Enhanced inductive power and data transmission using hyper resonance

• US 9,294,154 B2
• Filed: 03/12/2014
• Issued: 03/22/2016
• Est. Priority Date: 03/12/2013
• Status: Active Grant

• Current Assignee: Georgia Tech Research Corporation (University System of Georgia)
• Original Assignee: Georgia Tech Research Corporation (University System of Georgia)
• Inventors: Ghovanloo, Maysam, Ahn, Dukju, Kiani, Mehdi
• Primary Examiner(s): Le, Nhan
• Application Number:
  US14/207,199
• Publication Number:
  US 20140273835A1
• Time in Patent Office: 741 Days
• Field of Search: 455/41.1, 455/77, 455/78, 455/127.1, 455/127.5, 455/550.1
• US Class Current: 1/1
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A method of wirelessly transmitting power or data is disclosed. The method may include the step of providing a transmitter including a driver coil and a first transmitter resonator coil. The driver coil may have a driver coil resonance frequency, and the first transmitter coil may have a first transmitter resonator coil resonance frequency. The method may further include the step of providing a receiver including a load coil having a load coil resonance frequency. Furthermore, the method may include tuning the first transmitter coil resonance frequency to be higher than both of the driver coil resonance frequency and the load coil resonance frequency.

Claims

1. A method of wirelessly transmitting power or data, the method comprising:

providing a transmitter comprising a driver coil having a driver coil resonance frequency, and a first transmitter resonator coil having a first transmitter resonator coil resonance frequency;

providing a receiver comprising a load coil having a load coil resonance frequency;

tuning the first transmitter resonator coil resonance frequency to be higher than one or more of the driver coil resonance frequency and the load coil resonance frequency;

selecting the first transmitter resonator coil resonance frequency based on;

Q-factors of the driver coil, the first transmitter resonator coil, and the load coil;

a first coupling coefficient between the driver coil and the load coil;

a second coupling coefficient between the first transmitter resonator coil and the load coil; and

a third coupling coefficient between the driver coil and the first transmitter resonator coil.

2. The method of claim 1, further comprising:

tuning the driver coil and the load coil such that the driver coil resonance frequency is substantially equal to the load coil resonance frequency.

3. The method of claim 1, further comprising:

providing a second transmitter resonator coil having a second transmitter resonator coil resonance frequency.

4. The method of claim 3, further comprising:

selecting the first and second transmitter resonator coil resonance frequencies based on;

Q-factors of the driver coil, the first transmitter resonator coil, and the load coil;

the first coupling coefficient between the driver coil and the load coil;

the second coupling coefficient between the first transmitter resonator coil and the load coil;

the third coupling coefficient between the driver coil and the first transmitter resonator coil;

a fourth coupling coefficient between the driver coil and the second transmitter resonator coil;

a fifth coupling coefficient between the first transmitter resonator coil and the second transmitter resonator coil; and

a sixth coupling coefficient between the second transmitter resonator coil and the load coil.

5. The method of claim 1, wherein the step of tuning the first transmitter resonator coil resonance frequency to be higher than one or more of the driver coil resonance frequency and the load coil resonance frequency further comprises tuning the first transmitter resonator coil such that the first transmitter resonator coil resonance frequency is less than approximately 3 times the load coil resonance frequency.

6. The method of claim 1, further comprising:

tuning the driver coil and the load coil such that the driver coil resonance frequency is substantially equal to the load coil resonance frequency.

7. The method of claim 1, wherein the step of tuning the first transmitter resonator coil resonance frequency to be higher than one or more of the driver coil resonance frequency and the load coil resonance frequency further comprises tuning the first transmitter resonator coil such that the first transmitter resonator coil resonance frequency that is less than approximately 3 times the load coil resonance frequency.

8. An inductive power transmission system comprising:

a transmitter comprising a driver coil having a driver coil resonance frequency and a first transmitter resonator coil having a first transmitter resonator coil resonance frequency;

a receiver comprising a load coil having a load coil resonance frequency;

wherein the first transmitter resonator coil resonance frequency is selected based on;

Q-factors of the driver coil, the first transmitter resonator coil, and the load coil;

a first coupling coefficient between the driver coil and the load coil;

a second coupling coefficient between the first transmitter resonator coil and the load coil; and

a third coupling coefficient between the driver coil and the first transmitter resonator coil;

wherein the first transmitter coil resonance frequency is higher than both of the driver coil resonance frequency and the load coil resonance frequency; and

wherein the driver coil resonance frequency is substantially equal to the load coil resonance frequency.

9. The system of claim 8 wherein a ratio of the first transmitter coil resonance frequency to the driver coil resonance frequency is between approximately 1 and 3.

10. The system of claim 8 wherein the transmitter further comprises a second transmitter resonator coil having a second resonator coil resonance frequency.

11. The system of claim 10 wherein the second transmitter coil resonance frequency is higher than both of the driver coil resonance frequency and the load coil resonance frequency.

12. A method of wirelessly transmitting power or data, the method comprising:

providing a transmitter comprising a driver coil having a driver coil resonance frequency, and a first transmitter resonator coil having a first transmitter resonator coil resonance frequency;

providing a receiver comprising a load coil having a load coil resonance frequency;

tuning the first transmitter resonator coil resonance frequency to be higher than one or more of the driver coil resonance frequency and the load coil resonance frequency;

providing a second transmitter resonator coil having a second transmitter resonator coil resonance frequency;

selecting the first and second transmitter resonator coil resonance frequencies based on;

Q-factors of the driver coil, the first transmitter resonator coil, and the load coil;

a first coupling coefficient between the driver coil and the load coil;

a second coupling coefficient between the first transmitter resonator coil and the load coil;

a third coupling coefficient between the driver coil and the first transmitter resonator coil;

a fourth coupling coefficient between the driver coil and the second transmitter resonator coil;

a fifth coupling coefficient between the first transmitter resonator coil and the second transmitter resonator coil; and

a sixth coupling coefficient between the second transmitter resonator coil and the load coil.