CN112865057A - Electromagnetic protection circuit - Google Patents
Electromagnetic protection circuit Download PDFInfo
- Publication number
- CN112865057A CN112865057A CN202110293964.XA CN202110293964A CN112865057A CN 112865057 A CN112865057 A CN 112865057A CN 202110293964 A CN202110293964 A CN 202110293964A CN 112865057 A CN112865057 A CN 112865057A
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- resistor
- protection unit
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- lemp
- protection
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- 101001132883 Homo sapiens Mitoregulin Proteins 0.000 claims abstract description 63
- 102100033799 Mitoregulin Human genes 0.000 claims abstract description 63
- 239000003990 capacitor Substances 0.000 claims description 43
- 230000005611 electricity Effects 0.000 claims description 21
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
Abstract
The invention relates to the technical field of electromagnetic protection circuits, in particular to an electromagnetic protection circuit, which comprises a first LEMP protection unit, a NEMP protection unit and a second LEMP protection unit which are electrically connected in sequence, wherein the input end of the first LEMP protection unit is respectively and electrically connected with a zero line and a live line, the second LEMP protection unit is electrically connected with the input end of an external protected system, high-performance filtering is realized by arranging the NEMP protection unit, and the electromagnetic protection circuit has high-reliability functions of resisting electromagnetic pulse attack and nuclear electromagnetic pulse attack generated by human; the first LEMP protection unit and the second LEMP protection unit are arranged, so that the power supply protection system has a high-reliability function of resisting natural lightning electromagnetic pulse attack; the scheme performs lightning protection and electromagnetic protection on the power supply system through the cooperation among the NEMP protection unit, the first LEMP protection unit and the second LEMP protection unit, and realizes intelligent management.
Description
Technical Field
The invention relates to the technical field of electromagnetic protection circuits, in particular to an electromagnetic protection circuit.
Background
The existing power protection usually adopts circuit safety protection elements such as a surge protector and a fuse, and has poor systematicness and single function.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the electromagnetic protection circuit is used for performing lightning protection and electromagnetic protection on a power supply system and realizing intelligent management.
In order to solve the technical problems, the invention adopts the technical scheme that:
the utility model provides an electromagnetic protection circuit, includes first LEMP protection element, NEMP protection element and the second LEMP protection element that electricity connects in proper order, first LEMP protection element's input is connected with zero line and live wire electricity respectively, second LEMP protection element is connected with the external input electricity by protection system.
The invention has the beneficial effects that:
the NEMP protection unit is arranged to realize high-performance filtering, and the high-reliability anti-human electromagnetic pulse attack and nuclear electromagnetic pulse attack function is realized; the first LEMP protection unit and the second LEMP protection unit are arranged, so that the power supply protection system has a high-reliability function of resisting natural lightning electromagnetic pulse attack; the scheme performs lightning protection and electromagnetic protection on the power supply system through the cooperation among the NEMP protection unit, the first LEMP protection unit and the second LEMP protection unit, and realizes intelligent management.
Drawings
FIG. 1 is a schematic circuit diagram of an electromagnetic protection circuit according to the present invention;
description of reference numerals:
1. a NEMP guard unit; 2. a first LEMP protection unit; 3. a second LEMP guard unit.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1, a technical solution provided by the present invention:
the utility model provides an electromagnetic protection circuit, includes first LEMP protection element, NEMP protection element and the second LEMP protection element that electricity connects in proper order, first LEMP protection element's input is connected with zero line and live wire electricity respectively, second LEMP protection element is connected with the external input electricity by protection system.
From the above description, the beneficial effects of the present invention are:
the NEMP protection unit is arranged to realize high-performance filtering, and the high-reliability anti-human electromagnetic pulse attack and nuclear electromagnetic pulse attack function is realized; the first LEMP protection unit and the second LEMP protection unit are arranged, so that the power supply protection system has a high-reliability function of resisting natural lightning electromagnetic pulse attack; the scheme performs lightning protection and electromagnetic protection on the power supply system through the cooperation among the NEMP protection unit, the first LEMP protection unit and the second LEMP protection unit, and realizes intelligent management.
Further, first LEMP protection unit includes resistance RV1, resistance RV2 and resistance RV3, resistance RV 3's one end respectively with resistance RV 1's one end, NEMP protection unit and live wire electricity are connected, resistance RV 3's the other end is connected with resistance RV 2's one end electricity and resistance RV 3's the other end and resistance RV 2's one end all ground connection, resistance RV 2's the other end respectively with resistance RV1 the other end and NEMP protection unit and zero line electricity are connected.
As can be seen from the above description, the common mode of the resistor RV1 and the resistor RV2 and the resistor RV3 discharges the lightning electromagnetic pulse at the power inlet end to the ground, so that the high voltage generated by the lightning electromagnetic pulse is limited to be less than the rated value of the protected power system, and the omnibearing protection is realized at the power inlet end.
Further, the resistor RV1, the resistor RV2 and the resistor RV3 are all piezoresistors.
Further, the second LEMP protection unit includes a resistor RV4, a resistor RV5 and a resistor RV6, one end of the resistor RV4 is electrically connected with one end of the resistor RV6, the NEMP protection unit and the external input end of the protected system respectively, the other end of the resistor RV4 is electrically connected with one end of the resistor RV5, the other end of the resistor RV4 and one end of the resistor RV5 are all grounded, and the other end of the resistor RV5 is electrically connected with the other end of the resistor RV6, the NEMP protection unit and the external input end of the protected system respectively.
As can be seen from the above description, since the lightning electromagnetic pulse is transmitted in a long line in the NEMP protection unit to generate a long line oscillation effect, the second LEMP protection unit eliminates the overvoltage and the pulse current generated by the long line oscillation effect through the differential mode of the resistor RV6, the common mode of the resistor RV4 and the resistor RV 5.
Further, the resistor RV4, the resistor RV5 and the resistor RV6 are all piezoresistors.
Further, NEMP protection unit includes resistance R, electric capacity CX, electric capacity CY, inductance L and inductance L, electric capacity CY's one end is connected with resistance R's one end, electric capacity CX's one end and inductance L's one end electricity respectively, inductance L's the other end is connected with electric capacity CX's one end, electric capacity CY's one end and second LEMP protection unit electricity respectively, electric capacity CY's the other end is connected with electric capacity CY's one end electricity and the other end of electric capacity CY all ground connection, electric capacity CY's the other end is connected with electric capacity CX's the other end, inductance L's one end and second LEMP protection unit electricity respectively, inductance L's the other, The other end of electric capacity CX2 and one end of inductance L2 are connected electrically, the other end of inductance L2 is connected with the other end of electric capacity CX1, the other end of resistance R1, the one end and the first LEMP protection unit electricity of electric capacity CY2 respectively, the other end of electric capacity CY1 is connected electrically and the other end of electric capacity CY2 is all grounded with the other end of electric capacity CY1 and the other end of electric capacity CY2, the other end of electric capacity CY3 is connected electrically and the other end of electric capacity CY4 is also all grounded with the other end of electric capacity CY3 and the other end of electric capacity CY 4.
As can be seen from the above description, the artificial electromagnetic pulse and the nuclear electromagnetic pulse cannot be protected by the first LEMP unit with a slow response time (μ s level) due to the short wave head time (ns level), and therefore the NEMP protection unit employs two pi-type filters, which can eliminate the artificial electromagnetic pulse and the nuclear electromagnetic pulse.
Further, the input end of the first LEMP protection unit is connected with 220V alternating current.
Referring to fig. 1, a first embodiment of the present invention is:
referring to fig. 1, an electromagnetic protection circuit includes a first LEMP protection unit 2, a NEMP protection unit 1, and a second LEMP protection unit 3, which are electrically connected in sequence, wherein an input end of the first LEMP protection unit 2 is electrically connected to a zero line and a live line, respectively, and the second LEMP protection unit 3 is electrically connected to an input end of an external protected system.
The NEMP protection unit 1 can comprise a BLPF (Butterworth filter) and the like, high-performance filtering is realized, and the functions of resisting human electromagnetic pulse attacks and nuclear electromagnetic pulse attacks generated by human bodies with high reliability are achieved.
The first LEMP protection unit 2 and the second LEMP protection unit 3 have the same structure, may include an SPD (surge protector) and an SSD (special Disconnector SPD for protection after SPD), and have a highly reliable function of resisting natural lightning electromagnetic pulse attack.
Referring to fig. 1, the first LEMP protection unit 2 includes a resistor RV1 (with a resistance value of 5 Ω -5k Ω), a resistor RV2 (with a resistance value of 5 Ω -5k Ω), and a resistor RV3 (with a resistance value of 5 Ω -5k Ω), one end of the resistor RV3 is electrically connected to one end of the resistor RV1, the NEMP protection unit 1, and the live wire, the other end of the resistor RV3 is electrically connected to one end of the resistor RV2, the other end of the resistor RV3 and one end of the resistor RV2 are both grounded, and the other end of the resistor RV2 is electrically connected to the other end of the resistor RV1, the NEMP protection unit 1, and the neutral wire.
The resistor RV1, the resistor RV2 and the resistor RV3 are all piezoresistors.
