Title :
Sliding mode control of the DC-DC flyback converter with zero steady-state error
Author :
Salimi, Mahdi ; Soltani, Jafar ; Zakipour, A. ; Hajbani, V.
Author_Institution :
Dept. of Eng., Islamic Azad Univ., Ardabil, Iran
Abstract :
In this paper a novel approach for controlling the output voltage of the isolated flyback converter is presented using sliding mode controller. Due to non-minimum-phase nature of the converter and presence of a right-half-plan-zero in voltage transfer function, indirect regulation of the output voltage is applied. In the designed controller, simultaneous use of output voltage and transformer current feedbacks improves dynamic response of the controller. The sliding mode controller is developed so that in the final control law, integral of the output voltage error is present and consequently the output voltage error will be zero in the steady-state. Also, in order to measure transformer magnetizing current, simple and efficient method is proposed. Finally, in order to evaluate response of the controller, flyback converter is a simulated using MATLAB / Simulink.
Keywords :
DC-DC power convertors; mathematics computing; transformers; variable structure systems; DC-DC flyback converter; Matlab-Simulink; dynamic response; indirect regulation; nonminimum-phase nature; right-half-plan-zero; sliding mode control; transformer current feedbacks; transformer magnetizing current; voltage current feedbacks; voltage transfer function; zero steady-state error; Educational institutions; Frequency control; Frequency conversion; Process control; Software packages; Switches; Voltage control; Sliding mode controller; magnetizing inductance current measuring; non-minimum phase nature; steady-state voltage error; two-loop control;
Conference_Titel :
Power Electronics, Drive Systems and Technologies Conference (PEDSTC), 2013 4th
Conference_Location :
Tehran
Print_ISBN :
978-1-4673-4481-4
Electronic_ISBN :
978-1-4673-4483-8
DOI :
10.1109/PEDSTC.2013.6506695
