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Systems and methods for measuring power and impedance in wireless power charging systems

A wireless power transmission and current technology, applied in the direction of measuring resistance/reactance/impedance, measuring electric power, measuring electric variables, etc., can solve the problems of power transmission unit measuring power and impedance, etc.

Inactive Publication Date: 2017-02-22
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional power delivery units may not be configured to measure power and impedance with sufficient speed and accuracy to properly detect non-compliant objects

Method used

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  • Systems and methods for measuring power and impedance in wireless power charging systems
  • Systems and methods for measuring power and impedance in wireless power charging systems
  • Systems and methods for measuring power and impedance in wireless power charging systems

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Embodiment Construction

[0016] The detailed description, which follows in conjunction with the accompanying drawings, is intended as a description of certain implementations of the invention and is not intended to represent the only implementations in which the invention may be practiced. The term "exemplary" is used throughout this description to mean "serving as an example, instance, or illustration" and is not necessarily to be construed as preferred or advantageous over other exemplary implementations. The detailed description includes specific details for the purpose of providing a thorough understanding of the disclosed embodiments. In some instances, devices are shown in block diagram form.

[0017] Transferring power wirelessly may refer to transferring any form of energy associated with electric, magnetic, electromagnetic fields, etc., from a transmitter to a receiver without the use of physical electrical conductors (eg, power may be transferred through space itself). Power output into a w...

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PUM

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Abstract

A wireless power transmitter may generate a magnetic field via a transmit antenna to induce voltage in a receive antenna of a wireless power receiver to power the unit and / or charge the receiver's battery. An apparatus for measuring wireless power transfer at an operating frequency between the transmitter and the receiver is provided. The apparatus comprises a first clock configured to generate a first clock signal at a first clock frequency that is higher than the operating frequency of the wireless power transfer. The apparatus further comprises a controller configured to operate based on a second clock signal, the first clock frequency higher than a second clock frequency of the second clock signal. The controller is further configured to measure an amount of wireless power transfer based on the first clock signal.

Description

technical field [0001] The described techniques relate generally to wireless power. More specifically, the present disclosure relates to systems and methods for measuring power and impedance in wireless power charging systems. Background technique [0002] A wireless power system may include a power transmitting unit (eg, a charging device) and one or more power receiving units (eg, cell phone, laptop, etc.) to be charged. The power receiving unit may be configured to stop receiving power from the power transfer unit once charged. However, non-compliant objects present within the charging area of ​​the power transfer unit may continue to receive power indefinitely. This situation presents a safety hazard as non-compliant objects may dissipate the power they receive as heat, causing damage or personal injury. [0003] The power transfer unit may be configured to detect the presence of the non-compliant object based on the impedance shift caused by the non-compliant object....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J50/00H02J50/12G01R21/00G01R27/02
CPCH02J7/025G01R21/00G01R27/02H02J50/20H02J50/12H02J50/005H04B5/73H04B5/79H04B17/11H04B17/21H04L7/0332H02J50/90H02J7/00
Inventor A·纳贾塔里F·卡罗博兰特R·茨恩
Owner QUALCOMM INC