CN118216079A - Bus positioning structure and electrical equipment - Google Patents
Bus positioning structure and electrical equipment Download PDFInfo
- Publication number
- CN118216079A CN118216079A CN202280074269.7A CN202280074269A CN118216079A CN 118216079 A CN118216079 A CN 118216079A CN 202280074269 A CN202280074269 A CN 202280074269A CN 118216079 A CN118216079 A CN 118216079A
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- China
- Prior art keywords
- bus bar
- terminal
- fastening hole
- fastening
- hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003780 insertion Methods 0.000 claims abstract description 34
- 230000037431 insertion Effects 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 230000000694 effects Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000000034 method Methods 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
- H02M7/42—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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The bus bar positioning structure (1) has: a pair of terminal blocks (3, 4) each provided with a bus bar (P, N) that connects two electrical components (for example, a DC capacitor (C) and a power module (11)) of the inverter device (2); and positioning pins (5, 6) which are vertically provided on one of the terminal blocks (3, 4) and which position the arrangement of the bus bars (P, N). Insertion holes (P1, N1) into which the positioning pins (5, 6) are inserted are formed in the bus bar (P, N). The insertion holes (P1, N1) are arranged at any positions in the regions (a 1, a 2) on one end side of the bus bar (P, N) farther than the distance from the second fastening holes (P3, N3) to the first fastening holes (P2, N2) on the bus bar (P, N).
Description
Technical Field
The present invention relates to a positioning structure of a bus bar applied to an electric device such as an inverter device.
Background
In the inverter device, a dc capacitor and a switching element are often connected by a bus bar having low inductance and low impedance. Examples of the bus bar include a bus bar for suppressing a surge applied to a rotary machine driving device of patent document 1. According to this bus bar, overvoltage breakdown due to a decrease in surge voltage during switching operation of the switching element can be suppressed, and power loss due to a decrease in impedance of the bus bar can be reduced, and effects of space saving and low cost can be obtained.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication 2016-140210
Disclosure of Invention
Since the conventional bus bar does not include a positioning pin, it takes a lot of time and effort to perform screw tightening with high positional accuracy. Therefore, if the positioning pins are provided on the bus bars, the creepage distance of the different bus bars for preventing discharge can be ensured promptly and accurately.
However, in order to fix the positioning pin to the bus bar, it is necessary to secure a through hole for the positioning pin in the bus bar.
If the through hole is formed in the bus bar, the inductance and impedance of the bus bar increase, and there is a possibility that the surge voltage during the switching operation of the switching element cannot be reduced, and further, the power loss of the bus bar cannot be reduced.
In view of the above, an object of the present invention is to improve the assemblability of a bus bar and reduce inductance and impedance.
Accordingly, one embodiment of the present invention is a bus bar positioning structure including: a pair of terminal blocks provided with bus bars for connecting two electrical components of an electrical device; and a positioning pin that is vertically provided on one of the terminal blocks and positions the arrangement of the bus bar, wherein an insertion hole is formed in the bus bar, the positioning pin is inserted into the insertion hole, and the bus bar is formed with: a first fastening hole through which a fastener for fastening the bus bar to one of the terminals of the electrical component is inserted; and a second fastening hole through which a fastener for fastening the bus bar to the terminal of the other electrical component is inserted, wherein the insertion hole is disposed at a position on one end side of the bus bar farther than a distance from the first fastening hole to the second fastening hole.
In the bus bar positioning structure according to one aspect of the present invention, the insertion hole has a smaller diameter than the first fastening hole and the second fastening hole.
In the bus bar positioning structure according to one aspect of the present invention, the positioning pin inserted into the insertion hole does not protrude from the insertion hole.
In the bus bar positioning structure according to one aspect of the present invention, the electric device is an inverter device, one of the electric components is a dc capacitor of the inverter device, and the other electric component is a power module of the inverter device.
One embodiment of the present invention is an electrical device having the above-described bus bar positioning structure.
According to the present invention, the assembly of the bus bar can be improved and the inductance and impedance can be reduced.
Drawings
Fig. 1 is a plan view of a bus bar positioning structure according to an embodiment of the present invention applied to an electrical device.
Fig. 2 is a plan view of the bus bar of fig. 1 with a wire harness connected thereto.
Fig. 3 is a longitudinal sectional view of the state of fig. 2.
Fig. 4 is a basic circuit diagram of a power module connected to the bus bar of fig. 1.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The bus bar positioning structure 1 according to an embodiment of the present invention shown in fig. 1 is applied to the terminal blocks 3 and 4 in the housing 10 of the inverter device 2 as an example of an electric device.
