Capacitor and terminal structure thereof

Abstract

The utility model discloses a capacitor and a terminal structure thereof, the terminal structure of the capacitor comprises terminals connected with a capacitor core, each phase of the capacitor is provided with at least three terminals, and the at least three terminals are adjacently arranged at intervals. According to the utility model, the terminal current is shunted to reduce self-inductance.

Description

Technical Field

[0001] The utility model relates to the technical field of metallized film capacitors, in particular to a capacitor and a terminal structure thereof. Background Art

[0002] With the rapid development of power electronics technology, metallized film capacitors are increasingly used in industrial control, new energy, automotive electronics, rail transit, power grids and other fields. At the same time, the product performance requirements for metallized film capacitors are also getting higher and higher.

[0003] In the related art, metallized film capacitors are generally connected to IGBTs using a one-phase two-terminal design. The drawback is that the design of only two terminals per phase makes the self-inductance relatively large, especially for high-frequency application scenarios, which require a smaller self-inductance. The existing design is difficult to meet the usage requirements of high-frequency application scenarios. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the above technology at least to a certain extent. To this end, one purpose of the utility model is to provide a terminal structure of a capacitor, which reduces the self-inductance by shunting the terminal current.

[0005] The second objective of the utility model is to provide a capacitor which reduces the self-inductance by shunting the terminal current.

[0006] To achieve the above objectives, a first embodiment of the utility model provides a terminal structure of a capacitor, including terminals connected to a capacitor core, each phase of the capacitor is provided with at least three terminals, and the at least three terminals are arranged adjacent to each other.

[0007] According to a terminal structure of a capacitor in an embodiment of the utility model, since each phase of the capacitor is provided with at least three terminals, the at least three terminals are arranged adjacent to each other to realize the shunting of the terminal current, thereby reducing the self-inductance, and the self-inductance can be reduced to 6nH (nanohenry).

[0008] In addition, the terminal structure of a capacitor proposed in the above embodiment of the utility model may also have the following additional technical features:

[0009] Optionally, each phase of the capacitor is provided with three terminals, and the width of the middle terminal among the three terminals is greater than the width of the terminals on both sides thereof.

[0010] Optionally, the terminal is formed by bending and connecting a vertical portion and a horizontal portion.

[0011] Specifically, the vertical portion of the middle terminal among the three terminals extends to the vertical portions of the terminals on both sides adjacent to the middle terminal to form a composite stacked structure.

[0012] Specifically, a partition is provided between the vertical portion of the middle terminal and the vertical portions of the terminals on both sides thereof among the three terminals, so as to form a composite stacking structure.

[0013] In order to achieve the above-mentioned object, the second embodiment of the utility model provides a capacitor, comprising:

[0014] A capacitor core, wherein the capacitor core is disposed in the housing;

[0015] The terminal structure includes terminals connected to the capacitor core, each phase terminal is provided with at least three terminals, and the at least three terminals are provided adjacently and spaced apart.

[0016] A capacitor according to an embodiment of the utility model includes a terminal structure. Since each phase of the capacitor is provided with at least three terminals, the at least three terminals are arranged adjacent to each other to realize the shunting of the terminal current, thereby reducing the self-inductance. The self-inductance can be reduced to 6nH (nanohenry).

[0017] In addition, a capacitor according to the above embodiment of the utility model may also have the following additional technical features:

[0018] Optionally, each phase of the capacitor is provided with three terminals, and the width of the middle terminal among the three terminals is greater than the width of the terminals on both sides thereof.

[0019] Optionally, the terminal is formed by bending and connecting a vertical portion and a horizontal portion.

[0020] Specifically, the vertical portion of the middle terminal among the three terminals extends to the vertical portions of the terminals on both sides adjacent to the middle terminal to form a composite stacked structure.

