CN105429481A - Parallel connection device of power module, converter and inverter - Google Patents
Parallel connection device of power module, converter and inverter Download PDFInfo
- Publication number
- CN105429481A CN105429481A CN201510900285.9A CN201510900285A CN105429481A CN 105429481 A CN105429481 A CN 105429481A CN 201510900285 A CN201510900285 A CN 201510900285A CN 105429481 A CN105429481 A CN 105429481A
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- China
- Prior art keywords
- positive
- contiguous block
- negative busbar
- power model
- shunting means
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- 239000003990 capacitor Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 7
- 238000013461 design Methods 0.000 abstract description 9
- 230000010355 oscillation Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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
- 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
Abstract
The embodiment of the invention provides a parallel device of a power module, a converter and an inverter. The power modules comprise positive and negative busbars, and the positive and negative busbars corresponding to the adjacent power modules are connected in a one-to-one correspondence manner through connecting blocks; the equivalent resistance value of the connecting block is different from the equivalent resistance value of the positive and negative busbars. The parallel device of the power module, the converter and the inverter have simple design and low cost, and effectively reduce the oscillation current among the power modules without additionally increasing components, thereby prolonging the service life of the power module.
Description
Technical field
The present invention relates to Semiconductor Converting Technology field, particularly relate to a kind of shunting means of power model and current transformer and inverter.
Background technology
Along with the development of power electronic technology, in the current transformer or frequency converter of the large scale electrical power units such as wind turbine generator, the DC bus support capacitor that adopts carrys out energy exchange between buffered DC power supply and load, stable DC busbar voltage more.In order to adapt to the raising of current transformer power grade, and increase Converter Capacity, all requirement is improved, to optimize the layout of current transformer to the maintainability of the design of current transformer, modularization, multicomponent device Parallel Design.
The modularized design of current transformer inside, mainly through forming power model by DC bus support capacitor, then by bus by power module parallel together with power electronic device.But because the existence of circuit stray inductance may cause resonance, make the oscillating current of DC bus support capacitor increase, thus increase the thermal losses that this oscillating current produces, this can affect the life-span of capacitor, thus affects the steady operation of current transformer.
Existing solution mainly increases single shunt capacitor capacity, changes line electricity capacitance, to increase the tolerance oscillating current value of Capacitor banks itself.To adapt capacitor for current transformer global design, its volume and size are specific, and the excursion of capacitance is very limited.If change large value capacitor, just need the overall volume increasing current transformer, this will relate to the change of current transformer global design scheme, and greatly increase construction cycle and cost drop into, and therefore, this method is difficult to popularize.
Desirable device is not also had to effectively reduce oscillating current in prior art.
Summary of the invention
The object of the present invention is to provide a kind of shunting means of power model and current transformer and inverter, to reduce the oscillating current of DC bus support capacitor.
For reaching above-mentioned purpose, the invention provides a kind of shunting means of power model, described power model comprises positive and negative busbar, and the positive and negative busbar that adjacent described power model is corresponding is connected correspondingly by contiguous block; The equivalent resistance of described contiguous block is different from the equivalent resistance of described positive and negative busbar.
Further, described power model comprises at least two positive and negative busbars, and the contiguous block between described adjacent power module is one-body molded; One-body molded or the interval of described at least two positive and negative busbars is arranged.
Further, the equivalent resistance of described contiguous block is greater than the equivalent resistance of described positive and negative busbar; Further, described contiguous block cross-sectional area that is identical with the material of described positive and negative busbar and described contiguous block is less than the cross-sectional area of described positive and negative busbar; Or the material of described contiguous block and described positive and negative busbar is identical respectively with size, and described contiguous block overcoat is magnetic part.
Further, the cross-sectional area of described contiguous block is greater than default cross-sectional area threshold value.
Further, described magnetic part is magnet ring.
Further, described contiguous block comprises inductance; Or described contiguous block comprises reactor; Or described contiguous block comprises reactor parallel with one another and inductance; Or described contiguous block comprises reactor and the inductance of series connection mutually.
Further, the through-current capacity of described inductance is greater than the through-current capacity of described positive and negative busbar; Or the through-current capacity of described reactor is greater than the through-current capacity of described positive and negative busbar; Or total through-current capacity of described reactor parallel with one another and inductance is greater than the through-current capacity of described positive and negative busbar; Or the reactor of described mutual series connection and total through-current capacity of inductance are greater than the through-current capacity of described positive and negative busbar.
Further, described power model comprises stack bus bar and capacitor, and described capacitor is arranged on described stack bus bar, and described stack bus bar is connected with described positive and negative busbar.
According to a further aspect in the invention, also provide a kind of current transformer, comprise the shunting means of foregoing power model.
According to a further aspect in the invention, also provide a kind of inverter, comprise the shunting means of foregoing power model.
The shunting means of the power model that the embodiment of the present invention provides and current transformer and inverter, by using special contiguous block, power module parallel is connected, contiguous block is made to have larger equivalent resistance compared with power model, or change the condition of resonance of circuit, efficiently reduce the oscillating current between power model, and then improve the useful life of power model.
Accompanying drawing explanation
Fig. 1 is the structural representation of the shunting means of power model in the embodiment of the present invention;
Fig. 2 is the structural representation of the power model in the embodiment of the present invention.
Drawing reference numeral illustrates:
1, stack bus bar; 2, capacitor; 3, positive and negative busbar; 4, power electronic device; 5, power model; 6, contiguous block.
Embodiment
Below in conjunction with accompanying drawing, the shunting means of the power model of the embodiment of the present invention and current transformer and inverter are described in detail.
Embodiment one
Fig. 1 is the structural representation of the shunting means of the power model of the embodiment of the present invention, and the shunting means of this power model can as the internal structure of high-power electric appliance equipment, the electric equipments such as such as current transformer, frequency converter or inverter.
As shown in Figure 1, the shunting means of this power model comprises the power model 5 of multiple parallel connection, power model 5 comprises positive and negative busbar 3, the positive and negative busbar 3 of adjacent power module 5 correspondence is connected correspondingly by contiguous block 6, wherein, the equivalent resistance of contiguous block 6 is different from the equivalent resistance of positive and negative busbar 3.
In the present embodiment, all there is equivalent resistance in power model 5 and the jockey (such as positive and negative busbar 3 or contiguous block 6) for connecting power model 5, and determined by the inherent characteristic of itself, the circuit of transmission current can be caused to there is stray inductance and produce vibration.If power model 5 and between the equivalent resistance of jockey less, then circuit oscillation can be comparatively large, and the oscillating current that circuit is produced comparatively greatly, and damages circuit element.
Alternatively, by increasing the equivalent resistance of power model 5 or jockey, the oscillating current in circuit can be reduced.But increase the equivalent resistance of power model 5, the global design of the electric equipment that itself and power model can be caused to apply produces and conflicts, and increase cost input, therefore, this method is not easily implemented.And increase the equivalent resistance of jockey, can circuit oscillation be alleviated, and then reduce the oscillating current in circuit.To increase the equivalent resistance of jockey, can by its internal structure of adjustment or global shape, the method that its resistance value or inductance value are changed realizes.
The present invention is based on this feature, increase the equivalent resistance of contiguous block, reduce the oscillating current in circuit, and increase the useful life of power model 5 and extend the maintenance period of circuit.
Particularly, positive busbar in the positive and negative busbar 3 of adjacent power module 5 and between positive busbar, and between negative busbar and negative busbar, be all connected with the contiguous block 6 different from the equivalent resistance of positive busbar and negative busbar, positive and negative busbar 3 is connected one to one formation parallel circuits.Wherein the equivalent resistance of contiguous block 6 is preferably greater than the equivalent resistance of positive and negative busbar 3, to reduce current oscillation largely, and then provides safer running environment for power model 5.
In the present embodiment, power model 5 comprises stack bus bar 1 and capacitor 2, and capacitor 2 is arranged on stack bus bar 1, and stack bus bar 1 is connected with positive and negative busbar 3.As shown in Figure 2, multiple capacitor 2 is arranged on stack bus bar 1 side by side, and connects to form the entirety of power model 5 with power electronic device 4 (such as IGBT module).Stack bus bar 1 is connected with positive and negative busbar 3, wherein the quantity of positive busbar and negative busbar should one_to_one corresponding, and is determined by the through-current capacity between adjacent power module 5.Alternatively, positive and negative busbar 3 is provided with the connector matched with contiguous block 6, to connect positive and negative busbar 3 and contiguous block 6 quickly and easily.
In order to make the shunting means of this power model can be applied to more specific environment, correspondingly can adjust the connected mode of the positive and negative busbar 3 of power model 5 and contiguous block 6.Such as, power model 5 comprises at least two positive and negative busbars 3, and these at least two positive and negative busbar 3 intervals are arranged, contiguous block 6 between adjacent power module 5 is one-body molded, be about at least two (or multiple) contiguous blocks 6 and be designed to the larger integrated connection block of a shape, it is still provided with and the corresponding connector connected of multiple positive and negative busbars 3, is connected with positive and negative busbar 3 to facilitate it.
Again such as, power model 5 comprises at least two positive and negative busbars 3, and these at least two positive and negative busbars 3 are one-body molded, contiguous block 6 between adjacent power module 5 is also one-body molded, be about at least two (or multiple) positive and negative busbars 3 and be designed to the larger busbar of a shape, it is still provided with multiple positive and negative connector; Meanwhile, multiple contiguous block 6 is also designed to the larger integrated connection block of a shape, and connector is set thereon, for one-body molded after the positive and negative connector of busbar be connected.
