Power electronic capacitor with stable installation

Abstract

The utility model belongs to the technical field of capacitor production, and particularly relates to a power electronic capacitor with stable installation, which comprises a direct current support capacitor and a plurality of leading-out terminals vertically embedded at the top of the direct current support capacitor, the peripheral side of the pin is provided with a threaded groove extending along the axis direction of the pin, and the pin can be in threaded connection with a fastener through the threaded groove, wherein the fastener is used for installing and fixing the DC support capacitor and a device to be assisted. According to the utility model, the limiting mechanism is arranged on the peripheral side of the pin of the DC support capacitor, so that when the DC support capacitor is connected with the to-be-assisted equipment through a fastener (nut), the limiting mechanism can limit the movement of the fastener; therefore, the connection position between the to-be-assisted equipment and the direct-current support capacitor is prevented from loosening due to vibration transmission generated by operation of the to-be-assisted equipment, and the installation stability of the direct-current support capacitor is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to capacitor production technical field, more particularly to a kind of power electronic capacitor of stable installation. BACKGROUND

[0002] Capacitor is a kind of passive electronic components that store electric charge and energy, consisting of two conductive plates (polar plate) and the dielectric in between. When voltage is applied, the polar plate accumulates positive and negative charges, forming an electric field energy storage, and its capacity is determined by the polar plate area, dielectric characteristics and polar plate spacing. Capacitor has core functions such as blocking DC passing AC, filtering, coupling, energy storage, etc. in the circuit;

[0003] Capacitors are widely used in electronic circuits, and require a stable support structure to ensure their stability and reliability. Therefore, a bolt-supported capacitor has been designed in the prior art, in which the lead terminals of the capacitor are brass-plated tin bolts. By connecting the bolts and fasteners (nuts), the capacitor can be stably installed while achieving circuit connection.

[0004] As disclosed in the publication number CN202405117U, a bolt lead terminal capacitor includes a square shell plastic capacitor body and a lead terminal led out from the square shell plastic capacitor body, wherein the lead terminal is a bolt lead terminal, the bolt lead terminal includes a copper bolt column led out from the square shell plastic capacitor body and a metal sheet fixed on the copper bolt column, and the metal sheet is also located between the square shell plastic capacitor body and the copper bolt column. The bolt lead terminal capacitor changes the lead terminal of the capacitor to a bolt lead terminal. Since the cross-sectional area of the bolt is much larger than that of the cable or connector sheet, the current passing capacity is strong, and it can withstand large current impact, while also reducing the loss tangent value of the capacitor.

[0005] However, due to the long-term vibration of electronic devices during use, the threaded connection of the capacitor will also vibrate when the capacitor is installed with these devices, such as high-voltage frequency converters, photovoltaic inverters, electric locomotive / subway converters or wind power converters, which will cause the fasteners to loosen and affect the stability of the circuit.

[0006] In view of this, the utility model provides a power electronic capacitor with stable installation to solve the above problems. UTILITY MODEL CONTENTS

[0007] To achieve the above objectives, the present invention provides the following technical solution: a stable power electronic capacitor, comprising a DC support capacitor and a plurality of leads vertically embedded on the top of the DC support capacitor. Each lead has a vertically arranged columnar pin, and a threaded groove extending along its axis is formed on the periphery of the pin. The pin can be threadedly connected to a fastener for fixing the DC support capacitor to the auxiliary equipment through the threaded groove.

[0008] As a preferred embodiment of the present invention for a stable power electronic capacitor, the pin has a radially formed groove on its periphery, and the groove contains a limiting mechanism for restricting the movement of fasteners connected to the pin.

[0009] As a preferred embodiment of the present invention, the DC support capacitor includes a housing and two sets of cores connected in parallel within the housing. The cores are connected to the lead-out terminals via conductive components.

[0010] As a preferred embodiment of the present invention for a stable power electronic capacitor, an insulating sealing layer is filled between the housing and the two sets of cores.

[0011] As a preferred embodiment of the present invention for a stable power electronic capacitor, the limiting mechanism includes a second groove that is deepened within the groove, wherein the radial dimension of the second groove is greater than the radial dimension of the groove.

[0012] As a preferred embodiment of the present invention for a stable power electronic capacitor, the second groove is provided with a spring arranged along its axial direction, and a limiting block connected to one end of the spring.

[0013] The limiting block has a protrusion extending radially along the pin, the protrusion being able to extend into or out of the groove by the elasticity of the spring;

[0014] The surface of the protrusion near the top of the pin has a downwardly sloping surface.

[0015] As a preferred embodiment of the present invention for a stable power electronic capacitor, the limiting mechanism is a limiting spring piece placed in the groove. The limiting spring piece is arranged in an arc shape along the axial direction of the pin, and its arc-shaped arched end can retract and protrude out of the groove.

[0016] As a preferred embodiment of the present invention for a stable power electronic capacitor, the limiting mechanism includes a limiting block whose top end is elastically torsionally connected to the groove, and the bottom end of the limiting block can extend into or out of the groove under the action of external force.

