CN104754929B - driving circuit composite shielding device - Google Patents
driving circuit composite shielding device Download PDFInfo
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- CN104754929B CN104754929B CN201510199643.8A CN201510199643A CN104754929B CN 104754929 B CN104754929 B CN 104754929B CN 201510199643 A CN201510199643 A CN 201510199643A CN 104754929 B CN104754929 B CN 104754929B
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Abstract
The present invention relates between IGBT and driving unit shielding and isolation technology, specially a kind of driving circuit composite shielding device.Solves the technical issues of electromagnetic interference between current IGBT and driving unit cannot shield completely and high pressure interference cannot be isolated.A kind of driving circuit composite shielding device, including one layer of metal shielding board, two layers of insulation board and the insulating protective film for being integrated this three ply board press seal.It is to be processed by insulating materials GPO-3 with a thickness of 1 ~ 1.5mm insulating layer that metal shielding board, which is processed by 6061 aluminum alloy plate materials of 1 ~ 1.5mm thickness, is close to metal shielding board two sides, is being integrally formed metal screen layer and dielectric layers press seal using the insulating protective film of high voltage；Driving plate mounting hole is provided in combined screen shield plate；The metal part segmentation on metal layer four sides up and down extends outwardly, and extension is provided with mounting hole.The present invention can be reduced interference of the alternating magnetic field to driving plate low-voltage signal, improve the reliability of IGBT work；Also it is able to satisfy the electrical pressure-resistant insulation conditions of up to 10000V.
Description
Technical field
The present invention relates to the shielding insulation isolation technology between IGBT and driving unit, specially a kind of driving circuit combined screen
Cover device.
Background technique
With electric current, voltage class is continuously improved, and IGBT becomes in the converter device in AC drive locomotive environment
Rationality device work, and opening and turning off for high-voltage great-current IGBT, are the key that complete power cell functional mapping.Driving is single
Member is used to control IGBT switch and protection IGBT, so driving circuit has an important influence entire current transformer.Traction control list
First Traction Control Unit（Hereinafter referred to as TCU）It issues control signal and passes to driving circuit（Driving plate）, driving electricity
Road issues signal control IGBT switch again, and IGBT working condition passes to TCU by the feedback signal of driving plate, failure and
Shi Jinhang protection.So signal transmitting quality play the role of to the control and protection of IGBT it is vital, if input letter
It number is interfered, directly contributes the damage of IGBT, or even explosion.Currently, the signal of driving plate to IGBT are passed by cable
It is defeated, and therebetween it is the place of electromagnetic interference most serious, so it is particularly important to carry out shielding work between driving plate and IGBT.
The shielding between driving plate and IGBT adopts the following technical scheme that at present：1）The measure of being dielectrically separated from only is taken, is not set
Set special shielded layer；
2）Using the mode that metal shielding board and insulation board are discrete.
But these technologies have the disadvantage that：
1）It is not provided with shielded layer, to high-voltage great-current circuit, effectiveness is very poor, and IGBT is easily damaged；
2）Using the mode that metal shielding board and insulation board are discrete, very large space is occupied, system is very too fat to move, is not able to satisfy
Spatial volume requirement.
Therefore being highly desirable to one kind being capable of save space, and effectively electromagnetic interference and high pressure of the shield guard plate to IGBT again
The device of interference.
Summary of the invention
The present invention is to solve electromagnetic interference between current IGBT and driving unit to shield completely and high pressure cannot be isolated
The technical issues of interference, provides a kind of driving circuit composite shielding device.
Realization that the present invention adopts the following technical solutions：A kind of driving circuit composite shielding device, including one compound
Barricade, combined screen shield plate are consolidated the metal layer that profile is 1~1.5mm thickness made of 6061 aluminium alloys, abutting metal layer two sides
It is fixed with a thickness of 1 ~ 1.5mm insulating layer and to be compounded in the insulation of two side insulation layer outer surfaces made of insulating materials GPO-3
Protective film composition；Combined screen shield plate is provided with driving plate mounting hole on outer surface；Four sides part is outside up and down for metal layer
Extend, extension is provided with installation pin.
Electro Magnetic Compatibility is important one of the index of product quality.To reduce alternating electric field to the coupled interference of sensitive circuit
Voltage can be arranged the metal shield of good conductivity between interference source and sensitive circuit, and metal shield is grounded.When
When interfering the frequency of electromagnetic field higher, using the vortex generated in the metal material of low-resistivity, formed to external electromagnetic wave
Negative function, to achieve the effect that shielding；When interfere electromagnetic wave frequency it is lower when, it is desirable that using the material of high permeability,
To make the magnetic line of force be limited in inside shield, prevent the space for being diffused into shielding from going.The general thickness using electrical shielding body is not
Must be excessive, and using skin depth and structural strength as major consideration.
