POWER TRANSMITTING APPARATUS, POWER RECEIVING APPARATUS, POWER TRANSMISSION METHOD, PROGRAM, AND POWER TRANSMISSION SYSTEM

• US 20090271047A1
• Filed: 04/23/2009
• Published: 10/29/2009
• Est. Priority Date: 04/28/2008
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: WAKAMATSU, Masataka
• Granted Patent: US 8,577,479 B2
• Time in Patent Office: Days
• US Class Current: 700/295
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06Q 50/06 Energy or water supply
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: H02J 5/005 with inductive power transfer for charging H02J7/025
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

There is provided a power transmitting apparatus including a power transmission side communication unit for communicating with a power receiving apparatus, a power transmission unit for transmitting power to the power receiving apparatus in a non-contact manner, a transmission power information deriving unit for increasing discretely a first transmission power to transmit from the power transmission unit to the power receiving apparatus, and deriving information related to power transmission for determining a second transmission power corresponding to power desired by the power receiving apparatus based on reception of received power information transmitted from the power receiving apparatus at the power transmission side communication unit, indicating that a received power level meet a predetermined level, and a transmission power determining unit for determining the second transmission power to transmit to the power receiving apparatus based on information related to power transmission derived by the transmission power information deriving unit.

Claims

1. A power transmitting apparatus comprising:

a power transmission side communication unit for communicating with a power receiving apparatus for receiving transmitted power;

a power transmission unit for transmitting power to the power receiving apparatus in a non-contact manner;

a transmission power information deriving unit for increasing discretely a first transmission power to transmit from the power transmission unit to the power receiving apparatus, and deriving information related to power transmission for determining a second transmission power corresponding to power desired by the power receiving apparatus based on reception of received power information transmitted from the power receiving apparatus at the power transmission side communication unit, indicating that a received power level meet a predetermined level; and

a transmission power determining unit for determining the second transmission power to transmit to the power receiving apparatus based on information related to power transmission derived by the transmission power information deriving unit.

2. The power transmitting apparatus according to claim 1, wherein the transmission power information deriving unit derives a coupling coefficient with the power receiving apparatus as information related to power transmission.

3. The power transmitting apparatus according to claim 2, wherein

the power transmission side communication unit further receives first power consumption information indicating a power consumption desired to detect that the received power level meet the predetermined level in the power receiving apparatus;

and

the transmission power information deriving unit derives the coupling coefficient based on the first transmission power of when the power transmission side communication unit receives the received power information, and the first power consumption information.

4. The power transmitting apparatus according to claim 3, wherein

the power transmission side communication unit further receives a second power consumption indicating a power consumption desired for the power receiving apparatus to operate;

and

the transmission power determining unit determines the second transmission power based on the coupling coefficient derived by the transmission power information deriving unit and the second power consumption information.

5. The power transmitting apparatus according to claim 1, wherein

the transmission power information deriving unit transmits a start notification to start transmission of the first transmission power to the power transmission side communication unit, and transmits the first transmission power from the power transmission unit after the transmission of the start notification.

6. A power receiving apparatus comprising:

a power receiving side communication unit for communicating with a power transmitting apparatus for transmitting power;

a power reception unit for receiving power transmitted from the power transmitting apparatus in a non-contact manner;

a received power level detection unit for outputting a detection result corresponding to the received power level based on a first transmission power transmitted from the power transmitting apparatus; and

a control unit for transmitting received power information indicating that the received power level meet a predetermined level from the power receiving side communication unit based on the detection result of the received power level detection unit.

7. The power receiving apparatus according to claim 6, wherein the received power level detection unit includes,

a light emitting element which light emission amount changes according to a current amount corresponding to the power received by the power reception unit, and

a photoelectric transducer for outputting a detection signal corresponding to the light emission amount of the light emitting element.

8. The power receiving apparatus according to claim 7, wherein the received power level detection unit emits light by the light emission of the light emitting element to outside.

9. The power receiving apparatus according to claim 6, further comprising

a switching unit for selectively transmitting the power received by the power reception unit to the received power level detection unit in response to a control signal transmitted from the control unit, wherein

the control unit transmits the control signal to the switching unit when the power receiving side communication unit receives a start notification to start transmission of the first transmission power transmitted from the power transmitting apparatus.

10. The power receiving apparatus according to claim 6, wherein

the control unit transmits a first power consumption indicating a power consumption desired to detect that the received power level meet the predetermined level, and a second power consumption indicating a power consumption necessary for operation from the power receiving side communication unit when the power receiving side communication unit receives the start notification to start transmission of the first transmission power transmitted from the power transmitting apparatus.

11. A power transmission method comprising the steps of:

transmitting a first transmission power to a power receiving apparatus for receiving a transmitted power, the first transmission power increased discretely;

receiving received power information indicating that a received power level transmitted from the power receiving apparatus meet a predetermined level based on a reception of the first transmission power;

deriving information related to power transmission for determining a second transmission power corresponding to a power desired by the power receiving apparatus based on the reception of the received power information;

determining the second transmission power to transmit to the power receiving apparatus based on the information related to power transmission; and

transmitting the determined second transmission power to the power receiving apparatus.

12. A program for causing a computer to execute the steps of:

transmitting a first transmission power to a power receiving apparatus for receiving a transmitted power, the first transmission power increased discretely;

receiving received power information indicating that a received power level transmitted from the power receiving apparatus meet a predetermined level based on a reception of the first transmission power;

deriving information related to power transmission for determining a second transmission power corresponding to a power desired by the power receiving apparatus based on the reception of the received power information;

determining the second transmission power to transmit to the power receiving apparatus based on the information related to power transmission; and

transmitting the determined second transmission power to the power receiving apparatus.

13. A power transmission system comprising:

a power transmitting apparatus for transmitting power; and

a power receiving apparatus for receiving power transmitted by the power transmitting apparatus, wherein

the power transmitting apparatus includes,

a power transmission side communication unit for communicating with the power receiving apparatus,

a power transmission unit for transmitting power to the power receiving apparatus in a non-contact manner,

a transmission power information deriving unit for increasing discretely a first transmission power to transmit from the power transmission unit to the power receiving apparatus, and deriving information related to power transmission for determining a second transmission power corresponding to power desired by the power receiving apparatus based on reception of received power information transmitted from the power receiving apparatus at the power transmission side communication unit, indicating that a received power level meet a predetermined level, and

a transmission power determining unit for determining the second transmission power to transmit to the power receiving apparatus based on information related to power transmission derived by the transmission power information deriving unit; and

the power receiving apparatus includes,

a power receiving side communication unit for communicating with the power transmitting apparatus,

a power reception unit for receiving power transmitted from the power transmitting apparatus in a non-contact manner,

a received power level detection unit for outputting a detection result corresponding to the received power level based on a first transmission power transmitted from the power transmitting apparatus, and

a control unit for transmitting the received power information from the power receiving side communication unit based on the detection result of the received power level detection unit.