Charging control device, charging control method and wireless power receiving device equipped with same
First Claim
1. A wireless power receiver receiving power from a wireless power transmitter and transmitting the power to a load, the wireless power receiver comprising:
- a receiving coil configured to receive AC power from the wireless power transmitter;
a rectifier configured to rectify the AC power into a DC voltage;
a capacitor;
a comparator configured to compare a voltage of the capacitor with a reference voltage and generate an output signal based on a comparison result to control a supply of the DC voltage to the load;
a switch connected between the rectifier and the capacitor; and
a controller configured to monitor the DC voltage at an output of the rectifier,wherein the wireless power receiver transmits and receives information with the wireless power transmitter through in-band communication,wherein the controller creates a control signal to adjust the AC power from the wireless power transmitter and continuously charges the load, when a charging state is changed,wherein when the switch is turned on, the capacitor is charged, andwherein when the switch is turned off, the capacitor is discharged.
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Abstract
A wireless power receiver for transferring a power received from a wireless power transmitter to a load, the wireless power receiver including a receiving coil configured to receive an AC power from the wireless power transmitter, a rectifier configured to rectify the AC power into a DC power and a controller configured to monitor a DC voltage at an output of the rectifier, in which the wireless power receiver transceives information with the wireless power transmitter through an in-band communication, and the controller creates a control signal to adjust the AC power received from the wireless power transmitter and continuously is configured to charge the load when a charging state is changed.
15 Citations
20 Claims
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1. A wireless power receiver receiving power from a wireless power transmitter and transmitting the power to a load, the wireless power receiver comprising:
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a receiving coil configured to receive AC power from the wireless power transmitter; a rectifier configured to rectify the AC power into a DC voltage; a capacitor; a comparator configured to compare a voltage of the capacitor with a reference voltage and generate an output signal based on a comparison result to control a supply of the DC voltage to the load; a switch connected between the rectifier and the capacitor; and a controller configured to monitor the DC voltage at an output of the rectifier, wherein the wireless power receiver transmits and receives information with the wireless power transmitter through in-band communication, wherein the controller creates a control signal to adjust the AC power from the wireless power transmitter and continuously charges the load, when a charging state is changed, wherein when the switch is turned on, the capacitor is charged, and wherein when the switch is turned off, the capacitor is discharged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless power receiving method of a wireless power receiver receiving power from a wireless power transmitter and transmitting the power to a load, the wireless power receiving method comprising:
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receiving, by a receiving coil, AC power from the wireless power transmitter; rectifying, by a rectifier, the AC power into a DC voltage; monitoring, by a controller, the DC voltage at an output of the rectifier; transceiving information with the wireless power transmitter through in-band communication; and creating a control signal to adjust the AC power from the wireless power transmitter and continuously charging the load when a charging state is changed, wherein the monitoring of the DC voltage comprises; comparing a voltage of a capacitor with a reference voltage and generating an output signal according to a comparison result; and switching a switch connected between a front end of the capacitor and a back end of the rectifier, wherein when the switch is turned on, the capacitor is charged, and wherein when the switch is turned off, the capacitor is discharged. - View Dependent Claims (18, 19, 20)
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Specification