Combined screen shield plate is made of five-layer structure, and one layer good using electric conductivity, lower-cost 1~1.5mm thicker material
For 6061 aluminium alloy（Metal layer）, shielding main body as driving circuit composite shielding device；Another layer using insulation and machine
Tool insulating materials GPO-3 of good performance is compressed on the two sides of metal layer, for preventing shelf depreciation with a thickness of 1~1.5mm
And high_voltage isolation；Each compound one layer of insulating protective film in another two insulating layer outer surface realizes electric insulation and press seal to driving circuit
The effect being integrated.The selection of the material and thickness of aluminium alloy and insulating layer can be played under the premise of overall cost is cheap
To greatest extent between shield guard plate and IGBT electromagnetic interference effect.
Further, an insulation is respectively fixed with close to the position on upper and lower top in the middle part of the outer surface of combined screen shield plate
Slot；Driving plate mounting hole is insulated vias.
Driving plate mounting hole is insulated vias, realizes electric insulation；Insulation tank is sticked in combined screen shield plate central closing,
Creepage distance of the increase frame to driving plate；The installation pin that combined screen shield plate is stretched out is shielding main body（Metal layer）Corner,
It is mounted on metal framework, to realize electric field shielding.
The technical solution adopted in the present invention solves the problems, such as three：1）Due to the electricity generated when the work of high-voltage alternating busbar
Magnetic field generates interference to driving plate low-voltage signal, so the present invention is using a kind of good metal material of conductivity as composite shielding
The main body of plate（That is metal layer）；2）Due to being limited by module shape, driving plate is closer from module high voltage signal, avoids due to gold
Belong to and generate electric discharge phenomena between the wedge angle of barricade and the part wedge angle of composite bus bar, using a kind of insulation material of good insulation preformance
Material, and it is compressed on metal layer two sides；3）It is limited by modular structure, driving plate is from frame and metal material（Metal layer）It is closer,
It can not meet electric insulation condition, so increase a kind of insulation tank and insulating protective film in shielding plate surface, it is electrical exhausted to meet
Edge requirement.
The present invention has following technological merit：
1）Interference of the alternating magnetic field to driving plate low-voltage signal is reduced, the reliability of IGBT work is improved；
2）It is small in size, space is saved, and be able to satisfy electric insulation condition；
3）Due to being constrained by modular structure, it can not meet creepage distance and electric clearance, composite shielding device, which increases, climbs
Electrical distance and electric clearance, efficiently solve the problems, such as this.
Detailed description of the invention
Fig. 1 schematic view of the front view of the present invention.
Fig. 2 side structure schematic view of the present invention.
Fig. 3 combined screen shield plate schematic cross-sectional view of the present invention.
1- combined screen shield plate, 2- metal layer, 3- insulating layer, 4- insulating protective film, 5- driving plate mounting hole, 6- installation are drawn
Foot, 7- insulation tank.
Specific embodiment
A kind of driving circuit composite shielding device, including a combined screen shield plate 1, combined screen shield plate 1 are 6061 by profile
1 ~ 1.5mm made of aluminium alloy（1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm may be selected）It is thick metal layer 2, tight
2 two sides of metal layer made of insulating materials GPO-3 with a thickness of 1 ~ 1.5mm（May be selected 1.0mm, 1.1mm, 1.2mm,
1.3mm,1.4mm,1.5mm）Insulating layer 3 and the insulating protective film 4 for being compounded in 3 outer surface of insulating layer form；Combined screen shield plate 1
Driving plate mounting hole 5 is provided on outer surface；Four sides partially extend outwardly metal layer 2 up and down, and extension is provided with peace
Fill pin 6.Each rim portion of combined screen shield plate extends outwardly in Fig. 1, and if the right only partially extends outwardly, and the left side is then
Entirety extends outwardly.
Position in the middle part of the outer surface of combined screen shield plate 1 close to upper and lower top is respectively fixed with an insulation tank 7；Driving plate
Mounting hole 5 is insulated vias.
The insulation tank 7 is of an L-shaped structure, and two insulation tanks 7 up and down are symmetrical with 1 horizontal center line of combined screen shield plate
Axis setting symmetrical above and below.As described in Figure 1, L-shaped insulation tank setting symmetrical above and below, its vertical section of the insulation tank 7 of top are located at water
The top of flat section；And the insulation tank 7 of lower section its vertical section is located at the top of horizontal segment.Insulation tank protrudes from the outer of combined screen shield plate
Surface can be further improved the electrical insulation properties of composite insulating board.
