Abstract:

For achieving good static and dynamic control characteristics,the PID-type sliding mode control strategy of Boost converter is studied in this paper.The voltage control state expression is given and the system model of Boost converter adopting PID-type sliding mode control is established.The function form of sliding mode surface is designed and the equivalent control expression of system is deduced.The smooth function method is adopted to reduce the chattering phenomenon,and the control expression with chattering elimination measure is presented.The selection method of sliding mode surface parameter is given.The simulation and experiment results validate that the Boost converter system adopting PID-type sliding mode control has good start-up and disturbance regulation characteristics.

Key words: Boost converter;sliding mode control;chattering;voltage error