Abstract
The poor dynamic performance problem of a Full-Bridge converter under a traditional control strategy is investigated in this study. A new parameter adaptive terminal sliding mode control policy is developed for a Full-Bridge DC-DC converter, by combining the integral part with the power function and differential function in the design of the sliding surface. In theory, the steady-state error of the system can approach zero within a short time. To manage the un-ideal situation after using a fixed value of power γ, an improved γ adaptive algorithm is proposed. The system output is tracked and γ is adjusted in real time. The effect of the system can be guaranteed always in an optimal state. Finally, simulation results are provided to verify the performance of the proposed design method under different conditions.
Highlights
Driven by the continuous development of new energy vehicles and battery energy storage technology, the Full-Bridge converter has been widely applied in various fields owing to its high power density, high voltage conversion ratio, and low switching loss
In [15], the full-order sliding mode control strategy can be applied to the Full-Bridge converter and, improved the robustness and regulation performance of the system
Simulation results verified that the proposed control strategy yielded better results than the traditional PI control in terms of speed and robustness
Summary
Driven by the continuous development of new energy vehicles and battery energy storage technology, the Full-Bridge converter has been widely applied in various fields owing to its high power density, high voltage conversion ratio, and low switching loss. The control strategy designed for the Buck circuit cannot be directly applied to the Full-Bridge converter, which requires the transformation of an equivalent control amount. In [15], the full-order sliding mode control strategy can be applied to the Full-Bridge converter and, improved the robustness and regulation performance of the system. Based on the discussion and analysis above, a terminal sliding mode controller with a simple application, strong dynamic recovery performance, and parameter adaptation for FullBridge converters was designed in this study.
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