POWER TRANSMISSION CONTROL DEVICE, POWER TRANSMITTING DEVICE, NON-CONTACT POWER TRANSMITTING SYSTEM, AND ELECTRONIC INSTRUMENT

• US 20090174364A1
• Filed: 01/08/2009
• Published: 07/09/2009
• Est. Priority Date: 01/09/2008
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: KAMIJO, Takahiro, KAMIYAMA, Masayuki, ONISHI, Kota, SHIOZAKI, Nobutaka, SOGABE, Haruhiko, HASEGAWA, Minoru
• Granted Patent: US 8,188,709 B2
• Time in Patent Office: Days
• 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 7/00045 Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
• CPC Class Codes: H02J 7/0044 specially adapted for holding portable devices containing batteries H02J7/0045 takes precedence

Abstract

A power transmission control device used for a non-contact power transmission system includes an operation mode switching terminal that receives an operation mode switch control signal that switches a mode between an automatic mode and a switch mode, a power transmitting device starting normal power transmission in the automatic mode after installation of a power-receiving-side instrument that includes a power receiving device in an area in which power transmitted via non-contact power transmission can be received has been automatically detected, the normal power transmission supplying power to a load of the power-receiving-side instrument, and the power transmitting device starting the normal power transmission in the switch mode after an operation trigger switch has been turned ON, an operation trigger terminal that receives an operation trigger signal that occurs due to an operation of the operation trigger switch, and a power-transmitting-side control circuit that controls power transmission to the power receiving device and changes an operation mode of the power transmitting device based on the operation mode switch control signal.

Claims

1. A power transmission control device provided in a power transmitting device of a non-contact power transmission system, the non-contact power transmission system performing non-contact power transmission from the power transmitting device to a power receiving device via a primary coil and a secondary coil that are electromagnetically coupled, the power transmission control device comprising:

an operation mode switch terminal that receives an operation mode switch control signal, the operation mode switch control signal switching an automatic mode to a switch mode, the power transmitting device starting normal power transmission in the automatic mode after installation of a power-receiving-side instrument that includes the power receiving device in an area in which power transmitted via non-contact power transmission can be received has been automatically detected, the power transmitting device supplying power to a load of the power-receiving-side instrument at the normal power transmission, and the power transmitting device starting the normal power transmission in the switch mode after an operation trigger switch has been turned ON;

an operation trigger terminal that receives an operation trigger signal, the operation trigger signal occuring due to an operation of the operation trigger switch; and

a power-transmitting-side control circuit that controls power transmission to the power receiving device and changes an operation mode of the power transmitting device based on the operation mode switch control signal.

2. The power transmission control device as defined in claim 1,

the power-transmitting-side control circuit causing the power transmitting device to perform intermittent temporary power transmission when the automatic mode has been selected based on the operation mode switch control signal, detecting a response from the power receiving device that has received the intermittent temporary power transmission to detect the installation of the power-receiving-side instrument, causing the power transmitting device to continuously perform the normal power transmission to the power receiving device when the installation of the power-receiving-side instrument has been detected, and causing the power transmitting device to continuously perform the intermittent temporary power transmission when the installation of the power-receiving-side instrument has not been detected;

and the power-transmitting-side control circuit causing the power transmitting device to repeatedly start and stop power transmission to the power receiving device each time the operation trigger signal is input to the operation trigger terminal when the switch mode has been selected based on the operation mode switch control signal.

3. The power transmission control device as defined in claim 2,

the power-transmitting-side control circuit performing an ID authentication process before the normal power transmission regardless of whether the automatic mode or the switch mode has been selected to determine whether or not the power-receiving-side instrument has adaptability to the non-contact power transmission system, and causing the power transmitting device to perform the normal power transmission when the ID authentication process has been completed successfully.

