Energy transferring system and method thereof

• US 7,994,880 B2
• Filed: 06/19/2008
• Issued: 08/09/2011
• Est. Priority Date: 12/14/2007
• Status: Expired due to Fees

• Current Assignee: Darfon Electronics Corporation
• Original Assignee: Darfon Electronics Corporation
• Inventors: Lin, Chih-Lung, Chen, Chih-Jung, Jou, Zuei-Chown
• Primary Examiner(s): Fureman; Jared J
• Assistant Examiner(s): CAVALLARI, DANIEL J
• Application Number:
  US12/141,972
• Publication Number:
  US 20090153273A1
• Time in Patent Office: 1,146 Days
• Field of Search: 307/104, 333/219
• US Class Current: 333/219
• CPC Class Codes: G08C 17/04 using magnetically coupled devices

Abstract

An energy transferring system including a source-side resonator, an intermediate resonant module, and a device-side resonator is provided. The three resonators substantially have the same resonant frequency for generating resonance. The energy on the source-side resonator is coupled to the intermediate resonant module, such that non-radiative energy transfer is performed between the source-side resonator and the intermediate resonant module. The energy coupled to the intermediate resonant module is further coupled to the device-side resonator, such that non-radiative energy transfer is performed between the intermediate resonant module and the device-side resonator to achieve energy transfer between the source-side resonator and the device-side resonator. The coupling coefficient between the intermediate resonant module and its two adjacent resonators is larger than the coupling coefficient between the source-side resonator and the device-side resonator. The invention has the advantages of high transmission efficiency, small volume, low cost.

Claims

1. An energy transferring system, comprising:

a source-side resonator for receiving an energy, wherein the source-side resonator has a first resonant frequency;

an intermediate resonant module having a second resonant frequency substantially the same with the first resonant frequency, wherein the energy on the source-side resonator is coupled to the intermediate resonant module, such that non-radiative energy transfer is performed between the source-side resonator and the intermediate resonant module, and the coupling between the source-side resonator and the intermediate resonant module corresponds to a first coupling coefficient; and

a device-side resonator having a third resonant frequency substantially the same with the second resonant frequency, wherein the energy coupled to the intermediate resonant module is further coupled to the device-side resonator, such that non-radiative energy transfer is performed between the intermediate resonant module and the device-side resonator, and the coupling between the intermediate resonant module and the device-side resonator corresponds to a second coupling coefficient;

wherein the coupling between the source-side resonator and the device-side resonator corresponds to a third coupling coefficient;

wherein the first coupling coefficient is larger than the third coupling coefficient, and the second coupling coefficient is larger than the third coupling coefficient.

2. The energy transferring system according to claim 1, wherein magnetic energy transfer is performed between the source-side resonator and the intermediate resonant module.

3. The energy transferring system according to claim 1, wherein power energy transfer is performed between the source-side resonator and the intermediate resonant module.

4. The energy transferring system according to claim 1, further comprising:

a power circuit for generating a power signal to provide the energy;

a first impedance matching circuit for receiving a power signal provided by the power circuit and outputting the power signal;

a first coupling circuit for receiving the power signal outputted from the first impedance matching circuit, wherein the first coupling circuit and the source-side resonator are mutually coupled to each other, such that energy transfer is performed between the first coupling circuit and the source-side resonator to transfer the energy to the source-side resonator.

5. The energy transferring system according to claim 1, further comprising:

a first coupling circuit mutually coupled with the device-side resonator for outputting the energy received by the device-side resonator;

a first impedance matching circuit for receiving the energy outputted from the first coupling circuit and outputting the energy; and

a rectification circuit for receiving the energy outputted from the first impedance matching circuit to obtain a rectification signal.

6. The energy transferring system according to claim 1, wherein the intermediate resonant module has at least one intermediate resonator.

7. The energy transferring system according to claim 6, wherein the intermediate resonator is a conductive coil structure with parasitic capacitance.

8. The energy transferring system according to claim 6, wherein the intermediate resonator has a dielectric disk structure.

9. The energy transferring system according to claim 6, wherein the intermediate resonator has a metallic sphere structure.

10. The energy transferring system according to claim 6, wherein the intermediate resonator has a metallodielectric sphere structure.

11. The energy transferring system according to claim 6, wherein the intermediate resonator has a plasmonic sphere structure.

12. The energy transferring system according to claim 6, wherein the intermediate resonator has a polaritonic sphere structure.

13. The energy transferring system according to claim 1, wherein the source-side resonator has a solenoid inductance structure.

14. The energy transferring system according to claim 1, wherein the device-side resonator has a solenoid inductance structure.

15. An energy transferring method, comprising:

providing a source-side resonator to receive an energy;

providing an intermediate resonant module, wherein the energy on the source-side resonator is coupled to the intermediate resonant module, such that non-radiative energy transfer is performed between the source-side resonator and the intermediate resonant module, and the coupling between the source-side resonator and the intermediate resonant module corresponds to a first coupling coefficient; and

providing the energy for coupling a device-side resonator to the intermediate resonant module, wherein the energy is further coupled to the device-side resonator, such that non-radiative energy transfer is performed between the intermediate resonant module and the device-side resonator, and the coupling between the intermediate resonant module and the device-side resonator corresponds to a second coupling coefficient, wherein;

the coupling between the source-side resonator and the device-side resonator corresponds to a third coupling coefficient; and

the first coupling coefficient is larger than the third coupling coefficient, and the second coupling coefficient is larger than the third coupling coefficient.

16. The energy transferring method according to claim 15, wherein the source-side resonator, the intermediate resonant module and the device-side resonator respectively have a first resonant frequency, a second resonant frequency and a third resonant frequency, and the first resonant frequency, the second resonant frequency and the third resonant frequency are substantially the same.