WIRELESS POWER COMPONENT SELECTION

• US 20130038402A1
• Filed: 08/20/2012
• Published: 02/14/2013
• Est. Priority Date: 07/21/2011
• Status: Abandoned Application

• Current Assignee: WiTricity Corporation
• Original Assignee: WiTricity Corporation
• Inventors: Karalis, Aristeidis, Kesler, Morris P., Campanella, Andrew J., Kurs, Andre B., Hall, Katherine L.
• Application Number:
  US13/589,992
• Publication Number:
  US 20130038402A1
• Time in Patent Office: Days
• US Class Current: 333/32
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/50 using additional energy repeaters between transmitting devices and receiving devices
• CPC Class Codes: H02J 50/90 involving detection or optimisation of position, e.g. alignment

Abstract

A method includes providing a source resonator including a first conductive loop in parallel with a first capacitive element and in series with a first adjustable element the source resonator having a source target impedance, providing a plurality of device resonators each including a conductive loop and having a device target impedance, connecting, for each of the plurality of device resonators, a resistor corresponding to the device target impedance in series with the conductive loop of each of the plurality of device resonators, connecting a network analyzer in series with the first conductive loop and adjusting at least one of the first capacitive element and the first adjustable element until a measured impedance of the source resonator is within a predetermined range of the source target impedance.

Claims

1. A method comprising:

a) providing a source resonator comprising a first conductive loop in parallel with a first capacitive element and in series with a first adjustable element the source resonator having a source target impedance;

b) providing a device resonator comprising a second conductive loop in parallel with a second capacitive element and in series with a second adjustable element the device resonator having a device target impedance;

c) providing a repeater resonator;

d) arranging a position of the repeater resonator substantially in the vicinity of a position of the source resonator and a position of the device resonator;

e) connecting a resistor corresponding to the device target impedance in series with the second conductive loop;

f) connecting a network analyzer in series with the first conductive loop;

g) adjusting at least one of the first capacitive element and the first adjustable element until a measured impedance of the source resonator is within a predetermined range of the source target impedance;

h) connecting a resistor corresponding to the source target impedance in series with the first conductive loop;

i) connecting the network analyzer in series with the second conductive loop; and

j) adjusting at least one of the second capacitive element and the second adjustable element until a measured impedance of the device resonator is within a predetermined range of the device target impedance.

2. The method of claim 1 wherein steps e-g are performed in an alternating iterative fashion with steps h-j.

3. The method of claim 1 wherein at least one of the adjustable elements comprises a capacitor.

4. The method of claim 1 wherein at least one of the adjustable elements comprises an inductor.

5. A method comprising:

providing a source resonator comprising a first conductive loop in parallel with a first capacitive element and in series with a first adjustable element the source resonator having a source target impedance;

providing a plurality of device resonators each comprising a conductive loop and having a device target impedance;

connecting, for each of the plurality of device resonators, a resistor corresponding to the device target impedance in series with the conductive loop of each of the plurality of device resonators;

connecting a network analyzer in series with the first conductive loop; and

adjusting at least one of the first capacitive element and the first adjustable element until a measured impedance of the source resonator is within a predetermined range of the source target impedance.

6. The method of claim 5 wherein the first adjustable element comprises a capacitor.

7. The method of claim 5 wherein the first adjustable element comprises an inductor.

8. A method comprising:

a) providing a source resonator comprising a first conductive loop in parallel with a first capacitive element and in series with a first adjustable element the source resonator having a source target impedance;

b) providing a device resonator comprising a second conductive loop in parallel with a second capacitive element and in series with a second adjustable element the device resonator having a device target impedance;

c) providing a repeater resonator;

d) arranging a position of the resonator substantially in the vicinity of a position of the source resonator and a position of the device resonator;

e) connecting a resistor corresponding to the device target impedance in series with the second conductive loop;

f) adjusting at least one of the first capacitive element and the first adjustable element until an impedance measured in series with the first conductive loop is within a predetermined range of the source target impedance;

g) connecting a resistor corresponding to the source target impedance in series with the first conductive loop; and

h) adjusting at least one at the second capacitive element and the second adjustable element until an impedance measured in series with the second conductive loop is within a predetermined range of the device target impedance.

9. The method of claim 8 wherein steps e-f are performed in an alternating iterative fashion with steps g-h.

10. The method of claim 8 wherein at least one of the adjustable elements comprises a capacitor.

11. The method of claim 8 wherein at least one of the adjustable elements comprises an inductor.