Sliding Mode Control of Output Voltage in DC-DC Boost Converter Using PI Sliding Surface

The use of DC power supply is currently very widely used, one of reason is due to new renewable energy sources. Some of the basic forms of DC voltage regulators that we are commonly used are buck converter, boost converter, and buck-boost converter. The use of the converter depends on the application designed, for instance is an input voltage step-up, which is boost converter. This converter has instability in the output voltage when there is a sudden change in input voltage or load and a voltage drop on the semiconductor components in its converter. This phenomenon can be reduced by adding a controller using some kind of feedback. The controllers that used in this research are the fuzzy-PID controller and PI-SMC (Sliding Mode Controller). Sliding mode controller using PI structure in sliding surface is a nonlinear controller that can accelerate the system response to reach voltage reference and reduce the steady state error. The boost converter performance using proposed controller has quick response than using fuzzy-PID controller. This can be observed in this research when there is a change in the input voltage and load, it shows small recovery time and low voltage deviation.