Design of a Hybrid Posicast Control for a DC-DC Boost Converter operated in Continuous Conduction mode

This paper presents the design of a Hybrid Posicast Controller (HPC) for a DC-DC Boost Converter (BC) operated in Continuous Conduction Mode (CCM). A HPC is a feed-forward compensator, which eliminates the peak overshoot in the step response of lightly damped systems. However, the conventional control technique is very sensitive to variations in natural frequency of oscillation in the system. In order to reduce this undesirable sensitivity of system, HPC is proposed, which is operated within the feedback loop of the system. The design of the Posicast function is independent of computational delay. The proposed controller produces a lower noise in the control signal, when compared to a conventional Proportional-Integral-Derivative (PID) controller. The simulation of DC-DC BC with its both control methods are implemented in MatLab/Simulink. The controller parameters are optimized by tuning design procedure method. The performances evaluation of DC-DC BC with both control methods is tested at controller parameters variations, steady state region, line and load variations. The simulation results are presented to validate the effectiveness of a proposed controller.