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Power Feeding Coil Unit And Wireless Power Transmission Device

A technology of power transmission coil and power reception coil, which is applied to battery circuit devices, circuit devices, coils, etc., can solve the problems of power transmission efficiency decline and power transmission efficiency reduction, and achieve the effect of suppressing the decline of power transmission efficiency.

Active Publication Date: 2015-06-03
TDK CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the technique disclosed in Patent Document 1 has a problem in that the magnetic flux generated by the coil for power transmission intersects with the coil for noise canceling, so that even the magnetic flux that originally contributes to power transmission may be canceled out. As a result, reducing the efficiency of power transmission
[0006] Therefore, the present invention is made in view of the above-mentioned technical problem, and its object is to provide a power transmission coil unit and a wireless power transmission device, which can reduce unnecessary leakage magnetic fields formed at places far away from the power transmission coil, and suppress Decrease in Power Transmission Efficiency

Method used

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  • Power Feeding Coil Unit And Wireless Power Transmission Device
  • Power Feeding Coil Unit And Wireless Power Transmission Device
  • Power Feeding Coil Unit And Wireless Power Transmission Device

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no. 1 Embodiment approach

[0041] First, refer to figure 1 and figure 2 The configuration of the wireless power transmission device S1 according to the first embodiment of the present invention will be described. figure 1 It is a system configuration diagram showing the wireless power transmission device according to the first embodiment of the present invention together with loads. figure 2 It is a cross-sectional view showing the power transmission coil unit and the power reception coil according to the first embodiment of the present invention.

[0042] Such as figure 1 As shown, the wireless power transmission device S1 includes a wireless power transmitting device Ut1 and a wireless power receiving device Ur.

[0043] The wireless power transmission device Ut1 includes a power supply PW, an inverter INV, and a power transmission coil unit Ltul. The power supply PW supplies DC power to an inverter INV described later. The power supply PW is not particularly limited as long as it outputs DC po...

no. 2 Embodiment approach

[0069] Below, refer to Figure 4 as well as Figure 5 The arrangement of the wireless power transmission device S2 according to the second embodiment of the present invention will be described. Figure 4 It is a system configuration diagram showing a wireless power transmission device according to a second embodiment of the present invention together with a load. Figure 5 It is a cross-sectional view showing a power transmission coil unit and a power reception coil according to a second embodiment of the present invention.

[0070] Such as Figure 4 As shown, the wireless power transmission device S2 includes a wireless power transmitting device Ut2 and a wireless power receiving device Ur.

[0071]The wireless power transmission device Ut2 includes a power supply PW, an inverter INV, and a power transmission coil unit Ltu2. The arrangement of the power supply PW and the inverter INV is the same as that of the wireless power transmission device S1 according to the first e...

no. 3 Embodiment approach

[0088] Below, refer to Figure 7 as well as Figure 8The arrangement of the wireless power transmission device S3 according to the third embodiment of the present invention will be described. Figure 7 It is a system configuration diagram showing a wireless power transmission device according to a third embodiment of the present invention together with a load. Figure 8 It is a cross-sectional view showing a power transmission coil unit and a power reception coil according to a third embodiment of the present invention.

[0089] Such as Figure 7 As shown, the wireless power transmission device S3 includes a wireless power transmitting device Ut3 and a wireless power receiving device Ur.

[0090] The wireless power transmission device Ut3 includes a power supply PW, an inverter INV, and a power transmission coil unit Ltu3. The arrangement of the power supply PW and the inverter INV is the same as that of the wireless power transmission device S1 according to the first embo...

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Abstract

A power feeding coil unit includes a power feeding coil, and an auxiliary coil. The auxiliary coil is arranged not to interlink with a magnetic flux that interlinks with a power receiving coil that is arranged to face the power feeding coil during power feeding. An axial direction of the auxiliary coil is nonparallel to an opposing direction of the power feeding coil and the power receiving coil. A direction of circulation of a magnetic flux generated by the auxiliary coil is opposite to a direction of circulation of a magnetic flux generated by the power feeding coil.

Description

technical field [0001] The present invention relates to a power transmission coil unit and a wireless power transmission device for wirelessly transmitting power. Background technique [0002] In recent years, in order to transmit power without mechanical contact such as cables, the wireless power transmission technology that utilizes the electromagnetic induction between the primary (power transmission) coil and the secondary (power reception) coil facing each other has attracted people's attention. attention, and there is an increasing demand for the development of technologies capable of power transmission with high efficiency and low loss. [0003] When electric power is transmitted wirelessly, an unnecessary leakage magnetic field formed around the power transmission coil due to the leakage magnetic flux of the power transmission coil has become a concern. For example, when the wireless power transmission technology is applied to a charging device in a power electronic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J17/00H01F27/38H01F38/14
CPCH02J5/005H02J7/025H01F27/38H02J7/0042Y02T90/12Y02T90/14B60L2270/147H01F38/14H02J50/10B60L53/126B60L53/122Y02T10/7072Y02T10/70H02J50/402H02J50/005H02J50/70H01F27/346H01F27/28H01F27/24H01F27/42H01F38/00H01F37/00H01F5/00
Inventor 千代宪隆鸭野武志福泽成敏松浦利典西山哲哉
Owner TDK CORP
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