The Research Of Transmission And Control Of The Contractless Transfer Power System

Contactless Power Transfer technology (referred to as CPT), is a technology of transfer energy or power as the signal ,long-range or wireless ,refering to a specific frequency. It overcomes physical contact of the traditional electric energy transmission, sparks and other defects, so which has some advantages of safety, reliability, efficiency and flexibility, etc. In the underground mining, underwater and the special requirements of the mobile load, it has a good prospect, the recently and wide attention of related the researchers.This paper is base on the object of contactless power transfer system ,through theoretical analysis, the equivalent mutual inductance model, computer simulation and circuit experiment of methods to study the stability of power transmission of multi-load system. It's main contents are as follows:1. The brief overview of characteristics, development status and future development of CPT is introduced, the issues of the worth and major tasks in this article are raised;2. Based on the basic working principle of the CPT system, by the mutual inductance model, relations of original-second edge are explained, the the necessity and their own characteristics of main types of resonance compensation are discussed;3. The stability probloms of power flow of Multi-load CPT system is studied, the affect of the frequency deviation and power-flow block on the system stability is discussed , several typical power flow control mode is introduced, and the role and effectiveness of switch-based power flow controller for avoiding power block are analysised.4. A current-fed parallel power CPT system circuit is designed, which is based on the push-pull parallel resonant converter and use a switching power supply chip, the experimental results verify of the switch type controller used in power flow control.