Title :
On the basins of attraction of parallel connected buck switching converters
Author :
Huang, Yuehui ; Tse, Chi K.
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Hunghom
Abstract :
This paper describes the coexisting attractors of parallel connected buck switching converters under a master-slave current sharing scheme. We present the basins of attraction of desired and undesired attractors, which provide design information on the conditions for hot-swap operations. The system employs a typical proportional-integral (PI) controller for regulation. It is shown that the system will converge to different attractors for different initial conditions with the same control parameters. Simulation results are given to illustrate the phenomenon. This study is relevant to practical design. Specifically we show that the stability regions obtained from linear methods (i.e., considering only local stability) can be over-optimistic as the global stability regions are found to be more restrictive in the parameter space
Keywords :
PI control; stability; switching convertors; voltage regulators; hot-swap operations; master-slave current sharing scheme; parallel connected buck switching converters; proportional-integral controller; Buck converters; Chaos; Control systems; Master-slave; Pi control; Power supplies; Proportional control; Stability; Switching converters; Thermal stresses;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693916