Study On Pick-up Technology Of Contactless Power Transfer System

Contactless Power Transfer (CPT) Technology provides a new way for contactless power transmission. In recent years, applications of the CPT technology made many successful cases, demonstrate its broad application prospects. And the CPT technology-related theory, analysis, design and control problem attracted much attention, access to some of the practical application of valuable results.In this paper, key to the fund project of Science & Technology department of Chongqing and the National Natural Science Fund projects for the background, mainly focuses on CPT system's pick-up frequency compensation and output voltage stability control. Papers first introduced the CPT technology of the status quo at home and abroad, the research purpose and meaning, structure and principle, and presented for the CPT systems in a variety of application areas and pick-up electromagnetic coupling circuit structure.Then this paper on the CPT system pick-up the frequency compensation circuit technology was studied. Against the CPT systems pick-up the inductor reactive power consumption, a vice-capacitor resonant circuit access to pick-up the ways to improve power factor circuits. Address system in the course of their work load and interference caused by changes in the resonant circuit pick-up part of the inherent resonant frequency deviation system frequency, leading to pick-up additional reactive power circuit efficiency of the system, this paper dynamic frequency compensation model approach to resonant circuit link to the inherent resonant frequency of the system and always maintain the same frequency to ensure that the transmission efficiency of the system.Finally, the CPT system output voltage stability control technology was studied. Against output voltage of the CPT system and the load impedance changes in the system frequency of the question, at the same time taking into account the complexity of the problem, this paper used in the pick-up side to join DC output voltage adjustment link method. The programs stability control of the output voltage and power transmission principle was analyzed, and the output regulator control circuit design.Papers establishment of the system model, using PSpice associated with Simulink simulation analysis be a better design. According to the final results of the study related to the CPT system and pick-up the output voltage regulator control circuit design, and conducted an experiment to test the theoretical calculations and simulation results. The experimental results show that the control system can achieve good output voltage stability.