METHOD FOR WIRELESSLY CHARGING MULTI-NODE WIRELESS POWER TRANSMITTING SYSTEM
First Claim
1. A multi-node wireless charging method for a wireless power supply apparatus to charge a plurality of wirelessly chargeable devices in a multi-node wireless power transmission system including the wireless power supply apparatus and the wirelessly chargeable devices spaced apart from the wireless power supply apparatus and wirelessly communicating with the wireless power supply apparatus, the multi-node wireless charging method comprising:
- transmitting an association request frame;
receiving association response frames from the wirelessly chargeable devices;
transmitting a power transmission request frame;
receiving charging request response frames from the wirelessly chargeable devices;
transmitting wireless-charging schedule information for the wirelessly chargeable devices having transmitted the charging request response frames; and
transmitting power to the wirelessly chargeable devices according to the wireless-charging schedule information,wherein the transmitting of the power comprises monitoring a change of a power transmission environment by measuring a voltage or a current of the wireless power supply apparatus.
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Accused Products
Abstract
The present invention relates to a method for wirelessly charging a multi-node wireless power transmitting system which can efficiently perform charging using wireless communication. According to the method, a wireless power supply apparatus detects a change in a power transmission environment on the basis of a current/voltage change to accordingly perform rematching or reschedule, and combines and uses a power transmission method through time division for the simultaneous charging of a plurality of devices and a simultaneous power transmission method through multi-matching.
22 Citations
19 Claims
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1. A multi-node wireless charging method for a wireless power supply apparatus to charge a plurality of wirelessly chargeable devices in a multi-node wireless power transmission system including the wireless power supply apparatus and the wirelessly chargeable devices spaced apart from the wireless power supply apparatus and wirelessly communicating with the wireless power supply apparatus, the multi-node wireless charging method comprising:
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transmitting an association request frame; receiving association response frames from the wirelessly chargeable devices; transmitting a power transmission request frame; receiving charging request response frames from the wirelessly chargeable devices; transmitting wireless-charging schedule information for the wirelessly chargeable devices having transmitted the charging request response frames; and transmitting power to the wirelessly chargeable devices according to the wireless-charging schedule information, wherein the transmitting of the power comprises monitoring a change of a power transmission environment by measuring a voltage or a current of the wireless power supply apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A wireless power supply apparatus wirelessly communicating with a plurality of wirelessly chargeable devices and supplying wireless power to the plurality of wirelessly chargeable devices, the wireless power supply apparatus comprising:
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an oscillator configured to generate a signal of a predetermined uniform frequency; an amplifier configured to amplify the signal generated by the oscillator; a matching circuit configured to frequency match the signal amplified by the amplifier; a transmitting antenna configured to transmit the signal frequency-matched by the matching circuit to the wirelessly chargeable devices; a rectifier configured to convert an alternating current (AC) voltage applied through the matching circuit into a direct current (DC) voltage; a current/voltage checker connected to the rectifier and configured to check a change of a current and/or the voltage; and a communication signal processor connected to the matching circuit and configured to process a communication signal with the wirelessly chargeable devices.
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11. A multi-node wireless charging method for a wireless power supply apparatus to charge a plurality of wirelessly chargeable devices in a multi-node wireless power transmission system including the wireless power supply apparatus and the wirelessly chargeable devices spaced apart from the wireless power supply apparatus and wirelessly communicating with the wireless power supply apparatus, the multi-node wireless charging method comprising:
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transmitting wireless power to the wirelessly chargeable devices during a power transmission period divided into two or more slots so as to transmit the wireless power using a time-division method, wherein the wireless power is simultaneously transmitted to two or more of the wirelessly chargeable devices in one of the slots. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification