Wireless power transmitting system, power receiving station, power transmitting station, and recording medium

• US 8,786,134 B2
• Filed: 03/30/2010
• Issued: 07/22/2014
• Est. Priority Date: 03/31/2009
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kazama, Satoshi, Nakashima, Yoshiyasu, Shibata, Seiki, Tamura, Yuki
• Primary Examiner(s): AMAYA, CARLOS DAVID
• Application Number:
  US12/749,670
• Publication Number:
  US 20100264746A1
• Time in Patent Office: 1,575 Days
• Field of Search: 307/104, 320/108
• US Class Current: 307/104
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02J 50/80 involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
• CPC Class Codes: H02J 7/00034 Charger exchanging data with an electronic device, i.e. telephone, whose internal battery is under charge
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/18 TPC being performed according to specific parameters

Abstract

A wireless power transmitting system that transmits power from a power transmitting station to a power receiving station wirelessly includes the power receiving station. The power receiving station includes a unit receiving power from the power transmitting station, a unit obtaining a level of power received through the antenna, a unit obtaining a level of power consumed by the device operating while being supplied with received power and a unit transmitting the received power level and the power consuming level to the power transmitting station wirelessly. The power transmitting station includes a unit receiving the received power level and the power consuming level from the power receiving station wirelessly, a unit controlling the level of power transmitted through the transmitting antenna based on the difference between the received power level and the received power consuming level, and a unit transmitting power to the power receiving station wirelessly.

Claims

1. A wireless power transmitting system comprising:

a first station including a transmitting antenna that transmits a first power; and

a second station including a receiving antenna that receives power from the transmitting antenna in a wireless manner and which is operatively associated with a device operating while being supplied with the received power,

the second station executes a procedure including;

obtaining a received power level indicating a level of the received power,

obtaining a power consuming level indicating a level of power consumed by the device operating while being supplied with the received power, and

transmitting the received power level and the power consuming level to the first station by wireless; and

the first station executes a procedure including;

receiving the received power level and the power consuming level from the second station by wireless,

controlling a level of power to be transmitted to the second station through the transmitting antenna based on a difference between the received power level and the received power consuming level, and

transmitting a second power to the second station in the wireless manner based on the controlled level of power.

2. The wireless power transmitting system according to claim 1, the procedure executed by the first station further comprising:

obtaining the difference by subtracting the received power level from the power consuming level,

when the difference exceeds a threshold value, the controlling increases the level of power transmitted through the transmitting antenna.

3. The wireless power transmitting system according to claim 2, the first station further comprising:

a memory;

the procedure executed by the first station further comprising;

obtaining operating modes of the device; and

getting a margin power level corresponding to the operating mode obtained by the obtaining from the memory, the memory storing the margin power level indicating the level of margin power presenting a variation in power consumption for each operating mode of the device,

the obtaining obtains the difference by subtracting the received power level from the sum of the margin power level and the power consuming level.

4. A station that is operatively associated with a device operating while being supplied with power, the station comprising:

an antenna that receives a first power transmitted from an other station in the wireless manner; and

a processor that executes a procedure including;

obtaining a received first power level indicating a level of the received first power,

obtaining a power consuming level indicating a level of power consumed by the device operating while being supplied with the received power, and

transmitting the received first power level and the power consuming level to the other station by wireless,

the antenna receives a second power based on the received power level and the power consuming level from the other station in the wireless manner.

5. The station according to claim 4, the procedure further comprising:

generating, based on the difference between the received power level and the power consuming level, a control signal to control the level of power transmitted from the other station,

the transmitting transmits the control signal to the other station with a frequency band different from a frequency band for wireless power transmission.

6. A station comprising:

an antenna that transmits a first power to an other station in a wireless manner; and

a processor that executes a procedure including;

receiving a received power level indicating a level of power received through the antenna and a power consuming level indicating a level of power consumed by a device from the other station, the device operating while being supplied with received power,

controlling a level of power to be transmitted to the other station through the antenna based on a difference between the received power level and the received power consuming level, and

transmitting a second power supplied from a power supply to the other station in the wireless manner based on the controlled level of power.

7. The station according to claim 6, the procedure further comprising:

obtaining the difference by subtracting the received power level from the received power consuming level,

when the difference exceeds a threshold value, the controlling increases the level of power transmitted through the antenna.

8. The power transmitting station according to claim 7, further comprising:

a memory,

the procedure further comprising;

obtaining an operating mode of the device, and

getting a margin power level corresponding to the operating mode obtained by the obtaining from the memory, the memory storing the margin power level indicating the level of margin power representing a variation in power consumption for each operating mode of the device,

the obtaining obtains the difference by subtracting the received power level from the sum of the margin power level and the power consuming level.

9. A non-transitory recording medium storing a program for causing a computer to function as a station which receives a first power transmitted from an other station in a wireless manner through an antenna and is operatively associated with a device operating while being supplied with the received power, the program causing the computer to execute:

obtaining a received power level indicating a level of the received power,

obtaining a power consuming level indicating a level of power consumed by the device operating while being supplied with the received power; and

transmitting the received power level and the power consuming level to the other station in the wireless manner, wherein

the antenna receives from the other station in the wireless manner a second power based on a difference between the received power level and the power consuming level.

11. The non-transitory recording medium according to claim 9, the program further causes the computer to execute:

generating, based on the difference between the received power level and the power consuming level, a control signal to control the level of power transmitted from the other station,

the transmitting transmits the control signal to the other station with a frequency band different from a frequency band for wireless power transmission.

10. A non-transitory recording medium storing a program for causing a computer to function as a station which transmits a first power through an antenna to an other station in a wireless manner, the program causing the computer to execute:

receiving a received power level indicating a level of power received by the other station and a power consuming level indicating a level of power consumed by a device from the other station, the device operating while being supplied with the received power;

controlling a level of power to be transmitted to the other station through the antenna based on a difference between the received power level and the received power consuming level; and

transmitting a second power supplied from a power supply to the other station in the wireless manner based on the controlled level of power.

12. The non-transitory recording medium according to claim 10, the program further causes the computer to execute:

obtaining the difference by subtracting the received power level from the received power consuming level,

when the difference exceeds a threshold value, the controlling increases the level of power transmitted through the antenna.

13. The non-transitory recording medium according to claim 12, the computer includes a memory, the program further causes the computer to execute:

obtaining an operating mode of the device, and

getting a margin power level corresponding to the operating mode obtained by the obtaining from the memory, the memory being stored the margin power level indicating the level of margin power representing a variation in power consumption for each operating mode of the device,

the obtaining obtains the difference by subtracting the received power level from the sum of the margin power level and the power consuming level.