When the equivalent resistance of control connection block 6 is greater than the equivalent resistance of positive and negative busbar 3, contiguous block that material is identical 6 and positive and negative busbar 3 can be selected, and the cross-sectional area of contiguous block 6 is designed to the cross-sectional area being less than positive and negative busbar 3.Adopt the contiguous block 6 that cross-sectional area is less, because its equivalent resistance is comparatively large, therefore only can produce less oscillating current in circuit.Such as, positive and negative busbar 3 is copper bar, then contiguous block 6 can elect the copper billet that cross-sectional area is less than the cross-sectional area of this copper bar as, and the cross-sectional area of copper billet should be larger with the cross-sectional area difference of copper bar.
But if the cross-sectional area of contiguous block 6 is too small, and through-current capacity required between adjacent power module 5 is comparatively large, when the ampacity of contiguous block 6 is larger, is easily burnt out by contiguous block 6, thus affects the normal work of power model 5.Therefore, the cross-sectional area of contiguous block 6 can not be too small, but be greater than (contiguous block 6) default cross-sectional area threshold value, and this default cross-sectional area threshold value can be understood as the cross-sectional area needed for regulation temperature rise.Wherein, temperature rise refers to that all parts in electronic electric equipment exceeds the temperature of environment.Rear generation current thermal effect that conductor is through-flow, As time goes on, the temperature of conductive surface constantly rises until stable.Stable condition is that the front and back temperature difference is no more than 2 DEG C in 3 hours, the final temperature of the temperature now recording conductive surface conductor for this reason, this portion temperature exceeding the temperature (i.e. ambient temperature) of surrounding air in the temperature risen is called temperature rise, and the unit of temperature rise is Kelvin (K).Heat condition when the cross-sectional area threshold value needed for regulation temperature rise of contiguous block 6 depends on that contiguous block 6 works and heat dispersal situations.
By increasing the mode of the equivalent resistance of contiguous block 6 in this enforcement, effectively can reduce the oscillating current that circuit produces, and the caloric value of capacitor is reduced greatly, and contiguous block 6 draw materials simple, with low cost, when not increasing additional element, the useful life of the shunting means of this power model can be improved, being easy to universal in all kinds of electric equipment and implementing.
If contiguous block 6 is all identical with size with the material of positive and negative busbar 3, can at the outer sheathed magnetic part of contiguous block 6, increase circuit equivalent inductance value (being equivalent to increase equivalent resistance), and then change condition of resonance, but this method likely can make oscillating current decline, also likely oscillating current is increased, more difficult Selection parameter.
Contiguous block 6 can also be chosen as inductance or reactor.Alternatively, contiguous block 6 can comprise inductance, and in this scheme, the through-current capacity of inductance is greater than the through-current capacity of positive and negative busbar 3.Or contiguous block 6 can comprise reactor, in this scheme, the through-current capacity of reactor is greater than the through-current capacity of positive and negative busbar 3.Again or, contiguous block 6 can comprise reactor parallel with one another and inductance, and total through-current capacity of reactor parallel with one another in this scheme and inductance is greater than the through-current capacity of positive and negative busbar 3.Or contiguous block 6 can comprise reactor and the inductance of series connection mutually, in this scheme, the reactor of series connection and total through-current capacity of inductance are greater than the through-current capacity of positive and negative busbar 3 mutually.Principle is the same.
When the equivalent resistance of control connection block 6 is less than the equivalent resistance of positive and negative busbar 3, contiguous block 6 can be chosen as larger stack bus bar.This kind of method is applicable to connect three phase power module, makes only to there is very little stray inductance in circuit, and the oscillating current of generation also can be smaller.
According to a further aspect in the invention, a kind of current transformer and inverter are also provided, this current transformer or inverter adopt the shunting means of above-mentioned power model as internal structure, by using the contiguous block 6 through special processing that power model 5 is in parallel, the oscillating current that when efficiently reducing current transformer/invertor operation, its internal circuit produces, considerably increases its useful life.Meanwhile, this current transformer or inverter also have simplicity of design, compact conformation, the advantage such as with low cost.
It may be noted that the needs according to implementing, all parts described can be split as more multi-part, also the part operation of two or more parts or parts can be combined into new parts, to realize object of the present invention in the application.
The shunting means of the power model of the embodiment of the present invention and current transformer is adopted to have following technique effect with inverter: power module parallel to be connected by using special contiguous block, efficiently reduce the oscillating current between power model, and then improve the useful life of power model; This programme does not additionally increase components and parts, simultaneously simplicity of design, compact conformation and with low cost, easily universally in all kinds of electric equipment implements.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of described claim.