The bus bar positioning structure 1 has: a pair of terminal blocks 3 on which the bus bar P is arranged, a pair of terminal blocks 4 on which the bus bar N is arranged, and positioning pins 5, 6 for positioning the arrangement of the bus bars P, N on the terminal blocks 3, 4.
(Bus P)
As shown in fig. 2, the bus bar P connects the connection terminal 71 of the harness 7 and the connection terminal C1 on the P-pole side of the dc capacitor C, which is one of the electrical components of the inverter device 2. The wire harness 7 is connected to a P-pole side terminal of a power module 11, which is one of the electrical components, and the power module 11 has a circuit including switching elements S1 to S6 shown in fig. 4.
The bus bar P is formed with: an insertion hole P1 into which a positioning pin 5 of one of the terminal blocks 3 described later is inserted, a first fastening hole P2 into which a fastener 9 for fastening the P-pole side terminal of the power module 11 and the bus bar P is inserted, and a second fastening hole P3 into which a fastener 9 for fastening the connection terminal C1 and the bus bar P is inserted.
The insertion hole P1 is disposed at an arbitrary position in a region a1 on one end side of the bus bar P, which is farther than a connection portion (second fastening hole P3) connected to the connection terminal C1 of the dc capacitor C and a connection portion (first fastening hole P2) connected to the connection terminal 71 of the harness 7, in the bus bar P in the figure. The diameter of the insertion hole P1 is set smaller than the diameters of the first fastening hole P2 and the second fastening hole P3. The insertion hole P1 may be a through hole as long as the inserted positioning pin 5 does not protrude.
(Bus N)
The bus bar N connects the connection terminal 81 of the harness 8 connected to the N-pole side terminal of the power module 11 and the N-pole side connection terminal C2 of the dc capacitor C.
The bus bar N is formed with: an insertion hole N1 into which a positioning pin 6 of one of the terminal blocks 4 described later is inserted, a first fastening hole N2 into which a fastener 9 for fastening the connection terminal 81 and the N-pole side terminal of the power module 11 to the bus bar N is inserted, and a second fastening hole N3 into which a fastener 9 for fastening the connection terminal C2 to the bus bar N is inserted.
The insertion hole N1 is disposed at an arbitrary position in a region a2 on one end side of the bus bar N, which is farther than a connection portion (second fastening hole N3) connected to the connection terminal C2 of the dc capacitor C and a connection portion (first fastening hole N2) connected to the connection terminal 81 of the harness 8, in the bus bar N in the figure. The diameter of the insertion hole N1 is set smaller than the diameters of the first fastening hole N2 and the second fastening hole N3. The insertion hole N1 may be a through hole as long as the inserted positioning pin 6 does not protrude, as in the insertion hole P1.
(Terminal block 3)
One terminal block 3 shown in fig. 3 of the pair of terminal blocks 3 includes a terminal portion 31, and the terminal portion 31 is connected to a connection terminal 71 of the P-pole-side wire harness 7 and a P-pole-side terminal of the power module 11, which are introduced into the housing 10. The terminal portion 31 has a fastening hole 310 into which the fastener 9 inserted into the first fastening hole P2 of the busbar P is screwed.
The other terminal block 3 of the pair of terminal blocks 3 includes a terminal portion 32 connected to the connection terminal C1 of the dc capacitor C disposed in the housing 10. The terminal portion 32 is formed with a fastening hole 320 through which the fastener 9 for connecting the connection terminal C1 to the terminal portion 32 via the bus bar P is screwed.
(Terminal block 4)
One terminal block 4 of the pair of terminal blocks 4 is arranged in parallel with the one terminal block 3 and includes a terminal portion 41, and the terminal portion 41 is connected to a connection terminal 81 of the wire harness 8 on the N-pole side introduced into the housing 10 and the N-pole side terminal of the power module 11. The terminal portion 41 has a fastening hole 410 into which the fastener 9 inserted into the first fastening hole N2 of the bus bar N is screwed.
The other terminal block 4 of the pair of terminal blocks 4 is arranged in parallel with the other terminal block 3, and includes a terminal portion 42 connected to the connection terminal C2 of the dc capacitor C. The terminal portion 42 is formed with a fastening hole 420 through which the fastener 9 for connecting the connection terminal C2 to the terminal portion 42 via the bus bar N is screwed.
(Locating pins 5, 6)
The positioning pin 5 is provided upright on the one terminal block 3 at a position corresponding to the insertion hole P1 of the busbar P. The height of the positioning pin 5 and the thickness of the busbar P are set so that the positioning pin 5 does not protrude from the insertion hole P1 of the busbar P.
The positioning pin 6 is provided upright on the one terminal block 4 at a position corresponding to the insertion hole N1 of the busbar N. The height of the positioning pin 6 and the thickness of the bus bar N are set so that the positioning pin 6 does not protrude from the insertion hole N1 of the bus bar N.
(Order of assembling inverter device 2)
An example of the assembly procedure of the inverter device 2 will be described with reference to fig. 1 to 3.
First, the bus bar P is disposed on the pair of terminal blocks 3 in the housing 10. That is, as shown in fig. 1 and 3, the insertion hole P1 and the first fastening hole P2 of the busbar P meet the positioning pin 5 and the fastening hole 310 of one terminal block 3, respectively, and one end side of the busbar P is disposed at the terminal portion 31 of the one terminal block 3. At this time, the second fastening hole P3 of the busbar P meets the fastening hole 320 of the other terminal block 3, and the other end side of the busbar P is disposed at the terminal portion 32 of the terminal block 3.
Next, the bus bar N is disposed on the pair of terminal blocks 4 in the housing 10. That is, as shown in fig. 1, the insertion hole N1 and the first fastening hole N2 of the bus bar N meet the positioning pin 6 and the fastening hole 410 of one terminal block 4, respectively, and one end side of the bus bar N is disposed at the terminal portion 41 of the one terminal block 4. At this time, the second fastening hole N3 of the bus bar N meets the fastening hole 420 of the other terminal block 4, and the other end side of the bus bar P is disposed at the terminal portion 42 of the terminal block 4.
Next, the connection terminals 71, 81 of the harnesses 7, 8 introduced into the housing 10 are arranged at the terminal portions 31, 41 of the one terminal blocks 3, 4, respectively. The connection terminals C1 and C2 of the dc capacitor C are disposed at the terminal portions 32 and 42 of the other terminal blocks 3 and 4, respectively.
As shown in fig. 2 and 3, the fastener 9 inserted through the connection terminal 71 of the wire harness 7 and the first fastening hole P2 of the busbar P is screwed into the fastening hole 310 of the terminal portion 31 of the one terminal block 3. The fastener 9 inserted into the connection terminal C1 of the dc capacitor C and the second fastening hole P3 of the bus bar P is screwed into the fastening hole 320 of the terminal portion 32 of the other terminal block 3.
Similarly, the fastener 9 inserted through the connection terminal 81 of the harness 8 and the first fastening hole N2 of the bus bar N is screwed into the fastening hole 410 of the terminal portion 41 of the one terminal block 4. The fastener 9 inserted into the connection terminal C2 of the dc capacitor C and the second fastening hole N3 of the bus bar N is screwed into the fastening hole 420 of the terminal portion 42 of the other terminal block 4.
As described above, the fixed bus bar P, N is connected to the terminal blocks 3 and 4 in the housing 10 of fig. 2.
(Effects of the present embodiment)
In the bus bar P, N of the inverter device 2 shown in fig. 2, the path of the white arrow connecting the first fastening hole P2 and the second fastening hole P3 at the shortest distance and the path of the white arrow connecting the first fastening hole N2 and the second fastening hole N3 at the shortest distance correspond to the current path of the inverter device 2, and the current density is the highest. On the other hand, in the regions a1 and a2 on the one end side of the bus bar P, N, which is farther than the distance from the second fastening holes P3 and N3 to the first fastening holes P2 and N2, the current density becomes low.
According to the bus bar positioning structure 1, by forming the insertion holes P1, N1 into which the positioning pins 5, 6 of the terminal blocks 3, 4 are inserted at arbitrary positions of the regions a1, a2, an increase in inductance and impedance of the bus bar P, N can be reduced. In particular, by setting the diameters of the insertion holes P1 and N1 smaller than the diameters of the first fastening holes P2, N2 and the second fastening holes P3 and N3, the inductance and the impedance of the bus bar P, N can be further reduced.
As shown in fig. 3, the thickness of the bus bar P, N or the heights of the positioning pins 5 and 6 are adjusted so that the positioning pins 5 and 6 do not protrude from the insertion holes P1 and N1, and thus, the basic circuit and other electric components than the dc capacitor C can be arranged on the positioning pins 5 and 6, and therefore, it is not necessary to enlarge the bus bar more than necessary.
