Loosely coupled wireless power transfer for multilevel system design

Inductively Coupled Power Transfer (ICPT) systems are designed to deliver power efficiently from a stationary primary source to movable secondary loads over air gaps via magnetic coupling. Present vehicle chargers are wired. Corrosion of connectors is a very serious problem. Frequent replacement and maintenance are needed for proper operation. For charging different vehicles with different battery voltages we have to modify the charger to suit the battery voltages that will affect the charger efficiency. This work proposes a design for practical electric vehicle charger suitable for any power vehicles (two wheelers, four wheelers, heavy motor). LCPT vehicle chargers are wireless and there is no contact problems and maintenance so it is a maintenance free charger. LCPT can charge different vehicles with different battery voltages without making any changes in the charger so the efficiency does not affect. Only the number of turns of the pickup coil (secondary coil) has to be adjusted at the time of manufacturing of the vehicles. This same concept can be used in traction system by neglecting the battery.