WiTricity FAQ

Q: Is WiTricity technology safe?

A: WiTricity’s technology is a non-radiative mode of energy transfer, relying instead on the magnetic near field. Magnetic fields interact very weakly with biological organisms—people and animals—and are scientifically regarded to be safe. WiTricity products are being designed to comply with applicable safety standards and regulations.

Q: How much power can be transferred?

A: Our technology is capable of scaling from applications requiring milliwatts to those requiring several kilowatts of power.

Q: Over what distance can WiTricity technology transfer power?

A: WiTricity technology is designed for “mid-range” distances, which we consider to be anywhere from a centimeter to several meters. The actual operating range for a given application is determined by many factors, including power source and capture device sizes, desired efficiency, and the amount of power to be transferred.

Q: How efficient is WiTricity technology?

A: The power transfer efficiency of a WiTricity solution depends on the relative sizes of the power source and capture devices, and on the distance between the devices. Maximum efficiency is achieved when the devices are relatively close to one another, and can exceed 95%.

Q: Does the efficiency depend on the coil shape or material?

A: Efficiency is primarily determined by the distance between the power source and capture device, however, the shape may impact the efficiency. WiTricity uses validated models to predict the effects of distance, shape, and materials on the performance of a given system configuration.

Q: Can WiTricity technology transfer power through walls or obstructions?

A: Most common building and furnishing materials, such as wood, gypsum wall board, plastics, textiles, glass, brick, and concrete are essentially “transparent” to magnetic fields—enabling WiTricity technology to efficiently transfer power through them. In addition, the magnetic near field has the ability to “wrap around” many metallic obstacles that might otherwise block the magnetic fields, and still transfer power

Q: How well does WiTricity technology work in the presence of metal walls?

A: A metal wall that is much larger than, and between, the power source and capture device can act as a barrier and prevent power transfer.

Q: How does WiTricity technology compare to traditional magnetic induction, like that used in a charging mat or electric toothbrush?

A: Traditional magnetic induction requires that the power source and capture device be very close to one another—usually within millimeters—to transfer power efficiently. That’s why many traditional inductive charging solutions require a cradle to hold the capture device, or a mat on which the capture device must rest. WiTricity technology is based on sharply resonant strong coupling, and is able to transfer power efficiently even when the distances between the power source and capture device are several times the size of the devices themselves.

Q: Where and when can I buy WiTricity products?

A: WiTricity technology is designed for Original Equipment Manufacturers (OEM’s) to embed directly in their products and systems. If your company is an OEM, please contact us to discuss your application in more detail. If you are a consumer that is eager to purchase products that are WiTricity enabled, please check back again at our website to learn about products that you can purchase with WiTricity inside.