The concept works a bit like this. When electricity travels through a wire, a magnetic field is generated. That field can be amplified by arranging the wires into a coil. The more loops in the coil, the more powerful the field. That field can be used to power electric systems in the vicinity, without using any cables.
Inductive power transfer has however its limitations. Because of the field's tendency to disperse, it is largely ineffective to place the object you need to recharge at a bigger than reasonable distance.
The system consists of a Plugless Power vehicle adapter, created to the specs of each electric or plug-in hybrid vehicle model and a fixed Plugless Power station to which the adapter connects and charges the batteries.
Plugless Power is in fact a transformer split in half, with one half located in the power station and one on the vehicle. When the two halves are being brought together, the magnetic field generated by the power station expands to encompass the vehicle's half of the transformer and the batteries begin charging.
To charge the vehicle, all a driver needs to do is pull close to a Plugless Power station. Very close, 2 inches (5
According to the manufacturer, the time needed to recharge the batteries of an EV will be similar to the one required when using a conventional system. Despite the small distance between the car and station, the manufacturer expects a 10 percent efficiency loss, one which, it claims, will not affect however the charging time.
ADVANTAGESHaving no power cord, Plugless Power makes recharging an EV a type of park-and-forget deal. Users will no longer have to go to the car or charging station to pull the cord and they will no longer have to plug the vehicle in.
The system has been developed by Evatran to fit each and any electric vehicle, so that it meets the factory required specs and does not require modifications to be brought to the vehicle's design or electric system.
DISADVANTAGESThe system still requires some modifications to be brought to the vehicle, because the vehicle adapter will have to be installed. Although it will probably be approved by the EV manufacturers, being provided as an aftermarket gizmo may cause unrest to some owners.
Also because it is an aftermarket gizmo, the system costs extra. Evatran will charge $800 for the adapter to be fitted onto the vehicle. Not a big price, but still $800 more than when using a regular power cord.