WIRELESS POWER TRANSFER METHOD, APPARATUS AND SYSTEM FOR LOW AND MEDIUM POWER
First Claim
1. A wireless power transfer method for a wireless power transfer apparatus using full and half-bridge inverter topologies, the method comprising:
- applying a power signal by controlling a driving frequency to the half-bridge inverter to control an amount of power to be transferred;
receiving a control error packet from a wireless power receiver;
changing the inverter topology from the half-bridge into the full-bridge after receiving the control error packet if the wireless power receiver is a medium power wireless receiver; and
applying a power signal to the full bridge inverter to control an amount of power to be transferred.
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Accused Products
Abstract
A wireless power transfer method for a wireless power transfer apparatus using full and half-bridge inverter topologies includes detecting whether or not a wireless power receiver is present within a range of power being transferrable in a wireless manner, transmitting a detection signal to the wireless power receiver, receiving at least one of identification information and setting information from the wireless power receiver, receiving a control error packet from the wireless power receiver, and controlling an amount of power to be transferred by using the combination of a driving frequency, a duty cycle or a power signal phase to the full or half-bridge inverter.
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Citations
18 Claims
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1. A wireless power transfer method for a wireless power transfer apparatus using full and half-bridge inverter topologies, the method comprising:
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applying a power signal by controlling a driving frequency to the half-bridge inverter to control an amount of power to be transferred; receiving a control error packet from a wireless power receiver; changing the inverter topology from the half-bridge into the full-bridge after receiving the control error packet if the wireless power receiver is a medium power wireless receiver; and applying a power signal to the full bridge inverter to control an amount of power to be transferred. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of receiving power in a wireless manner from a wireless power transmitter using full and half-bridge inverter topologies, the method comprising:
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receiving a power signal controlled by a driving frequency from the half-bridge inverter to control an amount of power to be transferred; transmitting a control error packet from a wireless power receiver to the wireless power transmitter; and receiving a power signal controlled by at least one of the driving frequency or a duty cycle from the full-bridge inverter to control an amount of power to be transferred, wherein the inverter topology is changed from the half-bridge into the full-bridge after the control error packet is transmitted if the wireless power receiver is a medium power wireless receiver. - View Dependent Claims (12)
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13. A wireless power transmitter using full and half-bridge inverter topologies, the wireless power transmitter configured to:
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applying a power signal by controlling a driving frequency to the half-bridge inverter to control an amount of power to be transferred; receive a control error packet from a wireless power receiver; changing the inverter topology from the half-bridge into the full-bridge after receiving the control error packet if the wireless power receiver is a medium power wireless receiver; and applying a power signal by controlling at least one of the driving frequency or a duty cycle to the full bridge inverter to control an amount of power to be transferred. - View Dependent Claims (14, 15, 16)
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17. A wireless charging system comprising:
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a wireless power transmitter configured to transmit power in a wireless manner; and a wireless power receiver configured to receive the power from the wireless power transmitter in the wireless manner, wherein a power transfer unit of the wireless power transmitter comprises an LC circuit configured to be switched between a full-bridge and a half-bridge, wherein the wireless power receiver further configured to; transmit a control error packet from the wireless power receiver to the wireless power transmitter; and receive a power signal controlled by at least one of the driving frequency or a duty cycle from the full-bridge inverter to control an amount of power to be transferred, wherein the inverter topology is changed from the half-bridge into the full-bridge after the control error packet is transmitted if the wireless power receiver is a medium power wireless receiver.
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18. The wireless charging system of claim 19, wherein the wireless power transmitter and the wireless power receiver are configured to:
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detect by the wireless power transmitter whether or not the wireless power receiver is present; transmit by the wireless power transmitter a detection signal to the wireless power receiver; receive by the wireless power transmitter at least one of an identification packet or configuration information from the wireless power receiver; receive by the wireless power transmitter a control error packet from the wireless power receiver; and drive by the wireless power transmitter the power transfer unit using one of the full-bridge and the half-bridge based on whether or not the wireless power receiver corresponds to a medium power receiver or a low power receiver, informed by the wireless power receiver.
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Specification