The insulating protective film 4 is made of polyimides or polyethylene or polyvinylidene fluoride or polytetrafluoroethylene (PTFE).It should
Kind insulated with material effect is good and low in cost.It is the public affairs of this field by the technology that above-mentioned material is compounded in composite shielding plate surface
Know technology.
Claims (1)
1. a kind of driving circuit composite shielding device, which is characterized in that including a combined screen shield plate（1）, combined screen shield plate（1）
It is the metal layer of 1~1.5mm thickness made of 6061 aluminium alloys profile（2）, be close to metal layer（2）Two sides it is fixed by insulation material
Expect made of GPO-3 with a thickness of 1 ~ 1.5mm insulating layer（3）And it is compounded in two side insulation layers（3）The insulating protective film of outer surface
（4）Composition；Combined screen shield plate（1）Driving plate mounting hole is provided on outer surface（5）；Metal layer（2）The equal portion in four sides up and down
Divide and extend outwardly, extension is provided with installation pin（6）；Combined screen shield plate（1）Outer surface in the middle part of close to upper and lower top position
It sets and is respectively fixed with an insulation tank（7）；Driving plate mounting hole（5）For insulated vias；The insulation tank（7）It is of an L-shaped structure, institute
State two insulation tanks up and down（7）With combined screen shield plate（1）Horizontal center line is symmetry axis setting symmetrical above and below；The insulation protection
Film（4）It is made of polyimides or polyethylene or polyvinylidene fluoride or polytetrafluoroethylene (PTFE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199643.8A CN104754929B (en) | 2015-04-25 | 2015-04-25 | driving circuit composite shielding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510199643.8A CN104754929B (en) | 2015-04-25 | 2015-04-25 | driving circuit composite shielding device |
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| Publication Number | Publication Date |
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| CN104754929A CN104754929A (en) | 2015-07-01 |
| CN104754929B true CN104754929B (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510199643.8A Active CN104754929B (en) | 2015-04-25 | 2015-04-25 | driving circuit composite shielding device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109431462A (en) * | 2018-10-17 | 2019-03-08 | 南京沃福曼医疗科技有限公司 | A method of increasing OCT equipment creepage distance and electric clearance |
| CN109713879A (en) * | 2018-12-10 | 2019-05-03 | 中车永济电机有限公司 | A kind of multi-functional power supply and driving device of band shielding |
| CN111031773B (en) * | 2019-12-20 | 2021-06-22 | 中车永济电机有限公司 | Electromagnetic interference prevention photoelectric conversion plate shielding box |
| CN113114053B (en) * | 2021-04-02 | 2022-06-24 | 中国第一汽车股份有限公司 | Inverter assembly with high electromagnetic compatibility grade |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047163A (en) * | 1990-03-16 | 1990-11-21 | 辽宁省锦州新生开关厂 | Composite insulating board and application thereof |
| CN201414276Y (en) * | 2009-05-23 | 2010-02-24 | 吴升赋 | Shielding device with strong electromagnetic interference resistance |
| CN103915987A (en) * | 2013-01-09 | 2014-07-09 | 永济新时速电机电器有限责任公司 | Protecting and isolating device and IGBT power module |
| CN204518317U (en) * | 2015-04-25 | 2015-07-29 | 永济新时速电机电器有限责任公司 | Drive circuit composite shielding device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101808498A (en) * | 2010-03-23 | 2010-08-18 | 青岛华轩复合新材料科技有限公司 | Composite plate with electromagnetic shielding and antistatic effects and production process |
-
2015
- 2015-04-25 CN CN201510199643.8A patent/CN104754929B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1047163A (en) * | 1990-03-16 | 1990-11-21 | 辽宁省锦州新生开关厂 | Composite insulating board and application thereof |
| CN201414276Y (en) * | 2009-05-23 | 2010-02-24 | 吴升赋 | Shielding device with strong electromagnetic interference resistance |
| CN103915987A (en) * | 2013-01-09 | 2014-07-09 | 永济新时速电机电器有限责任公司 | Protecting and isolating device and IGBT power module |
| CN204518317U (en) * | 2015-04-25 | 2015-07-29 | 永济新时速电机电器有限责任公司 | Drive circuit composite shielding device |
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| CN104754929A (en) | 2015-07-01 |
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Address after: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Applicant after: CRRC YONGJI ELECTRIC CO., LTD. Address before: 044500 Yongji City, Shanxi Province, the city of motor street, No. 18, No. Applicant before: Yongji Xinshisu Motor Electrical Appliance Co., Ltd. |
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