[0017] As a preferred embodiment of the present invention for a stable power electronic capacitor, a connecting shaft is inserted through the top of the limiting block, and the two ends of the connecting shaft are respectively connected to the opposite surfaces in the groove. A torsion spring is sleeved on the periphery of the connecting shaft, one end of the torsion spring is connected to the limiting block, and the other end is connected to the inner wall of the groove.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This invention provides a limiting mechanism around the pins of a DC support capacitor. When the DC support capacitor is connected to the auxiliary equipment via fasteners, such as high-voltage frequency converters, photovoltaic inverters, electric locomotive / metro converters, or wind power converters, the limiting mechanism restricts the movement of the fasteners (nuts). This prevents the connection between the DC support capacitor and the auxiliary equipment from loosening due to vibration transmission caused by the operation of the auxiliary equipment, thereby effectively improving the stability of the DC support capacitor installation and the stability of the circuit connection. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a three-dimensional structural diagram of the DC-supported capacitor of this utility model;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure of the DC-supported capacitor of this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the first embodiment of the limiting mechanism of this utility model;

[0024] Figure 4 This is a cross-sectional structural diagram of the first embodiment of the limiting mechanism of this utility model;

[0025] Figure 5 This is a three-dimensional structural diagram of the second embodiment of the limiting mechanism of this utility model;

[0026] Figure 6 This is a cross-sectional structural diagram of the second embodiment of the limiting mechanism of this utility model;

[0027] Figure 7 This is a three-dimensional structural diagram of the third embodiment of the limiting mechanism of this utility model;

[0028] Figure 8 This is a cross-sectional structural diagram of the third embodiment of the limiting mechanism of this utility model.

[0029] In the diagram: 1. DC support capacitor; 11. Housing; 12. Core; 13. Lead-out terminal; 103. Pin; 14. Conductive component; 15. Insulating sealing layer; 2. Limiting mechanism; 201. Groove; 202. Second groove; 203. Spring; 204. Limiting block; 205. Limiting spring; 206. Limiting lever; 207. Connecting shaft. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model relates to a power electronic capacitor that is stably installed, such as Figures 1-2 As shown, it includes: a DC support capacitor 1, and a plurality of leads 13 vertically embedded on the top of the DC support capacitor 1. Figure 2 As shown, the DC support capacitor 1 includes a housing 11 and two sets of cores 12 connected in parallel inside the housing 11. The cores 12 are connected to the lead-out terminals 13 through conductive components 14. An insulating sealing layer 15 is filled between the housing 11 and the two sets of cores 12.

[0032] The lead-out terminal 13 has a vertically arranged columnar pin 103. A threaded groove extending along the axial direction is formed on the periphery of the pin 103. The lead-out terminal 13 can be threadedly connected to a suitable fastener (nut) through the threaded groove on the periphery of the pin 103 to achieve its installation and fixation with the auxiliary equipment, such as: high-voltage frequency converters, photovoltaic inverters, electric locomotive / subway converters, wind power converters, or mounting brackets for some capacitors. To prevent the fastener from loosening after connection, a groove 201 is radially formed on the periphery of the pin 103. A limiting mechanism 2 is provided within the groove 201 to restrict the movement of the fastener connected to the pin 103.

[0033] Figures 3-4The first embodiment of the limiting mechanism 2 of the present invention is shown, which includes a second groove 202 that is deepened within the groove 201 and has a radial dimension larger than that of the groove 201. In this embodiment, both the groove 201 and the second groove 202 are cylindrical. A spring 203 is provided in the second groove 202 along its axial direction, and a limiting block 204 is connected to one end of the spring 203. The limiting block 204 has a protrusion that extends radially along the pin 103. The protrusion can extend into or out of the groove 201 through the elastic axis of the spring 203. In this embodiment, the cross-section of the limiting block 204 is "T" shaped, and the rod-like structure at the bottom of the "T" shape is the aforementioned protrusion.

[0034] In practical use, after inserting pin 103 into the mounting hole corresponding to the auxiliary equipment, the fastener is threaded onto pin 103. By rotating the fastener, the fastener slides down along the axial direction of pin 103. When it slides down to the limit block 204, by pressing the protrusion of the limit block 204, the limit block 204 compresses the spring 203 and retracts into the groove 201. At the same time, the fastener is then tightened to make it continue to slide down. After passing the limit block 204, the limit block 204 automatically extends out of the groove 201 under the elastic action of the spring 203. This restricts the movement of the fastener on its movement path, thereby effectively preventing the fastener from loosening and detaching, and improving the stability of the DC support capacitor 1 installation and circuit.

[0035] Furthermore, to ensure that the limiting block 204 automatically retracts into the groove 201 during the tightening and sliding process of the fastener, a downwardly sloping surface can be provided on the surface of the protrusion of the limiting block 204 near the top of the pin 103. Additionally, a rounded chamfer can be provided at the edge of the sloping surface for better results. Figure 4 As shown, when the fastener is tightened, the guide effect of the inclined surface allows the fastener to slide down and contact the limiting block 204. The limiting block 204 can then gradually and automatically retract into the groove 201, thereby reducing the manual pressing process and making installation more convenient.

