CN103501118B - A kind of heat tube type wind power converter power unit - Google Patents
A kind of heat tube type wind power converter power unit Download PDFInfo
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- CN103501118B CN103501118B CN201310453438.0A CN201310453438A CN103501118B CN 103501118 B CN103501118 B CN 103501118B CN 201310453438 A CN201310453438 A CN 201310453438A CN 103501118 B CN103501118 B CN 103501118B
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- heat pipe
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- pipe
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The invention discloses a kind of wind power converter power unit, comprise and form inverter bridge and control protection electric circuit thereof by power switch IGBT, described inverter bridge is furnished with direct current inlet highway, exchanges output lead and radiator; Described radiator comprises substrate, fin and heat pipe, and the upper surface of substrate is provided with groove, imbeds heat pipe, and the position of the corresponding heater element of heat pipe is arranged, fin perpendicular to substrate, gap distribution below substrate; Described heat pipe is the copper pipe that hollow is airtight, and inside is filled with low-boiling condensate liquid.Current transformer of wind-driven generator power cell of the present invention, improves inversion reliability, fail safe, and component shape and locus layout are more reasonable, and good heat dissipation effect, stray inductance are little, can play IGBT power characteristic more fully, improve inversion efficiency.
Description
Technical field
The present invention relates to wind power converter control system field, specifically realize a significant components---the heat tube type wind power converter power unit of current transformer reversals.
Background technology
Along with the lifting again and again of wind power generation power grade, from the current transformers of tens kilowatts a few megawatt current transformer till now, and the heat dissipation of power cell from air-cooledly progressively develop into liquid-cooling heat radiation pattern.The heat exchange efficiency of liquid cooling apparatus is very high, but cost is relative also higher.How under air-cooled prerequisite, allow the heat radiation of IGBT more efficient as much as possible, become the bottleneck instantly restricting current transformer power grade.
Its core component of power cell is IGBT, its caloric value increases gradually along with the lifting of power grade, and conventional aluminium radiator is due to the thermal resistance restriction of self, radiating efficiency is limited, copper radiator cost is very high again, and how can design the high power cell of a cost performance is the emphasis reducing a high-power converter cost.Present patent application unit passes through years of researches, analyze different I GBT application circuit and structure, adopt a kind of new mechanical structure and radiating mode, more safe and reliable circuit design, have devised the power cell of a safe and reliable domestically leading level.
There is following deficiency technically in power cell domestic at present:
1, cost is high.A lot of complete machine producer adopts import power cell, does not have independent intellectual property right, causes production cost to remain high.
2, radiating efficiency is low.The heat radiation of IGBT determines the efficiency of power cell, and domestic a lot of producers power cell, due to structure and radiator, is failed to give full play to the effect of heat radiation, caused power cell efficiency not high.
3, circuit design is perfect not.The means that good circuit theory design and fabric swatch technique are also reliability service power cell and protect power cell very important, the circuit board of Some Domestic producer design remains in a lot of weak point.
Summary of the invention
Object of the present invention, is to provide a kind of power cell of current transformer of wind-driven generator, and this unit has a kind of novel Drive Protecting Circuit, can realize normally inversion conversion and carry out reliably protecting to power cell.
The technical solution adopted in the present invention is:
A kind of wind power converter power unit, comprises and forms inverter bridge and control protection electric circuit thereof by power switch IGBT, and described inverter bridge is furnished with direct current inlet highway, exchanges output lead and radiator; Described radiator comprises substrate, fin and heat pipe, and the upper surface of substrate is provided with groove, imbeds heat pipe, and the position of the corresponding heater element of heat pipe is arranged, fin perpendicular to substrate, gap distribution below substrate; Described heat pipe is the copper pipe that hollow is airtight, and inside is filled with low-boiling condensate liquid.
Described heat pipe grouping arranges and 4 heat pipes are one group, the centre of these 4 heat pipes is uniformly distributed along substrate length direction, outside heat pipe is in " [" the type outwards arranged, the two ends of inner side heat pipe in " c " type outwards arranged, inner side heat pipe are oppositely arranged, and guarantee that in heater element region, heat radiation evenly.
Described heat pipe lead welding is on substrate.
The ratio of the substrate thickness of described radiator, fin thickness, fin height, spacing of fin is 12:1.5:62:2.
