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High efficiency and power transfer in wireless power magnetic resonators

A technology of wireless power and power, applied in antennas, inductors, transformers, etc.

Inactive Publication Date: 2010-09-29
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Example describes operation and actual efficiency

Method used

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  • High efficiency and power transfer in wireless power magnetic resonators
  • High efficiency and power transfer in wireless power magnetic resonators
  • High efficiency and power transfer in wireless power magnetic resonators

Examples

Experimental program
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Embodiment Construction

[0015] figure 1 A basic example is shown in . The power transmitter assembly 100 receives power from a source (eg, AC plug 102). The frequency generator 104 is used to couple energy to the antenna 110 (here, a resonant antenna). Antenna 110 includes an inductive loop 111 that is inductively coupled to a high-Q resonant antenna portion 112 . The resonant antenna comprises N number of coil loops 113, each loop having a radius R A . A capacitor 114 (shown here as a variable capacitor) is connected in series with the coil 113, forming a resonant tank. In the described embodiment, the capacitor is a completely separate structure from the coil, but in some embodiments the self-capacitance of the wires forming the coil may form capacitance 114 .

[0016] Frequency generator 104 may preferably be tuned to antenna 110, and also selected for FCC compliance.

[0017] This embodiment uses a multi-directional antenna. 115 shows the energy output in all directions. Antenna 100 is no...

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PUM

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Abstract

Techniques for wireless power transmission at levels that induce high power transfer and / or high efficiency of coupling.

Description

[0001] This application claims priority to Provisional Application No. 60 / 973,166, filed September 17, 2007, the entire disclosure of which is incorporated herein by reference. Background technique [0002] There is a need to transfer electrical energy from a source to a destination without the use of wires to guide electromagnetic fields. Difficulties with previous attempts have been low efficiency and inappropriate amounts of power delivered. [0003] Wireless power transfer is described in our prior and provisional applications including, but not limited to, Serial No. 12, filed January 22, 2008, entitled "Wireless Apparatus and Methods." / 018,069, the entire disclosure of which is incorporated herein by reference. [0004] The system may use transmit and receive antennas, which are preferably resonant antennas that generally resonate within, for example, 5%-10% resonance, 15% resonance or 20% resonance. The antenna is preferably of small size to allow it to fit into a mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00
CPCH02J5/005H01Q7/00H02J17/00H01Q1/2225H02J50/27H02J50/23H02J50/05H02J50/12H02J50/40H04B5/79H01Q9/065
Inventor 汉斯彼得·威德默奈杰尔·P·库克卢卡斯·西贝尔
Owner QUALCOMM INC