CN214672231U - Thin film capacitor - Google Patents
Thin film capacitor Download PDFInfo
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- CN214672231U CN214672231U CN202120543412.5U CN202120543412U CN214672231U CN 214672231 U CN214672231 U CN 214672231U CN 202120543412 U CN202120543412 U CN 202120543412U CN 214672231 U CN214672231 U CN 214672231U
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Abstract
The utility model relates to a film capacitor, belonging to the technical field of film capacitors; the technical problem to be solved is as follows: an improvement of a hardware structure of a film capacitor is provided; the technical scheme for solving the technical problems is as follows: the capacitor comprises a shell and a plurality of capacitor cores arranged in the shell, wherein a plurality of wire outlet rows are arranged at the top end of the shell, and fixing plates for mounting and fixing are arranged on two sides of the shell; the inner wall of the shell is provided with an epoxy plate, the plurality of capacitor cores are arranged in the shell, and the plurality of capacitor cores are communicated with each other through connecting pieces with different sizes; the shell is internally provided with a positioning plate and a wiring board for realizing the connection of the capacitor core electrodes, and the positioning plate and the wiring board are sequentially arranged below the wire outlet row; the inside of the shell is also provided with a connecting through plate for communicating the internal circuit of the capacitor; the utility model discloses be applied to wind-powered electricity generation field.
Description
Technical Field
The utility model relates to a film capacitor belongs to film capacitor technical field.
Background
The film capacitor is mainly formed by using plastic films such as polyethylene, polypropylene, polystyrene or polycarbonate as dielectrics and using metal foils as electrodes. Compared with ceramic capacitors, aluminum electrolytic capacitors and tantalum electrolytic capacitors, the film capacitor has the advantages of long service life, stable temperature characteristic and low loss. The film capacitor is widely applied in the wind power generation industry, the particularity of the wind power industry enables the capacitor and a circuit board to be installed and work, the problems such as overvoltage and overcurrent are easily broken, once the thin point of the film capacitor is subjected to dielectric breakdown, the generated sparks can further damage surrounding elements, even the whole circuit board is short-circuited, great obstruction is brought to operation and maintenance of a wind field, and if a protective cover is adopted to protect the film capacitor, the problem that the installation and the disassembly processes are inconvenient exists, so that the pressure resistance and the effective overcurrent amount of the film capacitor are particularly important.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an overcome not enough that exists among the prior art, the technical problem that will solve is: an improvement in the hardware structure of a film capacitor is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: a film capacitor comprises a shell and a plurality of capacitor cores arranged in the shell, wherein the top end of the shell is provided with a plurality of wire outlet rows, and fixing plates for mounting and fixing are arranged on two sides of the shell;
the inner wall of the shell is provided with an epoxy plate, the plurality of capacitor cores are arranged in the shell, and the plurality of capacitor cores are communicated with each other through connecting pieces with different sizes;
a heat-shrinkable sleeve for insulation is arranged on the outer side of the connecting piece;
the shell is internally provided with a positioning plate and a wiring board for realizing the connection of the capacitor core electrodes, and the positioning plate and the wiring board are sequentially arranged below the wire outlet row;
the inside of the shell is also provided with a connecting through plate for communicating the internal circuit of the capacitor;
the internal circuit of the film capacitor adopts a series structure, the series circuit structure comprises capacitors C1, C2 and C3 and resistors R1, R2 and R3, and the specific circuit structure is as follows:
one end of the resistor R1 is connected with one end of the capacitor C1 and one end of the capacitor C3 in parallel through conducting wires, and the other end of the resistor R1 is connected to the first terminal of the outlet line 7 through conducting wires;
the other end of the capacitor C1 is connected with one end of a capacitor C2 and one end of a resistor R2 in parallel through a lead, and the other end of the capacitor C2 is connected with the other end of a capacitor C3 and one end of a resistor R3 in parallel through a lead;
the other end of the resistor R2 is connected to a second terminal of the outlet line through a lead;
the other end of the resistor R3 is connected to the third terminal of the outlet line by a wire.