Described direct current inlet highway adopt three pieces of rectangular large area copper coins respectively as positive pole, negative pole with and exchange output stage, three pieces of rectangular copper arranged superposed, are lined with insulating barrier between plate.
The technique effect that the present invention produces is:
Current transformer of wind-driven generator power cell of the present invention, improves inversion reliability, fail safe, and component shape and locus layout are more reasonable, and good heat dissipation effect, stray inductance are little, can play IGBT power characteristic more fully, improve inversion efficiency.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of wind power converter power unit;
Fig. 2 is the schematic diagram of dead band interlock circuit;
Fig. 3 is the schematic diagram of PWM drive circuit;
Fig. 4 is the schematic diagram of short-circuit protection circuit;
Fig. 5 is the schematic diagram of active clamp circuit;
Fig. 6 is the structural representation of traditional Aluminium Radiator;
Fig. 7 is the 3D structural representation of power cell of the present invention;
Fig. 8 is the plan structure schematic diagram of composite bus of the present invention;
Fig. 9 is the detonation configuration schematic diagram of composite bus of the present invention;
Figure 10 is heat-pipe radiator plan structure schematic diagram of the present invention;
Figure 11 is the main TV structure schematic diagram of heat-pipe radiator of the present invention.
Number in the figure represents: 1-composite bus, and 1-1-positive plate, 1-2-negative plate, 1-3-serial connection plate, 1-4-copper backing, 1-5-PET paper, 1-6-exchange plate, 2-heat-pipe radiator, 2-1-heat pipe, 2-2-fin, 2-3-substrate.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
As shown in Fig. 1 ~ 11, the present invention is a kind of wind power converter power unit, comprises and forms inverter bridge and control protection electric circuit thereof by power switch IGBT.Inverter bridge is furnished with direct current inlet highway, exchanges output lead and radiator, and control protection electric circuit is provided with: dead band interlock circuit, PWM drive circuit, short-circuit protection circuit, active clamp circuit.Concrete:
Power cell driving design block diagram, as shown in Figure 1, describes power cell function basic in a design in figure, which includes the design of the circuit such as power supply, dead band interlocking, driving, protection.
Inverter bridge leg adopts single tube cascaded structure.
-dead band interlock circuit, carries out the dead time to PWM ripple, ensures that the voltage of the upper and lower brachium pontis of inverter bridge can not be high simultaneously, and the adjustable deadband time; The resistance of dead band time setting is 1K Ω, and the capacitance of electric capacity is 680pF.
Owing to driving core SC0435 to adopt direct mode operation in design, so PWM ripple inevitably cannot carry out straight-through protection, therefore input prime at PWM and be provided with dead band interlock circuit.Hardware link carries out being high control to PWM waveform simultaneously, ensures that upper and lower bridge arm can not be opened simultaneously or turn off, and by arranging different RC parameters, certain dead zone protection time can be set, be illustrated in fig. 2 shown below.
-PWM drive circuit, carries out process to PWM ripple and amplifies, and is opened by open resistance, pass resistance break, turns off control IGBT; Open resistance is 1.3 Ω, and the resistance of closing resistance break is 2.8 Ω.
As we can see from the figure, SC0435 is divided into the output of GH and GL two-way to drive turning on and off of IGBT respectively.Drive characteristic due to IGBT determines it and turns on and off the VCE peak voltage difference caused; therefore researcher finally determines the resistance of the driving resistance opening shutoff by great many of experiments; ensure the reasonability driven; avoid voltage overshoot to the infringement of IGBT; to greatest extent the characteristic of IGBT is fully used; the open resistance of the design is 1.3 Ω; the resistance of closing resistance break is 2.8 Ω; the clamp diode simultaneously arranged can not excessive pressure damages when shutoff for the protection of the G level of IGBT, as shown in Figure 3.
-short-circuit protection circuit, detecting due to the big current led directly to or peripheral short circuit causes by moving back saturated circuit, turning off IGBT in time; The time delayed turn-off time of short-circuit protection circuit is about 7.8us.
Short-circuit protection circuit limits the charging current to electric capacity by the resistance that resistance is very large; and the voltage by a backward diode DC bus being inputed to electric capacity is limited in below 15V; by the discharge and recharge to electric capacity, reach the overcurrent that available protecting IGBT short circuit causes.By the parameter of adjusting resistance and electric capacity; oneself power cell short-circuit protection applicable can be designed and be worth voltage and corresponding speed; the impedance operator of resistance can reduce the interference that du/dt brings greatly simultaneously; carry out the normal operation of power cell; the short-circuit protection time of the design is 7.8us, is illustrated in fig. 4 shown below.
-active clamp circuit, when the improper shutoff of power switch IGBT, can produce a higher direct voltage, utilize active clamp circuit to be opened by power switch IGBT, release overvoltage energy, thus protects IGBT.
Active clamp circuit main purpose is, when the improper shutoff of IGBT, when DC bus-bar voltage produces a peak voltage, can effectively protect IGBT to damage.By arranging the voltage of TVS diode, effectively can protect IGBT, again can not misoperation open-minded, in the design, turning-on voltage is set to 1350V, is illustrated in fig. 5 shown below.
Power cell structure adopts single tube top-bottom layout, greatly ensure that the consistency that IGBT dispels the heat, and direct current input, by after the filtering of electrochemical capacitor, enters the positive pole of pipe IGBT.Reasonably design finally by composite bus, flow out from lower pipe IGBT negative pole, whole circuit loop stray inductance is very little, effectively ensure that its safe and reliable operation, is illustrated in fig. 7 shown below.
Direct current inlet highway (composite bus 1) adopt three pieces of rectangular large area copper coins respectively as positive pole, negative pole with and exchange output stage, three pieces of rectangular copper arranged superposed, are lined with insulating barrier between plate, as shown in Figure 8.The design of composite bus 1 greatly reduces stray inductance, reduces because IGBT turns off the peak voltage brought, and direct current input employing four pins, inductance is less, can effectively reduce the installation difficulty that fitted position error is brought.Be illustrated in fig. 9 shown below, wherein 1-1 is positive plate, 1-2 is negative plate, 1-3 is serial connection plate, 1-4 is copper backing, 1-5 is PET paper, 1-6 is for exchanging plate (namely exchanging output stage).PET paper 1-5(and insulating barrier is provided with between positive plate 1-1, negative plate 1-2 and interchange plate (namely exchanging output stage) 1-6), serial connection plate 1-3 is arranged on direct current inlet highway (composite bus 1) both positive and negative polarity with copper backing 1-4 and exchanges the connecting portion place exported.
As shown in Figure 6, traditional Aluminium Radiator thermal resistance is large, and radiating efficiency is lower.The radiator of particular design of the present invention adopts up-to-date hot pipe technique, as shown in Figure 10.The heat-pipe radiator 2 that the present invention uses comprises substrate 2-3, fin 2-2 and heat pipe 2-1.Substrate 2-3 is aluminium base 2-3; The upper surface of substrate 2-3 is provided with groove, imbeds heat pipe 2-1, and the position of the corresponding heater element of heat pipe 2-1 is arranged; Fin 2-2 perpendicular to substrate 2-3, gap distribution below substrate 2-3.Heat pipe 2-1 is the copper pipe that hollow is airtight, and inside is filled with low-boiling condensate liquid, and this condensate liquid is by condensation under thermal evaporation, normal temperature.Use lead welding technology between heat pipe 2-1 and substrate 2-3, thermal resistance is lower.
Heat pipe 2-1 divides into groups to arrange and 4 heat pipe 2-1 are one group, the centre of these 4 heat pipe 2-1 is uniformly distributed along the substrate 2-3 length direction of heat-pipe radiator 2, outside heat pipe 2-1 is in " [" the type outwards arranged, the two ends of inner side heat pipe 2-1 in " c " type outwards arranged, inner side heat pipe 2-1 are oppositely arranged, and guarantee that in heater element region, heat radiation evenly.So rationally the position of discharge heat pipe 2-1, can make full use of the radiating efficiency of heat pipe 2-1, the even heat that IGBT produces is distributed in the surface of heat-pipe radiator 2.
As shown in figure 11, in this embodiment, 8 difform heat pipe 2-1 are adopted to imbed the top of heat-pipe radiator 2 substrate 2-3.8 heat pipe 2-1 are divided into two groups, and dispel the heat in corresponding 2 rectangular areas respectively.
