CN201616675U - Transient prevention and stable state combined interference power supply filter - Google Patents

Transient prevention and stable state combined interference power supply filter Download PDF

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Publication number
CN201616675U
CN201616675U CN2009203192489U CN200920319248U CN201616675U CN 201616675 U CN201616675 U CN 201616675U CN 2009203192489 U CN2009203192489 U CN 2009203192489U CN 200920319248 U CN200920319248 U CN 200920319248U CN 201616675 U CN201616675 U CN 201616675U
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common mode
filter
ground
circuit
differential mode
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CN2009203192489U
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邱扬
任琦
宋博
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Xi'an Kairong Electronic Technologies Co Ltd
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Xi'an Kairong Electronic Technologies Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

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Abstract

The utility model relates to a power supply filter, which belongs to the technology of power supply filtration and protection, and particularly relates to a transient prevention and stable state combined interference power supply filter. The power supply filter is characterized by at least comprising a protection circuit and filter circuits which are serially connected; the filter circuits are encapsulated inside a filter casing manufactured by cold-roll steel plates through epoxy resin in constant temperature manner; the surface of the filter casing is plated with nickel; the filter circuits are A, U, D and F type filter circuits; and the protection circuit includes that TVS pipes are respectively installed on wire-wire and wire-ground of an input end of each filter circuit to form a wire-wire and wire-ground transient protection module. The transient prevention and stable state combined interference power supply filter has fine common mode and difference mode filtering performances, can simultaneously effectively restrain surge interference on a power supply wire, and is particularly applicable to various types of direct-current electronic devices with higher requirements on CS116.

