The Simulation Study of New Boost-ZVT Circuit Based on Pspice

摘要

Because the shortcoming of the traditional Boost-ZVT has large shutdown losses for the auxiliary switch on hard-working, the circuit has disadvantage of low efficiency. The paper discusses a new Boost-ZVT circuit, and the new circuit designs the absorption circuit in the auxiliary switch circuit to achieve soft turn-off. Compared to ordinary Boost-ZVT circuit, all the switches work in a state of soft-switching for an improved Boost-ZVT circuit. So the new Boost-ZVT circuit can improve the efficiency of the system, at the same time it can eliminate the interference because of switch temperature rising, and can ensure the reliability of the whole system. Finally, the paper builds circuit model and make simulation based on PSPICE, and the simulation results show that the theoretical analysis is correct.