Power receiving device, control method thereof, and feed system
A power receiving device of the present disclosure includes a power generating unit and a control unit. The power generating unit generates direct-current power, on a basis of a power signal supplied from a power feeding device wirelessly. The control unit sets, on a basis of an output current of the power generating unit, an upper limit of the output current or an upper limit of output power of the power generating unit.
1. A power receiving device comprising:
a control unit electrically connected directly to a power generating unit,
wherein the control unit is configured to:
receive, from the power generating unit, power that comprises an output current and an output voltage,
detect, after the control unit receives the power, an amount of the output current that is in the power,
control, after the control unit detects the amount of the output current, the power generating unit in a manner that causes the power generating unit to set the amount of the output current to a current-limiting value, and
control, after an elapse of a predetermined time since the output voltage becomes equal to or higher than a predetermined voltage, the power generating unit in a manner that causes the power generating unit to set the amount of the output current to the current-limiting value.
2. The power receiving device according to claim 1 , further comprising:
a load electrically connected directly to the control unit,
wherein the load is configured to receive the output voltage from the control unit.
3. The power receiving device according to claim 1 , further comprising:
a battery that stores the power.
4. The power receiving device according to claim 3 , further comprising:
a charge controller that controls a charging operation of the battery.
5. The power receiving device according to claim 3 , further comprising:
an electronic circuit that receives the power from the battery.
6. A power receiving device comprising:
a control unit electrically connected directly to a power generating unit,
wherein the control unit is configured to:
receive, from the power generating unit, power that comprises an output current and an output voltage,
detect, after the control unit receives the power, an amount of the output current that is in the power,
control, after the control unit detects the amount of the output current, the power generating unit in a manner that causes the power generating unit to set the amount of the output current to a current-limiting value, and
control, after an elapse of a time period since the control unit controls the power generating unit in a manner that sets the amount of the output current to another value, the power generating unit in a manner that causes the power generating unit to limit the amount of the output current to the current-limiting value.
7. The power receiving device according to claim 1 , further comprising:
a communication unit electrically connected directly to the power generating unit,
wherein the communication unit is configured to:
receive, from the power generating unit, a voltage before the communication unit controls the power generating unit in a manner that causes the power generating unit to adjust the voltage that is output from the power generating unit.
8. The power receiving device according to claim 1 ,
wherein the power generating unit configured to:
convert a signal into the power after the power receiving circuitry receives the signal wirelessly from a power feeding device.
9. A feed system comprising:
the power receiving device according to claim 8 ; and
the power feeding device.
10. A method of controlling a power receiving device, the method comprising:
receiving, from a power generating unit by a control unit that is electrically connected directly to the power generating unit, power comprising an output current and an output voltage;
detecting, by the control unit after the control unit receives the power, an amount of the output current that is in the power;
controlling, by the control unit after the control unit detects the amount of the output current, the power generating unit in a manner that causes the power generating unit to set the amount of the output current to a current-limiting value; and
receiving, from the power generating unit by a communication unit electrically connected directly to the power generating unit, a voltage before the communication unit controls the power generating unit in a manner that causes the power generating unit to adjust the voltage that is output from the power generating unit.
11. The method according to claim 10 , further comprising:
receiving, by a load electrically connected directly to the control unit, the output voltage from the control unit.
12. The method according to claim 10 , further comprising:
storing, by a battery, the power.
13. The method according to claim 12 , further comprising:
controlling, by a charge controller, a charging operation in the battery.
14. The method according to claim 12 , further comprising:
receiving, by an electronic circuit, the power from the battery.
15. The method according to claim 10 , further comprising:
controlling, by the control unit after an elapse of a predetermined time since the output voltage becomes equal to or higher than a predetermined voltage, the power generating unit in a manner that causes the power generating unit to set the amount of the output current to the current-limiting value.
16. The method according to claim 10 , further comprising:
controlling, by the control unit after an elapse of a time period since the control unit controls the power generating unit in a manner that sets the amount of the output current to another value, the power generating unit in a manner that causes the power generating unit to limit the amount of the output current to the current-limiting value.
17. The method according to claim 10 , further comprising:
converting, by the power generating unit, a signal into the power after the power receiving circuitry receives the signal wirelessly from a power feeding device.