Power transmission control device, power transmission device, power receiving control device, power receiving device, electronic apparatus, method for controlling power transmission, and method for controlling power receiving

• US 8,274,254 B2
• Filed: 06/24/2009
• Issued: 09/25/2012
• Est. Priority Date: 06/25/2008
• Status: Active Grant

• Current Assignee: 138 East LCD Advancements Limited (Vector Capital Corporation)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kamijo, Takahiro, Kondo, Yoichiro, Onishi, Kota, Kamiyama, Masayuki, Shiozaki, Nobutaka, Yoda, Kentaro
• Primary Examiner(s): WILLIAMS, ARUN C
• Application Number:
  US12/490,839
• Publication Number:
  US 20090322281A1
• Time in Patent Office: 1,189 Days
• Field of Search: 320/108
• US Class Current: 320/108
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• 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: H02J 9/005 using a power saving mode for copiers G03G15/5004
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 40/12 characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment

Abstract

A power transmission control device included in a contactless power transmission system that transmits power by electromagnetically coupling a primary coil and a secondary coil from a power transmission device to a power receiving device so as to supply the power to a load of the power receiving device includes: a controller that controls the power transmission device. The controller includes: a negotiation processing section that performs a negotiation process of contactless power transmission; and a setup processing section that performs a setup process of the contactless power transmission based on a result of the negotiation process. In the device, normal power transmission from the power transmission device to the power receiving device is started after the setup process.

Claims

1. A power transmission control device included in a contactless power transmission system that transmits power by electromagnetically coupling a primary coil from a power transmission device to a secondary coil from a power receiving device to supply the power to a load of the power receiving device, the power transmission control device comprising:

a controller that controls the power transmission device, the controller including;

a negotiation processing section that performs a negotiation process of contactless power transmission; and

a setup processing section that performs a setup process of the contactless power transmission based on a result of the negotiation process,

the controller exchanging information between the power transmission device and the power receiving device during the negotiation process and the setup process,

the controller confirming whether or not the information exchanged between the power transmission device and the power receiving device matches with each other,

the information including at least one of standard information and coil information, and

the controller executing a normal power transmission from the power transmission device to the power receiving device.

2. The power transmission control device of claim 1, the controller further comprising:

a command processing section that performs a command process of the contactless power transmission after the setup process, the command process starting the normal power transmission from the power transmission device to the power receiving device.

3. The power transmission control device of claim 2, the command process comprising the execution of a command that is confirmed to be available by at least one of the negotiation process and the setup process.

4. The power transmission control device of claim 3, the command comprising at least one of:

a command for starting the normal power transmission;

a command for detecting a full charge of a battery included in the load; and

a command for confirming whether or not a recharge of the battery is required.

5. The power transmission control device of claim 1, the negotiation process being at least one of:

a confirmation process that confirms whether or not information can be communicated between the power transmission device and the power receiving device;

a confirmation process that confirms whether or not the communicated information is adequate;

a confirmation process that confirms whether or not the load of the power receiving device is appropriate;

a checking process that checks at least one of standard information and coil information between the power transmission device and the power receiving device; and

a checking process that checks system information of the power transmission device, the information providing a load condition based on system information of the power receiving device.

6. The power transmission control device of claim 1, the setup process being at least one of:

a process in which a transmission condition of the power is set based on a result of the negotiation process; and

a process in which information on a corresponding function between the power transmission device and the power receiving device is exchanged.

7. The power transmission control device of claim 1, under the condition that the power receiving device transmits transmission condition information of the contactless power transmission, the setup process section receives the transmission condition information so as to set a transmission condition of the contactless power transmission.

8. The power transmission control device of claim 1, the controller controlling the power transmission device comprising:

a process that stops the normal power transmission under the condition that the power receiving device requests a power transmission stop.

9. The power transmission control device of claim 1, the controller controlling the power transmission device comprising:

a process that stops the normal power transmission from the power transmission device to the power receiving device under the condition that a full charge of a battery included in the load of the power receiving device is detected.

10. The power transmission control device of claim 9, the controller controlling the power transmission device comprising:

a process that stops normal power transmission in response to detecting a full charge on the power receiving device; and

a process that places the power transmission device into a standby phase after detecting the full charge.

11. The power transmission control device of claim 10, the controller controlling the power transmission device comprising:

a process that confirms a recharge of the battery in the standby phase after detecting the full charge.

