Current-Sensorless Robust Sliding Mode Control for the DC-DC Buck Converter
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A current-sensorless PWM-based robust sliding mode Controller for the DC-DC Buck Converter is proposed. An extended state observer is used to estimate a lumped uncertainty that comprises the uncertain load and input voltage and also to estimate the derivative of the output voltage. A linear sliding surface is used to derive the controller that is simple in its design and yet exhibits excellent features in term of external disturbance suppression. Its robustness is validated by computer simulations using converter examples from two recent studies. Future work will be the validation of these results experimentally.
