CN210380650U - Power supply filtering device - Google Patents
Power supply filtering device Download PDFInfo
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- CN210380650U CN210380650U CN201921587074.4U CN201921587074U CN210380650U CN 210380650 U CN210380650 U CN 210380650U CN 201921587074 U CN201921587074 U CN 201921587074U CN 210380650 U CN210380650 U CN 210380650U
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- power supply
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Abstract
The utility model provides a power supply filtering device, which comprises a shell, wherein a baffle plate with an L-shaped structure is arranged in the shell, the baffle plate divides the shell into a first isolation cavity and a second isolation cavity, a power supply filtering circuit board is arranged in the first isolation cavity, a first feedthrough filter and a second feedthrough filter which are connected to the input end of the power supply filtering circuit board are arranged on the baffle plate, the input ends of the first feedthrough filter and the second feedthrough filter are connected with a power supply input lead, and the power supply input lead is accommodated in the second isolation cavity; the output end of the power supply filter circuit board is connected with a power supply output lead; the power input lead and the power output lead are both high-temperature shielding leads; the shell is provided with a cover plate for sealing the inner cavity. The condition that the power input line and the power output line are not isolated from crosstalk coupling is improved.
Description
Technical Field
The utility model relates to a filtering equipment technical field, concretely relates to power filter device.
Background
The power input line and the power output line are not isolated in connection, so that crosstalk coupling is generated, and interference mutual coupling between other signal lines in the product and a power wire is easy to form in use, so that the problem that the equipment can not meet the requirement of electromagnetic compatibility is caused.
SUMMERY OF THE UTILITY MODEL
Not enough to exist among the prior art, the utility model provides a power filter has solved power input line and power output line and has not kept apart the problem of gan at the crosstalk coupling.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a power supply filtering device comprises a shell, wherein a partition plate of an L-shaped structure is arranged in the shell, the partition plate divides the shell into a first isolation cavity and a second isolation cavity, a power supply filtering circuit board is arranged in the first isolation cavity, a first feedthrough filter and a second feedthrough filter which are connected to the input end of the power supply filtering circuit board are arranged on the partition plate, the input ends of the first feedthrough filter and the second feedthrough filter are connected with a power supply input lead, and the power supply input lead is accommodated in the second isolation cavity; the output end of the power supply filter circuit board is connected with a power supply output lead; the power input lead and the power output lead are both high-temperature shielding leads; and the shell is provided with a cover plate for sealing the inner cavity.
Preferably, insulators are arranged at the joints of the power input lead, the power output lead and the shell.
Preferably, the first feedthrough filter and the second feedthrough filter are both provided with threaded sections, and the threaded sections penetrate through the partition plate and are provided with locking nuts in a screwed mode.
Preferably, a power supply filter circuit connected with the output ends of the first feedthrough filter and the second feedthrough filter is arranged on the power supply filter circuit board, the power supply filter circuit comprises a common mode inductor L1 and a common mode inductor L2 which are sequentially connected in series from the input end to the output end, a capacitor C4 and a capacitor C5 are sequentially connected in series between the input ends of the common mode inductor L1, a capacitor C4 and a capacitor C5 are grounded, and a capacitor C3 is connected in parallel between the capacitor C4 and the capacitor C5; the output end of the common mode inductor L1 is connected with a capacitor C6 in parallel; a capacitor C7 and a capacitor C8 are sequentially connected in series between the input ends of the common-mode inductor L2, and the capacitor C7 and the capacitor C8 are grounded.
Preferably, the first feedthrough filter and the second feedthrough filter are both provided with grounding soldering lugs fixedly connected on the partition board.