Claims (10)
1. a shunting means for power model, described power model (5) comprises positive and negative busbar (3), it is characterized in that,
The positive and negative busbar (3) of adjacent described power model (5) correspondence is connected correspondingly by contiguous block (6);
The equivalent resistance of described contiguous block (6) is different from the equivalent resistance of described positive and negative busbar (3).
2. shunting means according to claim 1, is characterized in that,
Described power model (5) comprises at least two positive and negative busbars (3), and the contiguous block (6) between described adjacent power module (5) is one-body molded;
One-body molded or the interval of described at least two positive and negative busbars (3) is arranged.
3. shunting means according to claim 1, is characterized in that, the equivalent resistance of described contiguous block (6) is greater than the equivalent resistance of described positive and negative busbar (3); Further, described contiguous block (6) cross-sectional area that is identical with the material of described positive and negative busbar (3) and described contiguous block (6) is less than the cross-sectional area of described positive and negative busbar (3); Or,
The material of described contiguous block (6) and described positive and negative busbar (3) is identical respectively with size, and described contiguous block (6) overcoat is magnetic part.
4. shunting means according to claim 3, is characterized in that, the cross-sectional area of described contiguous block (6) is greater than default cross-sectional area threshold value.
5. shunting means according to claim 3, is characterized in that, described magnetic part is magnet ring.
6. shunting means according to claim 1, is characterized in that, described contiguous block (6) comprises inductance; Or described contiguous block (6) comprises reactor; Or described contiguous block (6) comprises reactor parallel with one another and inductance; Or described contiguous block (6) comprises reactor and the inductance of series connection mutually.
7. shunting means according to claim 6, is characterized in that, the through-current capacity of described inductance is greater than the through-current capacity of described positive and negative busbar (3); Or,
The through-current capacity of described reactor is greater than the through-current capacity of described positive and negative busbar (3); Or,
Total through-current capacity of described reactor parallel with one another and inductance is greater than the through-current capacity of described positive and negative busbar (3); Or,
The reactor of described mutual series connection and total through-current capacity of inductance are greater than the through-current capacity of described positive and negative busbar (3).
8. shunting means according to any one of claim 1 to 7, it is characterized in that, described power model (5) comprises stack bus bar (1) and capacitor (2), described capacitor (2) is arranged on described stack bus bar (1), and described stack bus bar (1) is connected with described positive and negative busbar (3).
9. a current transformer, is characterized in that, comprises the shunting means of the power model according to any one of claim 1 to 8.
10. an inverter, is characterized in that, comprises the shunting means of the power model according to any one of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510900285.9A CN105429481B (en) | 2015-12-08 | 2015-12-08 | Parallel connection device of power module, converter and inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510900285.9A CN105429481B (en) | 2015-12-08 | 2015-12-08 | Parallel connection device of power module, converter and inverter |
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| Publication Number | Publication Date |
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| CN105429481A true CN105429481A (en) | 2016-03-23 |
| CN105429481B CN105429481B (en) | 2018-10-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382601A (en) * | 2021-06-02 | 2021-09-10 | 江苏云意电气股份有限公司 | 48V BSG motor integrated inverter |
| CN113708668A (en) * | 2021-09-27 | 2021-11-26 | 中车青岛四方车辆研究所有限公司 | Discrete IGBT parallel power assembly and dual-motor driving system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120199847A1 (en) * | 2011-02-08 | 2012-08-09 | Kabushiki Kaisha Toshiba | Semiconductor device |
| CN104767397A (en) * | 2015-03-25 | 2015-07-08 | 北京天诚同创电气有限公司 | IGBT module parallel structure and power module structure |
| CN104779818A (en) * | 2015-04-24 | 2015-07-15 | 永济新时速电机电器有限责任公司 | Inverter chopping wave composite busbar suitable for standardizing traction power module of electric motor unit |
-
2015
- 2015-12-08 CN CN201510900285.9A patent/CN105429481B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120199847A1 (en) * | 2011-02-08 | 2012-08-09 | Kabushiki Kaisha Toshiba | Semiconductor device |
| CN104767397A (en) * | 2015-03-25 | 2015-07-08 | 北京天诚同创电气有限公司 | IGBT module parallel structure and power module structure |
| CN104779818A (en) * | 2015-04-24 | 2015-07-15 | 永济新时速电机电器有限责任公司 | Inverter chopping wave composite busbar suitable for standardizing traction power module of electric motor unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382601A (en) * | 2021-06-02 | 2021-09-10 | 江苏云意电气股份有限公司 | 48V BSG motor integrated inverter |
| CN113708668A (en) * | 2021-09-27 | 2021-11-26 | 中车青岛四方车辆研究所有限公司 | Discrete IGBT parallel power assembly and dual-motor driving system |
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| Publication number | Publication date |
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| CN105429481B (en) | 2018-10-23 |
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