Sony develops highly efficient wireless power transfer system

Wireless-power-transfer-sysytem_prototypeSony Corporation announced the development of a highly efficient wireless power transfer system that eliminates the use of power cables from electronic products such as television sets. Using this system, up to 60 Watts of electrical energy can be transferred over a distance of 50cm (at an efficiency of approximately 80%, approximately 60% including rectifier).

This new wireless power transfer system incorporates a form of contactless electrical energy transmission technology based on magnetic resonance. With magnetic resonance, electromagnetic energy is only transferred to recipient devices that share the identical resonant frequencies as the energy source, so energy transfer efficiency is maintained, even when misalignment occurs. Furthermore, even if there are metal objects located between the transmitter and receiver, no heat induction occurs.

Sony Wireless power transfer sysytem (prototype)

Sony has also drawn on its years of experience developing high radio frequency (RF) technologies for use in wireless communications and broadcast products to create a new rectifier that realizes both high speed and high efficiency. The new wireless power transfer system combines these technologies to realize transfer efficiency of 60%, even when a rectifier is included. Sony has also developed passive extender units that are set to the same frequencies as the transmission and recipient devices, enabling the transfer distance to be extended from 50cm to 80cm* without any degradation in transfer efficiency.

With the growth in networked products, the number of cables used to connect these products has also increased. While data cables are rapidly being replaced with wireless communication systems such as Wi-Fi, the demand for wireless power transfer systems is also continuing to grow. Sony will proceed with its efforts to develop further technologies that meet customer needs for the wireless transfer of power across a wide range of products, distances and energy levels.

Main Features

1. High speed rectifier realizing high transfer efficiency

Sony has drawn on its years of experience and expertise in RF technologies, and also incorporated optimal new components to develop a new rectifier that combines both high speed and high efficiency. This minimizes energy loss when transferring energy from the transmitter to the receiver, and enables products such as television sets and mobile PCs to be efficiently powered, wirelessly.

2. Transfer distance is able to be extended using passive extender units

Passive extender units placed between the transmitter and receiver units enable the transfer distance to be extended without any degradation in efficiency. Based on fundamental experiments conducted using the component devices only, transfer distance can be extended from 50cm to 80cm. Although relatively large transmitter and receiver units are generally required for transferring energy over long distances, passive extender units can be used to relay power between small-sized transmitter and receiver units.

Source: Sony

Related posts

Selfie Shave

Selfie Shave

Selfies are a popular and easy way of having fun and saving and sharing memories. Yet with time they tend to become a little boring. Don’t you want a way in which you can take your own selfie and then modify it in various ways? Now you can do that thanks to a free Android app called Selfie...

Samsung to change naming of smartphones

Samsung to change naming of smartphones

Samsung is one of the leaders on the smartphone market and regularly makes tons of money just there but this does not mean the company is problem free. We’ll list just two of them – the company has a really large number of smartphones with confusing names on the market and has just suffered a 74...

GeForce GTX 660 Ti specs leaked, beats expectations

AMD and NVIDIA are ready to enter a new round of competition this fall with NVIDIA releasing more budget-oriented models of its highly successful Kepler family. The first in the line will be the GeForce GTX 660 Ti, expected later this month. While the card has been kept a secret the folks at...

Leave a comment