Systems, apparatus, and methods for wireless power receiver coil configuration
First Claim
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1. An apparatus for wirelessly receiving power, the apparatus comprising:
- a coil circuit configured to generate a current in response to a magnetic field generated by a transmitter, the coil circuit comprising a conductive material having at least three loop portions, including a first loop portion, a second loop portion enclosing a first area, and a third loop portion enclosing a second area that is non-overlapping with the first area, the second and third loop portions fully enclosed by the first loop portion, the first loop portion, the second loop portion, and the third loop portion physically connected to create a single winding of the conductive material, the second loop portion and the third loop portion having a third area therebetween, the second loop portion having a first portion adjacent to a first portion of the first loop portion, and the third loop portion having a first portion adjacent to a second portion of the first loop portion and a second portion adjacent to a second portion of the second loop portion, wherein the generated current flows through the first portion of the first loop portion and the first portion of the second loop portion in a first direction and flows through the second portion of the first loop portion and the first portion of the third loop portion in a second direction, and wherein the generated current flows through the second portion of the second loop portion and the second portion of the third loop portion in opposite directions to create a field cancelling effect in the third area; and
a receive circuit including a rectifier circuit, the receive circuit being electrically and conductively coupled to the first loop portion, wherein the receive circuit is configured to generate an output for at least one of powering or charging a load based at least in part on the generated current.
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Abstract
Systems, methods and apparatus are disclosed for wirelessly receiving power. In one aspect, a coil is configured generate a voltage in response to magnetic field generated by a transmitter. The coil comprises a conductive material wound into at least three non-overlapping loop portions. The coil further includes a first loop portion, a second loop portion, and a third loop portion. The second and third loop portions at least partially enclosed by the first loop portion, the second and third loop portions non-circumscribing each other.
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Citations
29 Claims
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1. An apparatus for wirelessly receiving power, the apparatus comprising:
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a coil circuit configured to generate a current in response to a magnetic field generated by a transmitter, the coil circuit comprising a conductive material having at least three loop portions, including a first loop portion, a second loop portion enclosing a first area, and a third loop portion enclosing a second area that is non-overlapping with the first area, the second and third loop portions fully enclosed by the first loop portion, the first loop portion, the second loop portion, and the third loop portion physically connected to create a single winding of the conductive material, the second loop portion and the third loop portion having a third area therebetween, the second loop portion having a first portion adjacent to a first portion of the first loop portion, and the third loop portion having a first portion adjacent to a second portion of the first loop portion and a second portion adjacent to a second portion of the second loop portion, wherein the generated current flows through the first portion of the first loop portion and the first portion of the second loop portion in a first direction and flows through the second portion of the first loop portion and the first portion of the third loop portion in a second direction, and wherein the generated current flows through the second portion of the second loop portion and the second portion of the third loop portion in opposite directions to create a field cancelling effect in the third area; and a receive circuit including a rectifier circuit, the receive circuit being electrically and conductively coupled to the first loop portion, wherein the receive circuit is configured to generate an output for at least one of powering or charging a load based at least in part on the generated current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for wirelessly receiving power, the apparatus comprising:
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a first means for wirelessly receiving power via a magnetic field; a second means for wirelessly receiving power via the magnetic field; a third means for wirelessly receiving power via the magnetic field, the third means for wirelessly receiving power not overlapping the second means for wirelessly receiving power via the magnetic field, the second and third means for wirelessly receiving power fully enclosed by the first means for wirelessly receiving power, the first, second, and third means for wirelessly receiving power physically connected in series, and the second means and the third means having an area therebetween, the second means having a first portion adjacent to a first portion of the first means, and the third means having a first portion adjacent to a second portion of the first means and a second portion adjacent to a second portion of the second means, wherein the generated current flows through the first portion of the first means and the first portion of the second means in a first direction and flows through the second portion of the first means and the first portion of the third means in a second direction, and wherein a current flows through the second portion of the second means and the second portion of the third means in opposite directions to create a field cancelling effect in the area; and means for providing an output power to a load, the means for providing being electrically and conductively coupled to the first means for wirelessly receiving power and being configured to generate the output power for at least one of powering or charging the load based at least in part on the current. - View Dependent Claims (29)
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18. A method of receiving wireless power, comprising:
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receiving, at a coil circuit configured to generate a current, wireless power from a transmitter via a magnetic field, the coil circuit comprising a conductive material having at least three loop portions, including a first loop portion, a second loop portion enclosing a first area, and a third loop portion enclosing a second area that is non-overlapping with the first area, the second and third loop portions fully enclosed by the first loop portion, the first loop portion, the second loop portion, and the third loop portion physically connected to create a single winding of the conductive material, the second loop portion and the third loop portion having a third area therebetween, the second loop portion having a first portion adjacent to a first portion of the first loop portion, and the third loop portion having a first portion adjacent to a second portion of the first loop portion and a second portion adjacent to a second portion of the second loop portion, wherein the generated current flows through the first portion of the first loop portion and the first portion of the second loop portion in a first direction and flows through the second portion of the first loop portion and the first portion of the third loop portion in a second direction, and wherein the generated current flows through the second portion of the second loop portion and the second portion of the third loop portion in opposite directions to create a field cancelling effect in the third area; and providing an output power from a receiver circuit including a rectifier circuit to a load, the receiver circuit being electrically and conductively coupled to the first loop portion and being configured to generate the output power for at least one of powering or charging the load based at least in part on the generated current. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification