ETRI, Wireless Charging in 3D Space
Published2017.05.25 17:51Maintain charging efficiency by utilizing a uniform magnetic field
Current wireless charging methods rely on a two-dimensional pad. Charging requires placing the smartphone on the pad, making it inconvenient.
The Electronics and Telecommunications Research Institute (ETRI) announced that it has successfully developed a '3D space wireless charging (E-Cup)' technology that maintains a constant charging efficiency regardless of the orientation of the smartphone within a space of approximately 10 cm in diameter.
This technology was made possible by developing a uniform field generation technology that can maintain a uniform distribution of the magnetic field in a specific space to overcome the shortcomings of wireless charging technology with a two-dimensional pad structure.
It also applies phase control technology, allowing multiple devices to be charged simultaneously within a 10cm diameter cup space, and maintaining consistent power charging efficiency regardless of the orientation.
The research team explained, "It has the same power charging speed as wired charging, and the power charging efficiency is approximately 60% of that of wired charging." They added, "We estimate the commercialization level to be 70%. To commercialize it, we need additional technology to embed core technologies into the chip."
ETRI's Ho-jin Lee, head of the Radio and Satellite Research Division, said, "This developed technology is in the early research stage, but considering the fields of application, it is a technology with a very large ripple effect. “We see it as a foundational technology that can create various services and new markets utilizing radio waves, such as the future Internet of Things (IoT), eco-friendly cars, and drones,” he said.
Going forward, ETRI will continue its research and development efforts to focus on room structures (5m x 5m) for general living spaces, such as living rooms. ETRI plans to secure technologies for more efficient and novel energy transmission methods, higher efficiency and miniaturization of transmission systems, and improved human and device safety in living spaces, and accelerate their commercialization and standardization.
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