[0021] Specifically, a partition is provided between the vertical portion of the middle terminal and the vertical portions of the terminals on both sides thereof among the three terminals, so as to form a composite stacking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0024] Description of symbols

[0025] Capacitor core 1 , terminal 2 , vertical portion 21 , horizontal portion 22 . DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0028] like Figure 1 and Figure 2 As shown, a terminal structure of a capacitor in an embodiment of the utility model includes a terminal 2 connected to a capacitor core 1, and each phase of the capacitor is provided with at least three terminals 2, and the at least three terminals 2 are arranged adjacent to each other at intervals.

[0029] A terminal structure of a capacitor in an embodiment of the utility model has at least three terminals 2 for each phase of the capacitor, and the at least three terminals 2 are arranged adjacent to each other to realize current shunting of the terminals 2, thereby reducing self-inductance, and the self-inductance can be reduced to 6nH (nanohenry).

[0030] Optionally, each phase of the capacitor is set to three terminals 2, and the width of the middle terminal 2 among the three terminals 2 is greater than the width of the terminals 2 on both sides thereof, that is, among the three terminals 2, the middle terminal 2 is the widest, and the widths of the terminals 2 on both sides are smaller, thereby reducing material consumption while ensuring the current carrying capacity.

[0031] Optionally, the terminal 2 is formed by bending and connecting a vertical portion 21 and a horizontal portion 22. Figure 2 As shown, the vertical portion 21 of the middle terminal 2 among the three terminals 2 extends to the vertical portions 21 of the terminals 2 on both sides adjacent to the middle terminal 2 to form a composite stacking structure, further reducing the self-inductance.

[0032] like Figure 1 and Figure 2 As shown, a capacitor of an embodiment of the utility model includes a capacitor core 1 and a terminal structure, wherein the capacitor core 1 is arranged in a housing; the terminal structure includes terminals 2 connected to the capacitor core 1, each phase of the capacitor is arranged with at least three terminals 2, and the at least three terminals 2 are arranged adjacent to each other.

[0033] A capacitor according to an embodiment of the utility model includes a terminal structure. Since each phase of the capacitor is provided with at least three terminals 2, the at least three terminals 2 are arranged adjacent to each other to realize current shunting of the terminals 2, thereby reducing self-inductance. The self-inductance can be reduced to 6nH (nanohenry).

[0034] Optionally, each phase of the capacitor is set to three terminals 2, and the width of the middle terminal 2 among the three terminals 2 is greater than the width of the terminals 2 on both sides thereof, that is, among the three terminals 2, the middle terminal 2 is the widest, and the widths of the terminals 2 on both sides are smaller, thereby reducing material consumption while ensuring the current carrying capacity.

[0035] Optionally, the terminal 2 is formed by bending and connecting a vertical portion 21 and a horizontal portion 22. Figure 2 As shown, the vertical portion 21 of the middle terminal 2 among the three terminals 2 extends to the vertical portions 21 of the terminals 2 on both sides adjacent to the middle terminal 2 to form a composite stacking structure, further reducing the self-inductance.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A terminal structure of a capacitor, characterized in that: It includes terminals connected to the capacitor core, each phase of the capacitor is provided with at least three terminals, and the at least three terminals are arranged adjacently and spaced apart; the terminals are formed by bending and connecting vertical parts and horizontal parts; a partition is provided between the vertical part of the middle terminal among the three terminals and the vertical parts of the terminals on both sides thereof, forming a composite stacked structure.

2. A capacitor terminal structure as claimed in claim 1, characterized in that: Each phase of the capacitor is provided with three terminals, and the width of the middle terminal among the three terminals is greater than the width of the terminals on both sides thereof.

3. A capacitor, comprising: A capacitor core, wherein the capacitor core is disposed in the housing; A terminal structure, the terminal structure comprising terminals connected to the capacitor core, each phase terminal being provided with at least three terminals, the at least three terminals being provided adjacently and spaced apart; The terminal is formed by bending and connecting a vertical portion and a horizontal portion; a partition is provided between the vertical portion of the middle terminal and the vertical portions of the terminals on both sides of the three terminals to form a composite stacking structure.

4. A capacitor as claimed in claim 3, wherein each phase of the capacitor is provided with three terminals, and the width of the middle terminal among the three terminals is greater than the width of the terminals on both sides thereof.

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