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:
- determining whether magnetic saturation occurred in at least one of the mobile device and the wireless charger during a wireless transmission of power from the wireless charger to the mobile device; and
when magnetic saturation is determined to have occurred, successively reducing transmit power in the wireless charger until reaching an operating wireless transmit power, wherein neither the mobile device nor the wireless charger is in magnetic saturation at the operating wireless transmit power.
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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 determining whether magnetic saturation occurred in at least one of the mobile device and the wireless charger during a first wireless transmission of power from the wireless charger to the mobile device; and, when magnetic saturation is determined to have occurred, successively reducing transmit power in the wireless charger until reaching an operating wireless transmit power, wherein neither the mobile device nor the wireless charger is in magnetic saturation at the operating wireless transmit power.
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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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determining whether magnetic saturation occurred in at least one of the mobile device and the wireless charger during a wireless transmission of power from the wireless charger to the mobile device; and when magnetic saturation is determined to have occurred, successively reducing transmit power in the wireless charger until reaching an operating wireless transmit power, wherein neither the mobile device nor the wireless charger is in magnetic saturation at the operating wireless transmit power. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of wirelessly charging a mobile device by a wireless charger, the method comprising:
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determining a first power loss for a first wireless transmission of power to the mobile device; when the first power loss is greater than a threshold, determining a second power loss for a second wireless transmission of power to the mobile device, wherein the power of the second wireless transmission is reduced by a fixed percentage relative to the power of the first wireless transmission; determining a percentage difference between the first power loss and the second power loss; and when the percentage difference is not equal, within a defined margin of error, to the fixed percentage, determining that magnetic saturation has occurred in at least one of 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; determine whether magnetic saturation occurred in at least one of the primary coil and a mobile device being charged by the wireless charger during a wireless transmission of power from the wireless charger to the mobile device; and when magnetic saturation is determined to have occurred, successively reduce current in the primary coil until reaching an operating wireless transmit power, wherein neither the primary coil nor the mobile device is in magnetic saturation at the operating wireless transmit power. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification