Modeling and control of split capacitor type elementary additional series positive output super lift Luo converter

摘要

DC/DC traditional converter voltage gain is limited with the duty ratio of the converter. High duty ratio will have narrow turnoff time, thereby considerable conduction and switching loss occurs. The High voltage gain requirement of the converter is needed to meet the demands of the renewable energy system with low input voltage. Super lift Luo converter is a new topology of DC/DC converter with its output voltage increasing in geometric progression. Super lift technique armed by split capacitors increases the output voltage in higher geometric progression. This paper focuses on the modeling and control of split capacitor type elementary additional series positive output super lift Luo converter. A state space averaging model of the proposed converter is carried out in order to provide a good line and load regulation. A PI controller is designed to control the duty ratio of switching pulse of the converter to stabilize the output for variation in line and load side. Simulation of the proposed converter is performed in MATLAB/SIMULINK. A prototype of the converter along with the controller is developed using analog PWM IC to validate the simulation results.