Wireless power control method, system, and apparatus utilizing a wakeup signal to prevent standby power consumption

• US 9,191,075 B2
• Filed: 01/18/2013
• Issued: 11/17/2015
• Est. Priority Date: 12/31/2012
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Hanrim Postech Co., Ltd.
• Inventors: Jung, Chun-Kil, Park, Hee-Jeong, Hwang, Byong-Uk
• Primary Examiner(s): Whitmore, Stacy
• Application Number:
  US13/745,336
• Publication Number:
  US 20140184149A1
• Time in Patent Office: 1,033 Days
• Field of Search: 320107-108
• US Class Current: 1/1
• 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 50/90 involving detection or optimisation of position, e.g. alignment
• CPC Class Codes: H02J 7/0049 Detection of fully charged condition
• CPC Class Codes: H04B 5/266 One coil at each side, e.g. with primary and secondary coils
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

Disclosed herein are a wireless power transmission control method in a wireless power transmission system, including receiving awake-up signal from a wireless power receiving apparatus and transmitting a wireless power transmission signal to the wireless power receiving apparatus through a transmission coil of a wireless power transmission apparatus while activating a deactivated power block when the wake-up signal is received; a wireless power transmission apparatus using the same; and a wireless power receiving apparatus using the same.

Claims

1. A wireless power transmission control method in a wireless power transmission system, the method comprising:

entering a power-off mode where both a power block and an inverter block of the wireless power transmission apparatus are turned off;

receiving a wake-up signal from a wireless power receiving apparatus in the power-off mode;

in response to the wake-up signal, activating a deactivated power block; and

transmitting a wireless power transmission signal to the wireless power receiving apparatus through a transmission coil of a wireless power transmission apparatus while activating the deactivated power block, when the wake-up signal is received, to prevent standby power consumption.

2. The wireless power transmission control method of claim 1, wherein the wake-up signal is received through a near field communication module.

3. The wireless power transmission control method of claim 1, further comprising:

receiving a power transmission request signal of the wireless power receiving apparatus,

wherein the transmitting of the wireless power transmission signal is in response to the power transmission request signal.

4. The wireless power transmission control method of claim 3, wherein the power transmission request signal is received through a near field communication module.

5. The wireless power transmission control method of claim 3, wherein the power transmission request signal comprises information describing a resonance frequency, and the transmitting of the wireless power transmission signal comprises matching a frequency of the wireless power transmission signal to the resonance frequency.

6. The wireless power transmission control method of claim 1, further comprising:

determining whether an external object is sensed using an object sensing unit of the wireless power transmission apparatus; and

,

when the external object is sensed and the wake-up signal is not received, operating an alarm module of the wireless power transmission apparatus.

7. The wireless power transmission control method of claim 1, further comprising:

in response to a start signal inputted by a user input unit of the wireless power transmission apparatus, activating a deactivated power block.

8. The wireless power transmission control method of claim 1, further comprising:

receiving a full-charge signal from the wireless power receiving apparatus;

in response to the full-charge signal, ceasing transmission of a wireless power transmission signal and deactivating an activated power block.

9. The wireless power transmission control method of claim 1, further comprising, in response to the wake-up signal, activating a deactivated inverter block.

10. The wireless power transmission control method of claim 8, further comprising, in response to the full-charge signal, deactivating an activated inverter block.

11. A wireless power transmission apparatus, comprising:

a transmission coil configured to transmit a wireless power signal to a wireless power receiving apparatus;

a communication unit configured to receive a wake-up signal from the wireless power receiving apparatus in a power-off mode where both a power block and an inverter block of the wireless power transmission apparatus are turned off;

a power block configured to supply power; and

a transmission control unit configured to activate the power block when the wake-up signal is received through the communication unit, and to transmit the wireless power transmission signal to the wireless power receiving apparatus through the transmission coil while activating a deactivated power block, when the wake-up signal is received, to prevent standby power consumption.

12. The wireless power transmission control apparatus of claim 11, wherein the communication unit comprises a near field communication module.

13. The wireless power transmission control apparatus of claim 11, wherein the communication unit is further configured to receive a power transmission request signal from the wireless power receiving apparatus, and

wherein the transmission control unit transmits the wireless power signal to the wireless power receiving apparatus when the transmission request signal is received through the communication unit.

14. The wireless power transmission control apparatus of claim 13, wherein the power transmission request signal comprises information describing a resonance frequency, and

wherein the transmission control unit is further configured to control the wireless power signal to have a frequency matching the resonance frequency.

15. The wireless power transmission control apparatus of claim 11, further comprising:

an object sensing unit configured to sense an external object; and

an alarm module,

wherein the transmission control unit is further configured to operate the alarm module of the wireless power transmission apparatus when the external object is sensed by the object sensing unit and the wake-up signal is not received.

16. The wireless power transmission control apparatus of claim 11, further comprising a user input unit configured to input a start signal,

wherein the transmission control unit is further configured to activate the power block when the start signal of the user input unit is inputted.

17. The wireless power transmission control apparatus of claim 11, further comprising:

an inverter block configured to switch a DC power supplied by the power block to an AC power,

wherein the transmission control unit is further configured to activate the inverter block when the wake-up signal is received through the communication unit.

18. The wireless power transmission control apparatus of claim 11, wherein the communication unit is further configured to receive a full-charge signal from the wireless power receiving apparatus, and

wherein the transmission control unit is further configured to deactivate the power block when a full-charge signal is received through the communication unit.

19. The wireless power transmission control apparatus of claim 14, further comprising an impedance matching unit,

wherein the transmission control unit controls the frequency of the wireless power signal using the impedance matching unit.

20. A wireless power receiving apparatus, comprising:

a receiving coil configured to receive a wireless power transmission signal;

an impedance matching unit configured to resonate between the receiving coil and a transmission coil of a wireless power transmission apparatus;

a communication module configured to transmit a wake-up signal to the wireless power transmission apparatus in a power-off mode where both a power block and an inverter block of the wireless power transmission apparatus are turned off;

a power block configured to receive a power signal from the impedance matching unit and to output a DC power;

a power control block configured to control the power block;

a battery configured to be charged with the DC power from the power block; and

a receiving control unit configured to control the communication module to transmit the wake-up signal to the wireless power transmission apparatus, and to control the power control block to charge the battery when a wireless power signal is received from the wireless power transmission apparatus.