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Electromagnetic shielding device for wireless power transfer system

A technology of electromagnetic shielding and wireless charging, applied in circuit devices, preventing/reducing unwanted electric/magnetic influences, transformer/inductance components, etc., can solve problems such as low efficiency of wireless power transmission

Active Publication Date: 2021-01-08
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This unexpected voltage can lead to inefficient wireless power transfer

Method used

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  • Electromagnetic shielding device for wireless power transfer system
  • Electromagnetic shielding device for wireless power transfer system
  • Electromagnetic shielding device for wireless power transfer system

Examples

Experimental program
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Effect test

Embodiment Construction

[0026] During wireless power transfer in a wireless charging system, various electrical interactions can occur between a transmitter coil and a receiver coil in a wireless charging system. Some of the electrical interactions are intended interactions between the transmitter and receiver coils, while others are unintended interactions that can lead to inefficient power transfer and create problems in electronic devices. For example, figure 1 is a simplified diagram illustrating the electrical interaction between the transmitter coil 102 and the receiver coil 104 of the exemplary wireless charging system 100 during wireless power transfer. The transmitter coil 102 may be disposed within a wireless charging device, such as a wireless charging pad, and the receiver coil 104 may be disposed within a consumer electronic device such as a smart phone, smart watch, tablet, laptop, or the like. The electronic device may rest on the wireless charging device at interface 112 to enable po...

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Abstract

The present invention is entitled "Electromagnetic Shielding Apparatus for Wireless Power Transmission System". Embodiments describe an electromagnetic shielding device for a wireless charging system. The wireless charging system includes a transmitter coil configured to generate magnetic flux; a receiver coil positioned coaxially with the transmitter coil to receive the generated magnetic flux, wherein a distance between the transmitter coil and the receiver coil is The electrical interaction between generates an electric field; the transmitter shield, which is positioned between the transmitter coil and the receiver coil to intercept some of the electric field away from the transmitter coil and to allow magnetic flux to pass through the transmitter shield and a receiver shield positioned between the transmitter shield and the receiver coil to intercept some of the electric field away from the receiver coil and to allow magnetic flux to pass through the receiver shield.

Description

[0001] Cross references to related patent applications [0002] This application claims U.S. Nonprovisional Patent Application No. 15 / 701,224 filed September 11, 2017 and U.S. Nonprovisional Patent Application No. 15 / 701,237 filed September 11, 2017 (which claims U.S. Provisional Patent Application No. 62 / 399,082 filed on August 7, 2017, U.S. Provisional Patent Application No. 62 / 542,210 filed on August 7, 2017, U.S. Provisional Patent Application No. 62 / 459,149 filed on February 15, 2017, and 2017 priority of US Provisional Patent Application No. 62 / 542,206, filed August 7, the disclosures of which are hereby incorporated by reference in their entirety for all purposes. technical field [0003] The present application relates generally to wireless charging devices, and more particularly to electromagnetic shielding devices for wireless power transfer systems. Background technique [0004] Electronic devices (eg, mobile phones, media players, electronic watches, etc.) opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F38/14H01F27/36H02J50/70
CPCH01F38/14H02J50/70H02J50/10H01F27/36H01F27/361H02J50/402H01F27/2823
Inventor S·艾卡耶姆B·R·加尔巴斯C·S·格拉哈姆K·R·F·拉松
Owner APPLE INC
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