Referring to fig. 1, the second LEMP protection unit 3 includes a resistor RV4 (with a resistance value of 5 Ω -5k Ω), a resistor RV5 (with a resistance value of 5 Ω -5k Ω), and a resistor RV6 (with a resistance value of 5 Ω -5k Ω), one end of the resistor RV4 is electrically connected to one end of the resistor RV6, the NEMP protection unit 1, and the input end of the external protected system, the other end of the resistor RV4 is electrically connected to one end of the resistor RV5, the other end of the resistor RV4 and one end of the resistor RV5 are both grounded, and the other end of the resistor RV5 is electrically connected to the other end of the resistor RV6, the NEMP protection unit 1, and the input end of the external protected system.
The resistor RV4, the resistor RV5 and the resistor RV6 are all piezoresistors.
Referring to fig. 1, the NEMP protection unit 1 includes a resistor R1, a capacitor CX1, a capacitor CX2, a capacitor CX3, a capacitor CY3, an inductor L3, and an inductor L3, wherein one end of the capacitor CY3 is electrically connected to one end of the resistor R3, one end of the capacitor CX3, and one end of the inductor L3, the other end of the inductor L3 is electrically connected to one end of the capacitor CX3, one end of the capacitor CY3, and one end of the inductor L3, the other end of the inductor L3 is electrically connected to one end of the capacitor CY3, and the second LEMP protection unit 3, the other end of the capacitor CY3 is electrically connected to one end of the capacitor CY3, the other end of the capacitor CY3 and one end of the capacitor CY3 are electrically connected to ground, the second end of the capacitor CY3 and the capacitor CY3, the other end of inductance L2 is connected with the one end of electric capacity CY4, the other end of electric capacity CX2 and the one end of inductance L2 electricity respectively, the other end of inductance L2 is connected with the other end of electric capacity CX1, the other end of resistance R1, the one end and the first LEMP protection unit 2 electricity of electric capacity CY2 respectively, the other end of electric capacity CY1 is connected with the other end electricity of electric capacity CY2 and the other end of electric capacity CY1 and the other end of electric capacity CY2 all ground connection, the other end of electric capacity CY3 is connected with the other end electricity of electric capacity CY4 and the other end of electric capacity CY3 and the other end of electric capacity CY4 all ground connection.
The input end of the first LEMP protection unit 2 is connected with 220V alternating current.
NEMP protection unit 1, first LEMP protection unit 2 and second LEMP protection unit 3 constitute the electromagnetic protection unit, adopt two-stage differential mode, common mode design, when first-order protection (being first LEMP protection unit 2) mainly invades to power supply entry end thunder and lightning electromagnetic pulse, discharge its impulse current transient state to ground, make thunder and lightning electromagnetic pulse produce the high voltage and restrict to being less than the rated value Uw of being protected electrical power generating system, realize all-round protection at power supply entry end. The NEMP including the artificial electromagnetic pulse and the nuclear electromagnetic pulse has a short wave head time (ns level), and the first LEMP protection unit 2 for lightning electromagnetic pulse protection has a slow response time (μ s level), so that the NEMP is not protected, and therefore, the NEMP protection unit 1 adopts two pi-type filters to eliminate invasion of the NEMP. The lightning electromagnetic pulse is transmitted in a long line in the NEMP protection unit 1 to generate a long line oscillation effect, and further the overvoltage and the pulse current generated by the long line oscillation effect are eliminated through the second-stage protection (the second LEMP protection unit 3).
In summary, the electromagnetic protection circuit provided by the present invention realizes high performance filtering by setting the NEMP protection unit, and has high reliability functions of resisting electromagnetic pulse attacks and nuclear electromagnetic pulse attacks generated by human; the first LEMP protection unit and the second LEMP protection unit are arranged, so that the power supply protection system has a high-reliability function of resisting natural lightning electromagnetic pulse attack; the scheme performs lightning protection and electromagnetic protection on the power supply system through the cooperation among the NEMP protection unit, the first LEMP protection unit and the second LEMP protection unit, and realizes intelligent management.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (7)
1. The utility model provides an electromagnetic protection circuit, its characterized in that, is including the first LEMP protection unit, NEMP protection unit and the second LEMP protection unit that connect gradually the electricity, the input of first LEMP protection unit is connected with zero line and live wire electricity respectively, second LEMP protection unit is connected with the external input electricity by protection system.
2. The electromagnetic protection circuit according to claim 1, wherein the first LEMP protection unit comprises a resistor RV1, a resistor RV2 and a resistor RV3, one end of the resistor RV3 is electrically connected with one end of the resistor RV1, the NEMP protection unit and the live wire respectively, the other end of the resistor RV3 is electrically connected with one end of the resistor RV2, the other end of the resistor RV3 and one end of the resistor RV2 are both grounded, and the other end of the resistor RV2 is electrically connected with the other end of the resistor RV1, the NEMP protection unit and the neutral wire respectively.
