Noise mitigation in wireless power systems
First Claim
Patent Images
1. A wireless power system comprising:
- a transmitter comprising;
a substrate;
at least one transmitter coil on the substrate formed with at least one crossover per turn, the at least one transmitter coil comprising;
a first portion;
a second portion; and
an in-line filter capacitor coupled between the first portion and the second portion, wherein at least one crossover is formed by the in-line filter capacitor; and
a receiver magnetically coupled to the at least one transmitter coil and comprising a receiver coil formed with at least one crossover per turn.
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Abstract
A wireless power system includes an electrically-balanced inductor in a transmitter device and an electrically-balanced inductor in a receiver device. The electrically-balanced inductors can be formed by introducing crossovers between radially-adjacent portions of two separate turns of each inductor. The crossovers balance the electric field generated by the transmitter device when transferring power to the receiver device.
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Citations
17 Claims
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1. A wireless power system comprising:
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a transmitter comprising; a substrate; at least one transmitter coil on the substrate formed with at least one crossover per turn, the at least one transmitter coil comprising; a first portion; a second portion; and an in-line filter capacitor coupled between the first portion and the second portion, wherein at least one crossover is formed by the in-line filter capacitor; and a receiver magnetically coupled to the at least one transmitter coil and comprising a receiver coil formed with at least one crossover per turn. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of forming an inductor array for a wireless power system, the method comprising:
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selecting a turn layer comprising a number of turn trace pairs, each turn trace pair comprising; a first turn trace; and a second turn trace; positioning a crossover layer on the turn layer, the crossover layer comprising a number of crossover traces, each crossover trace positioned over a respective one first turn trace and over a respective one second turn trace; and electrically connecting the crossover layer to the turn layer to define at least one inductor the at least one inductor comprising at least one crossover per turn;
wherein at least one crossover is formed by an in-line capacitor. - View Dependent Claims (11, 12, 13, 14)
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15. A method of forming an inductor for a wireless power system, the method comprising:
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forming a turn layer comprising; a first turn trace; a second turn trace adjacent to the first turn trace; a third turn trace opposite the first turn trace; a fourth turn trace adjacent to the third turn trace and opposite the third turn trace; forming a first crossover by electrically connecting an in-line capacitor between the first turn trace and the fourth turn trace; depositing an insulating material over the crossover; and forming a second crossover electrically connecting the second turn trace and the third turn trace. - View Dependent Claims (16, 17)
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Specification