Title :
Constant-Frequency Peak-Ripple-Based Control of Buck Converter in CCM: Review, Unification, and Duality
Author :
Guohua Zhou ; Jianping Xu ; Jinping Wang
Author_Institution :
Sch. of Electr. Eng., Southwest Jiaotong Univ., Chengdu, China
Abstract :
The operation principles of peak current control, V2 control, and enhanced- V2 control of buck converter in continuous conduction mode are reviewed and compared. By the use of weight factors of inductor current and output voltage, they are unified as constant-frequency peak-ripple-based (CF-PR) analog control. It is revealed that conventional peak current control and V2 control are two boundaries of the unified CF-PR control. The duality items between CF-PR control and constant-frequency valley-ripple-based (CF-VR) control are proposed. As the duality of CF-PR analog control, CF-VR analog control is investigated. Unified CF-PR and CF-VR digital control laws with different modulations and their stabilities are investigated in terms of the duality. Experimental results verify the theory analysis.
Keywords :
PWM power convertors; digital control; electric current control; inductors; CCM; V2 control; buck converter; constant-frequency peak-ripple-based analog control; constant-frequency valley-ripple-based control; continuous conduction mode; duality item; inductor current; peak current control; pulsewidth modulation; unified CF-PR digital control law; unified CF-VR digital control law; $V^{2}C$ control; $V^{2}$ control; Current-mode control; digital control; enhanced- $V^{2}$ control; pulsewidth modulation (PWM); ripple-based control; switching converter;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2013.2257143
