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Coil device

A technology of coil device and coil layer, which is applied in the direction of coil, circuit device, transformer/inductor coil/winding/connection, etc., can solve the problem of power efficiency drop, and achieve the effect of suppressing the generation of Joule heat.

Active Publication Date: 2018-06-08
IHI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If Joule heat is generated, power efficiency will decrease

Method used

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Experimental program
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no. 1 approach 〕

[0031] The power transmission coil device of the first embodiment and a non-contact power supply system including the power transmission coil device will be described. Such as figure 1 As shown, the contactless power supply system 1 includes a power transmitting coil device 2 and a power receiving coil device 3 . The non-contact power supply system 1 supplies electric power from the power transmission coil device 2 to the power reception coil device 3 in a non-contact manner. The power transmission coil device 2 and the power reception coil device 3 are arranged so as to be separated in the vertical direction (opposed direction). The power transmission coil device 2 is installed on a road surface R such as a parking lot, for example. The power receiving coil device 3 is mounted on, for example, an electric vehicle (mobile body) EV. The contactless power supply system 1 is configured to supply electric power to an electric vehicle EV arriving at a parking lot or the like by ...

no. 2 approach 〕

[0071] Next, the power transmission coil device 2 of the second embodiment will be described.

[0072] In the description of the first embodiment, when calculating the total inductance (LD), it is assumed that the first inductance ( L1 ) of the first helical coil 11 is equal to the second inductance ( L2 ) of the second helical coil. However, even when the first helical coil 11 and the second helical coil 12 have the same physical structure and electrical structure, the first inductance ( L1 ) and the second inductance ( L2 ) may not be exactly the same. For example, it is a case where the first helical coil 11 and the second helical coil 12 are arranged on the ferrite plate 9 . The ferrite plate 9 is magnetized in the magnetic field. Therefore, the magnetic flux from the ferrite plate 9 affects the inductance of the first helical coil 11 and the second helical coil 12 . In addition, the distance from the ferrite plate 9 to the first helical coil 11 is different from the dis...

Deformed example 1

[0086] For example, if Figure 7 As shown in part (a) of FIG. 1 , the power transmission coil device 2B of Modification 1 includes a power transmission coil unit 4B. In the power transmission coil part 4B, the first lead wire 13B and the second lead wire 14B may be connected from the spiral parts 13a, 14a (refer to figure 2 ) are arranged alternately every other turn from the inner side toward the outer side (along the direction intersecting the axis A). That is, the first coil layers 18 and the second coil layers 19 are alternately arranged every other turn of the first conducting wire 13B and the second conducting wire 14B. According to this configuration, the average distance difference (ΔE) between the average distance ( E1 ) of the first helical coil 11B and the average distance ( E2 ) of the second helical coil 12B can be further reduced.

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PUM

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Abstract

A power transmission coil device is provided with: a first spiral coil which includes a first lead wire spiraling around an axis; and a second spiral coil which includes a second lead wire spiraling around the axis, wherein the first spiral coil is electrically connected in parallel with the second spiral coil, and the first lead wire and the second lead wire are disposed side by side in the direction of the axis.

Description

technical field [0001] The present disclosure relates to coil arrangements. Background technique [0002] As means for transmitting electric power, a non-contact power supply system is known. The non-contact power supply system is a power supply system that utilizes electromagnetic induction or magnetic resonance generated by a coil. The system transmits power from a power transmitting device to a power receiving device that is not in direct contact with the power transmitting device. This system is applied, for example, to a system for charging a mobile body that uses electricity as an energy source such as an electric vehicle or a plug-in hybrid vehicle. In such a charging system, the power receiving device is mounted on the chassis of the electric vehicle, etc., and the power transmitting device is arranged under the vehicle. [0003] The technique described in Patent Document 1 is known as a coil device used in a contactless power feeding system. This coil device has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/14H01F17/04H01F27/28H02J50/10
CPCH01F38/14H02J50/10H01F5/00H01F27/2828H01F27/38H01F27/2823H01F27/36H01F27/363H01F27/24
Inventor 降矢健太郎德良晋西村贤二荒木淳奈贺野英树
Owner IHI CORP
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