FAST TERMINAL SLIDING MODE CONTROLLER DESIGN WITH A NEW STRUCTURE FOR DC-DC BUCK CONVERTER

ARTICLE INFORMATION ABSTRACT Original Research Paper Received 22 October 2015 Accepted 27 January 2016 Available Online 2 February 2016 A DC-DC buck converter is an electronic circuit with wide application in power electronics. This converter acts as a nonlinear system, so it is necessary to use a robust controller to control and regulate the output voltage under load changes, circuit elements and other disturbances. In this paper, a new fast terminal sliding mode control (FTSMC) using the property of the terminal attraction as a function of the inverse tangent for buck DC-DC converter is provided. The performance of this new controller is compared with FTSMC common type in terms of output voltage convergence time and input control function structure. The superior property of this controller is its low singular effect on the control function. Also, this controller has fast transient convergence in different situations for output voltage stability. Simulation results confirm the proper performance of the new proposed fast terminal sliding mode control method compared to traditional fast terminal sliding mode converter for DC-DC buck converter.

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