Wireless power receiver with multiple receiver coils
First Claim
1. A wireless power receiver configured to receive wireless power from a wireless power transmit coil, the wireless power receiver comprising:
- a first receive coil having a first mutual coupling with the transmit coil and positioned at a first distance from the transmit coil;
a second receive coil having a second mutual coupling with the transmit coil and positioned at a second distance from the transmit coil, the first distance different than the second distance, the second receive coil designed for substantially the same frequency of operation as the first receive coil; and
a load configured to selectively couple to the first receive coil when the second distance is greater than the first distance and selectively couple to the second receive coil when the first distance is greater than the second distance, such that the load is able to receive the wireless power via the first receive coil or the second receive coil,wherein an orientation of the first receive coil is variable with respect to an orientation of the second receive coil and an orientation of the transmit coil.
1 Assignment
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Accused Products
Abstract
Systems, methods and apparatus are disclosed for wireless power transfer using multiple receive coils. In one aspect a wireless power receiver is provided that is configured to receive wireless power from a wireless power transmit coil. The wireless power receiver includes a first receive coil having a first mutual coupling with the transmit coil. The wireless power receiver further includes a second receive coil having a second mutual coupling with the transmit coil. The wireless power receiver further includes a load coupled to at least one of the first receive coil and the second receive coil for receiving the wireless power.
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Citations
28 Claims
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1. A wireless power receiver configured to receive wireless power from a wireless power transmit coil, the wireless power receiver comprising:
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a first receive coil having a first mutual coupling with the transmit coil and positioned at a first distance from the transmit coil; a second receive coil having a second mutual coupling with the transmit coil and positioned at a second distance from the transmit coil, the first distance different than the second distance, the second receive coil designed for substantially the same frequency of operation as the first receive coil; and a load configured to selectively couple to the first receive coil when the second distance is greater than the first distance and selectively couple to the second receive coil when the first distance is greater than the second distance, such that the load is able to receive the wireless power via the first receive coil or the second receive coil, wherein an orientation of the first receive coil is variable with respect to an orientation of the second receive coil and an orientation of the transmit coil. - View Dependent Claims (2, 3, 4, 5, 6, 7, 27)
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8. A method of receiving wireless power from a wireless power transmit coil, the method comprising:
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selecting a first receive coil when a first distance between the first receive coil and the transmit coil is less than a second distance between a second receive coil and the transmit coil, the first receive coil having a first mutual coupling with the transmit coil, the second receive coil having a second mutual coupling with the transmit coil, and the first receive coil designed for substantially the same frequency of operation as the second receive coil; selecting the second receive coil when the second distance is less than the first distance; and coupling a load to the selected receive coil, such that the load is able to receive the wireless power via the first receive coil or the second receive coil, wherein an orientation of the first receive coil is variable with respect to an orientation of the second receive coil and an orientation of the transmit coil. - View Dependent Claims (9, 10, 11, 12, 13)
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14. An apparatus for receiving wireless power from a wireless power transmitter, the apparatus comprising:
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first means for receiving wireless power from the transmitter positioned at a first distance from the transmitter; second means for receiving wireless power from the transmitter positioned at a second distance from the transmitter, the first distance different than the second distance, the second means for receiving wireless power designed for substantially the same frequency of operation as the first means for receiving wireless power; and a load configured to selectively couple to the first means for receiving wireless power when the second distance is greater than the first distance and selectively couple to the second means for receiving wireless power when the first distance is greater than the second distance, such that the load is able to receive the wireless power via the first means for receiving wireless power or the second means for receiving wireless power, wherein an orientation of the first means for receiving wireless power is variable with respect to an orientation of the second means for receiving wireless power and an orientation of the transmitter. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
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select a first receive coil when a first distance between the first receive coil and a transmit coil is less than a second distance between a second receive coil and the transmit coil, the first receive coil having a first mutual coupling with the transmit coil, the second receive coil having a second mutual coupling with the transmit coil, and the first receive coil designed for substantially the same frequency of operation as the second receive coil; select the second receive coil when the second distance is less than the first distance; and couple a load to the selected receive coil, such that the load is able to receive wireless power via the first receive coil or the second receive coil, wherein an orientation of the first receive coil is variable with respect to an orientation of the second receive coil and an orientation of the transmit coil. - View Dependent Claims (22, 23, 24, 25, 26)
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28. A wireless power receiver configured to receive wireless power from a wireless power transmit coil, the wireless power receiver comprising:
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a load configured to receive wireless power; a first receive coil having a first mutual coupling with the transmit coil and positioned at a first distance from the transmit coil; a second receive coil having a second mutual coupling with the transmit coil and positioned at a second distance from the transmit coil, the first distance different than the second distance, the second receive coil designed for substantially the same frequency of operation as the first receive coil, wherein an orientation of the first receive coil is variable with respect to an orientation of the second receive coil and an orientation of the transmit coil; a first rectifier coupled to the first receive coil; a second rectifier coupled to the second receive coil; and a regulator configured to couple the first rectifier and the second rectifier to the load, such that the load is coupled to at least one of the first receive coil and the second receive coil, wherein the first rectifier and the second rectifier are configured to act in a diode OR configuration, the first rectifier configured to conduct voltage to the regulator when a first induced voltage of the first receive coil is greater than a second induced voltage of the second receive coil and when the first distance is less than the second distance, and the second rectifier configured to conduct voltage to the regulator when the second induced voltage is greater than the first induced voltage and when the second distance is less than the first distance.
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Specification