CN112737311A - Filter circuit - Google Patents
Filter circuit Download PDFInfo
- Publication number
- CN112737311A CN112737311A CN202011543023.9A CN202011543023A CN112737311A CN 112737311 A CN112737311 A CN 112737311A CN 202011543023 A CN202011543023 A CN 202011543023A CN 112737311 A CN112737311 A CN 112737311A
- Authority
- CN
- China
- Prior art keywords
- filter
- transient suppression
- pin
- suppression tube
- polar capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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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
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
Abstract
The invention provides a filter circuit which comprises a filter, a boosting module U2 and a voltage reduction module U1, wherein one end of the filter is connected to a power supply, the anode of the power consumption end of the filter is connected with an anti-reverse diode D4 in series, and a transient suppression tube Z4 and a transient suppression tube Z5 are connected between the anode and the cathode of the power consumption end of the filter in parallel; the positive electrode of the power consumption end of the filter sequentially passes through the reverse connection prevention diode D1 and the first end of the transient suppression tube Z1 and then is connected to the pin Vin of the voltage reduction module U1, and the negative electrode sequentially passes through the second end of the transient suppression tube Z1 and then is connected to the pin GND and the pin ON/OFF of the voltage reduction module U1. The filter circuit disclosed by the invention filters out electromagnetic interference through the filter, suppresses high voltage by using the piezoresistor and the transient suppression tube, and stabilizes the voltage at 24V by using the voltage boosting and reducing module, so that the problem that a control system works abnormally due to electromagnetic interference and unstable power supply is solved.
Description
Technical Field
The invention belongs to the technical field of electronics, and particularly relates to a filter circuit.
Background
The development of the electronic control technology of modern diesel engines brings infinite convenience to work and also brings trouble to electromagnetic interference, and the problem of the electromagnetic interference becomes one of important obstacles for limiting the development of electronic technology and information technology. In order to meet the requirements of electronic control technology of the diesel engine, a filter circuit is designed.
Disclosure of Invention
In view of the above, the present invention is directed to a filter circuit to solve the problem of electromagnetic interference in the design process of an electronic control system of a diesel engine.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a filter circuit comprises a filter, a boosting module U2 and a voltage reduction module U1, wherein one end of the filter is connected to a power supply, and the positive electrode of the power consumption end of the filter is connected to a power supply OUT2+ after sequentially passing through the first end of a piezoresistor RZ2, the first end of a piezoresistor RZ3, an anti-reverse diode D4, the first end of a transient suppression tube Z4, the first end of a transient suppression tube Z5 and the first end of a polar capacitor E5; the negative electrode of the power consumption end of the filter is connected to a power supply OUT 2-after sequentially passing through the second end of the piezoresistor RZ2, the second end of the piezoresistor RZ3, the second end of the transient suppression tube Z4, the second end of the transient suppression tube Z5 and the second end of the polar capacitor E5; the model of the voltage reduction module U1 is LM2575-5, the positive pole of the power consumption end of the filter sequentially passes through an anti-reverse diode D1, a fuse F1, the first end of a piezoresistor RZ1, the first end of a transient suppression tube Z1 and the positive pole of a polar capacitor E1 and then is connected to a pin Vin of the voltage reduction module U1, the negative pole of the power consumption end of the filter sequentially passes through the second end of the piezoresistor RZ1, the second end of the transient suppression tube Z1 and the negative pole of a polar capacitor E1 and then is connected to a pin GND and a pin ON/OFF of the voltage reduction module U1; a pin OUT of the voltage reduction module U1 is connected to a third pin of the voltage boost module U2, a first end of a diode D2 and a self-interference inductor L2 in sequence, and then connected to OUT + after passing through the diode D3, a first end of a transient suppression tube Z3, the anode of a polar capacitor E3 and the anode of a polar capacitor E4; a pin BACK of the voltage reduction module U1 is connected to a first end of the transient suppression tube Z3 via the transient suppression tube Z2; the pin ON/OFF of the voltage reduction module U1 is sequentially connected to an OUT-pole through a second end of the diode D2, a second pin of the voltage boost module U2, a negative pole of the polar capacitor E2 and a negative pole of the polar capacitor E4, the OUT-pole is grounded, a first pin of the voltage boost module U2 is respectively connected to a positive pole of the polar capacitor E2 and a first end of the resistor R1, and a second end of the resistor R1 is connected to a second end of the transient suppression tube Z3.
Further, a capacitor C2 is connected in parallel between the polar capacitor E3 and the polar capacitor E4.
Furthermore, the model of the filter is DU 02M-10A;
further, the model of the boosting module U2 is TOP 104.
Further, the transient suppression tube Z1 is IN 4007.
Further, the type of the reverse connection prevention diode D4 is MUR 1620.
