METHOD AND APPARATUS FOR CONTROLLING POWER IN WIRELESS POWER TRANSFER SYSTEM

• US 20180138758A1
• Filed: 11/03/2015
• Published: 05/17/2018
• Est. Priority Date: 11/03/2014
• Status: Active Application

• Current Assignee: GE Hybrid Technologies, LLC
• Original Assignee: Hanrim Postech Co., Ltd.
• Inventors: JUNG, Chun Kil, NOH, Sang Youn
• Application Number:
  US15/522,773
• Publication Number:
  US 20180138758A1
• Time in Patent Office: Days
• 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 50/80 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 7/00036 Charger exchanging data with battery
• CPC Class Codes: H02J 7/00047 with provisions for charging different types of batteries

Abstract

A method and an apparatus for controlling power in a wireless power transfer system are disclosed. A method for controlling power of a main device in a wireless power transfer system comprises the steps of: receiving information necessary for power control from a plurality of peripheral devices; identifying the actual power consumption state of the plurality of peripheral devices on the basis of the information necessary for power control, and determining a reference peripheral device on the basis of the actual power consumption state; and determining output power in consideration of the reference peripheral device.

Claims

1. A method for controlling, by a main device, power in a wireless power transmission system comprising a plurality of peripheral devices wirelessly supplied with power from the main device within power transmission coverage of the main device, the method comprising steps of:

receiving information necessary for power control from the plurality of peripheral devices;

determining a reference peripheral device based on the information necessary for power control; and

determining output power by taking into consideration the reference peripheral device.

2. The method of claim 1, wherein the information necessary for power control comprises at least any one of a “

control error value”

, a “

rectifier output voltage” and

a “

battery or operating circuit input terminal voltage.”

3. The method of claim 2, wherein the main device determines the output power based on the “

control error value”

, the “

rectifier output voltage”

or the “

battery or operating circuit input terminal voltage”

, and determines a peripheral device having a greatest “

control error value”

to be the reference peripheral device or determines a peripheral device having a smallest “

rectifier output voltage”

or “

battery or operating circuit input terminal voltage”

to be the reference peripheral device.

4. The method of claim 1, wherein the information necessary for power control comprises information about an actual amount of received power and instant consumption power of the peripheral device.

5. The method of claim 4, wherein the main device determines a peripheral device having a smallest ratio of the actual amount of received power to the instant consumption power to be the reference peripheral device based on the information about the actual amount of received power and instant consumption power of the peripheral device.

6. The method of claim 1, wherein the information necessary for power control comprises information about a ratio of an actual amount of received power to instant consumption power of the peripheral device.

7. The method of claim 1, wherein:

the information necessary for power control is received in a time division manner based on a time interval allocated to each of the plurality of peripheral devices, and

the main device performs power control in a time division manner based on the information necessary for power control of each of the plurality of peripheral devices.

8. A method for controlling, by a main device, power in a wireless power transmission system comprising a plurality of peripheral devices wirelessly supplied with power from the main device within power transmission coverage of the main device, the method comprising steps of:

receiving information about a current charging level from the plurality of peripheral devices; and

determining a reference peripheral device based on the information about the current charging level and determining output power based on a power control parameter of the reference peripheral device.

9. The method of claim 8, wherein the power control parameter comprises at least any one of a “

control error value”

, a “

rectifier output voltage” and

a “

battery or operating circuit input terminal voltage.”

10. The method of claim 8, wherein the main device determines a peripheral device having a charging state of a predetermined reference or less or a peripheral device having a lowest current charging level to be the reference peripheral device.

11. A power control apparatus of a main device in a wireless power transmission system comprising a plurality of peripheral devices wirelessly supplied with power from the main device, the apparatus comprising:

a communication unit which receives information necessary for power control from the plurality of peripheral devices; and

a control unit which determines a reference peripheral device based on the information necessary for power control and determines output power by taking into consideration the reference peripheral device.

12. The power control apparatus of claim 11, wherein:

the information necessary for power control comprises at least any one of a “

control error value”

, a “

rectifier output voltage” and

a “

battery or operating circuit input terminal voltage”

, and

the control unit determines the output power based on the “

control error value”

, the “

rectifier output voltage”

or the “

battery or operating circuit input terminal voltage”

, and determines a peripheral device having a greatest “

control error value”

to be the reference peripheral device or determines a peripheral device having a smallest “

rectifier output voltage”

or “

battery or operating circuit input terminal voltage”

to be the reference peripheral device.

13. (canceled)

14. (canceled)