CN203326899U - DC bus mounting structure used for inverter - Google Patents

DC bus mounting structure used for inverter Download PDF

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Publication number
CN203326899U
CN203326899U CN2013203407504U CN201320340750U CN203326899U CN 203326899 U CN203326899 U CN 203326899U CN 2013203407504 U CN2013203407504 U CN 2013203407504U CN 201320340750 U CN201320340750 U CN 201320340750U CN 203326899 U CN203326899 U CN 203326899U
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China
Prior art keywords
busbar
bus
electrode
bus capacitor
inverter
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Application number
CN2013203407504U
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Chinese (zh)
Inventor
王健
张立
王剑国
王峰
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Changshu Switchgear Manufacturing Co Ltd
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Changshu Switchgear Manufacturing Co Ltd
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Priority to CN2013203407504U priority Critical patent/CN203326899U/en
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Abstract

The utility model provides a DC bus mounting structure used for an inverter and belongs to the technical field of power electronics. The DC bus mounting structure used for the inverter includes a bus capacitor, a copper nut, a first busbar, an insulation layer and a second busbar. The first busbar and the second busbar are disposed right above the bus capacitor. The insulation layer is disposed between the first busbar and the second busbar. The bus capacitor is provided with a first electrode and a second electrode. The first electrode of the bus capacitor is connected with a lower end of the copper nut electrically. The second electrode of the bus capacitor is connected with the first busbar electrically. The upper end of the copper nut is connected with the second busbar electrically after penetrating through the first busbar and the insulation layer successively. The DC bus mounting structure used for the inverter has advantages that uncertainties such as stress, poor contact and the like can be reduced effectively after the bus copper bars are installed; problems of uneven current, local overheating and the like can be avoided; bus stray inductance can be reduced effectively; manufacturing difficulties can be reduced and reliability in links such as manufacture, transportation, storage, installation and the like can be enhanced; and the DC bus mounting structure used for the inverter is low in cost, simple and convenient for maintaining and repairing and easy to recycle and use and is environment friendly.