4. The non-contact power transmission system as defined in claim 3,

the power-transmitting-side control circuit causing the power transmitting device to perform the intermittent temporary power transmission when the automatic mode has been selected based on the operation mode switch control signal, detecting the installation of the power-receiving-side instrument depending on whether or not ID authentication information has been received from the power receiving device within a given period of time from a start time of the intermittently temporary power transmission, causing the power transmitting device to perform the normal power transmission to the power receiving device when the installation of the power-receiving-side instrument has been detected on condition that the ID authentication process has been completed successfully, and causing the power transmitting device to continuously perform the intermittent temporary power transmission when the ID authentication information has not been received from the power receiving device within the given period of time from the start time of the temporary power transmission or the ID authentication process has not been completed successfully.

5. The power transmission control device as defined in claim 4,

the power-transmitting-side control circuit causing the power transmitting device to stop the normal power transmission and perform power transmission for removal detection after full-charging and power transmission for recharge necessity determination after full-charging when the power-transmitting-side control circuit has detected a full-charge notification from the power receiving device during the normal power transmission, causing the power transmitting device to perform the intermittent temporary power transmission when removal of the power receiving device has been detected based on a signal transmitted from the power receiving device that has received the power transmission for removal detection after full-charging, and causing the power transmitting device to resume the normal power transmission when the power-transmitting-side control circuit has determined that recharging is necessary based on a signal transmitted from the power receiving device that has received the power transmission for recharge necessity determination after full-charging.

6. The power transmission control device as defined in claim 3,

the power-transmitting-side control circuit causing the power transmitting device to perform the intermittent temporary power transmission that enables the ID authentication process to the power receiving device when the operation trigger switch provided in a power-transmitting-side instrument has been turned ON when the switch mode has been selected based on the operation mode switch control signal, performing the ID authentication process based on ID authentication information when the ID authentication information has been received from the power receiving device that has received the intermittent temporary power transmission within a given period of time from a start time of the intermittent temporary power transmission, causing the power transmitting device to perform the normal power transmission to the power receiving device when the ID authentication process has been completed successfully, and causing the power transmitting device to stop the temporary power transmission and return to an initial state when the ID authentication information has not been received from the power receiving device within the given period of time from the start time of the temporary power transmission or the ID authentication process has not been completed successfully, the power transmitting device waiting for the operation trigger switch to be turned ON in the initial state without performing the intermittent temporary power transmission.

7. The power transmission control device as defined in claim 6,

the power-transmitting-side control circuit causing the power transmitting device to stop the normal power transmission and return to the initial state when a full-charge notification has been received from the power receiving device after the normal power transmission has started.

8. The power transmission control device as defined in claim 1,

the power-transmitting-side control circuit determining the presence or absence of a foreign object based on a change of waveform of an induced voltage signal of the primary coil, and causing the power transmitting device to stop the normal power transmission when a foreign object has been detected during the normal power transmission.

9. The power transmission control device as defined in claim 1,

the power-transmitting-side control circuit detecting the presence or absence of a takeover state, the takeover state being a state that the power transmitting device continuously performing the normal power transmission while erroneously recognizing a foreign object placed between the primary coil and the secondary coil as the power-receiving-side instrument, and causing the power transmitting device to stop the normal power transmission when the takeover state has been detected during the normal power transmission.

10. The power transmission control device as defined in claim 9,

the power-transmitting-side control circuit detecting an intermittent change in a power-receiving-side load, and detecting the presence or absence of the takeover state based on the presence or absence of an intermittent change in the power-receiving-side load during the normal power transmission.

12. A power transmitting device comprising:

the power transmission control device as defined in claim 1; and

a power transmitting section that generates an alternating-current voltage and supplies the alternating-current voltage to the primary coil.

13. An electronic instrument comprising:

the power transmitting device as defined in claim 12;

an operation mode switch that generates the operation mode switch control signal; and

the operation trigger switch.

14. The electronic instrument as defined in claim 13,

the operation mode switch being provided in an area in which a user can operate the operation mode switch.

15. The electronic instrument as defined in claim 13,

the operation mode switch being provided in an area in which a user cannot operate the operation mode switch.

16. The electronic instrument as defined in claim 13, further comprising:

a plurality of operation mode switches.

