System for wireless power transmission and reception

• US 9,692,486 B2
• Filed: 08/19/2011
• Issued: 06/27/2017
• Est. Priority Date: 03/08/2011
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Nam Yun, Kwon, Sang Wook, Kim, Dong Zo, Hong, Young Tack
• Primary Examiner(s): Jia, Xin
• Application Number:
  US13/214,006
• Publication Number:
  US 20120231731A1
• Time in Patent Office: 2,139 Days
• Field of Search: 455 411, 455 412, 455157, 45 411, 45 412
• CPC Class Codes: H02J 50/10 using inductive coupling
• CPC Class Codes: H02J 50/12 of the resonant type
• 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: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmitter and receiver, and related methods are provided. In one embodiment, a wireless power receiver may include: a receiving unit configured to receive wireless power from a source resonator; a detecting unit configured to detect a current value, a voltage value, or both of the wireless power; a controller configured to determine whether the detected current value, the detected voltage value, or both have a peak value, in a relation to a load which the wireless power is to be transmitted to; and a communication unit configured to transmit a result of the determination to the source resonator.

Claims

1. A wireless power receiver comprising:

a receiver comprising a target resonator configured to receive wireless power from a source resonator;

a detector configured to detect a current value, a voltage value, or both of the wireless power and detect a requested power;

a controller configured to verify whether an amount of the wireless power corresponding to an amount of the requested power of a load is received and to determine whether the detected current value, the detected voltage value, or both have a peak value based on the verification; and

a communicator configured to transmit a result of the determination to a wireless power transmitter and information associated with whether the amount of the wireless power corresponding to the requested power is received,

wherein the target resonator comprises;

a transmission line comprising a first signal conducting portion, a second signal conducting portion, and a first ground conducting portion corresponding to the first signal conducting portion and the second signal conducting portion;

a first conductor electrically connecting the first signal conducting portion and the first ground conducting portion;

second conductor electrically connecting the second signal conducting portion and the first ground conducting portion; and

capacitor inserted between the first signal conducting portion and the second signal conducting portion, in series with respect to a current flowing through the first signal conducting portion and the second signal conducting portion.

2. The wireless power receiver of claim 1, further comprising:

a rectifier configured to convert the wireless power from an alternating current (AC) signal to a direct current (DC) signal.

3. The wireless power receiver of claim 1, wherein the receiver is configured to receive a wake-up signal from the source resonator, and the detector is configured to detect one or more terminals that are awakened by the wake-up signal, identification information of the awakened terminal, whether the awakened terminal requests charging, or a combination thereof.

4. The wireless power receiver of claim 1, wherein the communicator comprises:

an in-band communicator configured to perform in-band communication between the source resonator and a target resonator; and

an out-band communicator configured to perform out-band communication with the wireless power transmitter, using another communication device.

5. The wireless power receiver of claim 1, wherein the communicator is configured to transmit, to the wireless power transmitter, a value of the received wireless power as information for tracking a resonance frequency, an impedance matching frequency of the wireless power transmitter, or a combination thereof.

6. The wireless power receiver of claim 1, further comprising:

a limiter configured to limit the detected current value, the detected voltage value, or both to have a value in a predetermined range, in the relation with the load.

7. The wireless power receiver of claim 1, further comprising:

a boost regulator configured to boost the detected current value or the detected voltage value to reach a current value or a voltage value requested by the load.

8. The wireless power receiver of claim 1, wherein the receiver is further configured to receive wireless power corresponding to operation based on the result of the determination used at the wireless power transmitter.

9. A method of receiving a wireless power, the method comprising:

receiving, from a source resonator, wireless power using a target resonator;

detecting a current value, a voltage value, or both of the wireless power;

detecting a requested power of a load;

verifying whether an amount of the wireless power corresponding to an amount of the requested power of a load is received;

determining whether the detected current value, the detected voltage value, or both have a peak value based on the verifying; and

transmitting a result of the determination to a wireless power transmitter and information associated with whether the amount of the wireless power corresponding to the requested power is received,

wherein the target resonator comprises;

transmission line comprising a first signal conducting portion, a second signal conducting portion, and a first around conducting portion corresponding to the first signal conducting portion and the second signal conducting portion;

a first conductor electrically connecting the first signal conducting portion and the first ground conducting portion;

a second conductor electrically connecting the second signal conducting portion and the first ground conducting portion; and

a capacitor inserted between the first signal conducting portion and the second signal conducting portion, in series with respect to a current flowing through the first signal conducting portion and the second signal conducting portion.

10. The method of claim 9, further comprising:

converting the wireless power from an alternating current (AC) signal to a direct current (DC) signal.

11. The method of claim 9, wherein the step of transmitting comprises:

transmitting, to the wireless power transmitter, a value of the received wireless power as information for tracking a resonance frequency an impedance matching frequency, or both of the wireless power transmitter.