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. 28, 2016
Filed:
Aug. 29, 2011
Delai Jiang, Hangzhou, CN;
Jianhua Zou, Hangzhou, CN;
Guichao Hua, Hangzhou, CN;
INVENTRONICS (HANGZHOU), INC., Hangzhou, Zhejiang, CN;
Abstract
An auxiliary power supply circuit of a two wire dimmer, comprising: an auxiliary source capacitor () and a cutoff switch () constituting a series branch, a chopper switch () parallel-connected to the series branch, and a control device () connected to the chopper switch () and to the cutoff switch (). The control device () measures an auxiliary source voltage and receives a chopper voltage control signal (Vg), and outputs signals (Vand V), on the basis of the result of a comparison between the auxiliary source voltage and a preset voltage and of the state of the chopper voltage control signal (Vg), to control the on and off of the chopper switch () and of the cutoff switch () for controlling the charging of the auxiliary source capacitor (). The auxiliary power supply circuit has low losses, high efficiency, and is not limited by minimum chopper angle, and has low electromagnetic interference.