal to a frequency corresponding to a heavy load. Accordingly, it is possible to suppress the decrease of the DC output voltage at the time of the load transient.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile