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Charging coil system for a drop-in target device such as a toothbrush

A target device, charger technology, applied in the direction of exchanging data chargers, circuits, inductors, etc., can solve problems such as alignment difficulties

Active Publication Date: 2014-08-27
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alignment difficulties arise because the secondary coil will typically be angled relative to the primary coil when positioned in a cup-shaped container charger rather than a traditional charger base where the target device fits relatively closely

Method used

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  • Charging coil system for a drop-in target device such as a toothbrush
  • Charging coil system for a drop-in target device such as a toothbrush
  • Charging coil system for a drop-in target device such as a toothbrush

Examples

Experimental program
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Embodiment Construction

[0011] figure 1 with figure 2 A prior art system 10 is shown having a primary coil 14 positioned in a base cup 12 . The primary coil is connected to a conventional power supply via a power line 13 and a frequency conversion system (not shown) if required. Positioned in container 12 for charging is target device 16 . The target device may eg be an electric toothbrush comprising a secondary coil 18 at its base. figure 1 shows the magnetic field of the primary coil in elevation, while figure 2 Shows the primary coil magnetic field viewed from the top view. exist figure 1 with figure 2 In the arrangement of , the target device 16 is placed in a cup-shaped container 12 that is shaped to also serve as a cup for the user's drinking water or other liquid, such as mouthwash. With this charging cup, there is no need for a separate glass. The functions of charger and drinking glass are realized in one unit.

[0012] In a typical charging operation, there is energy transfer be...

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PUM

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Abstract

A system and method for charging at least one target device (29) having a secondary coil (27) positionable in a charging receptacle (25) having a primary coil (23) connected to a source of electrical power, wherein the secondary coil of the target device is out of precise alignment with the primary coil when the target device is positioned in the receptacle. A plurality of steering coils (22-22) are arranged around the primary coil. A control circuit (24) changes the magnetic field phase pattern of the steering coils relative to the phase of magnetic field of the primary coil in a selected sequence until the maximum power transfer between the primary coil and the secondary coil is determined. Charging of the target device is continued with the maximum power transfer steering coil phase pattern.

Description

technical field [0001] The present invention relates generally to a charging system for a target device, such as an electric toothbrush, and more particularly to a specific charging system for a combination of a target device and a cup charger into which the target device is positioned for charging. Background technique [0002] Many target devices, such as electric toothbrushes and others, include an inductive charging system that works with a charging base assembly having a primary coil and a target device having a secondary coil. These systems typically require that the primary and secondary coils in the charging base and the target device be closely aligned, such as lined up in registry, respectively, to enable efficient charging and protect the charging interface from interference. "Drop in" charger systems allow the user to simply drop the target device into a container, such as a drinking glass, but the system is inefficient because of the lack of tight alignment. Ty...

Claims

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Application Information

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IPC IPC(8): H02J7/02
CPCH02J5/005H01F38/14H02J7/025H02J50/90H02J50/50H02J7/0044H02J7/00712H02J7/00034H01F21/02H01F21/08H01F21/04H01F21/06H02J50/10H02J50/12
Inventor T·J·塞尔斯
Owner KONINKLJIJKE PHILIPS NV