Near field, full duplex data link for use in static and dynamic resonant induction wireless charging
First Claim
1. A full duplex data communication system employing near field inductive transmission, comprising:
- a first transmit/receive system that transmits a first signal over a first inductive link and receives a second signal over a second inductive link; and
a second transmit/receive system that receives the first signal over the first inductive link and transmits the second signal over the second inductive link,wherein said second signals are derived from said first signals and said first and second signals are frequency coherent.
2 Assignments
0 Petitions
Accused Products
Abstract
A full duplex, low latency, near field data link controls a static and/or dynamic resonant induction, wireless power transfer system used for recharging electric vehicles and other electrically powered devices. A coherent transponder configuration enables low complexity synchronous detection and positive rejection of signals originating from nearby and adjacent vehicles. A reference crystal oscillator in the ground side apparatus provides frequency synchronization for both the forward and the return data links. Transmission is by means of near field magnetic induction between pairs of loop antennas which, together with the effective waveguide below cutoff structure comprised by the vehicle underbody and the ground surface, largely restrict signal propagation to the area in the immediate vicinity of the system antennas.
21 Citations
47 Claims
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1. A full duplex data communication system employing near field inductive transmission, comprising:
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a first transmit/receive system that transmits a first signal over a first inductive link and receives a second signal over a second inductive link; and a second transmit/receive system that receives the first signal over the first inductive link and transmits the second signal over the second inductive link, wherein said second signals are derived from said first signals and said first and second signals are frequency coherent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of providing full duplex data communication employing near field inductive transmission between a first transmit/receive system and a second transmit/receive system, comprising the steps of:
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the first transmit/receive system transmitting a first signal over a first inductive link; the second transmit/receive system receiving the first signal over the first inductive link; the second transmit/receive system transmitting a second signal over a second inductive link; and the first transmit/receive system receiving the second signal over the second inductive link, wherein said second signals are derived from said first signals and said first and second signals are frequency coherent. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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42. A method of wireless charging a vehicle using a wireless inductive power transfer system, comprising:
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establishing a full duplex communication link between said vehicle and a charging transmitter, said full duplex communication link employing near field inductive transmission between a first transmit/receive system at said charging transmitter and a second transmit/receive system on said vehicle, comprising the steps of; the first transmit/receive system transmitting a first signal over a first inductive link, the second transmit/receive system receiving the first signal over the first inductive link, the second transmit/receive system transmitting a second signal over a second inductive link, and the first transmit/receive system receiving the second signal over the second inductive link, wherein said second signals are derived from said first signals and said first and second signals are frequency coherent; and controlling wireless power transfer between said charging transmitter and said vehicle by sending control signals over said full-duplex communication link. - View Dependent Claims (43, 44, 45, 46, 47)
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Specification