Voltage-mode controller design for soft-switching high gain boost converter

In this paper digital voltage-mode controller design for a zero-voltage turn-on high gain boost converter is presented. Firstly, the converter steady-state performance is analyzed by using circuit theory principles. This analysis shown that this converter circuit exhibits five different modes of operations in one switching cycle and also results in zero-voltage transition to the switching devices. Control-to-output z-domain transfer function is formulated, using system identification toolbox of the MATALB, and then used in the direct digital controller design. A pole-zero placement technique is adopted to arrive at final digital voltage-mode controller. Closed-loop converter performance is predetermined, for a 24 to 100 V 100 Watt prototype both in matlab and PSIM software, and then compared with experimental measurements. Experimental measurements are in close agreement with simulations.