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Film capacitor

A technology of film capacitors and capacitors, applied in the direction of film/thick film capacitors, laminated capacitors, fixed capacitor dielectrics, etc., can solve problems such as difficult to apply frequency areas

Inactive Publication Date: 2002-07-17
NISEI ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the mounting structure of the above-mentioned conventional joints, since the lead-out joint d and the lead-out joint e are installed in the center of the electrode layers a, g, respectively, there are areas of residual charge on the electrode layers a, g, and the inductance component and static electricity are passed through. Capacitors cause parallel resonance
Therefore, in use, there is a problem that it is difficult to apply to a specific frequency region (high frequency region)

Method used

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Examples

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Embodiment 1

[0024] In Example 1, a case where a metal foil is used as an electrode layer will be described. In the capacitor element at this time, polyethylene terephthalate, polyphenylene sulfide, or polyphenylene naphthalate is used as a dielectric film, and as an electrode layer As the material, metal foil such as aluminum foil or an alloy containing aluminum is used.

[0025] Common lead wires such as copper plating (CP: copper plating) wires are used for the lead-out connectors. A wound type series capacitor element 1 using the above material is placed in figure 1 In the figure, the coiled state is unwrapped and stretched.

[0026] figure 1 In the capacitor element 1, the insulating layer 2 composed of two strip-shaped dielectric films and the electrode layer 3 composed of a pair of aluminum foils alternated up and down are superimposed. Either one of the upper and lower electrodes (here, the upper side) of the electrode layer 3 is divided into two parts, and arranged in the lo...

Embodiment 2

[0032] In Example 1 above, the case where metal foil such as aluminum or the like was used for all electrode layers 3 was described. In Example 2, the structure in which the electrode layer is a combination of metal foil and a metallized film made of vapor-deposited metal is described. .

[0033] At this time, as shown in FIG. 3 , the electrode layer 6 on the lead wire 5 side is made of metal foil, and the electrode layer 8 on the opposite side with the dielectric film 7 is made of a metallized film. In addition, the attachment position of the lead wire 5 is set to the side where the electrode layer 6a and the electrode layer 6b are adjacent to each. In addition, the adjacent interval between the electrode layers 6a and 6b is set to 1 to 50 mm.

[0034] In addition, in the element structure at this time, the positional relationship between the metal foil, the dielectric film, and the metallized film, in addition to the above-mentioned FIG. Figure 4 The metal foil 6, the met...

Embodiment 3

[0037] FIG. 5 shows a capacitor element 1 according to Example 3 of the present invention. As shown in FIG. 5 , one electrode layer 9 is divided in the width direction (slits are provided in the winding direction). That is, the electrode layers 9 a and 9 b are formed by dividing in a direction of 90° with respect to the lead-out direction. Further, one of them is divided in the longitudinal direction, and lead wires 10 are formed on the divided electrode layers 9a and 9c, respectively. Even in this case, the lead wires 10 are attached at positions adjacent to the electrode layers 9a and 9c, respectively. In addition, another electrode layer 9d is divided in the longitudinal direction. Here, it is divided into 2 parts.

[0038] In addition, FIG. 5 shows a state in which the capacitor element 11 is not wound, and the dotted line in the figure shows a simulation of a current path.

[0039] The capacitor element 11 composed of such an element structure is stacked and wound wit...

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Abstract

The present invention relates to a film capacitor. The capacitor element of this film capacitor is constituted, by winding a belt-like first insulating layer, a belt-like first metal layer, a belt-like second insulating layer, a belt-like second metal layer. The second metal layer is seperated into at least two parts and the gap between them is adjusted to 1-50 m / m and the lead-out jionts are fitted at the terminals.

Description

technical field [0001] The present invention relates to a film capacitor for withstand voltage which is effective in pulse voltage circuits and the like. Background technique [0002] As a film capacitor for withstanding voltage, what is called a series type capacitor has been known from ancient times. [0003] This device consists of Figure 6 The structural composition of the elements shown in the longitudinal sectional view. The internal electrode is to set the electrode layers a, b, c, and g composed of strip-shaped metal foils such as aluminum or metal vapor-deposited films in a zigzag shape by clamping the dielectric film f, that is, the lateral direction of the electrode layers a, c, and g The position differs from the lateral position of the electrode layer b by approximately only half the width of the electrode layer. Such as Figure 7 As shown, by installing lead-out joints d and e on the electrode layers a and g, a plurality of unit capacitors are connected in ...

Claims

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Application Information

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IPC IPC(8): H01G4/18H01G4/33
Inventor 佐佐木昌郁阿部贵宏
Owner NISEI ELECTRIC
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