Wireless power receiver and method of managing power thereof
First Claim
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1. A wireless power receiver to wirelessly receive power from a wireless power transmitter which receives power from a power supply device and transfers the power to a load, the wireless power receiver comprising:
- a receiving unit including a reception resonant coil to receive AC power from the wireless power transmitter through resonance between the reception resonant coil and a transmission resonant coil of the wireless power transmitter which are resonance-coupled with each other and operate at a resonant frequency band;
a rectifying unit to rectify the received AC power to DC power;
a switch to maintain or shut off the power transferred to the load; and
a controller to;
detect a first rectified DC power, which is rectified from the received AC power, that is less than a predetermined threshold to prevent an instant overvoltage from being transferred to the load,transmit, via a modulation unit through out-of-band communication at a specific frequency band other than the resonant frequency band, a signal to increase the AC power to be received from the wireless power transmitter and control the switch to allow the detected first rectified DC power to be transferred to the load in response to the detected first rectified DC power being less than the predetermined threshold,detect a second rectified DC power, which is rectified from the received AC power, that is equal to or greater than the predetermined threshold to prevent the instant overvoltage from being transferred to the load, andtransmit, via the modulation unit, a signal to decrease the AC power to be received from the wireless power transmitter and control the switch to prevent the detected second rectified DC power from being transferred to the load in response to the detected second rectified DC power being equal to or greater than the predetermined threshold,wherein the predetermined threshold is different than a charge quantity of the load.
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Abstract
Disclosed are a wireless power receiver and a method of managing the same. The wireless power receiver to wirelessly receive power from a wireless power transmitter and transmit the power to a load includes a receiving unit to receive AC power from the wireless power transmitter that receives power from a power supply device, a rectifying unit to rectify the received AC power to DC power, and a power managing unit to manage the power transmitted to the load based on the rectified DC power.
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Citations
12 Claims
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1. A wireless power receiver to wirelessly receive power from a wireless power transmitter which receives power from a power supply device and transfers the power to a load, the wireless power receiver comprising:
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a receiving unit including a reception resonant coil to receive AC power from the wireless power transmitter through resonance between the reception resonant coil and a transmission resonant coil of the wireless power transmitter which are resonance-coupled with each other and operate at a resonant frequency band; a rectifying unit to rectify the received AC power to DC power; a switch to maintain or shut off the power transferred to the load; and a controller to; detect a first rectified DC power, which is rectified from the received AC power, that is less than a predetermined threshold to prevent an instant overvoltage from being transferred to the load, transmit, via a modulation unit through out-of-band communication at a specific frequency band other than the resonant frequency band, a signal to increase the AC power to be received from the wireless power transmitter and control the switch to allow the detected first rectified DC power to be transferred to the load in response to the detected first rectified DC power being less than the predetermined threshold, detect a second rectified DC power, which is rectified from the received AC power, that is equal to or greater than the predetermined threshold to prevent the instant overvoltage from being transferred to the load, and transmit, via the modulation unit, a signal to decrease the AC power to be received from the wireless power transmitter and control the switch to prevent the detected second rectified DC power from being transferred to the load in response to the detected second rectified DC power being equal to or greater than the predetermined threshold, wherein the predetermined threshold is different than a charge quantity of the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of managing power in a wireless power receiver to wirelessly receive power from a wireless power transmitter which receives power from a power supply device and transfers the power to a load, the method comprising:
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receiving AC power from the wireless power transmitter through resonance between the wireless power receiver and the wireless power transmitter which are resonance-coupled with each other and operate at a resonant frequency band; rectifying the AC power to DC power via a rectifying unit; and managing power transmitted to the load based on the rectified DC power, wherein the managing power includes; detecting, via a controller, a first rectified DC power, which is rectified from the received AC power, that is less than a predetermined threshold to prevent an instant overvoltage from being transferred to the load; transmitting, via a modulation unit through out-of-band communication at a specific frequency band other than the resonant frequency band, a signal to increase the AC power to be received from the wireless power transmitter and controlling a switch to allow the detected first rectified DC power to be transferred to the load in response to the detected first rectified DC power being less than the predetermined threshold; detecting, via the controller, a second rectified DC power, which is rectified from the received AC power, that is equal to or greater than the predetermined threshold to prevent the instant overvoltage from being transferred to the load; and transmitting, via the modulation unit, a signal to decrease the AC power to be received from the wireless power transmitter and controlling the switch to prevent the detected second rectified DC power from being transferred to the load in response to the detected second rectified DC power being equal to or greater than the predetermined threshold, wherein the predetermined threshold is different than a charge quantity of the load. - View Dependent Claims (11, 12)
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Specification