WIRELESS ENERGY TRANSFER WITH HIGH-Q CAPACITIVELY LOADED CONDUCTING LOOPS

• US 20110043046A1
• Filed: 12/23/2009
• Published: 02/24/2011
• Est. Priority Date: 07/12/2005
• Status: Active Grant

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Karalis, Aristeidis, Soljacic, Marin, Joannopoulos, John D.
• Granted Patent: US 8,400,023 B2
• Time in Patent Office: Days
• US Class Current: 307/104
• 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: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H01Q 9/04 Resonant antennas
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/40 using two or more transmitting or receiving devices H02J50/50 takes precedence
• CPC Class Codes: H02M 1/0064 Magnetic structures combining different functions, e.g. storage, filtering or transformation
• CPC Class Codes: H02M 3/01 Resonant DC/DC converters
• CPC Class Codes: H04B 5/0037 for power transfer
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer
• 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 embodiments of a source resonant structure and a device resonant structure, the structures may be capable of performing wireless near-field energy transfer when separated a distance D from each other, where the absolute value of the difference of said angular frequencies w₁ and w₂ may be smaller than the magnitude of the coupling rate, k, and where at least one of the resonant structures comprises a high-Q capacitively-loaded conducting-wire loop.

Claims

1. A system, comprising:

a source resonant structure and a device resonant structure, the structures capable of performing wireless near-field energy transfer when separated a distance D from each other,

wherein the absolute value of the difference of said angular frequencies ω

₁ and ω

₂ is smaller than the magnitude of the coupling rate, κ

, and

wherein at least one of the resonant structures comprises a high-Q capacitively-loaded conducting-wire loop.

2. A method, comprising:

providing a source resonant structure and a device resonant structure, the structures capable of performing wireless near-field energy transfer when separated a distance D from each other,

wherein the absolute value of the difference of said angular frequencies ω

₁ and ω

₂ is smaller than the magnitude of the coupling rate, κ

, and

wherein at least one of the resonant structures comprises a high-Q capacitively-loaded conducting-wire loop.