Wireless power receiver and method for controlling the same
First Claim
1. A control method in a wireless power receiver that receives power from a wireless power transmitter, the method comprising:
- receiving the power from the wireless power transmitter wirelessly;
rectifying the received power;
modulating the rectified power by connecting one of a variable resistor and a variable capacitor of a modulator to a rectifier of the wireless power receiver or disconnecting one of the variable resistor and the variable capacitor of the modulator from the rectifier, wherein the variable resistor and the variable capacitor are disposed outside of a battery of the wireless power receiver;
monitoring a voltage value of the rectified power while modulating the rectified power;
determining whether a ripple of the voltage value of the rectified power is greater than or equal to a preset threshold; and
if the ripple of the voltage value of the rectified power is greater than or equal to the preset threshold, changing one of a resistance of the variable resistor and a capacitance of the variable capacitor during the modulation of the rectified power in real time to suppress the ripple below the preset threshold and charging the battery by using the rectified power of which the ripple is suppressed,wherein the ripple is caused by the modulation of the rectified wireless power.
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Accused Products
Abstract
A wireless power receiver that receives wireless power from a wireless power transmitter and a control method thereof are provided, wherein the wireless power receiver receives the wireless power from the wireless power transmitter; rectifies the wireless power; monitoring a voltage value of the rectified wireless power; determines whether a ripple of the voltage value of the wireless power is greater than or equal to a preset threshold; and if the ripple of the voltage value of the wireless power is greater than or equal to the preset threshold, changes at least one element value of the wireless power receiver to suppress the ripple below the preset threshold.
35 Citations
12 Claims
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1. A control method in a wireless power receiver that receives power from a wireless power transmitter, the method comprising:
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receiving the power from the wireless power transmitter wirelessly; rectifying the received power; modulating the rectified power by connecting one of a variable resistor and a variable capacitor of a modulator to a rectifier of the wireless power receiver or disconnecting one of the variable resistor and the variable capacitor of the modulator from the rectifier, wherein the variable resistor and the variable capacitor are disposed outside of a battery of the wireless power receiver; monitoring a voltage value of the rectified power while modulating the rectified power; determining whether a ripple of the voltage value of the rectified power is greater than or equal to a preset threshold; and if the ripple of the voltage value of the rectified power is greater than or equal to the preset threshold, changing one of a resistance of the variable resistor and a capacitance of the variable capacitor during the modulation of the rectified power in real time to suppress the ripple below the preset threshold and charging the battery by using the rectified power of which the ripple is suppressed, wherein the ripple is caused by the modulation of the rectified wireless power. - View Dependent Claims (2, 3, 4, 5)
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6. A power receiver for receiving power from a wireless power transmitter, comprising:
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a power receiver configured to receive the power from the wireless power transmitter wirelessly; a rectifier configured to rectify the received power; a modulator comprising one of a variable resistor and a variable capacitor and configured to modulate the rectified power by connecting one of the variable resistor and the variable capacitor to the rectifier or disconnecting one of the variable resistor and the variable capacitor of the modulator from the rectifier; a controller configured to; monitor a voltage value of the rectified power while modulating the rectified power, determine whether a ripple of the voltage value of the rectified power is greater than or equal to a preset threshold, and if the ripple of the voltage value of the wireless power is greater than or equal to a preset threshold, control to change one of a resistance of the variable resistor and a capacitance of the variable capacitor during the modulation of the rectified power in real time to suppress the ripple below the preset threshold; and a battery for charging by using the rectified power of which the ripple is suppressed, wherein the variable resistor and the variable capacitor are disposed outside of a battery of the wireless power receiver, and wherein the ripple is caused by the modulation of the rectified power. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification