CN209881662U - Busbar device integrating direct-current busbar and alternating-current busbar - Google Patents
Busbar device integrating direct-current busbar and alternating-current busbar Download PDFInfo
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- CN209881662U CN209881662U CN201920907763.2U CN201920907763U CN209881662U CN 209881662 U CN209881662 U CN 209881662U CN 201920907763 U CN201920907763 U CN 201920907763U CN 209881662 U CN209881662 U CN 209881662U
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Abstract
The utility model discloses a bus bar device integrating a direct current bus bar and an alternating current bus bar, which comprises n direct current input bus bars, two alternating current output bus bars and an insulating plate, wherein n is an integer more than or equal to 2; at least two direct current input busbars with opposite polarities are arranged in the n direct current input busbars; one of the two alternating current output bus bars is an O1 pole, and the other is an O2 pole; the direct current input bus and the alternating current output bus are sequentially stacked, and an insulating plate is arranged between any two buses; the direct current input busbar and the alternating current output busbar both comprise two insulating plastic films and a polar plate positioned between the two insulating plastic films. The utility model has compact structure, lower inductance and impedance, flow equalization, good heat dissipation effect, small interference to other components and parts, and reliable and stable operation of the power unit; the structure is clear and clear, the installation is simple and convenient, and the application prospect is good.
Description
Technical Field
The utility model belongs to the technical field of power electronics, concretely relates to female device of arranging and exchanging female row of integrated direct current.
Background
The busbar is the most commonly used electrical connecting piece for a main circuit in the current converter equipment, and is mainly divided into a direct current busbar and an alternating current busbar, wherein the direct current busbar is an input busbar, the alternating current busbar is an output busbar, and the current direct current busbar and the alternating current busbar are two independent components. In recent years, with the rapid development of power electronic devices, the capacity of an IGBT (insulated gate bipolar transistor) module is increasingly large, the voltage level is increasingly high, the power density of a power unit of the IGBT module, which is used for power conversion, is gradually increased, and the independent dc bus and ac bus have large volumes and are increasingly difficult to meet the demand, so that the development of a bus device capable of integrating the dc bus and the ac bus has a practical significance.
CN 204168155U discloses a laminated busbar, which effectively integrates a dc busbar and an ac busbar on one laminated busbar, but all the ac output busbars are located on the same side of the same dc input busbar, i.e. the ac output busbars are unipolar O1 or unipolar O2, and only unipolar output can be achieved. In addition, the inductance value of the busbar in the prior art is high, and interference is easily generated on the IGBT module.
Therefore, it is very significant to develop a bus device that can output integrated dc bus and ac bus with low inductance and different polarities.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art volume great, the integrated nature is poor, inductance value is high and only can realize the defect of monopole output, provide a small, integrated level is high, inductance value is low and can export the female device of arranging and exchanging female arranging of integrated direct current of different polarity.
In order to achieve the above object, the utility model provides a following technical scheme:
a bus bar device integrating a direct current bus bar and an alternating current bus bar comprises n direct current input bus bars, two alternating current output bus bars and an insulating plate, wherein n is an integer greater than or equal to 2;
at least two direct current input busbars with opposite polarities are arranged in the n direct current input busbars;
one of the two alternating current output bus bars is an O1 pole, and the other is an O2 pole;
the direct current input busbar and the alternating current output busbar are sequentially stacked, and an insulating plate is arranged between any two busbars;
the direct current input busbar and the alternating current output busbar both comprise two insulating plastic films and a polar plate positioned between the two insulating plastic films.
The utility model discloses an adopt insulating plastic film to wrap up the polar plate, showing the insulating properties who promotes the polar plate (the female row of arranging of direct current input and alternating current output mother row), in addition, the utility model discloses a female row of alternating current output is the O1 utmost point, and another is the O2 utmost point, has overcome the defect that prior art's integrated mother row only can realize monopole alternating current output, the utility model discloses structural design is simple, and the insulating between each mother row is effectual, can realize bipolar alternating current output. The utility model discloses it is integrated effectual, need not respectively to female the arranging of direct current and the female row of interchange installs, also reduced female influence of arranging stress to electronic components.
According to the busbar device integrating the direct-current busbar and the alternating-current busbar, the insulating plate has the insulation withstand voltage of more than 20kV, the flame retardant rating of 94-V0 and the thickness of 2-5 mm; the voltage difference between the O1 pole and the O2 pole can reach 2000V at most. The utility model discloses a protection scope is not limited to this, and the insulation board of suitable material and thickness can be selected according to the actual demand to the technical staff in the field, and the thickness of insulation board is too thick, and the processing degree of difficulty is great, and the thickness of insulation board is too thin, and the insulating properties between each female row is not good promptly.
The busbar device integrated with the direct-current busbar and the alternating-current busbar is of a hot-press forming structure.
According to the busbar device integrating the direct-current busbar and the alternating-current busbar, hole positions corresponding to the through holes in the polar plate are arranged on the insulating plastic film.
According to the busbar device integrating the direct-current busbar and the alternating-current busbar, the polar plates are fixedly connected with the insulating plastic film through the bolts, the insulating cushion blocks are sleeved outside the bolts to improve the insulating property, the direct-current input busbar or the alternating-current output busbar and an IGBT contact surface are a plane so as to be convenient to install and ensure uniform stress, and power taking points (direct-current power taking points and alternating-current power taking points) and the like are reserved for each polar plate assembly.
In the busbar device integrated with the dc busbar and the ac busbar, n is 2. The protection scope of the present invention is not limited thereto, and the present invention is only exemplified by this.
According to the busbar device integrating the direct-current busbar and the alternating-current busbar, the direct-current input busbar and the alternating-current output busbar have the same structure, the insulating plastic film and the polar plate are of L-shaped structures, and the insulating plastic film, the polar plate and the insulating plastic film are sequentially stacked to form the L-shaped direct-current input busbar or the alternating-current output busbar. The specific shape of the polar plate of the utility model is not limited to this, and the utility model only provides a feasible technical proposal.
The busbar device integrated with the direct-current busbar and the alternating-current busbar mainly comprises the direct-current input busbar I, the direct-current input busbar II, the alternating-current output busbar I and the alternating-current output busbar II which are sequentially connected, the direct-current input busbar I and the direct-current input busbar II form a T-shaped structure I, the alternating-current output busbar I and the alternating-current output busbar II form a T-shaped structure II, T-shaped rod-shaped parts of the T-shaped structures I and the T-shaped rod-shaped parts of the T-shaped structures II are connected to form an I-shaped structure, and the rod-shaped parts of the T-shaped structures I and the T-shaped rod-shaped parts of the T-shaped structures. The specific structure of the bus bar device of the present invention is not limited thereto, and only one feasible technical solution is provided here.
According to the busbar device integrated with the direct-current busbar and the alternating-current busbar, the insulating plastic film is a PET (polyethylene terephthalate) film, an LDPE (low-density polyethylene) film, a PA (polyamide) film, a PE (polyethylene) film, a NOMEX (non-oriented polyethylene) film, a PI (polyimide) film, a PVF (polyvinyl fluoride) film, FR-4 or FORMEX (polyvinyl chloride) film, and the thickness of the insulating plastic film is 0.2-1 mm. The material of the film of the present invention is not limited thereto, and the present invention is only exemplified. The film is too thick, the processing difficulty is larger, and the film is too thin, namely the insulating property is not good.
According to the bus bar device integrating the direct-current bus bar and the alternating-current bus bar, the inductance value of the bus bar device is less than or equal to 9.16nH, and the impedance is less than or equal to 0.06m omega. The utility model discloses a female integration of arranging and exchanging female row with the direct current, can realize bipolar alternating current output simultaneously, compare with the female row of arranging and exchanging the female prior art who arranges of needs installation a plurality of direct currents, show to have reduced inductance value, reduce and disturb other devices.
Has the advantages that:
(1) the utility model discloses a female device of female arranging of integrated direct current mother row and alternating current mother row, compact structure, inductance and impedance are lower, flow equalize, and the radiating effect is good, and is little to the interference of other components and parts, can guarantee that power unit work operation is reliable, stable;
(2) the utility model discloses a female device that arranges and exchange female arranging of integrated direct current, the structure is clear, and the installation is simple and convenient, has also reduced female influence of arranging stress to electronic components simultaneously, has application prospect.
Drawings
Fig. 1, 2 and 3 are a schematic perspective view, a top view and a left side view of a busbar device integrated with a dc busbar and an ac busbar according to the present invention;
fig. 4 and 5 are exploded views of a bus bar device integrating a dc bus bar and an ac bus bar according to the present invention;
fig. 6 is a schematic view of the busbar device of the present invention installed in the power conversion unit;
fig. 7 and 8 are a schematic diagram and an exploded view of a dc input bus bar I according to the present invention, respectively;
fig. 9 and 10 are a schematic diagram and an exploded view of a dc input bus bar II according to the present invention, respectively;
fig. 11 and 12 are a schematic diagram and an exploded view of an ac output busbar I according to the present invention, respectively;
fig. 13 and 14 are a schematic diagram and an exploded view of an ac output bus bar II according to the present invention, respectively;
the insulation structure comprises a 1-direct current input busbar I, a 2-direct current input busbar II, a 3-alternating current output busbar I, a 4-alternating current output busbar II, 5-insulation boards I, 6-insulation boards II, 7-insulation boards III, 8-insulation plastic films, 9-pole plates, 10-insulation cushion blocks I, 11-copper pole columns I, 12-PEM nails, 13-insulation cushion blocks II, 14-copper pole columns II, 15-insulation cushion blocks III, 16-copper nuts and 17-copper pole columns III.
Detailed Description
The following describes the present invention with reference to the accompanying drawings.
Example 1
A busbar device integrating a direct current busbar and an alternating current busbar is shown in figures 1-5 and comprises a direct current input busbar I1, an insulating plate I5, a direct current input busbar II 2, an insulating plate II 6, an alternating current output busbar I3, an insulating plate III 7 and an alternating current output busbar II 4 which are sequentially stacked, wherein the polarity of the direct current input busbar I1 is opposite to that of the direct current input busbar II 2, the alternating current output busbar I3 is an O1 pole, the alternating current output busbar II 4 is an O2 pole, and the voltage difference between the O1 pole and the O2 pole can reach 2000V at most;
the insulation plates I5, II 6 and III 7 are all insulation plates with the thickness of 2-5 mm and the insulation withstand voltage of more than 20 kV;
the structures of the direct current input busbar and the alternating current output busbar are the same, the schematic diagrams and the explosion views of the direct current input busbar I1, the direct current output busbar II 2 and the alternating current output busbar I3, the alternating current output busbar I4 are shown in figures 7-14, the schematic diagrams and the explosion views respectively comprise two insulating plastic films 8 and a polar plate 9 positioned between the two insulating plastic films, the insulating plastic films and the polar plate are all in L-shaped structures, the insulating plastic films, the polar plate and the insulating plastic films are sequentially laminated to form the L-shaped direct current input busbar or the alternating current output busbar, the insulating plastic film 8 is a PET film, an LDPE film, a PA film, a PE film, an NOMEX film, a PI film, a PVF film, FR-4 or FORMEX film with the thickness of 0.2-1 mm, hole sites (copper pole I11, copper pole II 14 and copper pole III 17) corresponding to the through holes on the polar plate 9 are arranged on the insulating plastic film 8, the polar plate 9 and the insulating plastic film 8 are, the bolt is sleeved with an insulating cushion block (an insulating cushion block I10, an insulating cushion block II 13 and an insulating cushion block III 15), and the contact surface of the direct current input busbar or the alternating current output busbar and the IGBT is a plane;
the direct current input busbar I1 and the direct current input busbar II 2 form a T-shaped structure I, the alternating current output busbar I3 and the alternating current output busbar II 4 form a T-shaped structure II, T-shaped rod-shaped parts of the T-shaped structure I and the T-shaped rod-shaped part of the T-shaped structure II are connected to form an I-shaped structure finally, the T-shaped structure I and the T-shaped rod-shaped part of the T-shaped structure II are opposite to each other, and the whole busbar device, namely insulation plastic films of the four busbars and insulation plates among the busbars are formed through hot pressing.
Will the utility model discloses a female device of arranging installs on the power conversion unit promptly be connected the back with IGBT module segment through female fixed orifices and the insulating block on arranging and install the water-cooling board, link to each other the female section of arranging I and the female II of arranging of direct current input with direct current capacitance, its schematic diagram is shown in figure 6, can realize the discharge process of the contravariant of direct current to alternating current and exchange the charging process to direct current through this female device of arranging.
The rated voltage of DC2200V and the rated current of 990A are used as input, the discharge process of the busbar device is simulated, and the inductance value of the busbar device is 9.16nH and the impedance is 0.06m omega.
Setting 55 ℃ as an environment temperature, inputting current 110A to the IGBT corresponding to the six lap joint points respectively, and outputting current 660A to the bending terminal, and performing simulation on the busbar device to obtain that the maximum temperature rise of the direct-current input busbar I is only 3.145K, and the maximum temperature rise of the direct-current input busbar II is only 3.84K. The temperature rise of the direct current input busbar in the prior art is 25-50K under the same condition, and the comparison shows that the radiating effect of the busbar is good.
Setting 55 ℃ as an ambient temperature, inputting current 181.5A to the IGBT corresponding to the six lap joints respectively, and outputting current 1089A to the bending terminal, and performing simulation on the busbar device to obtain that the highest temperature rise of the alternating current output busbar I is only 7.6K, and the highest temperature rise of the alternating current output busbar II is only 12.15K. The temperature rise of the alternating current output busbar in the prior art is 30-50K under the same condition, and the comparison shows that the radiating effect of the busbar is good.
Through verification, the utility model has the advantages of compact structure, lower inductance and impedance, uniform flow, good heat dissipation effect, small interference to other components and parts, and capability of ensuring reliable and stable operation of the power unit; the structure is clear, the installation is simple and convenient, and meanwhile, the influence of the busbar stress on electronic components is reduced, so that the structure has a good application prospect.
Example 2
The structure of the busbar device integrated with the direct current busbar and the alternating current busbar is basically the same as that of the busbar device in the embodiment 1, and the difference is that the busbar device is provided with four direct current input busbars, namely an insulating plate IV, a direct current input busbar III, an insulating plate V and a direct current input busbar IV are sequentially stacked in the direction of the direct current input busbar I away from the alternating current busbar. The polarity of the direct current input bus bar III is opposite to that of the direct current input bus bar IV.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these embodiments are merely illustrative and various changes or modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A bus bar device integrating a direct current bus bar and an alternating current bus bar is characterized by comprising n direct current input bus bars, two alternating current output bus bars and an insulating plate, wherein n is an integer greater than or equal to 2;
at least two direct current input busbars with opposite polarities are arranged in the n direct current input busbars;
one of the two alternating current output bus bars is an O1 pole, and the other is an O2 pole;
the direct current input busbar and the alternating current output busbar are sequentially stacked, and an insulating plate is arranged between any two busbars;
the direct current input busbar and the alternating current output busbar both comprise two insulating plastic films and a polar plate positioned between the two insulating plastic films.
2. The busbar device integrating the direct-current busbar and the alternating-current busbar according to claim 1, wherein the insulating plate has an insulation withstand voltage of more than 20kV and a thickness of 2-5 mm;
the voltage difference between the O1 pole and the O2 pole can reach 2000V at most.
3. The busbar device according to claim 1, wherein the busbar device is a hot press molding structure.
4. The busbar device according to claim 1, wherein the insulating plastic film is provided with holes corresponding to the through holes of the plates.
5. The busbar device according to claim 4, wherein the pole plate is fixedly connected with the insulating plastic film through a bolt, an insulating cushion block is sleeved outside the bolt, and the contact surface of the direct current input busbar or the alternating current output busbar and the IGBT is a plane.
6. The busbar device according to claim 1, wherein n is 2.
7. The busbar device according to claim 6, wherein the DC input busbar and the AC output busbar have the same structure, the insulating plastic film and the pole plate are L-shaped, and the insulating plastic film, the pole plate and the insulating plastic film are sequentially laminated to form the L-shaped DC input busbar or the L-shaped AC output busbar.
8. The busbar device according to claim 7, wherein the busbar device mainly comprises a DC input busbar I, a DC input busbar II, an AC output busbar I and an AC output busbar II which are connected in sequence, the DC input busbar I and the DC input busbar II form a T-shaped structure I, the AC output busbar I and the AC output busbar II form a T-shaped structure II, the T-shaped structure I and the T-shaped rod-shaped part of the T-shaped structure II are connected to form an I-shaped structure, and the rod-shaped parts of the T-shaped structure I and the T-shaped structure II are opposite to each other.
9. The busbar device according to claim 1, wherein the insulating plastic film is a PET film, LDPE film, PA film, PE film, NOMEX film, PI film, PVF film, FR-4 film or FORMEX film, and has a thickness of 0.2-1 mm.
10. The busbar device according to claim 1, wherein the busbar device has an inductance value of 9.16nH or less and an impedance of 0.06mΩ or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920907763.2U CN209881662U (en) | 2019-06-17 | 2019-06-17 | Busbar device integrating direct-current busbar and alternating-current busbar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920907763.2U CN209881662U (en) | 2019-06-17 | 2019-06-17 | Busbar device integrating direct-current busbar and alternating-current busbar |
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| Publication Number | Publication Date |
|---|---|
| CN209881662U true CN209881662U (en) | 2019-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920907763.2U Active CN209881662U (en) | 2019-06-17 | 2019-06-17 | Busbar device integrating direct-current busbar and alternating-current busbar |
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| CN (1) | CN209881662U (en) |
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- 2019-06-17 CN CN201920907763.2U patent/CN209881662U/en active Active
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