Compared with the prior art, the filter circuit has the following advantages:
(1) the filter circuit disclosed by the invention filters out electromagnetic interference through the filter, suppresses high voltage by using the piezoresistor and the transient suppression tube, and stabilizes the voltage at 24V by using the voltage boosting and reducing module, so that the problem that a control system works abnormally due to electromagnetic interference and unstable power supply is solved.
(2) The filter circuit provided by the invention widens the reliability adaptive range and meets the electromagnetic compatibility requirement in the use process.
(3) According to the filter circuit, when the voltage of a power supply is lower than 24V, the voltage of the power supply can be adjusted to 24V by the aid of the boosting module U2; when the supply voltage is higher than 24V, the voltage reduction module U1 can regulate the supply voltage to 24V.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a filter circuit according to an embodiment of the invention;
fig. 2 is a schematic diagram of a heat dissipation assembly of a power tube according to an embodiment of the present invention.
Description of reference numerals:
1-a thermally conductive insulating pad; 2-a power tube; 3-tabletting; 4-screws.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A filter circuit is shown in fig. 1 and fig. 2, and comprises a filter, a boosting module U2 and a voltage reduction module U1, wherein one end of the filter is connected to a power supply, and the positive electrode of the power consumption end of the filter is connected to a power supply OUT2+ after sequentially passing through the first end of a piezoresistor RZ2, the first end of a piezoresistor RZ3, an anti-reverse diode D4, the first end of a transient suppression tube Z4, the first end of a transient suppression tube Z5 and the first end of a polar capacitor E5; the negative electrode of the power consumption end of the filter is connected to a power supply OUT 2-after sequentially passing through the second end of the piezoresistor RZ2, the second end of the piezoresistor RZ3, the second end of the transient suppression tube Z4, the second end of the transient suppression tube Z5 and the second end of the polar capacitor E5; the model of the voltage reduction module U1 is LM2575-5, the positive pole of the power consumption end of the filter sequentially passes through an anti-reverse diode D1, a fuse F1, the first end of a piezoresistor RZ1, the first end of a transient suppression tube Z1 and the positive pole of a polar capacitor E1 and then is connected to a pin Vin of the voltage reduction module U1, the negative pole of the power consumption end of the filter sequentially passes through the second end of the piezoresistor RZ1, the second end of the transient suppression tube Z1 and the negative pole of a polar capacitor E1 and then is connected to a pin GND and a pin ON/OFF of the voltage reduction module U1; a pin OUT of the voltage reduction module U1 is connected to a third pin of the voltage boost module U2, a first end of a diode D2 and a self-interference inductor L2 in sequence, and then connected to OUT + after passing through the diode D3, a first end of a transient suppression tube Z3, the anode of a polar capacitor E3 and the anode of a polar capacitor E4; a pin BACK of the voltage reduction module U1 is connected to a first end of the transient suppression tube Z3 via the transient suppression tube Z2; the pin ON/OFF of the voltage reduction module U1 is sequentially connected to an OUT-pole through a second end of the diode D2, a second pin of the voltage boost module U2, a negative pole of the polar capacitor E2 and a negative pole of the polar capacitor E4, the OUT-pole is grounded, a first pin of the voltage boost module U2 is respectively connected to a positive pole of the polar capacitor E2 and a first end of the resistor R1, and a second end of the resistor R1 is connected to a second end of the transient suppression tube Z3. The invention can filter out electromagnetic interference, prevent reverse voltage connection, inhibit surge voltage and stabilize the voltage at 24V through the voltage boosting and reducing module.
A capacitor C2 is connected in parallel between the polar capacitor E3 and the polar capacitor E4.
Preferably, the model of the filter is DU 02M-10A; the model of the boosting module U2 is TOP 104; the model number of the transient suppression tube Z1 is IN 4007; the anti-reverse diode D4 is of the type MUR 1620.
The filter filters out electromagnetic interference; the reverse connection prevention diode is used for preventing the field power supply from being connected with a reverse burning circuit; the boosting module U2 is used for regulating the power supply, and when the power supply voltage is lower than 24V, the boosting module U2 can regulate the power supply voltage to 24V; the voltage reduction module U1 is used for regulating the power supply, and when the power supply voltage is higher than 24V, the voltage reduction module U1 can regulate the power supply voltage to 24V; the piezoresistor prevents instantaneous high voltage; the transient suppression tube is used to prevent sustained high pressure.
As shown in fig. 2, in order to ensure the heat dissipation of the power tube 2 of the filter circuit, the power tube 2 is vertically assembled, a heat-conducting insulating pad 1 is arranged between the power tube 2 and the shell during assembly, heat-conducting silicone grease is coated on two sides of the heat-conducting insulating pad, a pressing sheet 3 is pressed on the heat-conducting insulating pad and fixed by a screw 4 to prevent screw threads from loosening, screw threads are coated with screw thread glue, the shell is utilized to fully dissipate heat, the reliability is improved, pin breakage caused by vibration in the using process is prevented, a layer 704 of adhesive is coated after assembly is completed, the pin is solidified into a whole, and the using.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A filter circuit, characterized by: the power supply comprises a filter, a boosting module U2 and a voltage reduction module U1, wherein one end of the filter is connected to a power supply, and the anode of the power consumption end of the filter is connected to a power supply OUT2+ after sequentially passing through the first end of a piezoresistor RZ2, the first end of a piezoresistor RZ3, an anti-reverse diode D4, the first end of a transient suppression tube Z4, the first end of a transient suppression tube Z5 and the first end of a polar capacitor E5; the negative electrode of the power consumption end of the filter is connected to a power supply OUT 2-after sequentially passing through the second end of the piezoresistor RZ2, the second end of the piezoresistor RZ3, the second end of the transient suppression tube Z4, the second end of the transient suppression tube Z5 and the second end of the polar capacitor E5; the positive pole of the power consumption end of the filter sequentially passes through the reverse connection prevention diode D1, the fuse F1, the first end of the piezoresistor RZ1, the first end of the transient suppression tube Z1 and the positive pole of the polar capacitor E1 and then is connected to the pin Vin of the voltage reduction module U1, and the negative pole of the power consumption end of the filter sequentially passes through the second end of the piezoresistor RZ1, the second end of the transient suppression tube Z1 and the negative pole of the polar capacitor E1 and then is connected to the pin GND and the pin ON/OFF of the voltage reduction module U1; a pin OUT of the voltage reduction module U1 is connected to a third pin of the voltage boost module U2, a first end of a diode D2 and a self-interference inductor L2 in sequence, and then connected to OUT + after passing through the diode D3, a first end of a transient suppression tube Z3, the anode of a polar capacitor E3 and the anode of a polar capacitor E4; a pin BACK of the voltage reduction module U1 is connected to a first end of the transient suppression tube Z3 via the transient suppression tube Z2; the pin ON/OFF of the voltage reduction module U1 is sequentially connected to an OUT-pole through a second end of the diode D2, a second pin of the voltage boost module U2, a negative pole of the polar capacitor E2 and a negative pole of the polar capacitor E4, the OUT-pole is grounded, a first pin of the voltage boost module U2 is respectively connected to a positive pole of the polar capacitor E2 and a first end of the resistor R1, and a second end of the resistor R1 is connected to a second end of the transient suppression tube Z3.
2. A filter circuit according to claim 1, wherein: a capacitor C2 is connected in parallel between the polar capacitor E3 and the polar capacitor E4.
3. A filter circuit according to claim 1, wherein: the model of the filter is DU 02M-10A.
4. A filter circuit according to claim 1, wherein: the model of the boost module U2 is TOP 104.
5. A filter circuit according to claim 1, wherein: the transient suppression tube Z1 is model IN 4007.
6. A filter circuit according to claim 1, wherein: the anti-reverse diode D4 is of the type MUR 1620.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011543023.9A CN112737311A (en) | 2020-12-21 | 2020-12-21 | Filter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011543023.9A CN112737311A (en) | 2020-12-21 | 2020-12-21 | Filter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112737311A true CN112737311A (en) | 2021-04-30 |
Family
ID=75604976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011543023.9A Pending CN112737311A (en) | 2020-12-21 | 2020-12-21 | Filter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112737311A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113434000A (en) * | 2021-07-13 | 2021-09-24 | 苏州永锋机器人技术有限公司 | Laser positioning module circuit of integrated gyroscope |
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| CN206862347U (en) * | 2017-06-23 | 2018-01-09 | 国网浙江省电力公司宁波供电公司 | A kind of novel field shaft tower surveys the device that inclines |
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| CN207459971U (en) * | 2017-11-22 | 2018-06-05 | 深圳市昊岳科技有限公司 | A kind of power supply conversion of automotive electronics and surging protection circuit |
| CN109143929A (en) * | 2018-08-22 | 2019-01-04 | 北京丰隆汇技术有限公司 | A kind of windowing house shading system control circuit and intelligent protection device |
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2020
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| CN101957413A (en) * | 2010-09-21 | 2011-01-26 | 深圳市华力特电气股份有限公司 | Relay protection device detection circuit |
| CN102510205A (en) * | 2011-11-08 | 2012-06-20 | 中国兵器工业集团第七0研究所 | Wide-range input direct-current rectification filter circuit |
| CN103121409A (en) * | 2011-11-18 | 2013-05-29 | 北汽福田汽车股份有限公司 | Automobile braking circuit protecting device and automobile braking device provided with the same |
| CN103401417A (en) * | 2013-08-15 | 2013-11-20 | 天津市北海通信技术有限公司 | Power supply module of equipment in digital passenger information system |
| CN203434620U (en) * | 2013-09-25 | 2014-02-12 | 武汉陆水科技开发有限公司 | Novel overvoltage trigger |
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| CN113434000A (en) * | 2021-07-13 | 2021-09-24 | 苏州永锋机器人技术有限公司 | Laser positioning module circuit of integrated gyroscope |
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Application publication date: 20210430 |