12. The power transmission control device of claim 11, the controller controlling the power transmission device comprising:

a process that maintains a flag for confirming a recharge in a set state without clearing the flag in the standby phase after detecting the full charge.

13. The power transmission control device of claim 10, the controller controlling the power transmission device comprising:

a process that sets the power transmission device into a standby phase after detecting a removal of an electronic apparatus from the power receiving side.

14. The power transmission control device of claim 13, the controller controlling the power transmission device comprising:

a process that sets the power transmission device into a phase of the negotiation process in response to detecting placement of the electronic apparatus on the power receiving side while the power transmission device is in the standby phase.

15. A power transmission device, comprising:

the power transmission control device of claim 1; and

a power transmission section that generates an alternate current voltage to supply the voltage to the primary coil.

16. A power receiving control device included in a contactless power transmission system that transmits power to a power receiving device by electromagnetically coupling a primary coil of a power transmission device with a secondary coil of the power receiving device to supply the power to a load of the power receiving device, the power receiving control device comprising:

a controller that controls the power receiving device, the controller including;

a negotiation processing section that performs a negotiation process of contactless power transmission;

a setup processing section that performs a setup process of the contactless power transmission based on a result of the negotiation process,

the controller exchanging information between the power transmission device and the power receiving device during the negotiation process and the setup process,

the controller confirming whether or not the information exchanged between the power transmission device and the power receiving device matches with each other,

the information including at least one of standard information and coil information, and

the controller executing a normal power transmission from the power transmission device to the power receiving device.

17. The power receiving control device of claim 16, the controller further comprising:

a command processing section that performs a command process after the setup process, the command process starting the normal power transmission from the power transmission device to the power receiving device.

18. The power receiving control device of claim 17, the command process performed by the command processing section comprising the execution of a command that is confirmed to be available by at least one of the negotiation process and the setup process.

19. The power receiving control device of claim 18, the command executed by the command processing section comprising at least one of:

a command for staring the normal power transmission;

a command for detecting a full charge of a battery included in the load; and

a command for confirming whether or not a recharge of the battery is required.

20. The power receiving control device of claim 16, the negotiation process performed by the negotiation processing section comprising at least one of:

a confirmation process that confirms whether or not information is able to be communicated between the power transmission device and the power receiving device;

a confirmation process that confirms whether or not the communicated information is adequate;

a confirmation process that confirms whether or not the load of the power receiving device is appropriate;

a checking process that checks at least one of standard information and coil information between the power transmission device and the power receiving device; and

a checking process that checks system information of the power transmission device, the information providing a load condition based on system information of the power receiving device.

21. The power receiving control device of claim 16, the setup process performed by the setup processing section comprising at least one of:

a process in which a transmission condition of the power is set based on a result of the negotiation process; and

a process in which information on a corresponding function between the power transmission device and the power receiving device is exchanged.

22. A power receiving device, comprising:

the power receiving control device of claim 16; and

a power receiving section that converts an induced voltage of the secondary coil into a direct current voltage.

23. An electronic apparatus, comprising:

the power receiving device of claim 22; and

a load to which power is supplied by the power receiving device.

24. A method for controlling power transmission in a contactless power transmission system that transmits power by electromagnetically coupling a first coil from a power transmission device to a second coil from a power receiving device to supply the power to a load of the power receiving device, comprising:

performing a negotiation process of contactless power transmission;

performing a setup process of the contactless power transmission based on a result of the negotiation process;

exchanging information between the power transmission device and the power receiving device during the negotiation process and the setup process;

confirming whether or not the information exchanged between the power transmission device power receiving device matches with each other; and

executing a normal power transmission from the power transmission device to the power receiving device after the setup process,

the information including at least one of standard information and coil information.

25. The method for controlling power transmission of claim 24, further comprising:

performing a command process of the contactless power transmission after the setup process to start the normal power transmission by the command process.

26. The method for controlling power transmission of claim 24, the negotiation process comprising at least one of:

a confirmation process that confirms whether or not information is able to be communicated between the power transmission device and the power receiving device;

a confirmation process that confirms whether or not the communicated information is adequate;

a confirmation process that confirms whether or not the load of the power receiving device is appropriate;

a checking process that checks standard information or coil information between the power transmission device and the power receiving device; and

a checking process that checks system information of the power transmission device, the information showing a method for detecting a load condition, with system information of the power receiving device.

