Title :
Analysis and Design of an Automatic-Current-Sharing Control Based on Average-Current Mode for Parallel Boost Converters
Author :
Xiao, Wenxun ; Zhang, Bo ; Qiu, Dongyuan
Author_Institution :
Electr. Power Coll., South China Univ. of Technol., Guangzhou
Abstract :
This paper presents an automatic-current-sharing control method based on average-current mode for parallel boost converters. With the proposed method, the second-order system of the external loop of boost converter is reduced to a first-order in low frequency, which makes the design of the control circuit easy and improves the dynamic response of parallel boost converters. This paper presents detail analysis and improved design guidelines for the proposed control system. The multi-module parallel number is limitless in theory. Two 40 V/120 V/4.2 A boost converters have been designed for parallel experiment, verifying the correctness of the theory analysis
Keywords :
DC-DC power convertors; control systems; electric current control; voltage control; 120 V; 4.2 A; 40 V; DC-DC converters; automatic-current-sharing control; average-current mode; control circuit design; current loop; multimodule parallel number; parallel boost converters; second-order system; three-loop control; voltage loop; Automatic control; Bandwidth; Circuits; Control systems; Guidelines; Power system dynamics; Power system reliability; Pulse width modulation; Transfer functions; Voltage control; Automatic-current-sharing technique; Average-current mode; Three-loop control;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778198
