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1. US20180226829 - WIRELESS POWER TRANSMISSION SYSTEM, AND OPERATION METHOD THEREFOR

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims

1. A method of driving a power transfer unit transferring wireless charge power to a plurality of power receiver units, wherein the power transfer unit receives a parameter including information about output voltages of AC/DC converters of the power receiver units and output power of the power receiver units and creates power receiver unit control information including an optimum output control voltage on the basis of the parameter, and
the power receiver unit control information is transmitted to at least one of the power receiver units, and the power receiver unit receiving the power receiver unit control information receives information about a requested voltage generated on the basis of the optimum output control voltage and generates wireless power on the basis of the information about the requested voltage.
2. The method of claim 1, wherein information about the parameter and the requested voltage includes information about at least one of a maximum output voltage that is a maximum value, a minimum output voltage that is a minimum value, and an optimum output voltage that is an optimum value of the output voltage.
3. The method of claim 1, wherein the power receiver unit control information further includes information for enabling/disabling and permitting charge.
4. The method of claim 2, wherein the power receiver units include first and second power receiver units, and
the power transfer unit generates first and second optimum output control voltages for the first and second power receiver units on the basis of first output power and a first output voltage of a first AC/DC converter of the first power receiver unit and second output power and a second output voltage of a second AC/DC converter of the second power receiver unit.
5. The method of claim 4, wherein the power transfer unit determines whether the relationship between the first and second output power and the first and second output voltages satisfies the following equation 1,

(NB)
where P rx1 is the first output power, P rx2 is the second output power, V rect1 is the first output voltage, and V rect2 is the second output voltage.
6. The method of claim 5, wherein a first output control voltage satisfying the equation 1 is set within a range between a maximum value and a minimum value of the first output voltage and first power receiver unit control information including information about the first output control voltage to the first power receiver unit, and
a first requested voltage generated on the basis of the first power receiver unit control information by the first power receiver unit and wireless power is generated on the basis of the first requested voltage.
7. The method of claim 5, wherein a second output control voltage satisfying the equation 1 is set within a range between a maximum value and a minimum value of the second output voltage and second power receiver unit control information including information about the second output control voltage to the second power receiver unit, and
a second requested voltage generated on the basis of the second power receiver unit control information by the second power receiver unit and wireless power is generated on the basis of the second requested voltage.
8. The method of claim 5, wherein when there is no first output control voltage satisfying the equation 1 within a range between the maximum value and the minimum value of the first output voltage or when there is no second output control voltage satisfying the equation 1 within the maximum value and the minimum value of the second output voltage,
the first output control voltage is set as any one of the maximum value and the minimum value of the first output voltage, and
the second output control voltage is set as any one of the maximum value and the minimum value of the second output voltage.
9. The method of claim 8, wherein when the first output power is larger than the second output power, the first output control voltage is set as the maximum value of the first output voltage and the second output control voltage is set as the minimum value of the second output voltage.
10. The method of claim 8, wherein when the first output voltage is smaller than the second output voltage, the first output control voltage is set as the minimum value of the first output voltage and the second output control voltage is set as the maximum value of the second output voltage.
11.- 18. (canceled)
19. A wireless power reception method of a wireless power receiver unit receiving wireless power from a wireless power transfer unit, the method comprising:
transmitting first reception power information to the power transfer unit;
receiving power receiver unit control information from the power transfer unit;
determining second reception power information on the basis of the power receiver unit control information;
transmitting the second reception power information to the power transfer unit; and
receiving wireless power adjusted on the basis of the second reception power information from the power transfer unit.
20. The method of claim 19, wherein the reception power information includes information about at least one of output voltages of AC/DC converters of the power receiver units, and a maximum output voltage that is a maximum value, a minimum output voltage that is a minimum value, and an optimum output voltage that is an optimum value of the output voltage.
21. The method of claim 19, wherein the power receiver unit control information includes the optimum output control voltage, and
the second reception power information is determined on the basis of the optimum output control voltage.
22. (canceled)
23. The method of claim 21, wherein the power transfer unit provides wireless power to a separate power receiver unit that is discriminated from the power receiver unit, and an optimum output control voltage of the power receiver unit is determined, using an output voltage value of an AC/DC converter of the power receiver unit and an output voltage value of an AC/DC converter of the separate power receiver unit.
24. The method of claim 23, wherein optimum output control voltages of the power receiver unit and the separate power receiver unit include the first output voltage V rect1 or the second output voltage V rect2 that satisfies the following equation 1,

(NB)
where P rx1 and P rx2 are output power values of the AC/DC converters of the power receiver unit and the separate power receiver units.
25. The method of claim 24, wherein the optimum output control voltages of the power receiver unit and the separate power receiver unit are not included in range between a maximum output voltage and a minimum output voltage included in the first reception power information of the power receiver unit and the separate power receiver unit, the optimum output control voltages of the power receiver unit and the separate power receiver unit are set as the maximum output voltage or the minimum output voltage.
26.- 33. (canceled)
34. A power transfer unit comprising:
a transfer-side resonant circuit resonantly coupled to reception-side resonant circuits of a plurality of power receiver units;
a power converter generating and outputting AC power to the transfer-side resonant circuit; and
a controller controlling the power converters,
wherein the power transfer unit generates and transfers the an optimum rectified control voltage on the basis of minimum and maximum values of rectified voltages of the power receiver units, and generates wireless power on the basis of requested voltages of the power receiver units generated on the basis of the optimum rectified control voltage.
35. The power transfer unit of claim 34, wherein the power transfer unit receives first output power of a first power receiver unit that is any one of the power receiver units and second output power of a second power receiver that is another one of the power receiver units and then sets the optimum rectified control voltage on the basis of the first and second output power.
36. The power transfer unit of claim 35, wherein when the first output power is smaller than the second output power, the optimum rectified control voltage is generated such that a requested voltage of the first power receiver unit is smaller than a requested voltage of the second power receiver unit.
37. The power transfer unit of claim 35, wherein when the first output power is smaller than the second output power and the optimum rectified control voltage, which is generated such that a requested voltage of the first power receiver unit is smaller than a requested voltage of the second power receiver unit, cannot be set within a range between a minimum value and a maximum value of the rectified voltage, the rectified control voltage is set such that the requested voltage of the first power receiver unit becomes a minimum value of a rectified voltage of the first power receiver unit and the requested voltage of the second power receiver unit becomes a maximum value of a rectified voltage of the second power receiver unit.
38.- 42. (canceled)