Development of Wireless Power Transfer Technology by Sony
This announcement by Sony is by far the most fascinating news I have personally heard this month. We all heard of Wireless data communication system technology such as WiFi, but how about if you could eliminate all the power cables connected to various electronic devices that you have at home. Well, this is the beauty of the Sony’s new wireless power transfer technology. Earlier this month the company made an announcement on development of such system using magnetic resonance technology resulting in elimination of power cables connecting your electronic products such as television sets.
Through use of this technology Sony had managed to transfer up to 60 Watts of electrical energy over a distance of 50 cm at an efficiency of approximately 80%, and 60% with use of a rectifier. This new form of wireless electrical power transfer made possible by incorporating a form of contact-less energy transmission technology based on magnetic resonance. Through use of magnetic resonance, electromagnetic energy is only transferred to recipient devices that match the same resonance frequency as the energy source in order to maintain the energy transfer efficiency even during the misalignment. Furthermore, the new system does not cause any heat induction even when there are metal objects positioned between the transmitter and receiver. Sony at the same time has developed passive extender units which can be set to the same frequencies as the transmission and recipient devices resulting in extension of transfer distance from 50cm to 80cm without any drop in transfer efficiency.