Abstract
This paper presents a bidirectional wireless power transfer system for mobile power applications. A novel 2-switch bidirectional wireless power transfer system with dual-side control is proposed for mobile power applications. Although only two switches are adopted, the energy can be transferred from the transmitter side to the receiver side and vice versa. The term bidirectional means that the power-flow is bidirectional and also that the transmitter is also a receiver and the receiver is also a transmitter. The output energy can be easily controlled by the duty ratios of the two switches. Thus, the proposed bidirectional power transfer system uses only one circuit to achieve bidirectional power transfer. Hence, the system cost and volume can be reduced so that the system is small and convenient for mobile power systems, portable and/or wearable electronic devices. A prototype system is constructed and the experimental results verify the validity of the proposed bidirectional wireless power transfer system.
Highlights
Wireless power transfer systems have been studied by many researchers due to the system merits (WPT) such as cordless, wireless charging and safety in power transfer [1,2,3,4,5,6]
A prototype system is constructed and the experimental results verify the validity of the proposed bidirectional wireless power transfer system
This paper proposed a novel wireless bidirectional power transfer system
Summary
Wireless power transfer systems have been studied by many researchers due to the system merits (WPT) such as cordless, wireless charging and safety in power transfer [1,2,3,4,5,6]. Wireless power transfer has been applied to many applications including high power applications such as electric vehicle (EV). There are critical issues to be overcome in the practical design of wireless power transfer systems. One of the issues is the position and shape of the magnetic coupler. The most commonly used magnetic coupler structures in wireless charging are the circular and rectangular types. The larger the current loop area is, the larger the magnetic dipole moment. Some literatures [7,8] discussed the shape of the inductive coupler and coupler array to generate better magnetic dipole moment to induce the desired energy
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