Abstract
A new type of in-wheel motor, which receives electric power by wireless power transfer using magnetic resonant coupling and control signals by wireless communication, thus eliminating completely the need for power and signal cables, has been developed. This system is called the Wireless In-wheel Motor (W-IWM). The overall efficiency of the W-IWM system has been considerably improved. In particular, burst fire control was applied to the previous generation W-IWM to keep the DC-link voltage stable in wheel side. This control made use of asynchronous rectification, resulting in glitches in the controlled variables when the system commutates between motoring and regeneration, due to wireless signal delay. To achieve more efficient control and smooth energy reversal, this paper proposes a novel control method for W-IWM driving that employs an application of synchronous rectification. The experimental results of the test bench confirm the effectiveness of the proposed method.