Description

Anti-transient state and stable state combination interference power-supply filter
Technical field
The utility model relates to a kind of power-supply filter, belongs to power filter, resist technology, specifically anti-transient state and stable state combination interference power-supply filter.
Background technology
On electronic equipment power source, both there had been various external electromagnetic interference, the electromagnetic interference that is produced when also existing self to work.These electromagnetic interference, the mode by conduction and radiation affects the electronic equipment that moves in this environment.These disturb and mainly are divided into two classes: a class is because the stable state that switching tube work is produced is disturbed, and another kind of is that the surge that is produced when bulk loads is turn-offed in the electrical network disturbs.Disturb for suppressing this two class simultaneously, then on the basis that possesses good stable state codan, also need to suppress the power-supply filter that the power line surge disturbs.Because existing filter mostly is stationary filter greatly, the interference of power supply stable state can only be suppressed, and the surge interference of power supply can not be suppressed simultaneously, disturb the occasion that suppresses to satisfying transient state and stable state simultaneously usually, need install the transient protective device additional at the filter front end.For the limited electronic equipment in inner space, volume is excessive on the one hand, on the other hand because the distributed constant of interconnection structure causes performance to be subjected to very big influence.
Summary of the invention
The purpose of this utility model provides a kind of except having good common mode and differential mode filtering performance, also the surge that can effectively suppress simultaneously on the power line disturbs, and is particularly useful for the anti-transient state and the stable state combination interference power-supply filter of all kinds of DC electronic equipment that CS116 is had relatively high expectations.
To achieve these goals, the technical solution of the utility model is: anti-transient state and stable state combination interference power-supply filter is characterized in that: comprise protective circuit and filter circuit at least, wherein protective circuit is connected with the filter circuit serial connection; Filter circuit is packaged in the filter shell of being made by cold-rolled steel sheet of plating nickel on surface by epoxy resin constant temperature.
Described filter circuit is A, U, D, F type filter circuit.
Described protective circuit is that the TVS pipe is installed respectively in the line-line of filter circuit input, line-ground, thereby forms line-line, line-ground transient protective module.
Described A circuit is to comprise a common mode inductance L 1, a differential mode capacitor CX, two filter circuits that common mode capacitance CY is formed.Common mode inductance L 1Be connected electrically in the protective circuit output, a differential mode capacitor CX is connected in parallel on L 1Input; Two common mode capacitance CY are located at two L respectively 1On the L ' of output, the N ', and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm.
Described U circuit is to comprise a bleeder resistance, a common mode inductance L 1, four common mode capacitance CY, two differential mode inductance L 2, three filter circuits that differential mode capacitor CX is formed.Bleeder resistance is connected in parallel between the L and N of filter circuit input; Common mode inductance L 1Be connected electrically in the protective circuit output; A differential mode capacitor CX is connected in parallel on L 1Input; A differential mode capacitor is connected in parallel on L 1On output L ', the N '; Two common mode capacitance CY are connected on common mode inductance output L ', the N ', and link to each other over the ground, and electric capacity two ends pin length is between 0.3mm～0.6mm; Two differential mode inductance L 2Be connected L 1Output, and contact with L, N respectively; A differential mode capacitor CX is connected in parallel on two L 2Between the L ' of output, the N '; Two common mode capacitance CY are located at two L respectively 2On the L ' of output, the N ', and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm.
Described D circuit is to comprise two common mode inductance L 1, two differential mode capacitor CX, four filter circuits that common mode capacitance CY is formed.Two common mode inductance L 1Be connected electrically in the protective circuit output, a differential mode capacitor CX is connected in parallel on L 1Input; Two L 1Between respectively two common mode capacitance CY are connected on L, the N, and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; A differential mode capacitor CX is connected in parallel on two L 1Between the L ' of output, the N '; Two common mode capacitance CY are located at two L respectively 1On the L ' of output, the N ', and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm.
Described F circuit is to comprise two common mode inductance L 1, four common mode capacitance CY, two differential mode inductance L 2, two filter circuits that differential mode capacitor CX is formed.Two common mode inductance L 1Be connected electrically in the protective circuit output, a differential mode capacitor CX is connected in parallel on L 1Input; Two L 1Between respectively two common mode capacitance CY are connected on L, the N, and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Two differential mode inductance L 2Be connected L 1Output, and contact with L, N respectively; A differential mode capacitor CX is connected in parallel on two L 2Between the L ' of output, the N '; Two common mode capacitance CY are located at two L respectively 2On the L ' of output, the N ', and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm.
Before line-line, the line-ground protection module that TVS pipe is formed is serially connected in the input of electric source filter circuit; when on power line, producing the transient peak interference; this protection module suppresses spike at the filter circuit input rapidly to be disturbed; making it become stable state disturbs; after altogether, the whole filtering of differential mode filter circuit, finally reach the purpose of equipment operate as normal.The utlity model has that volume is little, response speed is fast, defencive function is perfect, insert the high characteristics of loss.Be applicable to the power line filtering of equipment and the absorption that surge voltage is disturbed.
Description of drawings
Fig. 1 is the Transient Interference circuit that highly sensitive TVS Transient Suppression Diode is formed;
Fig. 2 is anti-transient state and the stable state combination interference power-supply filter first embodiment circuit;
Fig. 3 is anti-transient state and the stable state combination interference power-supply filter second embodiment circuit;
Fig. 4 is anti-transient state and stable state combination interference power-supply filter the 3rd embodiment circuit;
Fig. 5 is anti-transient state and stable state combination interference power-supply filter the 4th embodiment circuit.
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify the utility model and how to realize.
As shown in Figure 1, high strength, highly sensitive TVS pipe are installed in the filter circuit input, distinguish (line-ground) continuous high sensitivity TVS2 that intensity is higher over the ground on L, N, and TVS pipe two ends pin length is between 0.3mm～0.6mm; (the TVS pipe strength ratio TVS pipe that line-ground is installed that general line-line is installed is lower slightly, specifically can decide according to requirement of withstand voltage for a high sensitivity TVS1 in parallel between L, N (line-line).); The intensity of TVS pipe is at 1.5KE100CA～1.5KE800CA (intensity can be selected according to actual working environment); More than 3 TVS pipe form line-line, line-ground transient protective module.