11. A power transmission control device provided in a power transmitting device that transmits power to a power receiving device, the power transmission control device comprising:

a first terminal that receives a first signal;

a second terminal that receives a second signal; and

a power-transmitting-side control circuit that controls the power transmitting device,

the power-transmission-side control circuit causing the power transmitting device to operate in a first operation mode or a second operation mode based on the first signal, the power transmitting device set in the first operation mode performing power transmission that supplies power to a load electrically connected to the power receiving device after installation of the power receiving device in a power reception area has been automatically detected, and the power transmitting device set in the second operation mode performing the power transmission after the second signal has been input to the second terminal.

17. A non-contact power transmission system performing non-contact power transmission, the system comprising:

a power transmitting device; and

a power receiving device,

the power transmitting device including a power-transmitting-side control device that controls power transmission to the power receiving device based on an induced voltage in a primary coil, the primary coil being electromagnetically coupled to a secondary coil,

the power-transmitting-side control device including;

an operation mode switch terminal that receives an operation mode switch control signal, the operation mode switch control signal switching an automatic mode to a switch mode, the power transmitting device set in the automatic mode automatically detecting installation of a power-receiving-side instrument that includes the power receiving device, performing an ID authentication process, and starting normal power transmission, and the power transmitting device set in the switch mode starting power transmission when an operation trigger switch has been turned ON, performing the ID authentication process, and starting the normal power transmission;

an operation trigger terminal that receives an operation trigger signal, the operation trigger signal occuring due to an operation of the operation trigger switch; and

a power-transmitting-side control circuit that controls power transmission to the power receiving device and changes an operation mode of the power transmitting device based on the operation mode switch control signal,

the power receiving device including a power supply control section that controls power supply to a load, and a power reception control device that controls the power receiving device,

the power-transmitting-side control circuit of the power transmitting device causing the power transmitting device to perform intermittent temporary power transmission when the automatic mode has been selected based on the operation mode switch control signal, and detecting installation of a power-receiving-side instrument that includes the power receiving device depending on whether or not ID authentication information has been received from the power receiving device that has received the intermittent temporary power transmission within a given period of time from a start time of the intermittent temporary power transmission, causing the power transmitting device to perform the normal power transmission to the power receiving device when the installation of the power-receiving-side instrument has been detected on condition that the ID authentication process has been completed successfully, causing the power transmitting device to perform the intermittent temporary power transmission when the ID authentication information has not been received from the power receiving device within the given period of time from the start time of the intermittent temporary power transmission or the ID authentication process has not been completed successfully; and

the power-transmitting-side control circuit causing the power transmitting device to perform the intermittent temporary power transmission that enables the ID authentication process to the power receiving device when a switch provided in a power-transmitting-side instrument has been turned ON when the switch mode has been selected based on the operation mode switch control signal, performing the ID authentication process based on the ID authentication information when the ID authentication information has been received from the power receiving device that has received the intermittent temporary power transmission within a given period of time from a start time of the intermittent temporary power transmission, causing the power transmitting device to perform the normal power transmission to the power receiving device after the ID authentication process has been completed successfully, and causing the power transmitting device to return to an initial state when the ID authentication information has not been received from the power receiving device within the given period of time from the start time of the intermittent temporary power transmission or the ID authentication process has not been completed successfully, the power transmitting device waiting for the switch to be turned ON in the initial state without performing the intermittent temporary power transmission.

18. The non-contact power transmission system as defined in claim 17,

when the automatic mode has been selected based on the operation mode switch control signal, the power-transmitting-side control circuit causing the power transmitting device to stop the normal power transmission and perform power transmission for removal detection after full-charging and power transmission for recharge necessity determination after full-charging when the power-transmitting side control circuit has detected a full-charge notification transmitted from the power receiving device during the normal power transmission, causing the power transmitting device to perform the intermittent temporary power transmission when removal of the power receiving device has been detected based on a signal transmitted from the power receiving device that has received the power transmission for removal detection after full-charging, and causing the power transmitting device to resume the normal power transmission when the power-transmitting-side control circuit has determined that recharging is necessary based on a signal transmitted from the power receiving device that has received the power transmission for recharge necessity determination after full-charging.