Optimized Design of Mutual Inductance Parameter in Separable Magnetic Pot Transformer used for Noncontact Energy Coupling System

摘要

Energy coupling realized by separable magnetic pot transformer as new approach of rotor excitation in synchronous machine could replace brushes and slip rings of traditional excitation. For new noncontact energy coupling (NEC) system, its research about energy and efficiency quality still remains a low level because application and research of NEC aren’t comprehensive, especially how to improve transmission power and efficiency is still not enough. In this paper, series & series resonance compensation circuit was designed, and this compensation circuit would make the circuit have high transmission efficiency. Then, optimum mutual inductance was proposed. We can consider efficiency, system cost, reliability and so on based on maximum output power in order to get optimum mutual inductance. Mutual inductance coupling parameter would be optimized by adjusting structure of separable transformer and realizing optimum design of system efficiency characteristic at minimum cost. Although the output power had little increase, Ansoft 3D simulation research proved that system has high electromagnetic coupling characteristic based on optimum mutual inductance. The results of experiment also proved that efficiency of system had a quite handsome increase and verified the validity of theory analysis.