Preferably, a polytetrafluoroethylene film is arranged between the common-mode inductor L1 and the common-mode inductor L2 and the power supply filter circuit board.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the inner part of the shell is divided into a first isolation cavity and a second isolation cavity through a partition plate, a first feedthrough filter and a second feedthrough filter are arranged on the partition plate, a power supply filter circuit board is arranged in the first isolation cavity, so that the input and the output of a power supply line are isolated through the first feedthrough filter and the second feedthrough filter, the isolation effect is realized through the first isolation cavity and the second isolation cavity, and meanwhile, the filtering is carried out through a power supply filter circuit, so that the crosstalk coupling condition between interference signals is prevented;
2. the power input lead and the power output lead are high-temperature shielding wires, and are fixed with the shell through a shielding layer on the high-temperature shielding wires, so that high-frequency noise is effectively prevented from being coupled to the power line, and the whole situation of electromagnetic compatibility is guaranteed.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
in the figure, a shell 1, a first isolation cavity 101, a second isolation cavity 102, a partition plate 2, a first feedthrough filter 3, a second feedthrough filter 4, a power input lead 5, a power output lead 6, a cover plate 7, an insulator 8, a lock nut 9, a grounding welding sheet 10 and a power filter circuit board 11.
Detailed Description
The present invention is further described with reference to the following drawings and specific embodiments so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not to be construed as limiting the present invention.
As shown in fig. 1-2, the utility model provides a power filter device, including casing 1, be equipped with the baffle 2 of "L" shape structure in the casing 1, baffle 2 is divided into first isolation chamber 101 and second isolation chamber in with casing 1, install power filter circuit board 11 in the first isolation chamber 101, install first feedthrough filter 3 and second feedthrough filter 4 that are connected to power filter circuit board 11's input on the baffle 2, first feedthrough filter 3, second feedthrough filter 4 all adopt DJLCX-4730-type resin sealed spiral shell dress wave filter, and the input of first feedthrough filter 3 and second feedthrough filter 4 is connected with power input wire 5, and power input wire 5 is accomodate in second isolation chamber 102; the output end of the power supply filter circuit board 11 is connected with a power supply output lead 6; the power input lead 5 and the power output lead 6 are both high-temperature shielding leads, and the model adopts AFR-250-1.0; a cover plate 7 for sealing the inner cavity is arranged on the shell 1; the power input and the power output are isolated through the first feedthrough filter 3 and the second feedthrough filter 4, and meanwhile, the isolation effect formed by the first isolation cavity 101 and the second isolation cavity 102 is combined, so that crosstalk coupling between the power input and the power output cannot be generated, filtering is performed through the power filter circuit board 11, the filtering effect of the power part is enhanced, and the condition that high-frequency noise is coupled to a power wire is further avoided; meanwhile, the shielding layer of the high-temperature shielding wire is fixed on the shell 1, so that good grounding is formed, and the shielding effect on high-frequency noise is improved.
In order to ensure the insulation effect of the connection between the power input lead 5 and the power output lead 6 and the shell 1, insulators 8 are arranged at the connection positions of the power input lead 5 and the shell 1, the power output lead 6 and the shell 1, and the insulators 8 are installed outwards from the inside of the shell 1 and are bonded through DG-3S adhesive, so that the installation stability of the insulators 8 is ensured, and a good insulation effect is kept.
In order to make first cross-core filter 3, second cross-core filter 4 install on baffle 2 stably, avoid the swing that exists after whole device installs on the product, vibrate and take place the condition of breaking away from, all be equipped with the screw thread section on letting first cross-core filter 3, the second cross-core filter 4 to pass baffle 2 at the screw thread section and revolve and be equipped with lock nut 9, through lock nut 9 to the installation stability of first cross-core filter 3, second wave filter.
A power supply filter circuit connected with the output ends of the first feedthrough filter 3 and the second feedthrough filter 4 is arranged on the power supply filter circuit board 11, the power supply filter circuit comprises a common mode inductor L1 and a common mode inductor L2 which are sequentially connected in series from the input end to the output end, a capacitor C4 and a capacitor C5 are sequentially connected in series between the input ends of the common mode inductor L1, a capacitor C4 and a capacitor C5 are grounded, and a capacitor C3 is connected in parallel between the capacitor C4 and the capacitor C5; the output end of the common mode inductor L1 is connected with a capacitor C6 in parallel; a capacitor C7 and a capacitor C8 are sequentially connected in series between the input ends of the common-mode inductor L2, and the capacitor C7 and the capacitor C8 are grounded; the whole power supply filter circuit adopts two-stage filtering, two-stage common-mode inductors and 4 grounded Y capacitors are arranged on the circuit to suppress common-mode interference, and 2 interline X capacitors are adopted to suppress differential-mode interference, so that the high-frequency filtering effect of a power supply part is improved.
In order to improve the high-frequency filtering effect, the first feedthrough filter 3 and the second feedthrough filter 4 are both provided with grounding tabs 10 fixedly connected to the partition board 2.
When the common mode inductor is mounted on the power filter circuit board 11, a teflon film is provided between the common mode inductor L1, the i-mode inductor L2, and the power filter circuit board 11 in order to ensure an insulation effect.
In the explanation of the present invention, it should be noted that the terms "first", "second", and the like are only for convenience of description and understanding, and do not limit the number of usage, the order of installation, or the degree of importance of specific technical features.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (6)
1. A power filter device, characterized by: the power supply isolation device comprises a shell (1), wherein a partition plate (2) of an L-shaped structure is arranged in the shell (1), the partition plate (2) divides the interior of the shell (1) into a first isolation cavity (101) and a second isolation cavity, a power supply filter circuit board (11) is installed in the first isolation cavity (101), a first feedthrough filter (3) and a second feedthrough filter (4) which are connected to the input end of the power supply filter circuit board (11) are installed on the partition plate (2), the input ends of the first feedthrough filter (3) and the second feedthrough filter (4) are connected with a power supply input lead (5), and the power supply input lead (5) is accommodated in the second isolation cavity (102); the output end of the power supply filter circuit board (11) is connected with a power supply output lead (6); the power input lead (5) and the power output lead (6) are both high-temperature shielding leads; and a cover plate (7) for sealing the inner cavity is arranged on the shell (1).
2. A power supply filter device according to claim 1, wherein: and insulators (8) are arranged at the joints of the power input lead (5), the power output lead (6) and the shell (1).
3. A power supply filter device according to claim 2, wherein: and the first feedthrough filter (3) and the second feedthrough filter (4) are both provided with thread sections, and the thread sections penetrate through the partition plate (2) and are provided with locking nuts (9) in a rotating manner.
4. A power supply filter device according to claim 3, wherein: the power supply filter circuit board (11) is provided with a power supply filter circuit connected with the output ends of the first feedthrough filter (3) and the second feedthrough filter (4), the power supply filter circuit comprises a common mode inductor L1 and a common mode inductor L2 which are sequentially connected in series from the input end to the output end, a capacitor C4 and a capacitor C5 are sequentially connected in series between the input ends of the common mode inductor L1, a capacitor C4 and a capacitor C5 are grounded, and a capacitor C3 is connected in parallel between the capacitor C4 and the capacitor C5; the output end of the common mode inductor L1 is connected with a capacitor C6 in parallel; a capacitor C7 and a capacitor C8 are sequentially connected in series between the input ends of the common-mode inductor L2, and the capacitor C7 and the capacitor C8 are grounded.
5. A power supply filtering device according to claim 4, characterized in that: and the first feedthrough filter (3) and the second feedthrough filter (4) are both provided with grounding welding sheets (10) fixedly connected on the partition plate (2).
6. A power supply filtering device according to claim 5, characterized in that: and a polytetrafluoroethylene film is arranged between the common-mode inductor L1, the common-mode inductor L2 and the power supply filter circuit board (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921587074.4U CN210380650U (en) | 2019-09-19 | 2019-09-19 | Power supply filtering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921587074.4U CN210380650U (en) | 2019-09-19 | 2019-09-19 | Power supply filtering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210380650U true CN210380650U (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921587074.4U Active CN210380650U (en) | 2019-09-19 | 2019-09-19 | Power supply filtering device |
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| CN (1) | CN210380650U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697801A (en) * | 2020-06-29 | 2020-09-22 | 重庆大及电子科技有限公司 | Large-current power supply filtering device |
-
2019
- 2019-09-19 CN CN201921587074.4U patent/CN210380650U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697801A (en) * | 2020-06-29 | 2020-09-22 | 重庆大及电子科技有限公司 | Large-current power supply filtering device |
| CN111697801B (en) * | 2020-06-29 | 2022-04-05 | 重庆大及电子科技有限公司 | Large-current power supply filtering device |
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