Embodiment 1: as shown in Figure 2, anti-transient state and stable state combination interference power-supply filter filter circuit include a common mode inductance L 1, differential mode capacitor CX, two common mode capacitance CY, it is characterized in that, also be provided with three high strength, highly sensitive TVS pipe at the power-supply filter input.Particular circuit configurations is: high strength, highly sensitive TVS pipe is filter input end, (line-ground) high sensitivity TVS pipe that intensity is higher that links to each other over the ground respectively on L, N, and TVS pipe two ends pin length is between 0.3mm～0.6mm; (the TVS pipe strength ratio TVS pipe that line-ground is installed of general line line installation is lower slightly, specifically can decide according to requirement of withstand voltage for high sensitivity TVS pipe in parallel between L, N (line-line).); The intensity of TVS pipe is at 1.5KE100CA～1.5KE800CA (intensity can be selected according to actual working environment); More than 3 TVS pipe form line-line, line-ground transient protective module; Common mode inductance L 1Be connected in series after this module, differential mode capacitor CX is connected in parallel on L 1Between the L of input, the N; Two common mode capacitance CY are located at L respectively 1On the L ' of output, the N ', link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm.The used filtering device of this type of circuit is few, in anti-glitch, common mode disturbances is had stronger inhibitory action.
Embodiment 2: as shown in Figure 3, anti-transient state and stable state combination interference power-supply filter filter circuit include a common mode inductance L 1, two differential mode inductance L 2, three differential mode capacitor CX, four common mode capacitance CY, it is characterized in that, also be provided with three high strength, highly sensitive TVS pipe at the power-supply filter input.Particular circuit configurations is: high strength, highly sensitive TVS pipe is filter input end, (line-ground) high sensitivity TVS pipe that intensity is higher that links to each other over the ground respectively on L, N, and TVS pipe two ends pin length is between 0.3mm～0.6mm; (the TVS pipe strength ratio TVS pipe that line-ground is installed that general line-line is installed is lower slightly, specifically can decide according to requirement of withstand voltage for high sensitivity TVS pipe in parallel between L, N (line-line).); The intensity of TVS pipe is at 1.5KE100CA～1.5KE800CA (intensity can be selected according to actual working environment); More than 3 TVS pipe form line-line, line-ground transient protective module; Common mode inductance L 1After being connected in series this module, two differential mode capacitor CX one in front and one in back are connected in parallel on L respectively 1Between the L of input and output, the N; Two common mode capacitance CY are located at L respectively 1On the L ' of output, the N ', link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Two differential mode inductance L 2Be serially connected in L respectively 1Output; Differential mode capacitor CX is connected in parallel on two L 2Between the L ' of output, the N '; Two common mode capacitance CY are located at two L respectively 2On the L ' of output, the N ', link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Be in security consideration,, accelerate self-discharge speed if operating current is higher than 3A bleeder resistance can be between filter circuit input L, N in parallel.This type of circuit has stronger inhibitory action for common mode and differential mode interference in anti-glitch.
Embodiment 3: as shown in Figure 4, anti-transient state and stable state combination interference power-supply filter filter circuit include two common mode inductance L 1, two differential mode capacitor CX, four common mode capacitance CY, it is characterized in that, also be provided with three high strength, highly sensitive TVS pipe at the power-supply filter input.Particular circuit configurations is: high strength, highly sensitive TVS pipe is filter input end, (line-ground) high sensitivity TVS pipe that intensity is higher that links to each other over the ground respectively on L, N, and TVS pipe two ends pin length is between 0.3mm～0.6mm; (the TVS pipe strength ratio TVS pipe that line-ground is installed of general line line installation is lower slightly, specifically can decide according to requirement of withstand voltage for high sensitivity TVS pipe in parallel between L, N (line-line).); The intensity of TVS pipe is at 1.5KE100CA～1.5KE800CA (intensity can be selected according to actual working environment); More than 3 TVS pipe form line-line, line-ground transient protective module; Two common mode inductance L 1After this module of tandem connection, differential mode capacitor CX is connected in parallel on L 1Input; Two L 1Between respectively two common mode capacitance CY are located on L, the N, link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Differential mode capacitor CX is connected in parallel on two L 1Between the L ' of output, the N '; Two common mode capacitance CY are located at two L respectively 1On the L ' of output, the N ', link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Be in security consideration,, accelerate self-discharge speed if operating current is higher than 3A bleeder resistance can be between filter circuit input L, N in parallel.The used filtering device of this type of circuit is few, in anti-glitch, for common mode disturbances extremely strong inhibitory action is arranged.
Embodiment 4: as shown in Figure 5, anti-transient state and stable state combination interference power-supply filter filter circuit include two common mode inductance L 1, two differential mode inductance L 2, two differential mode capacitor CX, four common mode capacitance CY, it is characterized in that, also be provided with three high strength, highly sensitive TVS pipe at the power-supply filter input.Particular circuit configurations is: high strength, highly sensitive TVS pipe is filter input end, (line-ground) high sensitivity TVS pipe that intensity is higher that links to each other over the ground respectively on L, N, and TVS pipe two ends pin length is between 0.3mm～0.6mm; (the TVS pipe strength ratio TVS pipe that line-ground is installed of general line line installation is lower slightly, specifically can decide according to requirement of withstand voltage for high sensitivity TVS pipe in parallel between L, N (line-line).); The intensity of TVS pipe is at 1.5KE100CA～1.5KE800CA (intensity can be selected according to actual working environment); More than 3 TVS pipe form line-line, line-ground transient protective module; Two common mode inductance L 1After being connected in series this module, differential mode capacitor CX is connected in parallel on L 1Between the L of input, the N; Two common mode capacitance CY are located at two L respectively 1Between L, N on, link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Two differential mode inductance L 2Be serially connected in two L respectively 1Output; Differential mode capacitor CX is connected in parallel on two L 2Between the L ' of output, the N '; Two common mode capacitance CY are located at two L respectively 2On the L ' of output, the N ', link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Be in security consideration,, accelerate self-discharge speed if operating current is higher than 3A bleeder resistance can be between filter circuit input L, N in parallel.This type of circuit has extremely strong inhibitory action for common mode and differential mode interference in anti-glitch.

