CN203377597U - Filtering protection circuit - Google Patents
Filtering protection circuit Download PDFInfo
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- CN203377597U CN203377597U CN201320352811.9U CN201320352811U CN203377597U CN 203377597 U CN203377597 U CN 203377597U CN 201320352811 U CN201320352811 U CN 201320352811U CN 203377597 U CN203377597 U CN 203377597U
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- common mode
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Abstract
The utility model relates to a filtering protection circuit comprising a group of differential mode inductors L1 and L2, two levels of common mode inductors L3 and L4, a differential mode capacitor group, and a common mode capacitor group. One ends of the differential mode inductors L1 and L2 are respectively connected with two power supply input terminals; the other ends are respectively connected with two coils of the first-level common mode inductor L3; the two coils of the first-level common mode inductor L3 are respectively connected with two coils of the second-level common mode inductor L4; and two coils of the second-level common mode inductor L4 are respectively connected with two power supply output terminals. Besides, the differential mode capacitor group is connected in parallel between two power lines; and two ends of the common mode capacitor group are respectively connected with the two power lines. With the filtering protection circuit, the direct current qualities are improved; the EMC standard is met; and all devices of the power supply output terminals are protected.
Description
Technical field
The utility model relates to a kind of circuit, particularly a kind of filter protective circuit.
Background technology
On the power electronic equipment power supply, have various interference signals.A lot of electronic equipments itself, completing its function simultaneously, also produced panoramic electromagnetic interference, and the electromagnetic interference of artificial and the Nature.These electromagnetic interference, the mode by conduction and radiation, affect the electronic equipment moved in this environment.
For the power product with DC link, DC loop can produce very serious electromagnetic interference problem, comprising conduction interference voltage, pollutes the electromagnetic environment of periphery and electrical network, can cause a lot of harm when serious, need to adopt Electromagnetic Interference Suppressing Techniques for this reason.
The utility model content
The utility model main purpose is to address the above problem and is not enough, and a kind of direct current input filter is provided, and reduces the direct current pulsation, after filtering, is level and smooth direct current, meets the filter protective circuit of EMC standard.
For achieving the above object, the technical solution of the utility model is:
A kind of filter protective circuit, comprise one group of differential mode inductance L1, L2, two-stage common mode inductance L3, L4, the differential mode capacitor group, the common mode capacitance group, described differential mode inductance L1, L2 mono-end is connected with two power inputs respectively, the other end is connected with two coils of one-level common mode inductance L3 respectively, two coils of described one-level common mode inductance L3 are connected with two coils of secondary common mode inductance L4 respectively, two coils of secondary common mode inductance L4 are connected with two power output ends respectively, described differential mode capacitor group is connected in parallel between two power lines, the two ends of described common mode capacitance group are connected with two power lines respectively.
Further, the common mode capacitance group comprises the first capacitance group and the second capacitance group, described the first capacitance group comprises three common mode capacitance CY1, CY2, CY3, described the second capacitance group comprises three common mode capacitance CY4, CY5, CY6, three described common mode capacitance CY1, CY2, the CY3 parallel connection, three described common mode capacitance CY4, CY5, the CY6 parallel connection, described common mode capacitance CY1, CY2, an end after the CY3 parallel connection is connected with a power line, the other end and common mode capacitor C Y4, CY5, an end after the CY6 parallel connection connects, described common mode capacitance CY4, CY5, the other end after the CY6 parallel connection is connected with another power line.
Further, the common end grounding of common mode capacitance CY1, CY2, CY3 and common mode capacitor C Y4, CY5, CY6.
Further, the differential mode capacitor group comprises level Four differential mode capacitor CX1, CX2, CX3, CX4, between described differential mode inductance L1, L2 and one-level common mode inductance L3, first order differential mode capacitor CX1 is set, the second level, three grades of differential mode capacitor C X2, CX3 are set between described two-stage common mode inductance L3, L4, fourth stage differential mode capacitor CX4 is set between described secondary common mode inductance L4 and power output end.
