The Research Of Series Resonance Converter Based On Fuzzy Control And Soft Switch

This paper presents a contactless electrical power deliver system in the first place. Both the high frequency coaxial winding transformer applied to the load of series resonance converter and the high frequency full-bridge series resonance converter are the keys of the contactless electrical power deliver technology. Based on the special load of the contactless system, this paper analyses and contrasts the principle and feature of the series and parallel resonance circuit. Design the high frequency full-bridge series resonance converter and make the main circuit apply to the contactless electrical power deliver system and analyses the process of the main circuit in detail.In the next place, by studying the change of the resonant frequency of the whole system, this paper designs the circuit to track the resonant frequency of the system by CD4046 mainly. At the same time, in order to improve the efficiency and get better dynamic capability of the converter, we choose PLL and fuzzy control after comparing the PLL circuit , fuzzy circuit and PLL?fuzzy control circuit.In the end, this paper brings forward the control blue print to realize the drive control circuit of the high frequency converter, using the DSP chip as the key part to realize four routes of PWM drive pulses with dead band of the control system. At the same time, the protection circuit with locking each other and the driving circuit to IGBT improve the reliability of the system. As a result, from the outcome of simulation and experiment of the converter system, it's proved that this design project of converter is viable.