Title :
Instability and bifurcation in parallel-connected buck converters under a master-slave current sharing scheme
Author :
Iu, Herbert H C ; Tse, Chi K.
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech., China
Abstract :
This paper describes the bifurcation phenomena of a system of parallel-connected DC/DC buck converters. The results provide useful information for the design of stable current sharing in a master-slave connection configuration. Computer simulations are performed to capture the effects of variation of some chosen parameters on the qualitative behaviour of the system. It is found that while variation of the voltage feedback gains leads to standard period-doubling bifurcation, variation of the current sharing ratio leads to border collision bifurcation. Analysis is presented to establish the possibility of the bifurcation phenomena and to locate the current sharing ratio at which border collision occurs
Keywords :
DC-DC power convertors; bifurcation; electric current control; feedback; stability; bifurcation; border collision; border collision bifurcation; computer simulations; current sharing ratio; instability; master-slave connection configuration; master-slave current sharing scheme; parallel-connected buck converters; period-doubling bifurcation; voltage feedback gains; Bifurcation; Buck converters; Control systems; DC-DC power converters; Force control; Master-slave; Pulse width modulation; Pulse width modulation converters; Switches; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2000. PESC 00. 2000 IEEE 31st Annual
Conference_Location :
Galway
Print_ISBN :
0-7803-5692-6
DOI :
10.1109/PESC.2000.879903