Apparatus and method of protecting power receiver of wireless power transmission system
First Claim
1. A wireless power receiver comprising:
- a rectifier comprising an input and an output, and configured to receive a power through the input, to rectify the power to produce a rectified power, and to output the rectified power through the output;
a capacitor connected to the output of the rectifier and to ground;
a direct current-to-direct current (DC/DC) converter connected to the output of the rectifier and to a load, and configured to convert the rectified power to a converted power, and to provide the converted power to the load;
a switch unit connected to the input of the rectifier;
a protection unit configured to control the switch unit to open or close based on a voltage of the rectified power;
wherein the converted power changes the load, andwherein the protection unit is further configured to generate a switch control signal to comprise a first value when the load is being charged, and a second value when the load is fully charged; and
a communication/control unit configured toreceive, from the protection unit, the switch control signal, andtransmit, to a wireless power transmitter that transmits the power to the rectifier, a power transmission suspension signal when the switch control signal changes between the first value and the second value, an N number of times, N being an integer greater than or equal to 2.
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Accused Products
Abstract
An apparatus and method of protecting a power receiver of a wireless power transmission system are provided. A wireless power receiver includes a rectifier comprising an input and an output, and configured to receive a signal through the input, to rectify the signal to produce a rectified signal, and to output the rectified signal through the output, and a capacitor connected to the output of the rectifier and to ground. The wireless power receiver further includes a direct current-to-direct current (DC/DC) converter connected to the output of the rectifier and to a load, and configured to convert the rectified signal to a power, and to provide the power to the load, and a device configured to create a short circuit to protect the rectifier and/or the capacitor when a voltage greater than a threshold voltage is applied to the input of the rectifier and/or the output of the rectifier.
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Citations
9 Claims
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1. A wireless power receiver comprising:
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a rectifier comprising an input and an output, and configured to receive a power through the input, to rectify the power to produce a rectified power, and to output the rectified power through the output; a capacitor connected to the output of the rectifier and to ground; a direct current-to-direct current (DC/DC) converter connected to the output of the rectifier and to a load, and configured to convert the rectified power to a converted power, and to provide the converted power to the load; a switch unit connected to the input of the rectifier; a protection unit configured to control the switch unit to open or close based on a voltage of the rectified power; wherein the converted power changes the load, and wherein the protection unit is further configured to generate a switch control signal to comprise a first value when the load is being charged, and a second value when the load is fully charged; and a communication/control unit configured to receive, from the protection unit, the switch control signal, and transmit, to a wireless power transmitter that transmits the power to the rectifier, a power transmission suspension signal when the switch control signal changes between the first value and the second value, an N number of times, N being an integer greater than or equal to 2. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of receiving a wireless power, comprising:
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rectifying a power received from a resonator; converting the rectified power to a converted power; providing the converted power to a load; providing or blocking the rectifying of the power, by a switch control signal, based on a voltage of the rectified power, wherein the converted power charges the load, and wherein the switch control signal comprises a first value when the load is being charged, and a second value when the load is fully charged; and transmitting, to a wireless power transmitter that transmits the power to the resonator, a power transmission suspension signal when the number of times the switch control signal changes is greater than or equal to N, N being an integer greater than or equal to 2. - View Dependent Claims (8, 9)
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Specification