Claims (1)

1. anti-transient state and stable state combination interference power-supply filter is characterized in that: comprise protective circuit and filter circuit at least, wherein protective circuit is connected with the filter circuit serial connection; Filter circuit is packaged in the filter shell of being made by cold-rolled steel sheet of plating nickel on surface by epoxy resin constant temperature;
Described filter circuit is A, U, D, F type filter circuit;
Described protective circuit is that line line, the line at the filter circuit input installed the TVS pipe on the ground respectively, thereby forms line line, line ground transient protective module;
Described A circuit is to comprise a common mode inductance L1, a differential mode capacitor CX, two filter circuits that common mode capacitance CY is formed, and common mode inductance L1 is connected electrically in the protective circuit output, and a differential mode capacitor CX is connected in parallel on the L1 input; Two common mode capacitance CY are located at respectively on L ', the N ' of two L1 outputs, and link to each other over the ground, and electric capacity two ends pin length is between 0.3mm～0.6mm;
Described U circuit is to comprise a bleeder resistance, common mode inductance L1, four common mode capacitance CY, two differential mode inductance L2, three filter circuits that differential mode capacitor CX is formed, and bleeder resistance is connected in parallel between the L and N of filter circuit input; Common mode inductance L1 is connected electrically in the protective circuit output; A differential mode capacitor CX is connected in parallel on the L1 input; A differential mode capacitor is connected in parallel on L1 output L ', the N '; Two common mode capacitance CY are connected on common mode inductance output L ', the N ', and link to each other over the ground, and electric capacity two ends pin length is between 0.3mm～0.6mm; Two differential mode inductance L2 are connected the L1 output, and contact with L, N respectively; A differential mode capacitor CX is connected in parallel between L ', the N ' of two L2 outputs; Two common mode capacitance CY are located at respectively on L ', the N ' of two L2 outputs, and link to each other over the ground, and electric capacity two ends pin length is between 0.3mm～0.6mm;
Described D circuit is to comprise two common mode inductance L1, two differential mode capacitor CX, four filter circuits that common mode capacitance CY is formed, and two common mode inductance L1 are connected electrically in the protective circuit output, and a differential mode capacitor CX is connected in parallel on the L1 input; Respectively two common mode capacitance CY are connected on L, the N between two L1, and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; A differential mode capacitor CX is connected in parallel between L ', the N ' of two L1 outputs; Two common mode capacitance CY are located at respectively on L ', the N ' of two L1 outputs, and link to each other over the ground, and electric capacity two ends pin length is between 0.3mm～0.6mm;
Described F circuit is to comprise two common mode inductance L1, four common mode capacitance CY, two differential mode inductance L2, two filter circuits that differential mode capacitor CX is formed, two common mode inductance L1 are connected electrically in the protective circuit output, and a differential mode capacitor CX is connected in parallel on the L1 input; Respectively two common mode capacitance CY are connected on L, the N between two L1, and link to each other over the ground, electric capacity two ends pin length is between 0.3mm～0.6mm; Two differential mode inductance L2 are connected the L1 output, and contact with L, N respectively; A differential mode capacitor CX is connected in parallel between L ', the N ' of two L2 outputs; Two common mode capacitance CY are located at respectively on L ', the N ' of two L2 outputs, and link to each other over the ground, and electric capacity two ends pin length is between 0.3mm～0.6mm.
CN2009203192489U 2009-12-31 2009-12-31 Transient prevention and stable state combined interference power supply filter Expired - Lifetime CN201616675U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103810831A (en) * 2012-11-13 2014-05-21 中国科学院沈阳自动化研究所 Data transmission device applied to power information acquisition
CN105406695A (en) * 2014-08-27 2016-03-16 华为技术有限公司 Switch power filtering circuit
CN106712482A (en) * 2017-02-14 2017-05-24 中钢集团马鞍山矿山研究院有限公司 Anti-thunder and input polarity automatic adjusting electric current loop interface adapter
CN111413818A (en) * 2020-03-31 2020-07-14 精电(河源)显示技术有限公司 Liquid crystal display module capable of resisting electrical interference

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103810831A (en) * 2012-11-13 2014-05-21 中国科学院沈阳自动化研究所 Data transmission device applied to power information acquisition
CN105406695A (en) * 2014-08-27 2016-03-16 华为技术有限公司 Switch power filtering circuit
CN105406695B (en) * 2014-08-27 2018-03-16 华为技术有限公司 A kind of Switching Power Supply filter circuit
CN106712482A (en) * 2017-02-14 2017-05-24 中钢集团马鞍山矿山研究院有限公司 Anti-thunder and input polarity automatic adjusting electric current loop interface adapter
CN111413818A (en) * 2020-03-31 2020-07-14 精电(河源)显示技术有限公司 Liquid crystal display module capable of resisting electrical interference
CN111413818B (en) * 2020-03-31 2021-02-02 精电(河源)显示技术有限公司 Liquid crystal display module capable of resisting electrical interference

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Granted publication date: 20101027