Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 20, Issue 6, Pages 1379-1392Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2005.857556
Keywords
buck converter; fixed-frequency; hysteresis-modulation; pulsewidth modulation (PWM); quasi-sliding-mode (QSM); sliding-mode (SM) control
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This paper presents the design and analysis of a fixed-frequency pulsewidth modulation (PWM)-based quasi-sliding-mode voltage controller for buck converters from a circuit design perspective. A practical design approach that aims at systematizing the procedure for the selection of the control parameters is presented. In addition, a simple analog form of the controller for practical realization is provided. The resulting controller exhibits the same structure as a PWM proportional derivative (PD) linear controller, but with an additional component consisting of the instantaneous input voltage and the instantaneous output voltage. Simulation and experimental results show that the performance of the converter agrees with the theoretical design.
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