Sliding mode control for buck-boost converter using control desk dSPACE/sup /spl trade//

Switch mode power supplies have been controlled using different control algorithms like PID control, current mode programmed control etc. Many control tools were used to implement these control techniques e.g. analog operational amplifier, microprocessor. This paper focuses on using a new control tool called dSPACE/sup /spl trade// for controlling the switch mode power supply. Programming the control circuit via MATLAB/Simulink/sup /spl trade// can be made. The prototype of the basic three converters buck, boost, and buck-boost can be controlled by the simulation model via real time hardware. Buck-boost converter was chosen as our prototype converter. The sliding mode control (SMC) was chosen as a control algorithm in MATLAB/Simulink/sup /spl trade// for controlling the buck-boost prototype model. The reason behind choosing SMC is that it is an efficient control and simple to implement in MATLAB/Simulink/sup /spl trade//. The paper shows that the control algorithm represented by SMC in MATLAB/Simulink/sup /spl trade// and using the dSPACE/sup /spl trade// as control toolbox is able to control the prototype model.