Renewable energy

Optoelectronics

Metamaterial

Engineering

Power (physics)

Wireless power transfer

Maximum power transfer theorem

Telecommunications

Energy transfer

Physics

Power transmission

Wireless

Systems engineering

Quantum mechanics

Computer science

Battery (electricity)

Electrical engineering

Engineering physics

Transmission (telecommunications)

IEEE Transactions on Industrial Electronics

Due to limitations of low power density, high cost, heavy weight, etc., the development and application of battery-powered devices are facing with unprecedented technical challenges. As a novel pattern of energization, the wireless power transfer (WPT) offers a band new way to the energy acquisition for electric-driven devices, thus alleviating the over-dependence on the battery. This paper presents an overview of WPT techniques with emphasis on working mechanisms, technical challenges, metamaterials, and classical applications. Focusing on WPT systems, this paper elaborates on current major research topics and discusses about future development trends. This novel energy transmission mechanism shows significant meanings on the pervasive application of renewable energies in our daily life.

Wireless Power Transfer—An Overview