The capacitance values of the capacitors C1, C2 and C3 are respectively set to be 81.5 mu F, 81.5 mu F and 81.6 mu F;
the resistances of the resistors R1, R2 and R3 are respectively set to be 0.95m omega, 0.95m omega and 1.10m omega.
The shell is specifically set to be square or cuboid shape.
The outlet row specifically adopts red copper outlet row, the outlet row is provided with three terminal outgoing lines at least.
The thickness of the film is set specifically to 25 + -7% μm,the width and the sectional area of the connecting through plate are respectively set to be 100mm and 150cm2。
The utility model discloses beneficial effect for prior art possesses does: the film capacitor provided by the utility model improves the parameters, has two-point performance improvement, increases the withstand voltage by increasing the film thickness of the film capacitor by 5 microns, is not easy to be punctured, and improves the safety; and secondly, the novel internal series connection is adopted, the width and the sectional area of the connecting through plate are increased, the effective overcurrent amount of the capacitor is increased, higher economic benefit can be brought to the wind power plant, the wind power plant is more suitable for various working environments, the practicability is enhanced, and the service cycle is longer.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram of the electrical principle structure of the present invention;
FIG. 3 is a front view of FIG. 1;
FIG. 4 is a left side view of FIG. 1;
FIG. 5 is a top view of FIG. 1;
fig. 6 is a schematic view of the top-view internal structure of the present invention.
In the figure: 1 is a connecting sheet, 2 is a capacitor core, 3 is a positioning plate, 4 is a wiring board, 5 is an epoxy plate, 6 is a shell, 7 is a wire outlet bar, 8 is a fixing plate, and 9 is a connecting through plate.
Detailed Description
As shown in fig. 1 to 6, the film capacitor of the present invention includes a housing 6 and a plurality of capacitor cores 2 disposed inside the housing, wherein a plurality of outlet rows 7 are disposed at a top end of the housing 6, and fixing plates 8 for mounting and fixing are disposed at two sides of the housing 6;
the inner wall of the shell 6 is provided with an epoxy plate 5, the plurality of capacitor cores 2 are arranged in the shell 6, and the plurality of capacitor cores 2 are communicated with each other through connecting pieces 1 with different sizes;
a heat-shrinkable sleeve for insulation is arranged on the outer side of the connecting piece 1;
the shell 6 is also internally provided with a positioning plate 3 and a wiring board 4 for realizing the connection of the capacitor core electrodes, and the positioning plate 3 and the wiring board 4 are sequentially arranged below the wire outlet row 7;
a connecting through plate 9 for communicating the internal circuit of the capacitor is also arranged in the shell 6;
the internal circuit of the film capacitor adopts a series structure, the series circuit structure comprises capacitors C1, C2 and C3 and resistors R1, R2 and R3, and the specific circuit structure is as follows:
one end of the resistor R1 is connected with one end of the capacitor C1 and one end of the capacitor C3 in parallel through conducting wires, and the other end of the resistor R1 is connected to the first terminal of the outlet line 7 through conducting wires;
the other end of the capacitor C1 is connected with one end of a capacitor C2 and one end of a resistor R2 in parallel through a lead, and the other end of the capacitor C2 is connected with the other end of a capacitor C3 and one end of a resistor R3 in parallel through a lead;
the other end of the resistor R2 is connected to the second terminal of the outlet line 7 through a lead;
the other end of the resistor R3 is connected to the third terminal of the outlet line 7 by a wire.
The capacitance values of the capacitors C1, C2 and C3 are respectively set to be 81.5 mu F, 81.5 mu F and 81.6 mu F;
the resistances of the resistors R1, R2 and R3 are respectively set to be 0.95m omega, 0.95m omega and 1.10m omega.
The housing 6 is specifically provided in a square shape or a rectangular parallelepiped shape.
The outlet line bank 7 specifically adopts a red copper outlet line bank, and the outlet line bank 7 is at least provided with three outlet terminals.
The thickness of the thin film is set to 25 + -7% μm, and the width and the sectional area of the connecting through-plate 9 are set to 100mm and 150cm2, respectively.
The utility model provides a film capacitor's capacitor body shell 6 is the cuboid, and 6 casting epoxy of shell solidify, and there is capacitor core 2 inside the condenser, and the bottom is epoxy board 5, and inside 1 intercommunication electric capacity of not unidimensional hookup piece to the film is insulating, and the size of hookup piece 1 includes 0.5x25x210, 0.5x25x110, 0.5x25x 50. The capacitor is internally provided with a metalized film with the size of 25 mu mx150mmx10mm +/-5 percent (thickness x width x margin of the metalized film). The red copper outgoing line row 7, the positioning plate 3 and the wiring board 4 are positioned on the same vertical plane, the red copper outgoing line row 7 is positioned outside the capacitor, the size of the red copper outgoing line row is 4x25x48, the size of the positioning plate 3 is 2x62x140, the positioning plate is positioned below the red copper outgoing line row 7, the size of the wiring board 4 is 4x25x110, the cross-shaped groove pan head screw is positioned on the wiring board 4, three capacitors with the sizes of 81.5 muF, 81.5 muF and 81.6 muF are in a series structure and are connected with resistors with the sizes of 0.95m omega, 0.95m omega and 1.10m omega respectively at the same time, the utility model discloses the series structure adopted by the internal core can effectively ensure that the capacitor can be suitable for a higher voltage environment, and simultaneously, because the width and the sectional area of the connecting plate are increased, the effective current quantity which can pass through the capacitor is also increased; the above dimensions are in mm.
The utility model has the advantages that the voltage resistance between the electrodes of the thin film capacitor is 1.49KV, the voltage resistance between the electrodes and the shell is 3.4KV, the capacitance error is +/-5%, the thin film capacitor has good inrush current resistance, the reliability and the safety of the finally formed thin film capacitor are enhanced, and the service life is prolonged; the film thickness alone of the film cannot be used to comment on the quality of the thin film capacitor, and the thin film of the thin film capacitor is generally classified into a metallized thin film and a base film (also referred to as a white film). The white film generally comprises polypropylene and polyester. Polyester is not generally used as a dielectric, and the thicker the dielectric (white film), the higher the voltage it will withstand, and vice versa. Generally, the thin film of the capacitor is also associated with a metal plating, the thicker the metal plating, the stronger the overcurrent capability. On the contrary, the overcurrent capability is weaker, and the heat generation amount is lower. The thickness of the film of the utility model is set to 25 +/-7% mu m, which is increased by 5 mu m than before, thereby improving the pressure resistance; the particular setting of the widths and cross-sectional areas of the pass plates to 100mm and 150cm has increased by 25mm and 17.7cm, respectively, over the previous, having improved the effective current amounts of the capacitors.
The utility model provides a film capacitor's withstand voltage 0.69KV, rated capacity is 3X 54Kvar, and the specification and dimension is 200X 230X 120mm, and film capacitor membrane thickness increases 5 μm for also be difficult to puncture under high-pressure condition. Furthermore, the utility model provides an inside novel series connection structure that adopts of film capacitor, three resistance are 0.95m omega, 1.10m omega respectively, and three electric capacity is 81.5 uF, 81.6 uF respectively, connects logical board width and sectional area to increase respectively for 25mm and 17.7cm, and effective overcurrent volume is showing and is increasing.
The utility model provides a film capacitor, the capacitance body is the cuboid, including the shell with be located the shell the condenser core, inner structure has the multilayer sheetmetal to the film is insulating. The utility model discloses the string formula structure that inside core adopted can the suitable higher voltage environment of effectual assurance condenser, simultaneously, because connect the width and the sectional area increase of logical board, the effective current volume that the condenser can pass through also increases.
About the utility model discloses what the concrete structure need explain, the utility model discloses a each part module connection relation each other is definite, realizable, except that the special explanation in the embodiment, its specific connection relation can bring corresponding technological effect to based on do not rely on under the prerequisite of corresponding software program execution, solve the utility model provides a technical problem, the utility model provides a model, the connection mode of parts, module, specific components and parts that appear all belong to the prior art such as the published patent that technical staff can acquire before the application day, published journal paper, or common general knowledge, need not to describe in detail for the technical scheme that the present case provided is clear, complete, realizable, and can be according to this technical means or obtain corresponding entity product.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (5)
1. A film capacitor comprising a case (6) and a plurality of capacitor elements (2) arranged inside the case, characterized in that: a plurality of wire outlet rows (7) are arranged at the top end of the shell (6), and fixing plates (8) for mounting and fixing are arranged on two sides of the shell (6);
the inner wall of the shell (6) is provided with an epoxy plate (5), the plurality of capacitor cores (2) are arranged in the shell (6), and the plurality of capacitor cores (2) are communicated with each other through connecting pieces (1) with different sizes;
a heat-shrinkable sleeve for insulation is arranged on the outer side of the connecting piece (1);
the shell (6) is also internally provided with a positioning plate (3) and a wiring board (4) for realizing the connection of the capacitor core electrodes, and the positioning plate (3) and the wiring board (4) are sequentially arranged below the wire outlet row (7);
a connecting through plate (9) used for communicating the internal circuit of the capacitor is also arranged in the shell (6);
the internal circuit of the film capacitor adopts a series circuit structure, the series circuit structure comprises capacitors C1, C2 and C3 and resistors R1, R2 and R3, and the specific circuit structure is as follows:
one end of the resistor R1 is connected with one end of the capacitor C1 and one end of the capacitor C3 in parallel through conducting wires, and the other end of the resistor R1 is connected to the first terminal of the outgoing line bank (7) through conducting wires;
the other end of the capacitor C1 is connected with one end of a capacitor C2 and one end of a resistor R2 in parallel through a lead, and the other end of the capacitor C2 is connected with the other end of a capacitor C3 and one end of a resistor R3 in parallel through a lead;
the other end of the resistor R2 is connected to a second terminal of the outlet line bank (7) through a lead;
the other end of the resistor R3 is connected to the third terminal of the outlet line bank (7) through a lead wire.
2. A film capacitor according to claim 1, wherein: the capacitance values of the capacitors C1, C2 and C3 are respectively set to be 81.5 mu F, 81.5 mu F and 81.6 mu F;
the resistances of the resistors R1, R2 and R3 are respectively set to be 0.95m omega, 0.95m omega and 1.10m omega.
3. A film capacitor according to claim 1, wherein: the shell (6) is specifically set to be in a square shape or a cuboid shape.
4. A film capacitor according to claim 1, wherein: the outlet line bank (7) is a red copper outlet line bank, and the outlet line bank (7) is at least provided with three outlet terminals.
5. A film capacitor according to claim 1, wherein: the thickness of the thin film is set to be 25 +/-7% mu m, and the width and the sectional area of the connecting through plate (9) are respectively set to be 100mm and 150cm2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120543412.5U CN214672231U (en) | 2021-03-16 | 2021-03-16 | Thin film capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120543412.5U CN214672231U (en) | 2021-03-16 | 2021-03-16 | Thin film capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214672231U true CN214672231U (en) | 2021-11-09 |
Family
ID=78454027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120543412.5U Active CN214672231U (en) | 2021-03-16 | 2021-03-16 | Thin film capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214672231U (en) |
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2021
- 2021-03-16 CN CN202120543412.5U patent/CN214672231U/en active Active
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