Core having insulating sheet and electric device provided with such core

A technology for electrical equipment and insulating sheets, which is applied to electrical components, circuits, magnetic cores/yokes, etc., can solve the problems of the number of assembly processes, the increase in component costs, and the inability to confirm whether to insert gap materials, so as to reduce the number of assembly processes, The effect of improving stability

Active Publication Date: 2007-12-19
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] To sum up, the existing iron cores and transformers not only increase the number and types of gap materials, but also require mounting work for fixing multiple gap materials, which increases the number of assembly steps and component costs.
[0010] In addition, in the example of the U-shaped core 1 shown in Fig. 13 and the circular core 13 shown in Fig. 14, when assembling the transformer, the surroundings of each gap material are covered with a member such as a bobbin forming a coil. Next, after the transformer is assembled, it cannot be visually confirmed whether the interstitial material is inserted

Method used

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  • Core having insulating sheet and electric device provided with such core
  • Core having insulating sheet and electric device provided with such core
  • Core having insulating sheet and electric device provided with such core

Examples

Experimental program
Comparison scheme
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Embodiment approach 1

[0047] Embodiment 1 of the present invention will be described below with reference to FIGS. 1 to 4 . FIG. 1 is an external view of a set of U-shaped iron cores 1 constituting an iron core as an example of a core. FIG. 2 is an explanatory diagram for explaining the formation of the gap of the iron core. The iron core includes: a U-shaped iron core 1, a strip-shaped piece 2 described below, a V-shaped bending portion 3A of the strip-shaped piece 2, and a belt. The unbent portion of the sheet 2 (the portion other than the V-shaped bent portion 3A, hereinafter referred to as the unbent portion 3B), and the bobbin 4 . FIG. 3 is an external view of the strip sheet 2 . FIG. 4 is an external view showing a state in which the band piece 2, the U-shaped core 1, and the bobbin 4 are assembled.

[0048] Formation of the core gap in Embodiment 1 will be described below. As shown in FIG. 1 and FIG. 2 , for example, a pair of U-shaped cores 1 are configured to face each other. Furthermo...

Embodiment approach 2

[0062] In Embodiment 2, the same components as those in Embodiment 1 are assigned the same reference numerals, and detailed description thereof will be omitted.

[0063] The difference from Embodiment 1 is that, as shown in FIG. 5 , a continuous V-shaped bending portion 8A is produced by bending a part of the belt-shaped sheet 2 made of insulating material, and the continuous V-shaped The bent portion 8A is used to form a gap between the U-shaped cores 1 . Thus, by using the belt-shaped sheet 2 in which the continuous V-shaped bent portion 8A is produced, the thickness of the spacer can be doubled compared with the belt-shaped sheet 2 of FIG. 3 . In addition, if the V-shaped bending part is further added, the thickness of the spacer can be easily changed.

[0064] Next, the transformer according to Embodiment 2 will be described.

[0065] Although the shape of the bent part of the band-shaped piece 2 is different, as shown in FIG. The bent portion 8A can be clamped by the U...

Embodiment approach 3

[0071] In this third embodiment, the same components as those in the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0072] The difference from Embodiment 1 is that, as shown in FIG. 6 , an L-shaped bent portion 17A is formed by bending a part of a strip sheet 16 made of an insulating material, and is formed in an L-shape. Shaped ribbon sheet 16. This L-shaped bent portion 17A is used to form a gap between the U-shaped iron cores 1 . Thus, by using the strip-shaped sheet 16 in which the L-shaped bent portion 17A is formed, the length of the strip-shaped sheet 2 can be half that of the strip-shaped sheet 2 shown in FIG. 3 .

[0073] Next, the transformer according to Embodiment 3 will be described.

[0074] As shown in Figure 7, when assembling the U-shaped iron core 1, the bobbin 4, and the strip-shaped piece 16, the L-shaped bending portion 17A of the strip-shaped piece 16 is clamped by the U-shaped iron core 1, an...

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PUM

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Abstract

In a core having an insulating sheet and an electric device provided with such core, a bobbin is inserted into one section of the core which is composed of at least two sections, and at the same time, a substantially strip-like insulating sheet bent in substantially T shape or L shape is inserted. An unbent portion of the insulating sheet is arranged along the surface of the core. The other section of the core is inserted into the bobbin to have the bent portion of the insulating sheet sandwiched with the facing portions of the core.

Description

technical field [0001] The present invention mainly relates to a core with an insulating sheet and electrical equipment such as a transformer with the core. Background technique [0002] The configuration of an iron core, which is an example of a conventional core, and the configuration of a transformer having the same will now be described with reference to FIGS. 12 to 14 . In Fig. 12, when forming the air gap 10 (hereinafter referred to as the gap 10) of the E-shaped iron core 9 constituting the transformer, when a pair of E-shaped iron cores 9 are butted together, the part where the two are in contact, that is, the central part is cut. The gap 10 is formed by processing and forming a structure in which the central parts do not contact each other. [0003] In addition, as another example, in the case of using U-shaped iron cores 1 as shown in FIG. The U-shaped iron cores 1 on both sides come up to form a gap. In addition, the characteristics as a transformer can be chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/24
CPCH01F27/324H01F3/14
Inventor 田畑芳行高见良一岛林信介
Owner PANASONIC CORP
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