CN101741227A - Water-cooled three-phase diode-clamped three-level inverted power module - Google Patents
Water-cooled three-phase diode-clamped three-level inverted power module Download PDFInfo
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- CN101741227A CN101741227A CN 201010108637 CN201010108637A CN101741227A CN 101741227 A CN101741227 A CN 101741227A CN 201010108637 CN201010108637 CN 201010108637 CN 201010108637 A CN201010108637 A CN 201010108637A CN 101741227 A CN101741227 A CN 101741227A
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- bus bar
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- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
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- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/487—Neutral point clamped inverters
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Abstract
The invention discloses a water-cooled power module of three-phase diode-clamped three-level inverted topology. The water-cooled power module comprises a support frame, an electrolytic capacitor set, a second laminated bus bar, a water-cooled radiator, a first laminated bus bar, a power device, a balance resistor, a voltage sensor and first absorption capacitor sets, wherein the electrolytic capacitor set is positioned on the support frame; the second laminated bus bar is paved on the electrolytic capacitor set; the water-cooled radiator is spanned above the second laminated bus bar; a first laminated bus bar is spanned above the water-cooled radiator, and corresponding toothed connecting terminals between the first laminated bus bar and the second laminated bus bar are connected through a second absorption capacitor set; the power device, the balance resistor and the voltage sensor are fixed on the upper surface of the water-cooled radiator and are interconnected through the first laminated bus bar; and the first absorption capacitor sets are positioned above the first laminated bus bar and are interconnected through the first laminated bus bar. The water-cooled power module is arranged on the integral water-cooled radiator, so the power density is greatly improved, and the water-cooled power module can be applied to the places which are narrow or closed or have explosion-proof requirements; and the turn-off voltage spike is small, the electrolytic capacitor is difficult to emit heat, and the water-cooled power module is easy to mount and maintain.
Description
Technical field
The present invention relates to a kind of high-power three-level AC and spread the braking technique field, relate in particular to a kind of main circuit structure and layout of the water-cooling type power model at three-phase diode-clamped three-level inverted topology.
Background technology
Heavy-duty diode clamp type three-level converter based on IGBT is one of middle pressure alternating-current actuating system scheme of present extensive use, and there have been the industrial products of 0.3～7.2MVA in more domestic and international now enterprises.Compare Cascade H bridge topology, it does not have complicated multi winding transformer, and system reliability is higher, and single DC bus system makes the three-level inverter of many different capacity grades to have saved resource greatly by a rectifier energy supply.But because different clients' particular demands, often also will be even if the device electrical principle is identical through redesign, especially system configuration need expend a large amount of time and goods and materials input.(Power Electronics BuildingBlock, application PEBB) can be saved many work that repeat to the electronic power conversion module.But its independent operating use also capable of being combined, be the trend of current big-power transducer design, standardized interface between software and hardware and the volume of simplifying make it have very strong versatility, autgmentability and good electromagnetic compatibility characteristic, are subjected to the extensive welcome in designer and market.At present, industrial quarters is quite ripe in the PEBB application technology of many level Cascade H bridge inverter.And in the development of diode-clamped three level IGBT inverter PEBB, also existing Related product of minority offshore company and colleges and universities or industrial model machine, but domestic independent research is still not enough.
The key link of diode-clamped three level unsteady flow modular design is the layout of element and the application of laminated bus bars.The distribution stray inductance has material impact to the power device turn-off characteristic in the high-power device, laminated bus bars can reduce stray inductance to a great extent, suppresses each power device shutoff voltage spike effectively, saves lengthy and jumbled resistance capaciting absorpting circuit, make compact conformation, and reduce interference sensitive circuit.But, considering power grade, IGBT and power diode module volume are bigger, and terminal pitch is from far away.And should topology make that the power device quantity that participates in the change of current is more, thereby reduce change of current loop stray inductance and have suitable difficulty; On the other hand, support the bus direct voltage for the general aluminium electrochemical capacitor of cost consideration.Because its voltage withstand class is low, need a large amount of connection in series-parallel, the stray inductance on the connection line can cause high-frequency current skewness between each shunt capacitance, and the electric capacity nearer apart from power device can bear the electric current that is higher than rated value and sharply generate heat.Therefore the two is the subject matter during Industrial Engineering is used, and will be resolved in patent of the present invention.
