Experimental verification and implementation of a isolated ZVT boost converter for high step-up electric traction

Lofty power and elevated step-up isolated dc-dc converters have been widely employed in the emerald power systems and especially for electric traction drives. In electronics engineering, a DC to DC converter is a circuit, which converts a source of direct current from one voltage to another. It is a class of power converter. In many DC-DC applications, output isolation may need to be implemented depending on the type of application to meet safety standards to provide impedance matching. This galvanic isolation is required to attain a flexible system reconfiguration. Active lamp boost converter with coupled-inductors is proposed for high step-up electric traction applications. The primary-parallel-secondary-series structure is employed in this project to knob the huge input current, maintain the high output voltage and enlarge the voltage gain. Purpose of the coupled-inductors is to reduce the voltage gain addition and lesser concern in switching. Clamp circuit is used to re circulate the energy. The voltage strain in rectifier is minimized and reverse-recovery problem is eliminated. The hardware unit utilizes embedded technology using PIC microcontroller 16F84A to give gate pulses to the MOSFET converter switches. In this proposed converter only three MOSFET´s are used which reduces the number of devices and makes circuit simple in construction. Efficiency, size, and cost are the primary advantages of the proposed isolated ZVT boost converter when compared to other existing converters. Isolated ZVT boost converter employing series-parallel arrangement will have an efficiency of about 88-94%, whereas existing converters are usually 80 to 85% efficient. In the present work, a novel ZVT boost converter for electric traction drive application is developed has been designed in MATLAB/SIMULINK software packages. The simulation result for a 40-V-to-600-V converter is simulated in open circuit and closed loop system. Simulated disturbance is applied at a time period of 0.- micro second and noted that the output voltage is maintained constant always. The hardware unit and experimental results of a 15V to 85-V ZVT converter is implemented and the results are verified.