WIRELESS POWER COMPONENT SELECTION

• US 20130020878A1
• Filed: 07/23/2012
• Published: 01/24/2013
• Est. Priority Date: 07/21/2011
• Status: Abandoned Application

• Current Assignee: WiTricity Corporation
• Original Assignee: WiTricity Corporation
• Inventors: Karalis, Aristeidis, Kesler, Morris P., Hall, Katherine L.
• Application Number:
  US13/555,807
• Publication Number:
  US 20130020878A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: B60L 53/122 Circuits or methods for driving the primary coil, e.g. supplying electric power to the coil
• CPC Class Codes: B60L 53/124 Detection or removal of foreign bodies
• CPC Class Codes: B60L 53/126 Methods for pairing a vehicle and a charging station, e.g. establishing a one-to-one relation between a wireless power transmitter and a wireless power receiver
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: Y02P 80/30 Reducing waste in manufacturing processes; Calculations of released waste quantities
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

Described herein are improved configurations for a wireless power transfer. The parameters of components of resonators in a system are calculated and adjusted. Some adjustments are performed using a temporary matching resistor chosen to simulate the loading of at least one additional resonator.

Claims

1. A method comprising:

providing a wireless power module comprising at least one magnetic resonator and a power source, each of the at least one magnetic resonator having an inductive loop;

determining a target impedance for the at least one magnetic resonator;

connecting a temporary matching resistor in series with the inductive loop of the at least one magnetic resonator;

connecting at least one additional electrical component to the temporary matching resistor to form combined components; and

adjusting a component value of at least one of the at least one additional electrical component until an actual impedance of the combined components is within a predetermined range of the target impedance.

2. The method of claim 1, wherein adjusting the component value comprises adjusting the component value of at least one of the at least one additional electrical components until the actual impedance of the combined components is within approximately 20% of the target impedance.

3. The method of claim 1, wherein adjusting the component value comprises adjusting the component value of at least one of the at least one additional electrical components until the actual impedance of the combined components is within approximately 10% of the target impedance.

4. The method of claim 1, further comprising choosing the temporary matching resistor to simulate the loading of at least one additional resonator.

5. The method of claim 1, wherein the temporary matching resistor is connected to the resonator inductive loop using fuses.

6. The method of claim 1, wherein the temporary matching resistor is connected to the inductive loop of the at least one resonator using jumpers.

7. The method of claim 1, further comprising removing the matching temporary matching resistor and shorting the connection.

8. The method of claim 1, further comprising shorting each of two terminals of the temporary matching resistor.

9. The method of claim 1, further comprising attaching the inductive loop of at least one magnetic resonator and at least one of the at least one additional electrical components to a power source.

10. The method of claim 9, where the power source comprises a full-bridge amplifier.

11. The method of claim 9, where the power source comprises a half-bridge amplifier.

12. The method of claim 1, further comprising attaching the inductive loop of at least one magnetic resonator and at least one of the at least one additional electrical components to a power load.

13. The method of claim 12, where the power load comprises a full-bridge rectifier.

14. The method of claim 12, where the power load comprises a half-bridge rectifier.

15. A method comprising:

providing a resonator having an inductive loop and at least one circuit element;

determining a target impedance of the resonator;

connecting a temporary resistor in series with the inductive loop, the temporary resistor chosen to simulate the loading of at least one additional resonator; and

adjusting the at least one circuit element until an actual impedance of the resonator is substantially equivalent to the target impedance.

16. The method of claim 15, wherein adjusting the at least one circuit element comprises adjusting the at least one circuit element until the actual impedance of the resonator is within approximately 20% of the target impedance.

17. The method of claim 15, wherein adjusting the at least one circuit element comprises adjusting the at least one circuit element until the actual impedance of the resonator is within approximately 10% of the target impedance.