Summary of the invention
The invention provides a kind of power density height, the shutoff voltage spike is little and electrochemical capacitor is difficult for the water-cooled three-phase diode-clamped three-level inverted power module of heating
The present invention is achieved by the following technical solutions:
A kind of water-cooling type power model of three-phase diode-clamped three-level inverted topology comprises:
The bottom has the bracing frame of bottom steel plate;
The electrochemical capacitor group is positioned on the bottom steel plate;
Second stack bus bar is laid on the electrochemical capacitor group, and described electrochemical capacitor group interconnects by second stack bus bar;
Water-filled radiator is erected at second stack bus bar top;
First stack bus bar is erected at water-filled radiator top, links to each other by the second absorption capacitance group respectively between first stack bus bar and the second stack bus bar corresponding toothed splicing ear;
Power device, balance resistance and voltage sensor, all between first stack bus bar and water-filled radiator and be fixed on the upper surface of water-filled radiator, power device, balance resistance and voltage sensor all interconnect by first stack bus bar;
First absorbs capacitance group, is positioned at first stack bus bar top, interconnects by first stack bus bar.
Described first stack bus bar has constituted diode-clamped three level topologys, and first stack bus bar is divided into four layers:
Orlop (the most contiguous water-filled radiator one deck) is a three-phase alternating current output busbar;
The orlop top is a direct current mid point layer;
One deck of direct current mid point layer top comprises and is in the conplane first anodal busbar and first cathode bus bar;
The superiors are the busbars that connect IGBT and clamping diode.
The splicing ear that the side of the direct current mid point layer in first stack bus bar, anodal busbar and cathode bus bar is provided with the dentation that is interspersed extends out downwards, is used for being connected with the corresponding splicing ear of second stack bus bar.
Described second stack bus bar is divided into two-layer:
Lower floor (adjacent underlayer steel plate one deck) comprises electrochemical capacitor series connection busbar and direct current mid point busbar, and wherein said direct current mid point busbar is positioned at the center, and electrochemical capacitor series connection busbar is distributed in each two of the both sides of direct current mid point busbar;
The upper strata comprises the second anodal busbar and second cathode bus bar.
The splicing ear that the side of the direct current mid point layer in second stack bus bar, anodal busbar and cathode bus bar is provided with the dentation that is interspersed extends out, and is used for being connected with the first stack bus bar corresponding toothed splicing ear.
The three-phase of first stack bus bar is linked as integral body by great area DC mid point layer, the first anodal busbar and first cathode bus bar, and upwards digs the formation splicing ear so that the second absorption capacitance group is installed in the side near power device.
Direct current input, interchange output and braking terminal (totally 8) all are positioned at the homonymy of whole water-cooling type power model, so that connect; And the Inlet and outlet water port of water-filled radiator is avoided the staggered of external water route and circuit in an opposite side of water-cooling type power model.
Described bottom steel plate is provided with the epoxy resin dividing plate, some location holes have been dug, each electric capacity in the described electrochemical capacitor group is positioned in the location hole accordingly, the terminal of each electric capacity is connected with second stack bus bar by screw, the bottom steel plate can be pulled out the power model bracing frame as drawer structure, the absorption electric capacity that only need dismantle when safeguarding between first stack bus bar and second stack bus bar just can together be extracted the bottom steel plate out together with the electrochemical capacitor group and second stack bus bar.
Handle has been installed in both sides, bracing frame upper end, is beneficial to carrying.
Beneficial effect of the present invention is as follows:
1, all power devices are installed on the monoblock water-filled radiator, improve power density greatly, can be used on narrow and small, airtight or the occasion of requirement of explosion proof is arranged.
2, stack bus bar is divided into two groups, is easy to installation and maintenance.
3, first stack bus bar and be installed near first the IGBT and absorb capacitance group and reduced power device shutoff voltage spike.
4, second stack bus bar makes the electrochemical capacitor CURRENT DISTRIBUTION even, has suppressed the electrochemical capacitor heating of close IGBT.
5, the absorption electric capacity of first stack bus bar and second stack bus bar junction installation has absorbed most of high-frequency current, has suppressed the whole heating of electrochemical capacitor.
6, input and output terminal and water nozzle are avoided the staggered of external water route and circuit at opposition side.
7, handle has been installed in both sides, bracing frame upper end, is beneficial to carrying.
Description of drawings
Be circuit topology figure of the present invention among Fig. 1 in the frame of broken lines.
Fig. 2 is the installation site figure of power device, balance resistance, temperature switch and voltage sensor on the water-filled radiator of the present invention.
Fig. 3 is a three-dimensional structure diagram of the present invention.
Fig. 4 is the three-dimensional structure diagram of the electrochemical capacitor group of the present invention and second stack bus bar.
Fig. 5 a, Fig. 5 b are the present invention's first stack bus bar positive and negative structure chart.
Fig. 6 a, Fig. 6 b are the present invention's second stack bus bar positive and negative structure chart.
Fig. 7 is the front view of Fig. 3.
Fig. 8 is the rearview of Fig. 3.
Fig. 9 is the vertical view of Fig. 3.
