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Magnetic circuit for a non-contact charging device, power supply device, power receiving device, and non-contact charging device

A non-contact charging and power supply device technology, applied in the direction of circuit devices, battery circuit devices, circuits, etc., can solve the problems of insufficient magnetic force, insufficient access, and reduced magnetic permeability of the coil support, and achieve simple structure and excellent practicability , The effect of suppressing the reduction of power transmission efficiency

Active Publication Date: 2012-10-17
PROTERIAL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The magnetic permeability of the magnetically saturated coil support part is greatly reduced, so the function as a yoke cannot be fully obtained, and the power transmission efficiency is reduced
In addition, it is difficult to produce a thin L-shaped permanent magnet with a rare earth magnet, and it is easy to be broken by hand.
In addition, when a thin L-shaped permanent magnet is manufactured using, for example, a rubber magnet, the magnetic force is insufficient and sufficient positioning accuracy cannot be obtained.

Method used

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  • Magnetic circuit for a non-contact charging device, power supply device, power receiving device, and non-contact charging device
  • Magnetic circuit for a non-contact charging device, power supply device, power receiving device, and non-contact charging device
  • Magnetic circuit for a non-contact charging device, power supply device, power receiving device, and non-contact charging device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] pass figure 1 With the structure shown, a non-contact charging device having the following dimensions was produced, and magnetic field analysis was performed.

[0075] (1) Power supply device

[0076] The primary coil 201 and the annular plate-shaped coil support 212 are bonded concentrically, and the magnetic attraction device 211 shown in FIG. figure 1 The power supply device 20 is shown. The primary coil 201 is composed of a copper wire with a winding number of 20 turns and a wire diameter of 0.5 mm, and has an inner diameter of 15 mm, an outer diameter of 35 mm, and a thickness of 1 mm. The annular plate-shaped coil holder 212 has an inner diameter of 10 mm and an outer diameter of 40 mm, and two thin Fe-based nanocrystalline alloy ribbons ("Fainmet FT1" manufactured by Hitachi Metals, Ltd.) with a thickness of 20 μm are laminated, and the thickness is 50 μm on both sides. Made of polyethylene terephthalate (PET) film. The magnetic attraction device 211 is forme...

Embodiment 2

[0082] Figure 8 In the shown non-contact charging device, the relationship between the outer diameter of the magnetic attraction device 311 and the magnetic flux density in the coil holder 312 is obtained by magnetic field analysis. The primary coil 201 is composed of 16 turns of copper wire with a wire diameter of 0.5 mm, with an inner diameter of 17 mm, an outer diameter of 36 mm, and a thickness of 1.0 mm. The secondary coil 301 is composed of a copper wire with 8 turns and a wire diameter of 0.5 mm. The inner diameter is 22mm, the outer diameter is 32mm and the thickness is 0.5mm. The annular plate-shaped coil holder 212 having an inner diameter of 10 mm, an outer diameter of 40 mm, and a thickness of 1.0 mm is formed of Mn—Zn-based ferrite. An annular plate-shaped coil holder 312 with an inner diameter of 10 mm and an outer diameter of 35 mm is formed by laminating two thin Fe-based nanocrystalline alloy ribbons of 20 μm in thickness ("Fainmet FT1" manufactured by Hitac...

Embodiment 3

[0088] Figure 10 In the shown non-contact charging device, the relationship between the width of the magnetic gap between the magnetic attraction device and the coil holder and the power transmission efficiency of the non-contact charging device was obtained.

[0089] (1) Power supply device

[0090] A coil holder 212 made of a ferrite disk having an outer diameter of 40 mm and a thickness of 1 mm was fixed to a resin substrate 218 . On the coil holder 212 , as the primary coil 201 , a planar coil composed of copper wire with a wire diameter of 0.5 mm and covered with a resin with an outer diameter of 40 mm, an inner diameter of 20 mm, and a thickness of 0.5 mm is superimposed concentrically. As the magnetic attraction device 211 , a disk-shaped permanent magnet (surface magnetic flux density=150 mT) having an outer diameter of 15 mm, a thickness of 1.5 mm, and a thickness of 0.5 mm was arranged concentrically with the primary coil 201 . The front surface of the magnetic at...

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Abstract

Disclosed is a magnetic circuit for non-contact charging devices which is provided with a coil, a coil yoke positioned on the rear side of the coil, and a magnetic absorption means positioned in the hole of the coil yoke but separated by a magnetic gap in an in-plane direction and / or the thickness direction.

Description

technical field [0001] The present invention relates to a non-contact charging device capable of reliably positioning a secondary coil of a power receiving device with respect to a primary coil of a power feeding device without lowering power transmission efficiency, a magnetic circuit used therefor, a power feeding device, and a power receiving device device. Background technique [0002] In recent years, high performance and high functionality of small information communication devices such as mobile phones have progressed, and continuous use over a long period of time has also been required for web terminals and music players. In these small information communication devices and electronic devices, secondary batteries such as lithium ion batteries are used as power sources. [0003] The charging method of the secondary battery includes a contact charging method and a non-contact charging method. The contact charging method is a method in which the electrodes of the powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/14H02J7/00H02J17/00
CPCH01F2003/103H01F3/10H02M3/33553H01F38/14
Inventor 板桥弘光森山义幸
Owner PROTERIAL LTD