Method for preventing abnormality during wireless charging
View Patent ↗Disclosed is a control method of a wireless power transmitter, including transmitting power to a plurality of wireless power receivers based on a first power value required by a first wireless power receiver from among the plurality of wireless power receivers, selecting, before reaching a threshold condition in which a system error occurs in the wireless power transmitter, a second wireless power receiver from among the plurality of wireless power receivers, and in response to the second wireless power receiver being selected, transmitting power to the plurality of wireless power receivers based on a second power value required by the second wireless power receiver, wherein the system error comprises at least one of an over-temperature error, an over-current error, and an over-voltage error.
1. A control method of a wireless power transmitter, the method comprising:
transmitting power to a plurality of wireless power receivers based on first power information of a first wireless power receiver from among the plurality of wireless power receivers;
selecting, before reaching a fault condition that requires power to be shut down in the wireless power transmitter, a second wireless power receiver from among the plurality of wireless power receivers; and
in response to the second wireless power receiver being selected, transmitting power to the plurality of wireless power receivers based on second power information of the second wireless power receiver,
wherein the fault condition comprises at least one of an over-temperature error, an over-current error, and an over-voltage error.
2. The method of claim 1 , further comprising:
transmitting a power adjust command to reduce the power to a lower percentage of a maximum received power level.
3. The method of claim 1 ,
wherein the over-voltage error is based on a measured voltage value exceeding a predetermined voltage value, the over-current error is based on a measured current value exceeding a predetermined current value, and the over-temperature error is based on a measured temperature value exceeding a predetermined temperature value.
4. The method of claim 2 ,
wherein the power adjust command is a control command for reducing power consumption of at least one wireless power receiver from among the plurality of wireless power receivers.
5. The method of claim 2 ,
wherein the power adjust command is included in a power receiving unit control signal.
6. The method of claim 1 , further comprising:
measuring at least one value of a voltage value, a current value, and a temperature value in the wireless power transmitter; and
determining that the power of the wireless power is shut down when the at least one value of the measured voltage value, the measured current value, and the measured temperature value falls within a predetermined range indicating that the at least one value approaches the fault condition set for determining whether power of the wireless power transmitter is shut down.
7. A wireless power transmitter for wirelessly charging a plurality of wireless power receivers, the wireless power transmitter comprising:
a power transmitter configured to wirelessly transmit power to the plurality of wireless power receivers based on a first power information of a first wireless power receiver;
a communication unit configured to transmit a signal to the plurality of wireless power receivers; and
a controller configured to:
select, before reaching a fault condition that requires power to be shut down in the wireless power transmitter, a second wireless power receiver from among the plurality of wireless power receivers; and
in response to the second wireless power receiver being selected, control the power transmitter to transmit power to the plurality of wireless power receivers based on a second power information of the second wireless power receiver,
wherein the fault condition comprises at least one of an over-temperature error, an over-current error, and an over-voltage error.
8. The wireless power transmitter of claim 7 ,
wherein the controller is further configured to transmit a power adjust command to reduce the power to a lower percentage of a maximum received power level.
9. The wireless power transmitter of claim 7 ,
wherein the over-voltage error is based on a measured voltage value exceeding a predetermined voltage value, the over-current error is based on a measured current value exceeding a predetermined current value, and the over-temperature error is based on a measured temperature value exceeding a predetermined temperature value.
10. The wireless power transmitter of claim 8 ,
wherein the power adjust command is a control command for reducing power consumption of at least one wireless power receiver from among the plurality of wireless power receivers.
11. The wireless power transmitter of claim 8 ,
wherein the power adjust command is included in a power receiving unit control signal.
12. The wireless power transmitter of claim 7 ,
wherein the controller is further configured to:
control to measure at least one value of a voltage value, a current value, and a temperature value in the wireless power transmitter; and
determine that the power of the wireless power transmitter is shut down when the at least one value of the measured voltage value, the measured current value, and the measured temperature value falls within a predetermined range indicating that the measured at least one value approaches the fault condition set for determining whether the power of the wireless power transmitter is hut down.
13. The method of claim 1 ,
wherein the wireless power transmitter enters a fault state if the wireless power transmitter reaches the fault condition.
14. The wireless power transmitter of claim 7 ,
wherein the wireless power transmitter enters a fault state if the wireless power transmitter reaches the fault condition.