| This paper introduces a novel technique of synchronous generator brushless excitation based on rotating converter. This new power transmission technique is called Rotary Inductive Power Transfer technique. It can supply a constant and adjustable exciting current to synchronous generator by transferring electric power from a static part of the converter to the rotating part without a real connection. The key component of the converter is the rotating transformer which connects the static part and the rotating part. The primary part of this transformer is static while the secondary part is integrated with the rotor which can rotate with the shaft.This paper gives a detail description of the three parts of this brushless exciting system based on rotating converter. Firstly, it introduces the principle and working characteristics of the full-bridge rotating converter as well as its designation, then establishes its simulation model and does a comparison of the results between simulation and experiments. Secondly, it does some research of the synchronous generator used for brushless experiments. The research includes modeling based on finite element, analysis of the magnetic filed and simulation of inductance parameters. At last, it introduces the components and designation of the excitation regulator. In addition, it establishes the simulation model for the whole brushless system, and does the brushless excitation experiments using rotating converter on the experimental platform. The experiment results illustrate that the rotating converter can meet the requirements of the synchronous generator excitation system. So the technique of rotating converter is not only a break through on brushless excitation of synchronous motor, but a new direction for the research of this field. |
