Harmonic reduction apparatus for wireless power transfer systems
First Claim
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1. A system comprising:
- a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches;
a primary resonant tank coupled to the plurality of power switches, wherein the primary resonant tank comprises at least a resonant capacitor;
a transmitter coil coupled to the primary resonant tank, wherein;
the transmitter coil is configured to be magnetically coupled to a receiver coil; and
the transmitter coil and the receiver coil are configured such that wireless power is transferred from the transmitter coil to the receiver coil; and
a harmonic reduction apparatus coupled between the switch network and the transmitter coil, wherein the harmonic reduction apparatus comprises a magnetic element and a capacitive element connected in series and further diagonally connected between an input terminal of the primary resonant tank and an output terminal of the primary resonant tank, and wherein the harmonic reduction apparatus is configured to;
attenuate at least one undesired frequency component of a current in the transmitter coil.
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Abstract
A device comprises a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches, a transmitter resonant tank coupled to the plurality of power switches, wherein the transmitter resonant tank comprises a primary resonant capacitor, a transmitter coil coupled to the transmitter resonant tank and a harmonic reduction apparatus coupled between the switch network and the transmitter coil, wherein the harmonic reduction apparatus is configured to attenuate at least one undesired frequency component.
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Citations
20 Claims
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1. A system comprising:
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a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches; a primary resonant tank coupled to the plurality of power switches, wherein the primary resonant tank comprises at least a resonant capacitor; a transmitter coil coupled to the primary resonant tank, wherein; the transmitter coil is configured to be magnetically coupled to a receiver coil; and the transmitter coil and the receiver coil are configured such that wireless power is transferred from the transmitter coil to the receiver coil; and a harmonic reduction apparatus coupled between the switch network and the transmitter coil, wherein the harmonic reduction apparatus comprises a magnetic element and a capacitive element connected in series and further diagonally connected between an input terminal of the primary resonant tank and an output terminal of the primary resonant tank, and wherein the harmonic reduction apparatus is configured to; attenuate at least one undesired frequency component of a current in the transmitter coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A device comprising:
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a switch network coupled to a power source, wherein the switch network comprises a plurality of power switches; a transmitter resonant tank coupled to the plurality of power switches, wherein the transmitter resonant tank comprises a primary resonant capacitor; a transmitter coil coupled to the transmitter resonant tank; and a harmonic reduction apparatus coupled between the switch network and the transmitter coil, wherein the harmonic reduction apparatus comprises a first harmonic reduction circuit diagonally connected between an input terminal of the transmitter resonant tank and an output terminal of the transmitter resonant tank, and a second harmonic reduction circuit connected in series with primary resonant capacitor, and wherein the harmonic reduction apparatus is configured to attenuate at least one undesired frequency component of a current in the transmitter coil. - View Dependent Claims (17, 18)
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19. A device comprising:
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a switch network coupled to a power source through an input capacitor, wherein the switch network comprises a plurality of power switches; a transmitter resonant tank coupled to the plurality of power switches, wherein the transmitter resonant tank comprises a primary resonant capacitor; a transmitter coil coupled to the transmitter resonant tank for transferring power to a receiver coil; a harmonic reduction apparatus comprising a plurality of harmonic notch circuits and a plurality of harmonic trap circuits; and a soft start switch coupled between the power source and the input capacitor. - View Dependent Claims (20)
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Specification