Embodiment
Shown in Fig. 3,4,7,8,9, the water-cooling type power model of three-phase diode-clamped three-level inverted topology comprises: the bottom has the bracing frame 2 of bottom steel plate; Electrochemical capacitor group 1 is positioned on the bottom steel plate; Second stack bus bar 5 is laid on the electrochemical capacitor group 1, and electrochemical capacitor group 1 interconnects by second stack bus bar 5; Water-filled radiator 3 is erected at second stack bus bar, 5 tops; First stack bus bar 4 is erected at water-filled radiator 3 tops, absorbs capacitance group 7 by second respectively between first stack bus bar 4 and second stack bus bar, the 5 corresponding toothed splicing ears and links to each other; First absorbs capacitance group 6, is positioned at first stack bus bar, 4 tops, is connected on first stack bus bar 4.
As shown in Figure 2, seven IGBT 23, eight fast power diodes 24 that recover, three balance resistances 25, eight temperature switches 26, four voltage sensors 27 and all interconnect by first stack bus bar 4 all between first stack bus bar 4 and water-filled radiator 3 and be fixed on the upper surface of water-filled radiator 3;
As shown in Figure 5, first stack bus bar 4 has constituted diode-clamped three level topologys, and first stack bus bar 4 is divided into four layers: orlop is three three-phase alternating current output busbars 18; The orlop top is a direct current mid point layer 15; One deck of direct current mid point layer 15 top comprises and is in the conplane first anodal busbar 14 and first cathode bus bar 16; The superiors are six busbars 17 that connect IGBT and clamping diode.
The splicing ear that direct current mid point layer 15, the first anodal busbar 14 in first stack bus bar 4 and the side of first cathode bus bar 16 are provided with the dentation that is interspersed extends out downwards, is used for being connected with second stack bus bar, 5 corresponding splicing ears.
The three-phase of first stack bus bar 4 is linked as integral body by great area DC mid point layer 15, the first anodal busbar 14 and first cathode bus bar 16, and upwards digs the formation splicing ear so that the second absorption capacitance group 7 is installed in the side near power device.
As shown in Figure 6, second stack bus bar 5 is divided into two-layer: lower floor comprises four electrochemical capacitor series connection busbars 22 and direct current mid point busbar 20, wherein said direct current mid point busbar 20 is positioned at the center, and electrochemical capacitor series connection busbar 22 is distributed in each two of the both sides of direct current mid point busbar 20; The upper strata comprises the second anodal busbar 19 and second cathode bus bar 21.
The splicing ear that direct current mid point busbar 20, the second anodal busbar 19 in second stack bus bar 5 and the side of second cathode bus bar 21 are provided with the dentation that is interspersed extends out, and is used for being connected with first stack bus bar, 4 corresponding toothed splicing ears.
Be illustrated in figure 1 as circuit theory diagrams of the present invention, as shown in Figure 9, water-cooling type power model and extraneous interface have eight: three direct current input busbars 9 (P among Fig. 6, O, N point) are three direct current input busbars, and it is connected with the second anodal busbar 19, direct current mid point busbar 20 and second cathode bus bar 21 respectively; Three-phase alternating current output busbar 10 (U among Fig. 6, V, W) is connected with three three-phase alternating current output busbars 18 respectively, passes current sensor 8 and draws; Braking busbar 11 is X, the Y among Fig. 6.Direct current input busbar 9, three-phase alternating current output busbar 10 and braking busbar 11 all are positioned at the homonymy of whole water-cooling type power model, and the Inlet and outlet water port of water-filled radiator 3 is in an opposite side of water-cooling type power model.
Described bottom steel plate is provided with the epoxy resin dividing plate, some location holes have been dug, being positioned in the location hole of each electric capacity correspondence in the described electrochemical capacitor group 1, the terminal of each electric capacity is connected with second stack bus bar 5 by screw, the bottom steel plate can be pulled out power model bracing frame 2 as drawer structure, second between first stack bus bar 4 and second stack bus bar 5 of only need dismantling when safeguarding absorbs capacitance group 7 and just the bottom steel plate together can be extracted out together with the electrochemical capacitor group 1 and second stack bus bar 5.
At first electrochemical capacitor group 1 is arranged on the bottom steel plate during installation, second stack bus bar 5 is placed successively from lower floor to upper strata: will separate with insulating paper between lower floor to the upper strata, fix, form a drawer structure as shown in Figure 2 with screw.Can earlier drawer structure be pushed in the model machine cabinet.With IGBT23, recover power diode 24, balance resistance 25, temperature switch 26 and voltage sensor 27 soon and be fixed on (as shown in Figure 5) on the water-filled radiator 3, and screw down.To separate with insulating paper between installing 4: four layers of first stack bus bars from lower floor to upper strata successively again.Then load onto first and absorb capacitance group 6.Link to each other absorbing capacitance group 7 by second respectively between first stack bus bar 4 and second stack bus bar, the 5 corresponding toothed splicing ears.Install direct current input busbar 9 at last, exchange output busbar 10 and braking busbar 11.
