ROAD CHARGING FOR ELECTRIC VEHICLE IN MOTION
A loop antenna in an electric vehicle receives energy wirelessly from a source external to the vehicle, such as from a series of Radio Frequency (RF) emitters embedded in a road surface. The use of single turn, RF loop antennas to both transmit and receive power greatly reduces the need to align the vehicle with the charging equipment.
1 . A method for charging an electric vehicle as it travels along a road surface comprising:
a single turn, receive loop antenna, disposed within the vehicle;
a series of single turn, transmit loop antennas, arranged beneath the road surface, and to coupled to an energy source to transmit energy via a radio signal; and
with a diameter of the receive loop antenna at least three times a diameter of the transmit loop antennas.
2 . The method of claim 1 additionally comprising:
digitally modulating the radio signal.
3 . The method of claim 1 additionally comprising:
determining a relative position of the vehicle from the radio signal.
4 . The method of claim 1 additionally comprising:
detecting a position of the vehicle; and
selectively coupling the energy source to the transmit antenna depending uping the detected position.