Description

A kind of DC bus mounting structure of inverter
Technical field
The utility model belongs to electric and electronic technical field, is specifically related to a kind of DC bus mounting structure of inverter.
Background technology
Along with the call of environmental protection, energy-saving and emission-reduction, photovoltaic power generation technology is more and more universal, and the inverter busbar also presents diversified development.Nowadays the inverter DC bus-bar voltage generally can be up to DC 1000V, dielectric voltage withstand between positive and negative busbar is required very high, generally adopts in the industry the methods such as epoxy plate, insulating paper to realize the electrical isolation of positive and negative busbar, is the manufacture method of traditional bus.Also have and adopt the laminated bus mode of insulating material and busbar integrated casting to make.
But the space obstacle of the insulating material of traditional busbar scheme, can cause positive and negative busbar to have certain altitude poor, need a wherein busbar to have certain space deformation to complete Matching installation with the installation end pin that bus capacitor mates.In the process that this type of busbar is easily preserved in punch process and transportation, there is punching precision, the influencing factors such as heap pressure, collision, cause the bus pin whole problem that is uneven, and then cause the problem that has stress and loose contact between bus capacitor and busbar after installing, easily cause the problems such as current unevenness, local overheating.Also easily cause the busbar stacked arrangement not near, crooked pin, also further strengthened the bus stray inductance simultaneously, increased inversion module and opened the peak voltage of shutoff, module is caused to harmful effect, also can cause Absorption Capacitance, bus capacitor, busbar etc. to strengthen the problem of heating.
Another kind of busbar is the laminated bus that adopts integrated casting, though this type of bus can overcome above-mentioned shortcoming, has price high, the process technology threshold is high, be not easy to the shortcomings such as maintenance and repair, integrated casting has also increased the recycling difficulty of material, is unfavorable for environmental protection.
In view of above-mentioned prior art, be necessary the DC bus mounting structure of existing inverter is improved, technical scheme described below produces under such background.
Summary of the invention
The purpose of this utility model is that a kind of DC bus mounting structure that processing and manufacturing, convenient transportation preservation and installation and maintenance, stray inductance are low, be difficult for producing stress and inverter with low cost after installing of being convenient to will be provided.
The purpose of this utility model reaches like this, a kind of DC bus mounting structure of inverter, be characterized in: comprise bus capacitor, copper screw cap, the first busbar, insulating barrier and the second busbar, described the first busbar, the second busbar be positioned at bus capacitor directly over, described insulating barrier is between the first busbar and the second busbar, described bus capacitor has the first electrode and the second electrode, wherein: the first electrode of bus capacitor is electrically connected to the lower end of described copper screw cap, the second electrode of bus capacitor is electrically connected to described the first busbar, the upper end of described copper screw cap is being passed the first busbar successively, after insulating barrier, with described the second busbar, be electrically connected to.
In a specific embodiment of the present utility model, offer the first installing hole on described the first busbar, the position of described the first installing hole is corresponding with the position of the second electrode of described bus capacitor, and described the first busbar is being fixed through being electrically connected to the second electrode of described bus capacitor after the first installing hole by securing member.
In another specific embodiment of the present utility model, the lower end of described copper screw cap is electrically connected to fixing with the first electrode of described bus capacitor by securing member.
In another specific embodiment of the present utility model, also offer the first through hole on described the first busbar, offer the second through hole on described insulating barrier, offer the second installing hole on described the second busbar, described the first through hole, the position of the second through hole and the second installing hole is corresponding with the position of the first electrode of described bus capacitor, the upper end of described copper screw cap is being passed the first through hole of the first busbar successively, after the second through hole of insulating barrier, realized at the second installing hole through on the second busbar that by securing member being electrically connected between the upper end of the second busbar and copper screw cap fix.
The utility model is due to after adopting said structure, upper end the second busbar is to install with the first electrode of bus capacitor by padded realization of copper screw cap, do not need to resemble prior art and carry out special flexural deformation processing for the installation pin that is formed with the certain space drop, only need the installing hole on the busbar plane can realize installing, thereby can effectively reduce the unreliable factor after bus bar copper row is installed: as problems such as stress and loose contacts, avoid the generation of the problems such as current unevenness, local overheating, also effectively reduce the bus stray inductance; In addition, can reduce the busbar manufacture difficulty, increase and manufacture, transport the reliability in the links such as preservation, installation.Simultaneously, than the laminated bus design of integrated casting in prior art, the utlity model has with low costly, difficulty of processing is low, and maintenance and repair are easy, recycles simply, and trail development speed is fast, more the advantage such as environmental protection.
The accompanying drawing explanation
Fig. 1 is an embodiment stereochemical structure explosive view of the present utility model.
The planar side view that Fig. 2 is Fig. 1 structure.
Fig. 3 is the planar side view of the utility model after installation.
In figure: 1. bus capacitor, 11. first electrodes, 12. second electrodes; 2. copper screw cap; 3. the first busbar, 31. first through holes, 32. first installing holes; 4. insulating barrier, 41. second through holes; 5. the second busbar, 51. second installing holes.
Embodiment
Refer to Fig. 1, Fig. 2 and Fig. 3, a kind of DC bus mounting structure of inverter, the utility model be take the first busbar 3 as negative busbar, the second busbar 5 is example for positive busbar, bus capacitor 1 be take the first electrode 11 as anodal, the second electrode 12 is example for negative pole, comprise bus capacitor 1, copper screw cap 2, the first busbar 3 as negative busbar, the second busbar 5 of insulating barrier 4 and the positive busbar of conduct, described the first busbar 3 be positioned at bus capacitor 1 directly over, described the second busbar 5 is stacked in the top of the first busbar 3, described insulating barrier 4 is between the first busbar 3 and the second busbar 5, described bus capacitor 1 has as the first anodal electrode 11 with as the second electrode 12 of negative pole, wherein: the first electrode 11 of bus capacitor 1 is electrically connected to the lower end of described copper screw cap 2, the second electrode 12 of bus capacitor 1 is electrically connected to described the first busbar 3, the upper end of described copper screw cap 2 is being passed the first busbar 3 successively, after insulating barrier 4, with described the second busbar 5, be electrically connected to.Specifically: on described the first busbar 3, offer the first installing hole 32, the position of described the first installing hole 32 is corresponding with the position of the second electrode 12 of described bus capacitor 1, and described the first busbar 3 is being fixed through rear the electrical connection with the second electrode 12 of described bus capacitor 1 of the first installing hole 32 by securing member.The lower end of described copper screw cap 2 is electrically connected to fixing with the first electrode 11 of described bus capacitor 1 by securing member.Also offer the first through hole 31 on described the first busbar 3, offer the second through hole 41 on described insulating barrier 4, offer the second installing hole 51 on described the second busbar 5, described the first through hole 31, the position of the second through hole 41 and the second installing hole 51 is corresponding with the position of the first electrode 11 of described bus capacitor 1, the upper end of described copper screw cap 2 is being passed the first through hole 31 of the first busbar 3 successively, after the second through hole 41 of insulating barrier 4, realized at the second installing hole 51 through on the second busbar 5 that by securing member being electrically connected between the upper end of the second busbar 5 and copper screw cap 2 fix, the first through hole 31 of offering on other the first busbar 3 requires enough large, electric insulation while guaranteeing copper screw cap 2 through the first through hole 31 between copper screw cap 2 and the first busbar 3.
The utility model utilizes an installation end of the padded bus capacitor 1 of copper screw cap 2, and this highly is about the positive busbar of the first busbar 3() with the height sum of insulating barrier 4.Make the second busbar 5(bear busbar) and bus capacitor 1 is when mounted, the installation end of the second busbar 5 does not need to produce any deformation, only needs bus capacitor 1, copper screw cap 2 and the second busbar 5 to be fixed and got final product as screw by the second installing hole 51 use securing members on the second busbar 5 planes.Because stress is very little, contact goodly after installation, avoid the problems such as generation current inequality, local overheating.Busbar global design simultaneously, without crooked pin, is arranged compactness between positive and negative busbar after installing, and as shown in Figure 3, thereby makes the integral bus bar stray inductance lower, is conducive to the work of inversion module.
What more than enumerate is only the specific embodiment of this patent, and obviously this patent is not limited to above embodiment, and many similar variations are arranged thereupon, the positive and negative variation such as: polarity, uses nonpolarity thin-film capacitor etc.Anyly according to the utility model design, change in the form rather than substance all and should be considered as protection range of the present utility model.

