METHOD FOR CONTROLLING POWER IN WIRELESS POWER TRANSMISSION ASSEMBLY AND WIRELESS POWER ASSEMBLY THEREOF

• US 20120242276A1
• Filed: 03/23/2012
• Published: 09/27/2012
• Est. Priority Date: 03/24/2011
• Status: Active Grant

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Hanrim Postech Co., Ltd.
• Inventors: JUNG, Chun-Kil, Kuk, Yoon-Sang
• Granted Patent: US 10,224,761 B2
• Time in Patent Office: Days
• US Class Current: 320/103
• CPC Class Codes: H02J 50/005 Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting or receiving devices
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 50/60 responsive to the presence of foreign objects, e.g. detection of living beings
• CPC Class Codes: H02J 50/70 involving the reduction of electric, magnetic or electromagnetic leakage fields
• 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 7/007 Regulation of charging or discharging current or voltage
• CPC Class Codes: H02J 7/04 Regulation of charging current or voltage

Abstract

A power control method for a wireless power transmission assembly, and the wireless power transmission assembly. The method includes: outputting a direct current voltage to a wireless power transmission apparatus, the direct current voltage generated from an alternating current power source in an adaptor; and changing the level of the direct current voltage in the adaptor based on a voltage change communication signal if the wireless power transmission apparatus transmits the voltage change communication signal to the adaptor.

Claims

1. A method for controlling a power in a wireless power transmission assembly, the method comprising:

outputting a direct current voltage to a wireless power transmission apparatus, the direct current voltage generated from an alternating current power source in an adaptor; and

changing a level of the direct current voltage in the adaptor based on a voltage change communication signal if the wireless power transmission apparatus transmits the voltage change communication signal to the adaptor.

2. The method of claim 1, wherein the adaptor and the wireless power transmission apparatus are connected by a plus line, a ground line, and a communication line, and the changing of the level of the direct current voltage in the adaptor based on the voltage change communication signal if the wireless power transmission apparatus transmits the voltage change communication signal to the adaptor, comprises:

changing the level of the direct current voltage in the adaptor based on an amplitude modulation signal or a serial communication signal, the amplitude modulation signal or the serial communication signal being transmitted through the communication line.

3. The method of claim 2, wherein the voltage change communication signal comprises at least one of a power up signal and a power down signal based on a charging state signal from a wireless power receiving apparatus.

4. The method of claim 3, wherein the wireless power transmission apparatus comprises a plurality of transmission coils, and the method further comprises:

detecting a wireless power receiving apparatus through any one of the transmission coils; and

transmitting the voltage change communication signal through the transmission coil where the wireless power receiving apparatus is detected.

5. The method of claim 1, wherein the adaptor and the wireless power transmission apparatus are connected by a plus line and a ground line, and the changing of the level of the direct current voltage in the adaptor based on the voltage change communication signal if the wireless power transmission apparatus transmits the voltage change communication signal to the adaptor, comprises:

transmitting a voltage up signal or a voltage down signal through the plus line using DC modulation.

6. The method of claim 1, wherein the changing of the level of the direct current voltage in the adaptor based on the voltage change communication signal if the wireless power transmission apparatus transmits the voltage change communication signal to the adaptor, comprises;

changing a level of the direct current voltage by adjusting an offset voltage of the adaptor.

7. A wireless power transmission assembly, comprising:

an adaptor which changes an alternating current power source to a direct current voltage and to output the direct current voltage; and

a wireless power transmission apparatus which transmits a wireless power signal using the direct current voltage outputted from the adaptor, the wireless power transmission apparatus comprising;

a transmission controller which transmits a voltage change communication signal to the adaptor, wherein the adaptor changes the level of the direct current voltage based on the voltage change communication signal if the wireless power transmission apparatus transmits the voltage change communication signal.

8. The assembly of claim 7, wherein the adaptor and the wireless power transmission apparatus are connected by a plus line, a ground line, and a communication line;

and the transmission controller transmits the voltage change communication signal in the form of an amplitude modulation signal or a serial communication signal transmitted through the communication line.

9. The assembly of claim 7, wherein the adaptor comprises:

a communication controller to receive the voltage change communication signal; and

an output voltage controller to control the direct voltage in response to the voltage change communication signal.

10. The assembly of claim 9, wherein the voltage change communication signal comprises at least one of a power up signal and a power down signal based on a charging state signal from a wireless power receiving apparatus.

11. The assembly of claim 7, wherein the wireless power transmission apparatus comprises a plurality of transmission coils, and the transmission controller detects a wireless power receiving apparatus by an exchange of signals through any one of the transmission coils, and transmits the voltage change communication signal through the transmission coil where the wireless power receiving apparatus is detected.

12. The assembly of claim 11, wherein the transmission controller detects the wireless power receiving apparatus through the load modulation of the first transmission coil and the second transmission coil.

13. The assembly of claim 8, wherein the adaptor and the wireless power transmission apparatus are connected by a plus line and a ground line, and the transmission controller transmits a voltage up signal or a voltage down signal through the plus line using DC modulation.

14. The assembly of claim 7, wherein the transmission controller changes the level of the direct current voltage by adjusting an offset voltage of the adaptor.

15. The assembly of claim 7, further comprising a wireless power receiving apparatus comprising:

a reception coil to receive the wireless power signal and in response generate an induced power when in a charging position of the wireless power transmission apparatus;

a rectifier to rectify the induced power;

a battery; and

a battery cell module to charge the battery using the rectified induced power.

16. The assembly of claim 15, wherein:

the wireless power transmission apparatus further comprises a transmission coil to transmit the wireless power signal to the reception coil;

the transmission controller sends an ID call signal through the transmission coil in response to detection by the transmission coil of an object at the charging position, and the wireless power receiving apparatus responds to the ID call signal by sending an ID response signal through the reception coil to the transmission coil to identify the wireless power receiving apparatus to the wireless power transmission apparatus.