DC-DC Buck Converter Control Using Super Twisting Sliding Mode Control

This paper presents voltage control in a DC-DC buck converter for the output tracking problem of DC-DC converters with varying in input voltage. Switching dc-dc converter systems are non-linear and time-varying in nature. Therefore, to achieve stable output voltage, a super twisting sliding mode controller algorithm (STWA) is proposed. The STWA is designed to reduce chattering effect and ensure the sliding surface converges in finite time. The performance of the STWA is compared to conventional SMC to evaluate its effectiveness in reducing chattering effects and improving steady-state error. The simulation results show that the STWA is able to improve chattering effect, transient performance, and reduce steady-state error. DC-DC buck converter systems are non-linear and time-varying in nature, and voltage control is necessary to track the output voltage of the converter. The proposed STWA is a sliding mode control algorithm that reduces chattering effect and ensures the sliding surface converges in finite time. The effectiveness of the STWA is evaluated by comparing its performance to conventional SMC. Simulation results show that the STWA is able to improve chattering effect, transient performance, and reduce steady-state error.