Wireless Power Transfer to Low Power Devices

A WPT system usually consist of a transmitter connected to main power source which produces a varying magnetic field, generating flux, due to which current is induced in the receiver coil. Here the receiver coil used has parameters depending on the application. Since Tesla’s work on wireless power technology, not a significant lot has been done. Wireless power transfer is used in different applications ranging from mobile chargers to charging stations. The major challenge faced by wireless power is efficiency, and it decreases drastically if the range is increased even by a fraction. In this paper a WPT charger is modeled and simulation has been conducted over Maxwell 3d of Ansys electromagnetic suite. On basis of simulation results obtained a hardware model is designed and is tested by increasing the distance between the coils and seen the better improvements in terms of efficiency. This model can be a turning point for our society. The device is easily established like in railway stations and metro cities and is affordable. This proposed design is helpful for contact less mobile charging for public places in India. This is a low budget system with an essential social application.