WIRELESS POWER DELIVERY IN DYNAMIC ENVIRONMENTS
First Claim
1. An adaptive impedance matching wireless power transfer system comprising:
- a drive inductor configured to receive alternating current electric power from a power source at a fixed frequency;
a high quality factor (“
high-Q”
) transmitter coil inductively coupled to the drive inductor;
a high-Q receiver coil configured to be inductively coupled to the transmitter coil; and
a load inductor inductively coupled to the receiver coil;
a first matching network that is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil.
1 Assignment
0 Petitions
Accused Products
Abstract
An adaptive system for efficient and long-range wireless power delivery using magnetically coupled resonators responds to changes in a dynamic environment, and maintains high efficiency over a narrow or fixed frequency range. The system uses adaptive impedance matching to maintain high efficiency. The wireless power transfer system includes a drive inductor coupled to a high-Q transmitter coil, and a load inductor coupled to a high-Q receiver coil. The transmitter coil and receiver coil for a magnetically coupled resonator. A first matching network is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil.
171 Citations
26 Claims
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1. An adaptive impedance matching wireless power transfer system comprising:
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a drive inductor configured to receive alternating current electric power from a power source at a fixed frequency; a high quality factor (“
high-Q”
) transmitter coil inductively coupled to the drive inductor;a high-Q receiver coil configured to be inductively coupled to the transmitter coil; and a load inductor inductively coupled to the receiver coil; a first matching network that is (i) operably coupled to the drive inductor and configured to selectively adjust the impedance between the drive inductor and the transmitter coil, or (ii) is operably coupled to the load inductor and configured to selectively adjust the impedance between the load inductor and the receiver coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An adaptive impedance matching wireless power transfer system comprising:
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a transmit side comprising a drive inductor configured to receive alternating current electric power from a power source at a fixed frequency, and a high-Q transmitter coil inductively coupled to the drive inductor; a receive side comprising a high-Q receiver coil configured to be inductively coupled to the transmitter coil, and a load inductor inductively coupled to the receiver coil; and a first matching network comprising a plurality of capacitors interconnected to form a switchable bank of capacitors, and a microcontroller operably connected to the switchable bank of capacitors, wherein the microcontroller is configured and operable to receive a measured operating parameter of the adaptive impedance matching wireless transfer system and to use the measured parameter to selectively adjust the impedance between either (i) the drive inductor and the transmitter coil, or (ii) the load inductor and the receiver coil. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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Specification