As described above, according to the bus bar positioning structure 1, the positioning pins 5 and 6 and the insertion holes P1 and N1 are set at positions that do not increase the inductance and impedance of the bus bar as much as possible, so that the assembly can be easily performed while securing the creepage distance for preventing the discharge of the bus bar P, N.
In particular, by providing the insertion holes P1 and N1 at a position closer to the end of the bus bar P, N than the line connecting the connecting screw terminal portion through holes in the shortest path, the assembling property of the bus bar P, N is improved. Further, an increase in inductance, impedance, loss, and heat generation of the bus bar P, N can be suppressed. The surge voltage of the switching element due to the low inductance of the bus bar P, N is reduced. Further, the power efficiency of the inverter device 2 is improved due to the low impedance of the bus bar P, N.
The bus bar positioning structure of the present invention can be applied to an electric device other than an inverter device using a bus bar. For example, in a general bus bar connecting the dc capacitor C and the electric components other than the switching element, the increase in inductance and impedance can be reduced by providing a hole into which the positioning pin is inserted, as in the bus bar P, N. Therefore, in a general bus bar, by providing a hole into which a positioning pin is inserted at a position closer to the bus bar end than the line of the shortest path of current, assembly of a creepage distance for preventing discharge is also facilitated, an increase in impedance can be reduced, and a loss reduction effect of electric power can be obtained.
Claims (5)
1. A busbar positioning structure, wherein the busbar positioning structure has:
A pair of terminal blocks provided with bus bars for connecting two electrical components of an electrical device; and
A positioning pin vertically provided on one of the terminal blocks for positioning the arrangement of the bus bars,
An insertion hole is formed in the bus bar, the insertion hole is used for inserting the positioning pin,
The bus bar is formed with: a first fastening hole through which a fastener for fastening the bus bar to one of the terminals of the electrical component is inserted; and a second fastening hole through which a fastener for fastening the bus bar to the terminal of the other electrical component is inserted,
The insertion hole is disposed at a position on one end side of the bus bar farther than a distance from the first fastening hole to the second fastening hole.
2. The bus bar positioning structure of claim 1, wherein,
The aperture of the insertion hole is smaller than the apertures of the first fastening hole and the second fastening hole.
3. The bus bar positioning structure according to claim 1 or 2, wherein,
The positioning pin inserted into the insertion hole does not protrude from the insertion hole.
4. The bus bar positioning structure according to any one of claims 1 to 3, wherein,
The electrical apparatus is an inverter device and,
One of the electrical components is a dc capacitor of the inverter device,
The other electrical component is a power module of the inverter device.
5. An electrical device, wherein the electrical device has the bus bar positioning structure of any one of claims 1 to 4.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021182944A JP7294386B2 (en) | 2021-11-10 | 2021-11-10 | Busbar positioning structure and electrical equipment |
| JP2021-182944 | 2021-11-10 | ||
| PCT/JP2022/031797 WO2023084863A1 (en) | 2021-11-10 | 2022-08-24 | Busbar positioning structure and electrical apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118216079A true CN118216079A (en) | 2024-06-18 |
Family
ID=86335592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280074269.7A Pending CN118216079A (en) | 2021-11-10 | 2022-08-24 | Bus positioning structure and electrical equipment |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7294386B2 (en) |
| CN (1) | CN118216079A (en) |
| WO (1) | WO2023084863A1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5365424A (en) * | 1991-07-10 | 1994-11-15 | Kenetech Windpower, Inc. | High power laminated bus assembly for an electrical switching converter |
| JP2015023664A (en) | 2013-07-18 | 2015-02-02 | 株式会社豊田自動織機 | Inverter device |
| JP2016100943A (en) * | 2014-11-19 | 2016-05-30 | 株式会社ケーヒン | Electric power conversion system |
| JP6960573B2 (en) * | 2016-12-22 | 2021-11-05 | パナソニックＩｐマネジメント株式会社 | Busbar unit and motor drive |
| JP6872911B2 (en) | 2017-01-20 | 2021-05-19 | 株式会社クボタ | Travel route generator |
-
2021
- 2021-11-10 JP JP2021182944A patent/JP7294386B2/en active Active
-
2022
- 2022-08-24 WO PCT/JP2022/031797 patent/WO2023084863A1/en unknown
- 2022-08-24 CN CN202280074269.7A patent/CN118216079A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP7294386B2 (en) | 2023-06-20 |
| WO2023084863A1 (en) | 2023-05-19 |
| JP2023070695A (en) | 2023-05-22 |
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| PB01 | Publication |