Research Of Power Supply For10kV ECT Based On Wireless Power Transfer

Electronic current transformer (ECT) which gradually replaces the traditionalcurrent transformer is widely applied and researched. It is an important research taskand technical challenge to safely and economically provide power for the high voltageside of ECT. In order to solve the above problem, this paper researched and designed aminiaturized power transfer system based on requirements of high voltage side of ECTby using the magnetic coupling resonant wireless energy transfer technology.This paper analyzed the basic theory about the magnetic coupling resonantwireless power transfer technology, built a typical equivalent circuit model to analyzethe key factors affecting the power transfer. We provided the hypotheses ofmulti-resonant body transfer and studied the transfer characteristics of the threeresonant body.This paper designed the hardware circuits of transmitter and receiver according tothe requirements of the power. We improved the way of taking power from receiverthrough optimizing the coil parameters for reducing the system size, the resonant bodyspace is60mm*60mm*100mm at last.This paper built an experimental platform for magnetic coupling resonant wirelesspower transfer system. By the experiment and simulation, we studied the transfercharacteristics of changing the coil parameters, the resonant frequency and the load,analyzed the feasibility of the system optimization. By debugging the whole powertransfer system, the experiment results shows that this system could ensure at least10Wtransfer power in the DC15V and transfer efficiency of60%within the range of70mm.