Capacitor assembly of power conversion device

Abstract

The utility model discloses a capacitor assembly of a power conversion device, which comprises symmetrically arranged end seats, four corners of the end seats are connected through pull rods, the pull rods on the same side are provided with a plurality of fixed plates which are arranged at equal intervals, movable plates are arranged among the fixed plates, the movable plates are fixedly arranged on a rotating shaft, the rotating shaft is rotatably connected with the end seats, and the end part of the rotating shaft is provided with a knob. And a power connection structure is mounted on the end seat and is in contact with the rotating shaft. According to the utility model, the rotary knob is rotated to drive the rotating shaft to rotate, the rotating shaft drives the moving plate to rotate, the moving plate rotates relative to the fixed plate, the area of the overlapped part of the rotating shaft and the fixed plate is changed to achieve the purpose of changing capacitance, and meanwhile, the fastening bolt is adjusted to change the force of clamping the rotating shaft by the conducting plate, so that the rotating shaft can be adjusted to avoid poor contact when the rotating shaft is loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitors, in particular to a capacitor component of a power conversion device. Background Art

[0002] A capacitor whose capacitance can be adjusted within a certain range is called a variable capacitor. The change of the capacity of a variable capacitor is achieved by changing the relative effective area between the pole pieces or when the distance between the pole pieces changes, its capacitance changes accordingly. It is generally composed of two sets of pole pieces that are insulated from each other: a fixed set of pole pieces is called a fixed piece, and a movable set of pole pieces is called a moving piece. The moving pieces of several variable capacitors can be assembled on the same shaft to form a coaxial variable capacitor; the existing capacitor's conductive piece will become loose after long-term use, and it needs to be adjustable to ensure its service life. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a capacitor component for a power conversion device.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A capacitor assembly of a power conversion device includes a symmetrically arranged end seat, wherein the four corners of the end seat are connected by a pull rod, a plurality of fixed plates are installed on the pull rod on the same side, the fixed plates are arranged equidistantly, and movable plates are arranged between the fixed plates. The movable plates are fixedly arranged on a rotating shaft, and the rotating shaft is rotatably connected to the end seat. A knob is installed at the end of the rotating shaft, and an electrical connection structure is installed on the end seat, and the electrical connection structure is in contact with the rotating shaft.

[0006] Preferably, a plurality of insulating retaining rings are provided on the pull rod and the rotating shaft, and the insulating retaining rings are located between adjacent stator plates and movable plates. The stator plates and movable plates are reinforced by nuts a, and the nuts a are threadedly connected to the pull rod and the rotating shaft respectively.

[0007] Preferably, the power connection structure includes a power connection terminal mounted on an end seat, a conductive sheet of the power connection terminal is clamped on both sides of the rotating shaft, and the conductive sheets are connected by fastening bolts, and the fastening bolts are located on both sides of the rotating shaft.

[0008] Preferably, the end of the pull rod is threadedly connected with a nut b.

[0009] Preferably, the side wall of the end seat is provided with radial reinforcement ribs.

[0010] Preferably, the projections of the two groups of stators on the end seat have no overlapping area.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model drives the shaft to rotate by rotating the knob, the shaft drives the movable plate to rotate, the movable plate rotates relative to the fixed plate, and the overlapping area of ​​the two is changed to achieve the purpose of changing the capacitance. At the same time, by adjusting the fastening bolts, the strength of the conductive plate clamping the shaft is changed, and when it is loose, it can be adjusted to avoid poor contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more specifically and intuitively illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0014] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0015] Figure 3 The structure of the utility model is shown in FIG. Figure 3 ;

[0016] Figure 4 The structure of the utility model is shown in FIG. Figure 4 .

[0017] In the figure: end seat 1, pull rod 2, knob 3, insulating retaining ring 4, nut a5, fixed plate 6, movable plate 7, nut b8, reinforcing rib 9, rotating shaft 10, power terminal 11, fastening bolt 12. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] Reference Figure 1-4 A capacitor assembly of a power conversion device includes a symmetrically arranged end seat 1, the four corners of the end seat 1 are connected by a pull rod 2, a plurality of stators 6 are installed on the same side pull rod 2, the stators 6 are equidistantly arranged, a moving plate 7 is arranged between the stators 6, the moving plate 7 is fixedly arranged on a rotating shaft 10, the rotating shaft 10 is rotatably connected to the end seat 1, a knob 3 is installed at the end of the rotating shaft 10, and an electric connection structure is installed on the end seat 1, and the electric connection structure is in contact with the rotating shaft 10.

[0020] By rotating the knob 3, the shaft 10 is driven to rotate, and the shaft 10 drives the movable plate 7 to rotate. The movable plate 7 rotates relative to the fixed plate 6, and the overlapping area of ​​the two is changed to achieve the purpose of changing the capacitance. At the same time, by adjusting the fastening bolt 12, the strength of the conductive sheet clamping the shaft 10 is changed. When it is loose, it can be adjusted to avoid poor contact.

[0021] In this embodiment, a plurality of insulating retaining rings 4 are provided on the pull rod 2 and the rotating shaft 10. The insulating retaining rings 4 are located between adjacent stator plates 6 and movable plates 7. The stator plates 6 and movable plates 7 are reinforced by nuts a5. The nuts a5 are threadedly connected to the pull rod 2 and the rotating shaft 10 respectively. There is no overlapping area in the projections of the two groups of stator plates 6 on the end seat 1.

[0022] In this embodiment, the power connection structure includes a power connection terminal 11 mounted on the end seat 1 , and the conductive sheet of the power connection terminal 11 is clamped on both sides of the rotating shaft 10 . The conductive sheets are connected by fastening bolts 12 , and the fastening bolts 12 are located on both sides of the rotating shaft 10 .

[0023] In this embodiment, the end of the pull rod 2 is threadedly connected with a nut b8 for installing the wire.

[0024] In this embodiment, the side wall of the end seat 1 is provided with radial reinforcement ribs 9 to improve its strength.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A capacitor assembly for a power conversion device, comprising symmetrically arranged end seats (1), characterized in that: The four corners of the end seat (1) are connected by a pull rod (2), and a plurality of fixed plates (6) are installed on the pull rod (2) on the same side. The fixed plates (6) are arranged at equal distances, and movable plates (7) are arranged between the fixed plates (6). The movable plates (7) are fixedly arranged on a rotating shaft (10), and the rotating shaft (10) is rotatably connected to the end seat (1). A knob (3) is installed at the end of the rotating shaft (10), and an electrical connection structure is installed on the end seat (1), and the electrical connection structure is in contact with the rotating shaft (10).

2. The capacitor assembly of a power conversion device according to claim 1, characterized in that: The pull rod (2) and the rotating shaft (10) are both provided with a plurality of insulating retaining rings (4), the insulating retaining rings (4) being located between adjacent fixed plates (6) and movable plates (7), the fixed plates (6) and movable plates (7) being both reinforced by nuts a (5), and the nuts a (5) being respectively threadedly connected to the pull rod (2) and the rotating shaft (10).

3. The capacitor assembly of a power conversion device according to claim 2, characterized in that: The power connection structure comprises a power connection end (11) mounted on an end seat (1), a conductive sheet of the power connection end (11) clamped on two sides of a rotating shaft (10), the conductive sheets are connected via fastening bolts (12), and the fastening bolts (12) are located on two sides of the rotating shaft (10).

4. The capacitor assembly of a power conversion device according to claim 3, characterized in that: The end of the pull rod (2) is threadedly connected with a nut b (8).

5. The capacitor assembly of a power conversion device according to claim 4, characterized in that: The side wall of the end seat (1) is provided with radial reinforcing ribs (9).

6. The capacitor assembly of a power conversion device according to claim 5, characterized in that: The projections of the two groups of stators (6) on the end seat (1) have no overlapping area.

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