Wireless power transmission system and associated devices
First Claim
1. A wireless power transmission system comprising:
- a power transmitter comprising;
a power amplifier that converts a DC level power supply into a sinusoidal waveform at a selected frequency in the range of about 20 to 500 kHz;
a first planar loop antenna; and
a tuning capacitor that couples said power amplifier with said antenna;
a power receiver comprising;
a second planar loop antenna; and
a receiver tuning capacitor; and
,at least one electricity-consuming device connected to the output of said power receiver.
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Accused Products
Abstract
A wireless power transmission system comprises: a power transmitter, which includes a power amplifier that provides a sinusoidal waveform in the frequency range of about 20 to 500 kHz; a first loop antenna producing an alternating magnetic field within a selected area; a power receiver, which includes a second loop antenna located at least partially within the alternating magnetic field of the first antenna; and an electricity-consuming device connected to the output of the power receiver. Both transmitter and receiver preferably contain a capacitive circuit element to optimize tuning, which may be discrete capacitors or may rely on the self capacitance of the antenna(s). Applications of the system include: wirelessly powered lights for fans, boats, aquariums, display cases, etc.; wirelessly powered sensors and other devices for use with captive animals; and systems for transmitting useful power through construction materials to devices on the other side of walls or other structures.
259 Citations
22 Claims
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1. A wireless power transmission system comprising:
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a power transmitter comprising; a power amplifier that converts a DC level power supply into a sinusoidal waveform at a selected frequency in the range of about 20 to 500 kHz; a first planar loop antenna; and a tuning capacitor that couples said power amplifier with said antenna; a power receiver comprising; a second planar loop antenna; and a receiver tuning capacitor; and
,at least one electricity-consuming device connected to the output of said power receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless power system for watercraft comprising:
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a power transmitter comprising a power amplifier that converts a DC level power supply into a sinusoidal waveform at a selected frequency in the range of about 20 to 500 kHz; and
a first planar loop antenna disposed adjacent to an inner surface of the hull in a selected area of said watercraft, said first antenna producing an inductive magnetic field within said selected area;a power receiver located on an outer surface of said hull, said receiver comprising a second planar loop antenna adjacent to said selected area of said watercraft and a receiver tuning capacitor; and
,at least one electricity-consuming device connected to the output of said power receiver. - View Dependent Claims (11, 12, 13, 14)
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15. A containment system for animals comprising:
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an enclosure for containing an animal in a captive state; a power transmitter comprising a power amplifier that converts a DC level power supply into a sinusoidal waveform in the frequency range of 20 to 500 kHz;
a first planar loop antenna; and
a tuning capacitor that couples said power amplifier with said first antenna, said first planar loop antenna disposed adjacent to a surface of said enclosure and producing an inductive magnetic field within said enclosure;a power receiver located within said enclosure, said receiver comprising a second antenna and a receiver tuning capacitor; and
,at least one electricity-consuming device connected to the output of said power receiver. - View Dependent Claims (16, 17, 18)
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19. A wireless lighting system comprising:
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at least one horizontal surface upon which selected objects may be displayed; at least one movable stand for holding one or more of said selected objects; a power transmitter comprising a power amplifier that converts a DC level power supply into a sinusoidal waveform at a selected frequency in the range of about 20 to 500 kHz; and
a first planar loop antenna disposed parallel to said horizontal surface, said first antenna producing an inductive magnetic field over at least part of said horizontal surface, and a tuning capacitor that couples said power amplifier to said first antenna;a power receiver located on said movable stand, said receiver comprising a second planar loop antenna oriented parallel to said first loop antenna, a receiver tuning capacitor, and at least one lighting device connected to the output of said power receiver. - View Dependent Claims (20, 21)
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22. A lighted ceiling fixture comprising:
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an electric motor-driven ceiling fan having a plurality of fan blades; a power transmitter comprising a power amplifier that converts a DC level power supply into a sinusoidal waveform at a selected frequency in the range of about 20 to 500 kHz; and
a first planar loop antenna disposed generally parallel to the plane of rotation of said fan blades, said first antenna producing an inductive magnetic field at least intermittently over at least part of the surfaces of said fan blades, and a tuning capacitor that couples said power amplifier to said first antenna;a power receiver located on at least one of said fan blades, said receiver comprising a second planar loop antenna oriented generally parallel to said first loop antenna, a receiver tuning capacitor, and at least one lighting device on said fan blade connected to the output of said power receiver.
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Specification