27. The method for controlling power transmission of claim 24, the setup process comprising at least one of:

a process in which a transmission condition of the power is set based on a result of the negotiation process; and

a process in which information on a corresponding function between the power transmission device and the power receiving device is exchanged.

28. The method for controlling power transmission claim 24, the command process comprising:

a command that is confirmed to be available by at least one of the negotiation process and the setup process, is issued and/or executed.

29. The method for controlling power transmission of claim 28, the command process further comprising at least one of:

a command for staring the normal power transmission;

a command for detecting a full charge of a battery included in the load; and

a command for confirming whether or not a recharge of the battery is required.

30. A method for controlling power receiving in a contactless power transmission system that transmits power by electromagnetically coupling a first coil from a power transmission device to a second coil from a power receiving device to supply the power to a load of the power receiving device, comprising:

performing a negotiation process of contactless power transmission;

performing a setup process of the contactless power transmission based on a result of the negotiation process;

exchanging information between the power transmission device and the power receiving device during the negotiation process and the setup process;

confirming whether or not the information exchanged between power transmission device and the power receiving device matches with each other; and

starting a supply of power to the load by starting normal power transmission from the power transmission device to the power receiving device after the setup process,

the information including at least one of standard information and coil information.

31. A contactless power transmission system that performs a contactless power transmission, the system comprising:

a power transmission device comprising;

a primary coil that transmits a first data via an electromagnetic coupling, receives a second data via the electromagnetic coupling and transmits the contactless power transmission via the electromagnetic coupling based on the received second data;

a power receiving device comprising;

a secondary coil that receives the first data from the power transmission device via the electromagnetic coupling, transmits the second data to the power transmission device via the electromagnetic coupling and receives the contactless power transmission from the power transmission device via the electromagnetic coupling based on the transmitted second data; and

a controller that controls the power transmission device, the controller including;

a negotiation processing section that controls a negotiation process of contactless power transmission with the power receiving device based on an exchange of the first data and the second data; and

a setup processing section that performs a setup process of the contactless power transmission based on a result of the negotiation process,

the controller exchanging information between the power transmission device and the power receiving device during the negotiation process and the setup process,

the controller confirming whether or not the information exchanged between the power transmission device and the power receiving device matches with each other,

the information including at least one standard information and coil information, and

the controller executing the contactless power transmission from the power transmission device to the receiving device.

32. The contactless power transmission system of claim 31, the power transmission device further comprising:

a power transmission section that generates a first signal on the primary coil having a first frequency to transmit a data value of 1 via the electromagnetic coupling and that generates a second signal on the primary coil having a second frequency to transmit a data value of 0 via the electromagnetic coupling.

33. The contactless power transmission system of claim 32, the power receiving device further comprising:

a frequency detection circuit that detects the first frequency via the secondary coil and the electromagnetic coupling to receive a data value of 1 and that detects the second frequency via the secondary coil and the electromagnetic coupling to receive a data value of 0.

34. The contactless power transmission system of claim 31, the power receiving device further comprising:

a load modulation section that generates a third signal on the secondary coil having a first amplitude to transmit a data value of 1 via the electromagnetic coupling and that generates a fourth signal on the secondary coil having a second amplitude to transmit a data value of 0 via the electromagnetic coupling.

35. The contactless power transmission system of claim 34, the power transmission device further comprising:

a load condition detection circuit that detects the first amplitude via the primary coil and the electromagnetic coupling to receive a data value of 1 and that detects the second amplitude via the primary coil and the electromagnetic coupling to receive a data value of 0.

36. A power transmission control device included in a contactless power transmission system that transmits power by electromagnetically coupling a primary coil from a power transmission device to a secondary coil from a power receiving device to supply the power to a load of the power receiving device, the power transmission control device comprising:

a controller that controls the power transmission device, the controller including;

a negotiation processing section that performs a negotiation process of contactless power transmission;

and a setup processing section that performs a setup process of the contactless power transmission based on a result of the negotiation process,

the controller exchanging information between the power transmission device and the power receiving device during the negotiation process and the setup process,

the controller confirming whether or not the information exchanged between the power transmission device and the power receiving device matches with each other,

the information including safety information, and

the controller executing a normal power transmission from the power transmission device to the power receiving device.