Further, be provided with piezo-resistance between described first order differential mode capacitor CX1 and described one-level common mode inductance L3, described piezo-resistance has three, a piezo-resistance VSR1 is connected in parallel between two power lines, another two piezo-resistance VSR2, VSR3 are connected in parallel on respectively between two power lines and earth connection, the discharge tube of connecting between another two described piezo-resistance VSR2, VSR3 and earth connection.
Further, between the described second level, three grades of differential mode capacitor C X2, CX3, be provided with the transient diode module, described transient diode module is connected between two power lines.
Further, the transient diode module comprises two transient diode ZD1, ZD2 and resistance R 1, described two transient diode ZD1, ZD2 and resistance R 1 series connection.
Further, between the described second level, three grades of differential mode capacitor C X2, CX3, be provided with discharge resistance, described discharge resistance comprises two resistance R 2, R3, after described two resistance R 2, R3 series connection, is connected in parallel between two power lines.
Further, between described fourth stage differential mode capacitor CX4 and described two power output ends, two electrochemical capacitor modules are set, each described electrochemical capacitor module is connected in parallel between two power lines, each described electrochemical capacitor module is composed in series by two electrochemical capacitors and two resistance, a resistance in parallel on each electrochemical capacitor.
Content to sum up, a kind of filter protective circuit described in the utility model, by differential mode inductance, common mode inductance, differential mode capacitor, common mode capacitance, electrochemical capacitor etc., reduced galvanic pulsation.By transient diode, removed high frequency spike.By filter protective circuit, improved galvanic quality, reach the EMC standard, protected each device of power output end.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:
As shown in Figure 1, a kind of filter protective circuit, be mainly used in the locomotive circuit system.Comprise one group of differential mode inductance L1, L2, two-stage common mode inductance L3, L4, level Four differential mode capacitor CX1, CX2, CX3, CX4, common mode capacitance group, piezo-resistance module, transient diode module, electrochemical capacitor module, discharge resistance module.Two power inputs are respectively positive and negative DC600V.
Differential mode inductance L1, L2 mono-end are connected with two power inputs respectively, and the other end is connected with two coils of one-level common mode inductance L3 respectively.Specifically, differential mode inductance L1 mono-end is connected with the positive supply of two power inputs, the other end is connected with a coil of common mode inductance L 3, and differential mode inductance L2 mono-end is connected with the negative supply of two power inputs, and the other end is connected with another coil of common mode inductance L 3.Differential mode inductance L1, L2 only have when direct current suddenlys change and just work, and better reduce the impact to circuit.
Two coils of one-level common mode inductance L3 are connected with two coils of secondary common mode inductance L4 respectively.Two coils of secondary common mode inductance L4 are connected with two power output ends respectively, connect respectively positive supply output and negative supply output.Two-stage common mode inductance L3, L4 remove the common mode high-frequency interferencing signal.
Between differential mode inductance L1, L2 and one-level common mode inductance L3, first order differential mode capacitor CX1 is set, the second level, three grades of differential mode capacitor C X2, CX3 are set between two-stage common mode inductance L3, L4, fourth stage differential mode capacitor CX4 is set between secondary common mode inductance L4 and power output end, and level Four differential mode capacitor CX1, CX2, CX3, CX4 all are connected in parallel between two power lines.Level Four differential mode capacitor CX1, CX2, CX3, CX4 are mainly used in removing the differential mode interference signal.
The two ends of common mode capacitance group are connected with two power lines respectively.Specifically, the common mode capacitance group comprises the first capacitance group and the second capacitance group, the first capacitance group and the series connection of the second capacitance group, the first capacitance group comprises three common mode capacitance CY1, CY2, CY3, the second capacitance group comprises three common mode capacitance CY4, CY5, CY6, common mode capacitance CY1, CY2, CY3 parallel connection, common mode capacitance CY4, CY5, CY6 parallel connection.Common mode capacitance CY4, the CY5 of the common mode capacitance CY4 of three parallel connections, CY5, CY6 and three parallel connections, CY6 series connection, an end after common mode capacitance CY1, CY2, CY3 parallel connection is connected with the negative supply power line, the other end is connected with the end after common mode capacitor C Y4, CY5, CY6 parallel connection, and the other end after common mode capacitance CY4, CY5, CY6 parallel connection is connected with the positive supply power line.The common port of common mode capacitance CY1, CY2, CY3 and common mode capacitor C Y4, CY5, CY6, i.e. tie point ground connection after the series connection.
Level Four differential mode capacitor CX1, CX2, CX3, CX4, six common mode capacitance CY1, CY2, CY3, CY4, CY5, CY6 are safety electric capacity.Level Four differential mode capacitor CX1, CX2, CX3, CX4 are X electric capacity; Six common mode capacitance CY1, CY2, CY3, CY4, CY5, CY6 are Y electric capacity.
Be provided with piezo-resistance between first order differential mode capacitor CX1 and one-level common mode inductance L3, piezo-resistance has three, and a piezo-resistance VSR1 is connected in parallel on two power lines, between the positive-negative power line.Another two piezo-resistance VSR2, VSR3 are connected in parallel on respectively between two power lines and earth connection, and piezo-resistance VSR2 is connected in parallel between negative power line and earth connection, and piezo-resistance VSR3 is connected in parallel between positive power line and earth connection.The discharge tube of connecting between two piezo-resistance VSR2, VSR3 and earth connection.
Be provided with the transient diode module between the second level, three grades of differential mode capacitor C X2, CX3, the transient diode module is connected between two power lines.The transient diode module comprises two transient diode ZD1, ZD2 and resistance R 1, two transient diode ZD1, ZD2 and resistance R 1 series connection.The transient diode module is mainly used in eliminating the fast pulse spike of reaction speed, and connect two transient diode ZD1, ZD2 increase the clamp voltage value, and series resistance R1 plays metering function, also can protect transient diode ZD1, ZD2.
Between fourth stage differential mode capacitor CX4 and two power output ends, two electrochemical capacitor modules are set, each electrochemical capacitor module comprises two electrochemical capacitor E1, E2(E3, E4), two electrochemical capacitor E1, E2(E3, E4) series connection, series connection electrolysis electric capacity E1, E2(E3, E4) be mainly the increase withstand voltage, at two electrochemical capacitor E1, E2(E3, E4) upper in two resistance R 4 of series connection, R5(R8, R9), two resistance R 4 of connecting, R5(R8, R9) be convenient to protection electrochemical capacitor E1 when supply voltage sudden change, E2(E3, E4), and bear a part of power consumption, two electrochemical capacitor E1, E2(E3, E4) two resistance R 4 of connecting, R5(R8, R9) rear and positive-negative power line parallel.
A resistance, wherein electrochemical capacitor E1 parallel resistance R6 in parallel on each electrochemical capacitor; Electrochemical capacitor E2 parallel resistance R7; Electrochemical capacitor E3 parallel resistance R10; Electrochemical capacitor E4 parallel resistance R11, parallel resistance makes electrochemical capacitor keep all pressing, and makes voltage more stable, has also protected electrochemical capacitor, is unlikely to exceed the withstand voltage of itself simultaneously.
Be provided with discharge resistance between the second level, three grades of differential mode capacitor C X2, CX3, discharge resistance comprises two resistance R 2, R3, after two resistance R 2, R3 series connection, be connected in parallel between two power lines, when discharge resistance being set making power down, electrochemical capacitor can pass through resistance R 2, R3 is anti-electric.
As mentioned above, given scheme content, can derive similar technical scheme by reference to the accompanying drawings.In every case be the content that does not break away from technical solutions of the utility model, any simple modification, equivalent variations and the modification above embodiment done according to technical spirit of the present utility model, all still belong in the scope of technical solutions of the utility model.
Claims (9)
1. a filter protective circuit, it is characterized in that: comprise one group of differential mode inductance L1, L2, two-stage common mode inductance L3, L4, the differential mode capacitor group, the common mode capacitance group, described differential mode inductance L1, L2 mono-end is connected with two power inputs respectively, the other end is connected with two coils of one-level common mode inductance L3 respectively, two coils of described one-level common mode inductance L3 are connected with two coils of secondary common mode inductance L4 respectively, two coils of secondary common mode inductance L4 are connected with two power output ends respectively, described differential mode capacitor group is connected in parallel between two power lines, the two ends of described common mode capacitance group are connected with two power lines respectively.
