Dielectric materials for power transfer system

• US 9,881,732 B2
• Filed: 07/27/2012
• Issued: 01/30/2018
• Est. Priority Date: 07/28/2011
• Status: Active Grant

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Krishna, Kalaga Murali, Matani, Lohit
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Ortiz, Elim
• Application Number:
  US13/560,259
• Publication Number:
  US 20140028105A1
• Time in Patent Office: 2,013 Days
• Field of Search: 307104
• CPC Class Codes: C04B 2235/3206 Magnesium oxides or oxide-forming salts thereof
• CPC Class Codes: C04B 2235/3213 Strontium oxides or oxide-forming salts thereof
• CPC Class Codes: C04B 2235/3232 Titanium oxides or titanates, e.g. rutile or anatase
• CPC Class Codes: C04B 2235/3234 Titanates, not containing zirconia
• CPC Class Codes: C04B 2235/3236 Alkaline earth titanates
• CPC Class Codes: C04B 2235/3239 Vanadium oxides, vanadates or oxide forming salts thereof, e.g. magnesium vanadate
• CPC Class Codes: C04B 2235/3281 Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
• CPC Class Codes: C04B 2235/3298 Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
• CPC Class Codes: C04B 2235/3445 Magnesium silicates, e.g. forsterite
• CPC Class Codes: C04B 2235/80 Phases present in the sintered or melt-cast ceramic products other than the main phase
• CPC Class Codes: C04B 2235/85 Intergranular or grain boundary phases
• CPC Class Codes: C04B 35/20 rich in magnesium oxide , e.g. forsterite C04B35/195 takes precedence
• CPC Class Codes: C04B 35/46 based on titanium oxides or titanates containing also zirconium or hafnium oxides, zirconates or hafnates C04B35/49
• CPC Class Codes: C04B 35/465 based on alkaline earth metal titanates
• CPC Class Codes: C04B 35/47 based on strontium titanates
• CPC Class Codes: H01B 3/12 ceramics
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 7/00 Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
• 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

Abstract

A contactless power transfer system is proposed. The power transfer system comprises a field-focusing element comprising a dielectric material. The dielectric material includes an oxide material including (Mg_1-xSr_x)_yTiO_(2+y), wherein x can vary between the value of zero and 1 such that 0≦x≦1, and y can be 0, 1, or 2. A power transfer system further including a first coil coupled to a power source and a second coil coupled to a load is disclosed. In this system, the field-focusing element including the dielectric material is disposed between the first coil and the second coil.

Claims

1. A power transfer system comprising:

a first coil coupled to a power source;

a second coil coupled to a load; and

a field-focusing element disposed between the first coil and the second coil and comprising a dielectric material and two open ends, wherein the dielectric material comprises an oxide material comprising (Mg_1-xSr_x)_yTiO_(2+y), and y=0, 1, or 2, and wherein the field-focusing element is configured to develop a standing wave current distribution and focus a magnetic field onto the second coil, wherein the field-focusing element comprises multiple sets of resonators, each set of resonators configured to be excited to a different phase to facilitate focusing the magnetic field in a desired direction.

2. The power transfer system of claim 1, wherein the field-focusing element comprises a plurality of resonators arranged in an array, wherein the sets of resonators are configured to enhance the magnetic field in the direction of the second coil.

3. The power transfer system of claim 1, wherein the field-focusing element comprises a single loop.

4. The power transfer system of claim 1, wherein the field-focusing element comprises a spiral structure.

5. The power transfer system of claim 1, wherein the field-focusing element comprises a dielectric cavity resonator.

6. The power transfer system of claim 1, wherein the field focusing element is closer to the first coil than the second coil.

7. The power transfer system of claim 1, wherein the field focusing element comprises a film coating on a metallic surface.

8. The power transfer system of claim 2, wherein a resonator of the plurality of resonators is embedded in the dielectric material.