In this embodiment, the ratio of the thickness of the substrate 2-3 of heat-pipe radiator 2, the thickness of fin 2-2, the height of fin 2-2, the spacing of fin 2-2 is 12:1.5:62:2.
Claims (4)
1. a heat tube type wind power converter power unit, comprises and forms inverter bridge and control protection electric circuit thereof by power switch IGBT, and described inverter bridge is furnished with direct current inlet highway, exchanges output lead and radiator; It is characterized in that: described radiator comprises substrate, fin and heat pipe, the upper surface of substrate is provided with groove, imbeds heat pipe, and the position of the corresponding heater element of heat pipe is arranged, fin perpendicular to substrate, gap distribution below substrate; Described heat pipe is the copper pipe that hollow is airtight, and inside is filled with low-boiling condensate liquid; Described heat pipe grouping arranges and 4 heat pipes are one group, the centre of these 4 heat pipes is uniformly distributed along the substrate length direction of heat-pipe radiator, outside heat pipe is in " [" the type outwards arranged, the two ends of inner side heat pipe in " c " type outwards arranged, inner side heat pipe are oppositely arranged, and guarantee that in heater element region, heat radiation evenly.
2. heat tube type wind power converter power unit according to claim 1, is characterized in that: described heat pipe lead welding is on substrate.
3. heat tube type wind power converter power unit according to claim 1, is characterized in that: the ratio of the substrate thickness of described radiator, fin thickness, fin height, spacing of fin is 12:1.5:62:2.
4. heat tube type wind power converter power unit according to claim 1, it is characterized in that: described direct current inlet highway adopt three pieces of rectangular large area copper coins respectively as positive pole, negative pole with and exchange output stage, three pieces of rectangular copper arranged superposed, are lined with insulating barrier between plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453438.0A CN103501118B (en) | 2013-09-29 | 2013-09-29 | A kind of heat tube type wind power converter power unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310453438.0A CN103501118B (en) | 2013-09-29 | 2013-09-29 | A kind of heat tube type wind power converter power unit |
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| CN103501118A CN103501118A (en) | 2014-01-08 |
| CN103501118B true CN103501118B (en) | 2016-03-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006278923A (en) * | 2005-03-30 | 2006-10-12 | Furukawa Electric Co Ltd:The | Vehicle-mounted heat sink |
| CN1925289A (en) * | 2006-09-15 | 2007-03-07 | 哈尔滨九洲电气股份有限公司 | High-voltage frequency changing standard transducing power unit |
| CN101778555A (en) * | 2010-01-27 | 2010-07-14 | 中电电气(江苏)股份有限公司 | Heat radiator used for power unit module |
| CN102005442A (en) * | 2009-08-27 | 2011-04-06 | 株式会社日立制作所 | Power conversion device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5901040A (en) * | 1997-07-30 | 1999-05-04 | Hewlett-Packard Company | Heat sink and Faraday Cage assembly for a semiconductor module and a power converter |
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2013
- 2013-09-29 CN CN201310453438.0A patent/CN103501118B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006278923A (en) * | 2005-03-30 | 2006-10-12 | Furukawa Electric Co Ltd:The | Vehicle-mounted heat sink |
| CN1925289A (en) * | 2006-09-15 | 2007-03-07 | 哈尔滨九洲电气股份有限公司 | High-voltage frequency changing standard transducing power unit |
| CN102005442A (en) * | 2009-08-27 | 2011-04-06 | 株式会社日立制作所 | Power conversion device |
| CN101778555A (en) * | 2010-01-27 | 2010-07-14 | 中电电气(江苏)股份有限公司 | Heat radiator used for power unit module |
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| CN103501118A (en) | 2014-01-08 |
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Address after: 618000 Jinsha Jiangxi Road, high tech Industrial Park, Deyang, Sichuan, 666 Co-patentee after: Dongfang Electric Automatic Control Engineering Co., Ltd. Patentee after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Address before: 618000 Jinsha Jiangxi Road, high tech Industrial Park, Deyang, Sichuan, 666 Co-patentee before: Sichuan Orient Electric Automatic Control Engineering Co., Ltd. Patentee before: Dongfang Turbine Co., Ltd., Dongfang Electric Group |