2. a kind of filter protective circuit according to claim 1, it is characterized in that: described common mode capacitance group comprises the first capacitance group and the second capacitance group, described the first capacitance group comprises three common mode capacitance CY1, CY2, CY3, described the second capacitance group comprises three common mode capacitance CY4, CY5, CY6, three described common mode capacitance CY1, CY2, the CY3 parallel connection, three described common mode capacitance CY4, CY5, the CY6 parallel connection, described common mode capacitance CY1, CY2, an end after the CY3 parallel connection is connected with a power line, the other end and common mode capacitor C Y4, CY5, an end after the CY6 parallel connection connects, described common mode capacitance CY4, CY5, the other end after the CY6 parallel connection is connected with another power line.
3. a kind of filter protective circuit according to claim 2, is characterized in that: the common end grounding of described common mode capacitance CY1, CY2, CY3 and common mode capacitor C Y4, CY5, CY6.
4. a kind of filter protective circuit according to claim 1; it is characterized in that: described differential mode capacitor group comprises level Four differential mode capacitor CX1, CX2, CX3, CX4; between described differential mode inductance L1, L2 and one-level common mode inductance L3, first order differential mode capacitor CX1 is set; the second level, three grades of differential mode capacitor C X2, CX3 are set between described two-stage common mode inductance L3, L4, fourth stage differential mode capacitor CX4 is set between described secondary common mode inductance L4 and power output end.
5. a kind of filter protective circuit according to claim 4; it is characterized in that: between described first order differential mode capacitor CX1 and described one-level common mode inductance L3, be provided with piezo-resistance; described piezo-resistance has three; a piezo-resistance VSR1 is connected in parallel between two power lines; another two piezo-resistance VSR2, VSR3 are connected in parallel on respectively between two power lines and earth connection, the discharge tube of connecting between another two described piezo-resistance VSR2, VSR3 and earth connection.
6. a kind of filter protective circuit according to claim 4, it is characterized in that: be provided with the transient diode module between the described second level, three grades of differential mode capacitor C X2, CX3, described transient diode module is connected between two power lines.
7. a kind of filter protective circuit according to claim 6, it is characterized in that: described transient diode module comprises two transient diode ZD1, ZD2 and resistance R 1, described two transient diode ZD1, ZD2 and resistance R 1 series connection.
8. a kind of filter protective circuit according to claim 4; it is characterized in that: between the described second level, three grades of differential mode capacitor C X2, CX3, be provided with discharge resistance; described discharge resistance comprises two resistance R 2, R3, after described two resistance R 2, R3 series connection, is connected in parallel between two power lines.
9. a kind of filter protective circuit according to claim 4; it is characterized in that: between described fourth stage differential mode capacitor CX4 and described two power output ends, two electrochemical capacitor modules are set; each described electrochemical capacitor module is connected in parallel between two power lines; each described electrochemical capacitor module is composed in series by two electrochemical capacitors and two resistance, a resistance in parallel on each electrochemical capacitor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320352811.9U CN203377597U (en) | 2013-06-19 | 2013-06-19 | Filtering protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320352811.9U CN203377597U (en) | 2013-06-19 | 2013-06-19 | Filtering protection circuit |
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| CN203377597U true CN203377597U (en) | 2014-01-01 |
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| CN201320352811.9U Expired - Lifetime CN203377597U (en) | 2013-06-19 | 2013-06-19 | Filtering protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106067725A (en) * | 2016-07-21 | 2016-11-02 | 江西泰豪军工集团有限公司 | A kind of power-supply filter suppressing short wave communication frequency band speech to disturb |
| CN110212742A (en) * | 2019-06-20 | 2019-09-06 | 北京元六鸿远电子科技股份有限公司 | A kind of DC wave filter not generating great start-up current |
-
2013
- 2013-06-19 CN CN201320352811.9U patent/CN203377597U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106067725A (en) * | 2016-07-21 | 2016-11-02 | 江西泰豪军工集团有限公司 | A kind of power-supply filter suppressing short wave communication frequency band speech to disturb |
| CN110212742A (en) * | 2019-06-20 | 2019-09-06 | 北京元六鸿远电子科技股份有限公司 | A kind of DC wave filter not generating great start-up current |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
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| CX01 | Expiry of patent term |