[0036] Figures 5-6 This illustrates a second embodiment of the limiting mechanism 2 of the present invention. The difference from the first embodiment is that the limiting mechanism 2 is a limiting spring 205 placed within the groove 201. The limiting spring 205 is arranged in an arc shape along the axial direction of the pin 103, such as... Figure 6 As shown, its arc-shaped arched end protrudes outside the groove 201. Because the limiting spring 205 has a certain elasticity, pressing the arc-shaped arched end of the limiting spring 205 can deform it and cause it to retract into the groove 201. In use, after the fastener is tightened, the arc-shaped arched end of the limiting spring 205 can restrict its displacement along the fastener's movement path, effectively preventing it from loosening and detaching.

[0037] Figures 7-8 This illustrates a third embodiment of the limiting mechanism 2 of the present invention. The difference from the first embodiment is that the limiting mechanism 2 is a limiting block 206 whose top end is elastically and torsionally connected within the groove 201. In this embodiment, as a preferred embodiment, the groove 201 is square. Specifically, as shown... Figure 8 As shown, a connecting shaft 207 is inserted through the top of the limiting block 206. The two ends of the connecting shaft 207 are respectively connected to opposite surfaces within the groove 201, thereby allowing the top of the limiting block 206 to rotate within the groove 201. To provide the limiting block 206 with a certain torque, a torsion spring (not marked in the figure) is sleeved around the connecting shaft 207. One end of the torsion spring is fixed to the limiting block 206, and the other end is fixed to the inner wall of the groove 201.

[0038] When the torsion spring is in a self-heating state, the bottom end of the limiting block 206 extends obliquely into the groove 201 along the tightening direction of the fastener. When the limiting block 206 is subjected to external pressure, its bottom end can twist the torsion spring to rotate and retract into the groove 201. In use, the extension of the bottom end of the limiting block 206 restricts the displacement of the fastener along its movement path, and the retraction of the bottom end of the limiting block 206 releases the restriction on the fastener's movement. Therefore, through the above characteristics, the fastener's displacement is restricted when it is tightened, and its movement is not obstructed when it is disassembled. This fulfills the practical application requirement of stable installation and removability of the DC support capacitor 1.

[0039] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A power electronic capacitor with stable mounting, comprising a DC support capacitor (1) and a plurality of leads (13) vertically embedded on the top of the DC support capacitor (1), characterized in that: The lead-out terminal (13) has a vertically arranged columnar pin (103), and a threaded groove extending along its axis is provided on the periphery of the pin (103). The pin (103) can be threadedly connected to a fastener for fixing the DC support capacitor (1) to the auxiliary equipment through the threaded groove.

2. The power electronic capacitor with stable installation according to claim 1, characterized in that: The pin (103) has a radial groove (201) on its periphery, and a limiting mechanism (2) is provided in the groove (201) to limit the movement of the fastener connected to the pin (103).

3. The power electronic capacitor with stable installation according to claim 1, characterized in that: The DC support capacitor (1) includes a housing (11) and two sets of cores (12) connected in parallel inside the housing (11). The cores (12) are connected to the lead-out terminals (13) through conductive components (14).

4. The power electronic capacitor with stable installation according to claim 3, characterized in that: An insulating sealing layer (15) is filled between the shell (11) and the two sets of cores (12).

5. The power electronic capacitor with stable installation according to claim 2, characterized in that: The limiting mechanism (2) includes a second groove (202) that is deepened within the groove (201), the radial dimension of the second groove (202) being greater than the radial dimension of the groove (201).

6. The power electronic capacitor with stable installation according to claim 5, characterized in that: The second groove (202) is provided with a spring (203) arranged along its axial direction, and a limiting block (204) connected to one end of the spring (203); The limiting block (204) has a protrusion extending radially along the pin (103), which can be inserted into or protruded from the groove (201) by the elasticity of the spring (203); The surface of the protrusion near the top of the pin (103) has a downwardly sloping surface.

7. The power electronic capacitor with stable installation according to claim 2, characterized in that: The limiting mechanism (2) is a limiting spring (205) placed in the groove (201). The limiting spring (205) is arc-shaped along the axial direction of the pin (103), and its arc-shaped arched end can be retracted and protrudes out of the groove (201).

8. The power electronic capacitor with stable installation according to claim 2, characterized in that: The limiting mechanism (2) includes a limiting block (206) whose top end is elastically torsionally connected to the groove (201). The bottom end of the limiting block (206) can extend into or out of the groove (201) under the action of external force.

9. The power electronic capacitor with stable installation according to claim 8, characterized in that: A connecting shaft (207) is inserted through the top of the limiting block (206). The two ends of the connecting shaft (207) are respectively connected to the opposite surfaces in the groove (201). A torsion spring is sleeved on the periphery of the connecting shaft (207). One end of the torsion spring is connected to the limiting block (206), and the other end is connected to the inner wall of the groove (201).

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