3. The electromagnetic protection circuit according to claim 2, wherein the resistor RV1, the resistor RV2 and the resistor RV3 are all piezoresistors.
4. The electromagnetic protection circuit according to claim 1, wherein the second LEMP protection unit includes a resistor RV4, a resistor RV5 and a resistor RV6, one end of the resistor RV4 is electrically connected to one end of the resistor RV6, the NEMP protection unit and the input end of the external protected system respectively, the other end of the resistor RV4 is electrically connected to one end of the resistor RV5, the other end of the resistor RV4 and one end of the resistor RV5 are both grounded, and the other end of the resistor RV5 is electrically connected to the other end of the resistor RV6, the NEMP protection unit and the input end of the external protected system respectively.
5. The electromagnetic protection circuit according to claim 4, wherein the resistor RV4, the resistor RV5 and the resistor RV6 are all piezoresistors.
6. The electromagnetic protection circuit according to claim 1, wherein the NEMP protection unit comprises a resistor R1, a capacitor CX1, a capacitor CX2, a capacitor CX3, a capacitor CY3, an inductor L3 and an inductor L3, one end of the capacitor CY3 is electrically connected with one end of the resistor R3, one end of the capacitor CX3 and one end of the inductor L3 respectively, the other end of the inductor L3 is electrically connected with one end of the capacitor CX3, one end of the capacitor CY3 and a second LEMP protection unit, the other end of the capacitor CY3 is electrically connected with one end of the capacitor CY3 and the other end of the capacitor CY3 are electrically connected with the first end of the capacitor CY3 and the capacitor CY3, the other end of the capacitor CY3 and the capacitor CY3 are electrically connected with the second end of the capacitor, the other end of the inductor L2 is electrically connected with one end of a capacitor CY4, the other end of a capacitor CX2 and one end of an inductor L2, the other end of the inductor L2 is electrically connected with the other end of a capacitor CX1, the other end of a resistor R1, one end of a capacitor CY2 and the first LEMP protection unit, the other end of the capacitor CY1 is electrically connected with the other end of the capacitor CY2, the other end of the capacitor CY1 and the other end of the capacitor CY2 are grounded, the other end of the capacitor CY3 is electrically connected with the other end of the capacitor CY4, and the other end of the capacitor CY3 and the other end of the capacitor CY4 are grounded.
7. The circuit of claim 1, wherein the input of the first LEMP protection unit is connected to 220V ac.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293964.XA CN112865057A (en) | 2021-03-19 | 2021-03-19 | Electromagnetic protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293964.XA CN112865057A (en) | 2021-03-19 | 2021-03-19 | Electromagnetic protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN112865057A true CN112865057A (en) | 2021-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110293964.XA Pending CN112865057A (en) | 2021-03-19 | 2021-03-19 | Electromagnetic protection circuit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204190381U (en) * | 2014-12-03 | 2015-03-04 | 国家电网公司 | A kind of antisurge interference prevention device based on power meter reading system |
| CN208285219U (en) * | 2018-05-23 | 2018-12-25 | 东莞捷荣技术股份有限公司 | A kind of switching power circuit of intelligence dress patch machine |
| KR102130660B1 (en) * | 2019-07-19 | 2020-07-07 | 한국전기연구원 | Emp protective device for power source using power semiconductor |
| CN112019039A (en) * | 2020-08-28 | 2020-12-01 | 广州广电计量检测股份有限公司 | Power interface circuit with high-grade surge protection and high EMI performance |
| CN112510667A (en) * | 2020-11-12 | 2021-03-16 | 熊秀 | Electromagnetic pulse protection circuit and equipment |
-
2021
- 2021-03-19 CN CN202110293964.XA patent/CN112865057A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204190381U (en) * | 2014-12-03 | 2015-03-04 | 国家电网公司 | A kind of antisurge interference prevention device based on power meter reading system |
| CN208285219U (en) * | 2018-05-23 | 2018-12-25 | 东莞捷荣技术股份有限公司 | A kind of switching power circuit of intelligence dress patch machine |
| KR102130660B1 (en) * | 2019-07-19 | 2020-07-07 | 한국전기연구원 | Emp protective device for power source using power semiconductor |
| CN112019039A (en) * | 2020-08-28 | 2020-12-01 | 广州广电计量检测股份有限公司 | Power interface circuit with high-grade surge protection and high EMI performance |
| CN112510667A (en) * | 2020-11-12 | 2021-03-16 | 熊秀 | Electromagnetic pulse protection circuit and equipment |
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Application publication date: 20210528 |