Wireless power transmitter and method of controlling power thereof
AssigneeLG Innotek Co., Ltd.
InventorSU HO BAE
Life of this patent
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Abstract
Disclosed are a wireless power transmitter and a method of controlling power thereof. A wireless power transmitter includes a power supply device to supply AC power to the wireless power transmitter; and a transmission coil to transmit the AC power to a reception coil of a wireless power receiver by resonance. The wireless power transmitter controls transmission power to be transmitted to the wireless power receiver based on a coupling state between the transmission coil and the reception coil.
Claims30
A wireless power transmitter comprising:
- a transmission coil configured to wirelessly transmit power to a reception coil of a wireless power receiver;
- and
- a controller configured to limit transmission power based on a coupling state between the transmission coil and the reception coil,
- wherein the controller is configured to limit the transmission power to a first power when the coupling state has a first coupling state, and to limit the transmission power to a second power when the coupling state has a second coupling state different from the first coupling state,
- wherein a first coupling coefficient of the first coupling state is greater than a second coupling coefficient of the second coupling state, and
- wherein the first power is greater than the second power.
A wireless power transmitter comprising:
- a transmission coil configured to wirelessly transmit power to a reception coil of a wireless power receiver;
- and
- a controller configured to limit a current input to the transmission coil based on a coupling state between the transmission coil and the reception coil,
- wherein the controller is configured to the current to a first current when the coupling state has a first coupling state, and to limit the current to a second current when the coupling state has a second coupling state different from the first coupling state,
- wherein a first coupling coefficient of the first coupling state is greater than a second coupling coefficient of the second coupling state, and
- wherein the first current is greater than the second current.
A method of transmitting a wireless power, the method comprising:
- wirelessly transmitting, by a wireless power transmitter, power to a reception coil of a wireless power receiver;
- and
- limiting, by a controller, transmission power based on a coupling state between the transmission coil and the reception coil,
- wherein the limiting of the transmission power comprises:
- limiting the transmission power to a first power when the coupling state has a first coupling state;
- and
- limiting the transmission power to a second power when the coupling state has a second coupling state different from the first coupling state,
- wherein a first coupling coefficient of the first coupling state is greater than a second coupling coefficient of the second coupling state, and
- wherein the first power is greater than the second power.
A method of transmitting a wireless power, the method comprising:
- wirelessly transmitting, by a wireless power transmitter, power to a reception coil of a wireless power receiver;
- and
- limiting, by a controller, a current input to the transmission coil based on a coupling state between the transmission coil and the reception coil,
- wherein the limiting of the transmission power comprises:
- limiting the current to a first current when the coupling state has a first coupling state;
- and
- limiting the current to a second current when the coupling state has a second coupling state different from the first coupling state,
- wherein a first coupling coefficient of the first coupling state is greater than a second coupling coefficient of the second coupling state, and
- wherein the first current is greater than the second current.
Dependencies are inferred from the claim text.