Integrated control of bridge type inductive power transfer systems for light load efficiency improvement

摘要

In this paper an integrated control strategy for bridge type inductive power transfer (IPT) systems is proposed to improve light load efficiency. The proposed control method is composed of three modes: full-bridge mode, phase-shift mode, and half-bridge mode. Processes to classify the operation modes are analyzed in accordance with a wide range of coupling coefficient and output power. Laboratory experiments are performed with the proposed control, and it is verified that the efficiency at 400W is improvedimproved by up to 18.6%.