Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 30, Issue 12, Pages 7193-7201Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2015.2392371
Keywords
Constant power load; dc/dc converters; feedforward compensation; power converters
Categories
Funding
- Universidad Nacional del Sur
- CONICET
- ANPCyT, Argentina
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In this paper, a nonlinear control strategy for controlling a dc/dc buck converter feeding a constant power load is proposed. The main objective of the proposed controller is to improve the transient performance when in presence of unknown power disturbances. A feedback controller is combined with a feedforward strategy. A nonlinear reduced order observer is used for estimating the value of the power load and its time derivative. These estimated values are fed forward to the nonlinear feedback controller whose design is based on feedback linearization method. The proposed controller is tested via simulation and experimental results.
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