Title :
Exact orbital stability analysis of static and dynamic ramp compensations in DC-DC converters
Author :
Fang, Chung-Chieh
Author_Institution :
Logic Libr. Dept., Taiwan Semicond. Manuf. Co., Hsinchu, Taiwan
Abstract :
Exact orbital stability of static linear, static quadratic, and dynamic ramp compensations in current mode control for DC-DC converters is considered. On static linear ramp compensation, a well-known stability criterion is re-examined. This stability criterion, based on inductor current dynamics, is shown to be an approximate and necessary (but not sufficient) condition for system stability. A new approach based on sampled-data modeling is proposed to determine the right ramp slope to stabilize the system. On static quadratic and dynamic ramp compensations, new stabilization schemes are proposed, without changing the nominal steady-state condition
Keywords :
DC-DC power convertors; compensation; electric current control; inductors; sampled data systems; stability; current mode control; dynamic ramp compensation; exact orbital stability analysis; inductor current dynamics; nominal steady-state condition; sampled-data modeling; stability criterion; static linear compensation; static quadratic compensation; static ramp compensation; DC-DC power converters; Inductors; Libraries; Logic; Power system modeling; Predictive models; Semiconductor device manufacture; Stability analysis; Stability criteria; Steady-state;
Conference_Titel :
Industrial Electronics, 2001. Proceedings. ISIE 2001. IEEE International Symposium on
Conference_Location :
Pusan
Print_ISBN :
0-7803-7090-2
DOI :
10.1109/ISIE.2001.932045