Claims (8)
1. the water-cooling type power model of a three-phase diode-clamped three-level inverted topology is characterized in that:
The bottom has the bracing frame of bottom steel plate;
The electrochemical capacitor group is positioned on the bottom steel plate;
Second stack bus bar is laid on the electrochemical capacitor group, and described electrochemical capacitor group interconnects by second stack bus bar;
Water-filled radiator is erected at second stack bus bar top;
First stack bus bar is erected at water-filled radiator top, links to each other by the second absorption capacitance group respectively between first stack bus bar and the second stack bus bar corresponding toothed splicing ear;
Power device, balance resistance and voltage sensor, all between first stack bus bar and water-filled radiator and be fixed on the upper surface of water-filled radiator, power device, balance resistance and voltage sensor all interconnect by first stack bus bar;
First absorbs capacitance group, is positioned at first stack bus bar top, is connected on first stack bus bar.
2. water-cooling type power model according to claim 1 is characterized in that: first stack bus bar has constituted diode-clamped three level topologys, and first stack bus bar is divided into four layers:
Orlop is a three-phase alternating current output busbar;
The orlop top is a direct current mid point layer;
One deck of direct current mid point layer top comprises and is in the conplane first anodal busbar and first cathode bus bar;
The superiors are the busbars that connect IGBT and clamping diode.
The splicing ear that the side of the direct current mid point layer in first stack bus bar, the first anodal busbar and first cathode bus bar is provided with the dentation that is interspersed extends out downwards, is used for being connected with the corresponding splicing ear of second stack bus bar.
3. water-cooling type power model according to claim 1 is characterized in that: second stack bus bar is divided into two-layer:
Lower floor comprises electrochemical capacitor series connection busbar and direct current mid point busbar, and wherein said direct current mid point busbar is positioned at the center, and electrochemical capacitor series connection busbar is distributed in each two of the both sides of direct current mid point busbar;
The upper strata comprises the second anodal busbar and second cathode bus bar.
4. water-cooling type power model according to claim 1, it is characterized in that: the splicing ear that the side of the direct current mid point layer in second stack bus bar, anodal busbar and cathode bus bar is provided with the dentation that is interspersed extends out, and is used for being connected with the first stack bus bar corresponding toothed splicing ear.
5. water-cooling type power model according to claim 1, it is characterized in that: the three-phase of first stack bus bar is linked as integral body by great area DC mid point layer, anodal busbar and cathode bus bar, and upwards digs the formation splicing ear so that the first absorption capacitance group is installed in the side near power device.
6. water-cooling type power model according to claim 1 is characterized in that: direct current input, interchange output and braking terminal all are positioned at the homonymy of whole water-cooling type power model, so that connect; And the Inlet and outlet water port of water-filled radiator is avoided the staggered of external water route and circuit in an opposite side of water-cooling type power model.
7. water-cooling type power model according to claim 1, it is characterized in that: described bottom steel plate is provided with the epoxy resin dividing plate, some location holes have been dug, being positioned in the location hole of each electric capacity correspondence in the described electrochemical capacitor group, the terminal of each electric capacity is connected with second stack bus bar by screw, the bottom steel plate can be pulled out the power model bracing frame as drawer structure, the absorption electric capacity that only need dismantle when safeguarding between first stack bus bar and second stack bus bar just can together be extracted the bottom steel plate out together with the electrochemical capacitor group and second stack bus bar.
8. water-cooling type power model according to claim 1 is characterized in that: handle has been installed in both sides, bracing frame upper end.
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| CN 201010108637 CN101741227B (en) | 2010-02-08 | 2010-02-08 | Water-cooled three-phase diode-clamped three-level inverted power module |
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| CN 201010108637 CN101741227B (en) | 2010-02-08 | 2010-02-08 | Water-cooled three-phase diode-clamped three-level inverted power module |
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| CN102163926A (en) * | 2010-12-31 | 2011-08-24 | 中电普瑞科技有限公司 | High-power converter based on parallel IGBT (Insulated Gate Bipolar Transistor) modules |
| CN102290242A (en) * | 2011-08-10 | 2011-12-21 | 联合汽车电子有限公司 | Heat dispersion structure and method of thin film capacitor |
| CN102684597A (en) * | 2012-05-23 | 2012-09-19 | 东方电气集团东风电机有限公司 | High-power alternating current (AC) asynchronous motor controller for direct driving type bus |
| WO2012122881A1 (en) * | 2011-03-16 | 2012-09-20 | 辽宁荣信防爆电气技术有限公司 | Power unit in which power device sharing one water-cooling plate with capacitor |
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