Energy transfer optimization by detecting and mitigating magnetic saturation in wireless charging with foreign object detection
First Claim
1. A method for optimizing wireless charging of a mobile device by a wireless charger, the method comprising:
- successively reducing transmit power in the wireless charger until an operating wireless transmit power is reached when a power loss occurring during a wireless transmission of power is caused by magnetic saturation, wherein the magnetic saturation occurs in at least one of the mobile device or the wireless charger, wherein the magnetic saturation is determined to have occurred when a percentage difference between the power loss and a second power loss is not equal to a fixed percentage within a margin of error, wherein the second power loss is determined for a second wireless transmission of power from the wireless charger to the mobile device, and wherein the magnetic saturation is reduced at the operating wireless transmit power; and
disabling charging by the wireless charger when the power loss occurring during the wireless transmission of power is caused by a foreign object present between the mobile device and the wireless charger.
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Accused Products
Abstract
A method is provided for optimizing wireless charging of a mobile device by a wireless charger. The method comprises successively reducing transmit power in the wireless charger until an operating wireless transmit power is reached when a power loss occurring during a wireless transmission of power is caused by magnetic saturation, wherein the magnetic saturation occurs in at least one of the mobile device and the wireless charger, wherein the wireless transmission of power is from the wireless charger to the mobile device, and wherein the magnetic saturation is reduced at the operating wireless transmit power, and disabling charging by the wireless charger when the power loss occurring during the wireless transmission of power is caused by a foreign object is present between the mobile device and the wireless charger.
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Citations
20 Claims
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1. A method for optimizing wireless charging of a mobile device by a wireless charger, the method comprising:
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successively reducing transmit power in the wireless charger until an operating wireless transmit power is reached when a power loss occurring during a wireless transmission of power is caused by magnetic saturation, wherein the magnetic saturation occurs in at least one of the mobile device or the wireless charger, wherein the magnetic saturation is determined to have occurred when a percentage difference between the power loss and a second power loss is not equal to a fixed percentage within a margin of error, wherein the second power loss is determined for a second wireless transmission of power from the wireless charger to the mobile device, and wherein the magnetic saturation is reduced at the operating wireless transmit power; and disabling charging by the wireless charger when the power loss occurring during the wireless transmission of power is caused by a foreign object present between the mobile device and the wireless charger. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A non-transitory, tangible computer readable storage medium encoded with computer executable instructions, wherein execution of the computer executable instructions is for:
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successively reducing transmit power in the wireless charger until an operating wireless transmit power is reached when a power loss occurring during a wireless transmission of power is caused by magnetic saturation, wherein the magnetic saturation occurs in at least one of the mobile device or the wireless charger, wherein the magnetic saturation is determined to have occurred when a percentage difference between the power loss and a second power loss is not equal to a fixed percentage within a margin of error, wherein the second power loss is determined for a second wireless transmission of power from the wireless charger to the mobile device, and wherein the magnetic saturation is reduced at the operating wireless transmit power; and disabling charging by the wireless charger when the power loss occurring during the wireless transmission of power is caused by a foreign object present between the mobile device and the wireless charger. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wireless charger comprising:
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a primary coil; and a processor coupled to the primary coil and configured to; successively reduce transmit power in the wireless charger until an operating wireless transmit power is reached when a power loss occurring during a wireless transmission of power is caused by magnetic saturation, wherein the magnetic saturation occurs in at least one of the mobile device or the wireless charger, wherein the magnetic saturation is determined to have occurred when a percentage difference between the power loss and a second power loss is not equal to a fixed percentage within a margin of error, wherein the second power loss is determined for a second wireless transmission of power from the wireless charger to the mobile device, and wherein the magnetic saturation is reduced at the operating wireless transmit power; and disable charging by the wireless charger when the power loss occurring during the wireless transmission of power is caused by a foreign object present between the mobile device and the wireless charger. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification