CN105429481B - Parallel connection device of power module, converter and inverter - Google Patents
Parallel connection device of power module, converter and inverter Download PDFInfo
- Publication number
- CN105429481B CN105429481B CN201510900285.9A CN201510900285A CN105429481B CN 105429481 B CN105429481 B CN 105429481B CN 201510900285 A CN201510900285 A CN 201510900285A CN 105429481 B CN105429481 B CN 105429481B
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- China
- Prior art keywords
- power module
- link block
- negative busbar
- positive negative
- positive
- Prior art date
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Links
- 239000003990 capacitor Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000630 rising effect Effects 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 the shunting means and current transformer of Semiconductor Converting Technology field more particularly to a kind of power module and inversions
Device.
Background technology
With the continuous development of power electronic technique, the current transformer in large scale electrical power units such as wind power generating sets or frequency conversion
In device, mostly uses DC bus support capacitor and come energy exchange between buffered DC power supply and load, stable DC busbar electricity
Pressure.In order to adapt to the raising of current transformer power grade, and increase Converter Capacity, maintainability, mould to the design of current transformer
Block, multicomponent device Parallel Design improve requirement, to optimize the layout of current transformer.
Modularized design inside current transformer, mainly by by DC bus support capacitor together with power electronic devices
Group success rate module, then by busbar by power module parallel.But due to the presence of circuit stray inductance may cause it is humorous
It shakes, the oscillating current of DC bus support capacitor is made to increase, to increase thermal losses caused by the oscillating current, this meeting
The service life for influencing capacitor, to influence the steady operation of current transformer.
Existing solution mainly increases single shunt capacitor capacity, changes line electricity capacitance, to increase capacitance
The tolerance oscillating current value of device group itself.It is adapted for capacitor for current transformer global design, volume is with size
Specifically, the variation range of capacitance is extremely limited.If changing large value capacitor, it is necessary to increase the entirety of current transformer
Volume, this will be related to the variation of current transformer global design scheme, and greatly increase development cycle and cost input, because
This, this method is difficult to popularize.
There are no ideal devices can effectively reduce oscillating current in the prior art.
Invention content
The purpose of the present invention is to provide a kind of shunting means of power module and current transformers and inverter, to reduce direct current
The oscillating current of busbar support capacitor.
In order to achieve the above object, the present invention provides a kind of shunting means of power module, the power module includes positive and negative mother
Row, the corresponding positive negative busbar of the adjacent power module are connected correspondingly by link block；The equivalent electricity of the link block
Resistance value is different from the equivalent resistance of positive negative busbar.
Further, the power module includes at least two positive negative busbars, the connection between the adjacent power module
Block is integrally formed；At least two positive negative busbar is integrally formed or interval setting.
Further, the equivalent resistance of the link block is more than the equivalent resistance of the positive negative busbar；Also, it is described
Link block is identical as the material of positive negative busbar and the cross-sectional area of the link block is less than the transversal of the positive negative busbar
Area；Alternatively, the link block is identical as the material and size difference of positive negative busbar and the link block outside be cased with magnetic
Property part.
Further, the cross-sectional area of the link block is more than default cross-sectional area threshold value.
Further, the magnetic part is magnet ring.
Further, the link block includes inductance；Alternatively, the link block includes reactor；Alternatively, the link block
Including reactor and inductance parallel with one another；Alternatively, the link block includes the reactor and inductance being serially connected.
Further, the through-current capacity of the inductance is more than the through-current capacity of the positive negative busbar；Alternatively, the reactor is logical
Flow is more than the through-current capacity of the positive negative busbar；Alternatively, total through-current capacity of the reactor and inductance parallel with one another is more than institute
State the through-current capacity of positive negative busbar；Alternatively, total through-current capacity of the reactor being serially connected and inductance is more than the positive negative busbar
Through-current capacity.
Further, the power module includes stack bus bar and capacitor, and it is female that the capacitor is mounted on the lamination
On row, the stack bus bar is connect with the positive negative busbar.
According to another aspect of the present invention, a kind of current transformer is also provided, including foregoing power module and multi pack
It sets.
According to another aspect of the present invention, a kind of inverter is also provided, including foregoing power module and multi pack
It sets.
The shunting means and current transformer and inverter of power module provided in an embodiment of the present invention, by using special company
It connects block to connect power module parallel, makes link block that there is larger equivalent resistance compared with power module, or change circuit
Condition of resonance efficiently reduces the oscillating current between power module, and then improves the service life of power module.
Description of the drawings
Fig. 1 is the structural schematic diagram of the shunting means of the power module in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of the power module in the embodiment of the present invention.
Drawing reference numeral explanation：
1, stack bus bar；2, capacitor；3, positive negative busbar；4, power electronic devices；5, power module；6, link block.
Specific implementation mode
The shunting means to the power module of the embodiment of the present invention and current transformer carry out detailed with inverter below in conjunction with the accompanying drawings
Thin description.
Embodiment one
Fig. 1 be the embodiment of the present invention power module shunting means structural schematic diagram, the power module and multi pack
Setting can be as electrical equipments such as the internal structures of high-power electric appliance equipment, such as current transformer, frequency converter or inverter.
As shown in Figure 1, the shunting means of the power module includes the power module 5 of multiple parallel connections, power module 5 includes just
Negative busbar 3, the corresponding positive negative busbar 3 of adjacent power module 5 are connected correspondingly by link block 6, wherein link block 6
Equivalent resistance is different from the equivalent resistance of positive negative busbar 3.
In the present embodiment, power module 5 and for connect power module 5 attachment device (such as positive negative busbar 3 or even
Connect block 6) all there is equivalent resistance, and determined by the inherent characteristic of itself, causing the circuit of transmission electric current, there are stray electricals
Feel and generates oscillation.If power module 5 and between attachment device equivalent resistance it is smaller, circuit oscillation can be larger,
Keep the oscillating current that circuit generates larger, and damages circuit element.
Optionally, by increasing the equivalent resistance of power module 5 or attachment device, the oscillation electricity in circuit can be reduced
Stream.But increase the equivalent resistance of power module 5, the entirety of its electrical equipment applied with power module can be caused to set
Meter generates conflict, and increases cost input, and therefore, this method is not easy to implement.And increase the equivalent resistance of attachment device, it can
To mitigate circuit oscillation, and then reduce the oscillating current in circuit.To increase the equivalent resistance of attachment device, can pass through
Its internal structure or global shape are adjusted, its resistance value or the changed method of inductance value is made to realize.
The present invention is based on this features, increase the equivalent resistance of link block, to reduce the oscillating current in circuit, and increase
Add the service life of power module 5 and extends the maintenance period of circuit.
Specifically, between the positive busbar and positive busbar in the positive negative busbar 3 of adjacent power module 5 and negative busbar with it is negative
Between busbar, it is respectively connected with the link block 6 different from the equivalent resistance of positive busbar and negative busbar, makes positive negative busbar 3 one by one
It is correspondingly connected with to form parallel circuit.The equivalent resistance of wherein link block 6 is preferably greater than the equivalent resistance of positive negative busbar 3,
Largely to reduce current oscillation, and then safer running environment is provided for power module 5.
In the present embodiment, power module 5 includes stack bus bar 1 and capacitor 2, and capacitor 2 is mounted on stack bus bar 1,
Stack bus bar 1 is connect with positive negative busbar 3.As shown in Fig. 2, multiple capacitors 2 are mounted side by side on stack bus bar 1, and with electricity
The entirety of power electronic device 4 (such as IGBT module) connection group success rate module 5.Positive negative busbar 3 is connected on stack bus bar 1,
Wherein the quantity of positive busbar and negative busbar should correspond, and be determined by the through-current capacity between adjacent power module 5.It is optional
Ground, be provided in positive negative busbar 3 with 6 matched connector of link block, conveniently and efficiently to connect positive negative busbar 3 and connect
Block 6.
It, can be to power module 5 in order to make the shunting means of the power module can be applied to more specific environments
Positive negative busbar 3 and the connection type of link block 6 are correspondingly adjusted.For example, power module 5 includes at least two positive negative busbars
3, and the setting of at least two positive negative busbar 3 interval, the link block 6 between adjacent power module 5 are integrally formed, i.e., it will at least two
A (or multiple) link block 6 is designed as the larger integrated connection block of a shape, is still provided with thereon and multiple positive negative busbars 3
The connector being correspondingly connected with, to facilitate it to be connect with positive negative busbar 3.
For another example power module 5 includes at least two positive negative busbars 3, and at least two positive negative busbar 3 is integrally formed,
Link block 6 between adjacent power module 5 is also integrally formed, i.e., at least two (or multiple) just negative busbar 3 is designed to one
The larger busbar of shape is still provided with multiple positive and negative connectors thereon；Meanwhile multiple link blocks 6 are also configured as a shape
The larger integrated connection block of shape, and connector is set on it, for being connect with the positive and negative connector of the busbar after integrated molding.
When the equivalent resistance for controlling link block 6 is more than the equivalent resistance of positive negative busbar 3, material can be selected identical
Link block 6 and positive negative busbar 3, and the cross-sectional area of link block 6 is designed as the cross-sectional area less than positive negative busbar 3.Using
The smaller link block 6 of cross-sectional area only will produce smaller oscillating current since its equivalent resistance is larger in circuit.
For example, positive negative busbar 3 is copper bar, then link block 6 can be selected as copper billet of the cross-sectional area less than the cross-sectional area of the copper bar, and copper
The cross-sectional area of block should be larger with the cross-sectional area difference of copper bar.
But if the cross-sectional area of link block 6 is too small, and through-current capacity required between adjacent power module 5 is larger, connection
In the case that the current-carrying capacity of block 6 is larger, it is easy to burn out link block 6, to influence the normal work of power module 5.Therefore, even
The cross-sectional area for connecing block 6 cannot be too small, but is greater than (link block 6) and presets cross-sectional area threshold value, the default cross-sectional area
Threshold value can be understood as the cross-sectional area needed for regulation Wen Sheng.Wherein, Wen Sheng refers to that all parts in electronic electric equipment are high
Go out the temperature of environment.Heating effect of current is generated after conductor is through-flow, over time, the temperature of conductive surface constantly rises
Until stablizing.Stable condition is that the front and back temperature difference is no more than 2 DEG C within 3 hours, measures the temperature of conductive surface at this time thus
The final temperature of conductor, be more than in the temperature of rising the temperature (i.e. environment temperature) of surrounding air this portion temperature be known as it is warm
It rises, the unit of Wen Sheng is Kelvin (K).When cross-sectional area threshold value needed for the regulation Wen Sheng of link block 6 depends on the work of link block 6
Heat condition and heat dispersal situations.
In this implementation by way of increasing the equivalent resistance of link block 6, shaking for circuit generation can be effectively reduced
Electric current is swung, and the calorific value of capacitor is made to greatly reduce, and the materials of link block 6 are simple, it is of low cost, it can not increase
In the case of additional element, the service life of the shunting means of the power module is improved, is easy to popularize in all kinds of electrical equipments
Implement.
If the material and size all same of link block 6 and positive negative busbar 3, it can be arranged magnetic part outside link block 6, increase
Circuit equivalent inductance value (is equivalent to and increases equivalent resistance), and then changes condition of resonance, but this method is possible to make
Oscillating current declines, it is also possible to increase oscillating current, it is more difficult to selection parameter.
Link block 6 is it is also an option that be inductance or reactor.Optionally, link block 6 may include inductance, electric in this scheme
The through-current capacity of sense is more than the through-current capacity of positive negative busbar 3.Alternatively, link block 6 may include reactor, reactor is logical in this scheme
Flow is more than the through-current capacity of positive negative busbar 3.Again alternatively, link block 6 may include reactor and inductance parallel with one another, this scheme
In reactor and inductance parallel with one another total through-current capacity be more than positive negative busbar 3 through-current capacity.Or link block 6 can wrap
The reactor and inductance being serially connected are included, total through-current capacity of the reactor and inductance that are serially connected in this scheme is more than positive negative busbar
3 through-current capacity.Principle is same as above.
When the equivalent resistance for controlling link block 6 is less than the equivalent resistance of positive negative busbar 3, link block 6 can be selected
It is selected as larger stack bus bar.Such method is suitable for connection three phase power module, makes the stray electrical that very little is only existed in circuit
Sense, the oscillating current of generation also can be smaller.
According to another aspect of the present invention, a kind of current transformer and inverter are also provided, the current transformer or inverter are using upper
The shunting means for the power module stated as internal structure, by using the link block 6 Jing Guo specially treated by power module 5 simultaneously
Connection, the oscillating current that internal circuit generates when efficiently reducing current transformer/invertor operation considerably increase it and use the longevity
Life.Meanwhile the current transformer or inverter also have many advantages, such as that design is simple, compact-sized, of low cost.
It may be noted that according to the needs of implementation, all parts described in this application can be split as more multi-part, also may be used
The part operation of two or more components or component is combined into new component, to achieve the object of the present invention.
It is had the following technical effect that with inverter using the shunting means and current transformer of the power module of the embodiment of the present invention：
Power module parallel is connected by using special link block, efficiently reduces the oscillating current between power module, in turn
Improve the service life of power module；This programme does not increase component additionally, at the same design it is simple, compact-sized and at
This is cheap, easily universal in all kinds of electrical equipments to implement.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. a kind of shunting means of power module, the power module (5) includes positive negative busbar (3), which is characterized in that
The corresponding positive negative busbar (3) of the adjacent power module (5) is connected correspondingly by link block (6)；
The equivalent resistance of the link block (6) is different from the positive equivalent resistance of negative busbar (3), the power module
(5) attachment device includes positive negative busbar (3) and link block (6) to increase the equivalent resistance of attachment device.
2. shunting means according to claim 1, which is characterized in that
The power module (5) includes at least two positive negative busbars (3), the link block (6) between the adjacent power module (5)
It is integrally formed；
At least two positive negative busbar (3) is integrally formed or interval setting.
3. shunting means according to claim 1, which is characterized in that the equivalent resistance of the link block (6) is more than institute
State the equivalent resistance of positive negative busbar (3)；Also, the link block (6) is identical as the positive material of negative busbar (3) and institute
The cross-sectional area for stating link block (6) is less than the cross-sectional area of the positive negative busbar (3)；Alternatively,
The link block (6) is identical as the positive material and size difference of negative busbar (3) and link block (6) housing
Be magnetic part.
4. shunting means according to claim 3, which is characterized in that the cross-sectional area of the link block (6) is more than default
Cross-sectional area threshold value.
5. shunting means according to claim 3, which is characterized in that the magnetic part is magnet ring.
6. shunting means according to claim 1, which is characterized in that the link block (6) includes inductance；Alternatively, described
Link block (6) includes reactor；Alternatively, the link block (6) includes reactor and inductance parallel with one another；Alternatively, the company
It includes the reactor and inductance being serially connected to connect block (6).
7. shunting means according to claim 6, which is characterized in that the through-current capacity of the inductance is more than the positive negative busbar
(3) through-current capacity；Alternatively,
The through-current capacity of the reactor is more than the through-current capacity of the positive negative busbar (3)；Alternatively,
Total through-current capacity of the reactor and inductance parallel with one another is more than the through-current capacity of the positive negative busbar (3)；Alternatively,
Total through-current capacity of the reactor being serially connected and inductance is more than the through-current capacity of the positive negative busbar (3).
8. shunting means according to any one of claim 1 to 7, which is characterized in that the power module (5) includes folded
Layer busbar (1) and capacitor (2), the capacitor (2) are mounted on the stack bus bar (1), the stack bus bar (1) and institute
State positive negative busbar (3) connection.
9. a kind of current transformer, which is characterized in that include such as power module described in any item of the claim 1 to 8 and multi pack
It sets.
10. a kind of inverter, which is characterized in that include such as power module described in any item of the claim 1 to 8 and multi pack
It sets.
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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105429481A CN105429481A (en) | 2016-03-23 |
| CN105429481B true CN105429481B (en) | 2018-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510900285.9A Active CN105429481B (en) | 2015-12-08 | 2015-12-08 | Parallel connection device of power module, converter and inverter |
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|---|---|
| CN (1) | CN105429481B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113382601B (en) * | 2021-06-02 | 2022-08-16 | 潍坊佩特来电器有限公司 | 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 (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012182438A (en) * | 2011-02-08 | 2012-09-20 | Toshiba Corp | Semiconductor device |
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2015
- 2015-12-08 CN CN201510900285.9A patent/CN105429481B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN105429481A (en) | 2016-03-23 |
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