Claims (4)

1. a kind of DC bus mounting structure of inverter, it is characterized in that: comprise bus capacitor (1), copper screw cap (2), the first busbar (3), insulating barrier (4) and the second busbar (5), described the first busbar (3), the second busbar (5) be positioned at bus capacitor (1) directly over, described insulating barrier (4) is positioned between the first busbar (3) and the second busbar (5), described bus capacitor (1) has the first electrode (11) and the second electrode (12), wherein: first electrode (11) of bus capacitor (1) is electrically connected to the lower end of described copper screw cap (2), second electrode (12) of bus capacitor (1) is electrically connected to described the first busbar (3), the upper end of described copper screw cap (2) is being passed the first busbar (3) successively, after insulating barrier (4), with described the second busbar (5), be electrically connected to.
2. The DC bus mounting structure of a kind of inverter according to claim 1, it is characterized in that on described the first busbar (3) offering the first installing hole (32), the position of described the first installing hole (32) is corresponding with the position of second electrode (12) of described bus capacitor (1), and described the first busbar (3) is being fixed through being electrically connected to second electrode (12) of described bus capacitor (1) after the first installing hole (32) by securing member.
3. The DC bus mounting structure of a kind of inverter according to claim 1, is characterized in that the lower end of described copper screw cap (2) is electrically connected to fixing with first electrode (11) of described bus capacitor (1) by securing member.
4. the DC bus mounting structure of a kind of inverter according to claim 1, it is characterized in that on described the first busbar (3) also offering the first through hole (31), offer the second through hole (41) on described insulating barrier (4), offer the second installing hole (51) on described the second busbar (5), described the first through hole (31), the position of the second through hole (41) and the second installing hole (51) is corresponding with the position of first electrode (11) of described bus capacitor (1), the upper end of described copper screw cap (2) is being passed first through hole (31) of the first busbar (3) successively, after second through hole (41) of insulating barrier (4), realized at the second installing hole (51) through on the second busbar (5) that by securing member being electrically connected between the upper end of the second busbar (5) and copper screw cap (2) fix.
CN2013203407504U 2013-06-14 2013-06-14 DC bus mounting structure used for inverter Active CN203326899U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013203407504U CN203326899U (en) 2013-06-14 2013-06-14 DC bus mounting structure used for inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013203407504U CN203326899U (en) 2013-06-14 2013-06-14 DC bus mounting structure used for inverter

Publications (1)

Publication Number Publication Date
CN203326899U true CN203326899U (en) 2013-12-04

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CN2013203407504U Active CN203326899U (en) 2013-06-14 2013-06-14 DC bus mounting structure used for inverter

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109346323A (en) * 2018-09-29 2019-02-15 蔚来汽车有限公司 Electronic component, frequency converter and inverter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109346323A (en) * 2018-09-29 2019-02-15 蔚来汽车有限公司 Electronic component, frequency converter and inverter

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