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:
Sep. 01, 2015
Filed:
Mar. 14, 2012
Tai Keung Lee, Ma On Shan, HK;
Wing Ling Cheng, Taipo, HK;
Xiao Fen Zhong, Shen Zhen, CN;
Yi Cai, Shen Zhen, CN;
Tai Keung Lee, Ma On Shan, HK;
Wing Ling Cheng, Taipo, HK;
Xiao Fen Zhong, Shen Zhen, CN;
Yi Cai, Shen Zhen, CN;
ASTEC INTERNATIONAL LIMITED, Kwun Tong, Kowloon, HK;
Abstract
A resonant converter apparatus includes a plurality of resonant converters connected in parallel, and a control module outputting a pulse width modulation (PWM) control signal to the resonant converters. The control module includes a voltage control loop and a circuit control loop. The voltage control loop compares the sensed output voltage with a predetermined reference voltage, and outputs a PWM control signal to one of the resonant converters so the output voltage of the one converter is equal to the predetermined reference voltage. The current control loop uses the sensed output current of the one converter as a reference current, compares the reference current with the sensed output current from each of the other resonant converters, generates a frequency adjusting variable, and calculates the individual PWM control signal for each of the other converters so the output currents of the plurality of converters are the same.