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Method and apparatus for coil integration for uniform wireless charging

A technology of coils and conductive layers, applied in the direction of circuit devices, battery circuit devices, transformers/inductor coils/windings/connections, etc.

Active Publication Date: 2016-11-02
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Wireless charging implementations are especially challenging for devices with large chassis dimensions, such as tablets and laptops

Method used

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  • Method and apparatus for coil integration for uniform wireless charging
  • Method and apparatus for coil integration for uniform wireless charging
  • Method and apparatus for coil integration for uniform wireless charging

Examples

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Embodiment Construction

[0043] Location flexibility and multi-device charging are the distinguishing features of A4WP-based wireless charging systems. Coupling uniformity between PRU and PTU is critical in achieving these two features. For small devices (e.g. wearables / smartphones) where the PRU resonator is close to the size of the entire device, uniform coupling can be achieved by creating a PTU resonator that provides a uniform magnetic field within the charging area.

[0044] However, for large devices such as tablets and notebooks, the PRU coil only covers a part of the device. The equipment chassis and metal components within the equipment modulate the coupling between the PTU and PRU coils. Therefore, the magnetic coupling varies significantly based on the relative position (ie, overlap) of the PTU and PRU. This is true even when the PTU coil provides a substantially uniform magnetic field. Figure 1(a) shows a PTU coil design that provides a generally uniform magnetic field within the coil ...

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PUM

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Abstract

The present disclosure relates to a method and apparatus for coil integration for uniform wireless charging. The present disclosure relates to a method, apparatus, and system for wirelessly charging of a device. In particular, the disclosed embodiments provide an improved charging station for increasing the effective charging area. In one embodiment, the present disclosure relates to a compensation device for a power receiving unit (PRU). The compensation device comprises an electrically conductive layer supporting an aperture aligned with the innermost coil loop of the PRU and a first slot formed in the conductive layer and extending from the aperture to the outer edge of the electrically conductive layer.

Description

technical field [0001] The present disclosure relates to methods, apparatuses and systems for wirelessly charging devices. Specifically, the disclosed embodiments provide improved receiver coil integration techniques to increase coupling uniformity between receivers and charging stations, thereby increasing location flexibility. Background technique [0002] Wireless charging, or inductive charging, uses a magnetic field to transfer energy between two devices. Wireless charging is possible at charging stations. Energy is sent from one device to another by inductive coupling. Inductive coupling is used to charge batteries or operate receiving equipment. The Alliance for Wireless Power (A4WP) was formed to create an industry standard for transferring power from a power transmitting unit (PTU) to a power receiving unit (PRU) via radiation-free, near-field, magnetic resonance. [0003] A4WP defines five classes of PRUs parameterized by the maximum power delivered by the PRU ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/14H01F27/28H02J50/10
CPCH01F27/2804H01F38/14H01F2027/2809H01F2038/146H02J7/025
Inventor 杨松楠贾纳丹·卡塔蒂科尔·纳瑞亚南桑德·C·阿泽优阿玛德·霍什内维斯
Owner INTEL CORP