Inductive charger and charging method

摘要

A charger for inductively charging one or more battery powered appliances simultaneously includes an external unit configured to inductively provide power to the battery powered appliances. The external unit includes two or more primary coil pairs that are arranged in a circular pattern; an AC power source for providing an alternating current (AC) to the primary coil pairs for generating a rotating magnetic field between respective primary coils of the primary coil pairs; and a processor for driving the AC power source. The one or more battery powered appliances are configured to be arranged inside the circular pattern of the external unit. Further, each appliance includes a secondary coil for enclosing part of the magnetic field and, in response, generating a current for charging the battery of the appliance.

主权项

1. A charger apparatus comprising:
one or more appliances, each appliance being powered by a battery and comprising a secondary coil for generating a current for charging the battery; and a charger comprising a plurality of primary coil pairs arranged in a circular pattern with coils of each pair positioned opposite each other, each primary coil pair including one or more switches for short circuiting the respective primary coil pair, the circular pattern enclosing the secondary coils of the one or more appliances placed in the charger; wherein, when an alternating voltage is provided to the plurality of primary coil pairs, a rotating magnetic field between respective primary coil pairs of the plurality of primary coil pairs is generated thereby inducing current in the secondary coils.