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Title: Adaptive feedforward and feedback control schemes for sliding mode controlled power converters
Authors: Tan, SC
Lai, YM 
Tse, CKM 
Cheung, MKH
Keywords: Adaptive feedback control
Adaptive feedforward control
Buck converter
Hysteresis modulation
Pulse-width-modulation (PWM)
Sliding mode (SM) control
Issue Date: Jan-2006
Publisher: IEEE
Source: IEEE transactions on power electronics, Jan. 2006, v. 21, no. 1, p. 182-192 How to cite?
Journal: IEEE transactions on power electronics 
Abstract: A major disadvantage of applying sliding mode control to dc/dc converters is that the steady-state switching frequency is affected by line and load variations. This is undesirable as it complicates the design of the input and output filters. To reduce switching frequency deviation in the events of line and load variations, an adaptive feedforward control scheme that varies the hysteresis band according to the change of line input voltage and an adaptive feedback control scheme that varies the control parameter (i.e., sliding coefficient) according to the change of the output load are proposed. This paper presents a thorough investigation into the problem and the effectiveness of the proposed solutions. In addition, methods of implementing the proposed adaptive control strategies are discussed. Experimental results confirm that the adaptive control schemes are capable of reducing the switching frequency variations caused by both line and load variations.
ISSN: 0885-8993
DOI: 10.1109/TPEL.2005.861191
Rights: © 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
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