Design of IMC & IMC Derived PID Controller for Interleaved Boost Converter

Abstract

This paper gives the design of IMC and IMC derived biphasic Interleaved Boost Converter (IBC) in voltage mode control technique. Small-signal based modelling of IBC in continuous conduction mode (CCM) of operation shows a right half plane zero (RHPZ) in control to output plant transfer function (TF) of the IBC. IBC produces substantially low output voltage ripple compared to boost converter due to the emergence of multiple power switches in the parallel path. Subsequently, the size and output filter losses of IBC can be substantially reduced in comparison to the Boost Converter (BC). Execution of the converter-controller system is validated by SISO tool-based step response analysis. Developed IMC and IMC dependent PID controllers are performing better than highly cited Type III controller-based IBC in line, load regulation, and reference tracking study. They have comparable performance in parametric uncertainty (variation) study, validated using MATLAB/SIMULINK. IMC derived PID is performing better than the IMC controller in line regulation, load regulation, and parametric variations, but in step response checking, they have nearly equal settling time.