Title :
State trajectory prediction control for boost converters
Author :
Leung, Kelvin K S ; Chung, Henry S H
Author_Institution :
Dept. of Electron. Eng., Hong Kong City Univ., Kowloon, China
Abstract :
Boost and flyback converters have a right-half-plane zero in their control-to-output transfer function. This property makes the controller difficult to be designed with the classical frequency-domain approach to ensure good output regulation and fast response over the wide frequency bandwidth of input voltage and output load perturbations. Instead of a small signal design approach, this paper presents a cycle-by-cycle state trajectory prediction (STP) control method for boost converters. The method is based on predicting the output voltage after a hypothesized switching action. The output can revert to steady state in two switching actions under large-signal input voltage and output load disturbances. Theoretical predictions are verified with experimental results of a 120W 18/24V prototype.
Keywords :
DC-DC power convertors; electric variables control; frequency-domain synthesis; switching convertors; 120 W; 18 V; 24 V; boost converters; control-to-output transfer function; cycle-by-cycle STP control; flyback converters; frequency bandwidth; frequency-domain approach; input voltage; output load disturbance; output load perturbation; output regulation; output voltage prediction; right-half-plane zero; state trajectory prediction control; steady state; Bandwidth; Capacitors; Sliding mode control; Steady-state; Switches; Switching converters; Topology; Trajectory; Transfer functions; Voltage control;
Conference_Titel :
Circuits and Systems, 2004. ISCAS '04. Proceedings of the 2004 International Symposium on
Print_ISBN :
0-7803-8251-X
DOI :
10.1109/ISCAS.2004.1329720
