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. 20, 2016
Filed:
Sep. 17, 2012
Lian Zheng Electronic (Shenzhen) Co., Ltd., Guangdong, CN;
Kaijun Xie, Shenzhen, CN;
Wuhua Hu, Shenzhen, CN;
Abstract
The present invention relates to a control method for supporting active power factor correction (APFC) loads, comprising: providing square wave width of an output voltage waveform to be a comparatively large value to improve effective value of the output voltage, in order to meet the requirements for active power factor correction (APFC) loads; and gradually decreasing square wave width of the output voltage waveform from the comparatively large value to a comparatively small value to gradually decrease effective value of the output voltage to a desirable stable voltage effective value. The present invention further relates to a control system for supporting active power factor correction (APFC) loads, comprising: a voltage increasing unit for providing square wave width of an output voltage waveform to be a comparatively large value to improve effective value of the output voltage, in order to meet the requirements for active power factor correction (APFC) loads; and a voltage stabilizing unit for adjusting square wave width to a comparatively large value, and gradually decreasing square wave width of the output voltage waveform from the comparatively large value to a comparatively small value to gradually decrease effective value of the output voltage to a desirable stable voltage effective value.