Practical Implementation of Sliding Mode Control for Boost Converter

Abstract

The sliding mode control (SMC) represents a powerful tool to enhance performances of power converters. This control technique has a less circuit complexity unlike other standard current-mode controllers. It also provides extreme robustness and fast response against supply, load and circuit parameter variations, even for higher-order converters. Limited numbers of research publications are available with hardware implementation of SMC in switching power converters. Most of the people have discussed this control using a buck converter having a perfect variable structure. This paper presents a simulation study of SMC applied to a boost converter (Non minimum phase system) using a new model developed by the authors. MATLAB/SIMULINK is used for simulation studies. Simulation results are practically verified by implementing controller on a prototype board.

Qualified Analysis of DSMC over SMC for Boost Converter

“…The discrete model of boost converter based SMC is represented by the following equations (8,9), equation (8) Figure 6 shows the simulated output for SMC based Boost Converter with step change in input voltage from 5v to 6v, Figure 7. Shows the control Signal for SMC based Boost Converter for step change in input voltage.…”

“…Figure 11 shows the control signal for DSMC based Boost Converter for step input voltage change from 5v to 6v. Figure 12 shows the control signal for DSMC based Boost Converter for step change in input [8,9]. …”

Implementation of dual‐loop controller for positive output elementary Luo converter

“…Combining 2, 3and 4, the equivalent control signal is derived by equating the derivative of S(x) to zero [20,21].…”

“…S ( x ) is given by (3) Combining (2), (3) and (4), the equivalent control signal is derived by equating the derivative of S ( x ) to zero [20, 21].…”

Sliding mode controller for buck DC-DC Converter

“…The use of sliding mode control enable to improved and even overcome the deficiency of the control method based on small signal models. In particular, sliding mode control improves the dynamic behaviour of the system, endowing it with characteristics such as robustness against changes in the load, uncertain system parameters and simple implementation [2].…”