Design of State Feedback Controller for positive output elementary super-lift DC-DC Luo converter for Low Power Applications [articol]

Abstract

This paper focuses on modeling, simulation and hardware implementation of Positive Output Elementary Super-Lift (POESL) DC-DC Luo converter based on State Feedback Controller (SFC) for low power applications. POESL DC-DC Luo converter is widely used due to their simpler design, high voltage transfer gain, ease of use and cost effectiveness. The converter output voltage is enhanced stage by stage in arithmetic progression. To improve the dynamic response of the converter and to accomplish the voltage regulation against load and line fluctuations, a closed loop control technique is presented using inner SFC and outer proportional integral (PI) controller. The results obtained are compared with the conventional PI controller in both inner and outer loop to show the effectiveness of the proposed method. The simulation studies are carried out using MATLAB/ SIMULINK software tool. In addition, an experimental prototype model controlled by C2000 Piccolo TMS320F28027 MCU digital controller is set up to validate the simulation results. Results revealed that the proposed control scheme (inner SFC and outer PI control) based POESL DC-DC Luo converter offer constant output voltage for wide line and load variations and also achieve the servo operation effectively.