CN104754929A - Composite shielding device for driving circuit - Google Patents
Composite shielding device for driving circuit Download PDFInfo
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- CN104754929A CN104754929A CN201510199643.8A CN201510199643A CN104754929A CN 104754929 A CN104754929 A CN 104754929A CN 201510199643 A CN201510199643 A CN 201510199643A CN 104754929 A CN104754929 A CN 104754929A
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Abstract
The invention relates to a shielding and isolating technology between an IGBT (Insulated Gate Bipolar Translator) and a driving unit, in particular to a composite shielding device for the driving circuit. According to the composite shielding device, the technical problems that electromagnetic interference between the IGBT and the driving unit cannot be completely shielded and high-voltage interference cannot be isolated at present are solved. The composite shielding device for the driving circuit comprises a layer of metal shielding plate, two layers of insulating plates and an insulating protective film for performing pressing seal on the three layers of plates to form a whole; the metal shielding plate is produced by processing a 6061 aluminum-alloy sheet with the thickness of 1 to 1.5mm; insulating layers with the thickness of 1 to 1.5mm, which are made by processing insulating materials GPO-3, are tightly adhered to two sides of the metal shielding plate; a metal shielding layer and two insulating layers are enabled to form a whole by using the high-voltage-resisting insulating protective film in a pressing seal manner; a driving plate mounting hole is formed in the composite shielding plate; metal parts on the upper side, the lower side, the left side and the right side of the metal layer outwards extend in sections; mounting holes are formed in the corresponding extending parts. According to the composite shielding device disclosed by the invention, the interference of an alternating magnetic field on a low-voltage signal of the driving plate can be reduced, the working reliability of the IGBT is improved, and electrical voltage-resisting insulating conditions of 10,000V can be met.
Description
Technical field
The present invention relates to the shielding insulation isolation technology between IGBT and driver element, be specially a kind of drive circuit composite shielding device.
Background technology
Along with electric current, electric pressure improves constantly, and IGBT becomes the rationality device work in the converter device in AC drive locomotive environment, and opening and shutoff of high-voltage great-current IGBT, be the key of power cell functional mapping.Driver element be used for control IGBT switch and protection IGBT, so drive circuit is to whole current transformer important.Traction control unit Traction Control Unit(is hereinafter referred to as TCU) send control signal and pass to drive circuit (drive plate); drive circuit sends signal controlling IGBT switch again; IGBT operating state passes to TCU by the feedback signal of drive plate, breaks down and protects in time.So the control and protection of the product confrontation IGBT of signal transmission plays vital effect, if input signal is interfered, directly causes the damage of IGBT, even explode.At present, drive plate is transmitted to the signal of IGBT by cable, and is the place that electromagnetic interference is the most serious therebetween, so it is particularly important to carry out shielding work between drive plate and IGBT.
Shielding between current drive plate and IGBT adopts following technical scheme: 1) only take the quarantine measures that insulate, and does not arrange special screen;
2) metal shielding board and the discrete pattern of insulation board is adopted.
But there is following shortcoming in these technology:
1) do not arrange screen, to high-voltage great-current circuit, effectiveness is very poor, and IGBT easily damages;
2) adopt metal shielding board and the discrete pattern of insulation board, take very large space, system is very too fat to move, can not meeting spatial volume requirement.
Therefore being starved of one can save space again, again effectively shield guard plate to the device of the electromagnetic interference of IGBT and high pressure interference.
Summary of the invention
The present invention solves electromagnetic interference between current IGBT and driver element can not to shield completely and can not the technical problem disturbed of isolated high-voltage, provides a kind of drive circuit composite shielding device.
The present invention realizes by the following technical solutions: a kind of drive circuit composite shielding device, comprise a composite shielding plate, composite shielding plate by section bar be metal level that 1 ~ 1.5mm that 6061 aluminium alloys are made is thick, to be close to the thickness be made up of insulating material GPO-3 fixed metal level both sides be that 1 ~ 1.5mm insulating barrier and the insulating protective film being compounded in two side insulation layer outer surfaces form; Composite shielding plate outer surface has drive plate installing hole; Metal level up and down four limits all partly stretches out, and extension has installation pin.
Electro Magnetic Compatibility is one of important index of product quality.For reducing alternating electric field to the coupled interference voltage of sensitive circuit, the metal shield of good conductivity can be set between interference source and sensitive circuit, and by metal shield ground connection.When the frequency of interfere with electromagnetic field is higher, utilize the eddy current produced in the metal material of low-resistivity, form the negative function to external electromagnetic wave, thus reach the effect of shielding; When disturbing electromagnetic frequency lower, requiring the material adopting high permeability, thus making the magnetic line of force be limited in shield inside, preventing the space being diffused into shielding from going.The thickness of general employing electric screen body need not be excessive, and with skin depth and structural strength for major consideration.
Composite shielding plate is made up of five-layer structure, and one deck adopts conductivity good, and lower-cost 1 ~ 1.5mm thicker material is the aluminium alloy (metal level) of 6061, as the shielding main body of drive circuit composite shielding device; Another layer adopts the insulating material GPO-3 of insulation and satisfactory mechanical property, and thickness is 1 ~ 1.5mm, is compressed on the both sides of metal level, for preventing partial discharge and high_voltage isolation; Another two insulating barrier outer surface each compound one deck insulating protective film, realizes to drive circuit the effect that electric insulation and press seal be integrated.The material of aluminium alloy and insulating barrier and the selection of thickness can play electromagnetic interference between shield guard plate and IGBT to the limit under the prerequisite that integrated cost is cheap.
Further, the position near upper and lower top in the middle part of the outer surface of composite shielding plate is fixed with an insulation tank respectively; Drive plate installing hole is insulated vias.
Drive plate installing hole is insulated vias, realizes electric insulation; Stick insulation tank at composite shielding plate central closing, increase the creepage distance of framework to drive plate; The installation pin that composite shielding plate stretches out is the corner of shielding main body (metal level), is arranged on metal framework, thus realizes electric field shielding.
The technical solution adopted in the present invention solves three problems: the electromagnetic field 1) owing to producing when high-voltage alternating busbar works produces interference to drive plate low-voltage signal, so the present invention adopts metal material that a kind of conductivity is good as the main body (i.e. metal level) of composite shielding plate; 2) owing to limiting by module profile, drive plate is closer from module high voltage signal, avoids, owing to producing electric discharge phenomena between the wedge angle of metal shielding board and the part wedge angle of composite bus bar, adopting a kind of insulating material of good insulation preformance, and being compressed on metal level both sides; 3) limit by modular structure, drive plate from framework and metal material (metal level) closer, can not meet electric insulation condition, so increase a kind of insulation tank and insulating protective film, to meet electric insulation requirement on barricade surface.
The present invention has following technological merit:
1) reduce alternating magnetic field to the interference of drive plate low-voltage signal, improve the reliability of IGBT work;
2) volume is little, saves space, and can meet electric insulation condition;
3) owing to retraining by modular structure, can not meet creepage distance and electric clearance, composite shielding device adds creepage distance and electric clearance, efficiently solves this problem.
Accompanying drawing explanation
The main TV structure schematic diagram of Fig. 1 the present invention.
Fig. 2 side-looking structural representation of the present invention.
Fig. 3 composite shielding plate of the present invention cross-sectional schematic.
1-composite shielding plate, 2-metal level, 3-insulating barrier, 4-insulating protective film, 5-drive plate installing hole, 6-installs pin, 7-insulation tank.
Embodiment
A kind of drive circuit composite shielding device, comprise a composite shielding plate 1, composite shielding plate 1 is that 1 ~ 1.5mm(that 6061 aluminium alloys are made can select 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm by section bar) thick metal level 2, the thickness be made up of insulating material GPO-3 of being close to metal level 2 both sides is that 1 ~ 1.5mm(can select 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm) insulating barrier 3 and the insulating protective film 4 that is compounded in insulating barrier 3 outer surface form; Composite shielding plate 1 outer surface has drive plate installing hole 5; Metal level 2 up and down four limits all partly stretches out, and extension has installs pin 6.What in Fig. 1, each edge of composite shielding plate was divided stretches out, and as the right just partly stretches out, the left side then entirety stretches out.
Position near upper and lower top in the middle part of the outer surface of composite shielding plate 1 is fixed with an insulation tank 7 respectively; Drive plate installing hole 5 is insulated vias.
Described insulation tank 7 in L-type structure, described upper and lower two insulation tanks 7 with composite shielding plate 1 horizontal center line for symmetry axis is symmetrical arranged up and down.As described in Figure 1, the insulation tank of L shape is symmetrical arranged up and down, and its vertical section of the insulation tank 7 of top is positioned at the top of horizontal segment; And its vertical section of the insulation tank 7 of below is positioned at the top of horizontal segment.Insulation tank protrudes from the outer surface of composite shielding plate, can improve the electrical insulation properties of composite insulating board further.
Described insulating protective film 4 adopts polyimides or polyethylene or polyvinylidene fluoride or polytetrafluoroethylene to make.This kind of insulated with material is effective, and with low cost.Technology above-mentioned material being compounded in composite shielding plate surface is the known technology of this area.
Claims (4)
1. a drive circuit composite shielding device, it is characterized in that, comprise a composite shielding plate (1), composite shielding plate (1) by section bar be metal level (2) that 1 ~ 1.5mm that 6061 aluminium alloys are made is thick, to be close to the thickness be made up of insulating material GPO-3 fixed metal level (2) both sides be that 1 ~ 1.5mm insulating barrier (3) and the insulating protective film (4) being compounded in two side insulation layers (3) outer surface form; Composite shielding plate (1) outer surface has drive plate installing hole (5); Metal level (2) up and down four limits all partly stretches out, and extension has installs pin (6).
2. drive circuit composite shielding device as claimed in claim 1, is characterized in that, the position near upper and lower top in the middle part of the outer surface of composite shielding plate (1) is fixed with an insulation tank (7) respectively; Drive plate installing hole (5) is insulated vias.
3. drive circuit composite shielding device as claimed in claim 2, it is characterized in that, described insulation tank (7) is in L-type structure, and described upper and lower two insulation tanks (7) are that symmetry axis is symmetrical arranged up and down with composite shielding plate (1) horizontal center line.
4. drive circuit composite shielding device as claimed in claim 1 or 2, is characterized in that, described insulating protective film (4) adopts polyimides or polyethylene or polyvinylidene fluoride or polytetrafluoroethylene to make.
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 true CN104754929A (en) | 2015-07-01 |
| CN104754929B CN104754929B (en) | 2018-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510199643.8A Active CN104754929B (en) | 2015-04-25 | 2015-04-25 | driving circuit composite shielding device |
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Cited By (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 |
| CN111031773A (en) * | 2019-12-20 | 2020-04-17 | 中车永济电机有限公司 | Electromagnetic interference prevention photoelectric conversion plate shielding box |
| CN113114053A (en) * | 2021-04-02 | 2021-07-13 | 中国第一汽车股份有限公司 | Inverter assembly with high electromagnetic compatibility grade |
Citations (5)
| 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 |
| 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 |
| 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 |
-
2015
- 2015-04-25 CN CN201510199643.8A patent/CN104754929B/en active Active
Patent Citations (5)
| 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 |
| 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 |
| 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 |
Cited By (5)
| 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 |
| CN111031773A (en) * | 2019-12-20 | 2020-04-17 | 中车永济电机有限公司 | Electromagnetic interference prevention photoelectric conversion plate shielding box |
| 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 |
| CN113114053A (en) * | 2021-04-02 | 2021-07-13 | 中国第一汽车股份有限公司 | Inverter assembly with high electromagnetic compatibility grade |
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| Publication number | Publication date |
|---|---|
| CN104754929B (en) | 2018-11-23 |
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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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