CN110838656B

CN110838656B - Busbar, frequency converter and centrifugal machine

Info

Publication number: CN110838656B
Application number: CN201911198348.5A
Authority: CN
Inventors: 叶剑成; 蔡琨; 曹单; 陈土金
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Shanghai Meikong Smartt Building Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Shanghai Meikong Smartt Building Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2022-02-11
Anticipated expiration: 2039-11-29
Also published as: CN110838656A

Abstract

The invention provides a busbar, a frequency converter and a centrifuge. The busbar includes: a first sub-row; the end face of the second sub-row is connected with the end face of the first sub-row; the adjusting assembly is arranged on the first sub-row and connected with the second sub-row; and/or arranged on the second sub-row and connected with the first sub-row; the first sub-row is far away from the first mounting surface of the second sub-row and/or the second sub-row is far away from the second mounting surface of the first sub-row and is a plane. The bus bar provided by the invention is provided with the adjusting assembly, so that the mounting surfaces, which are used for penetrating screws and face the same direction, of the bus bar are flush, the bus bar can be assembled by using screws with the same specification, the risk of capacitor damage or the possibility of instable bus bar mounting can be effectively reduced, the reliability and stability of bus bar mounting are improved, the assembly reject ratio is reduced, and the production efficiency is improved.

Description

Busbar, frequency converter and centrifugal machine

Technical Field

The invention relates to the field of household electrical equipment, in particular to a busbar, a frequency converter comprising the busbar and a centrifuge comprising the frequency converter.

Background

At present, a plurality of capacitors are generally arranged in a capacitor assembly of a frequency converter in series-parallel connection, the existing common method is to punch a boss on a busbar or add a hem on the busbar, but if the boss is punched, the copper bar needs to be stretched due to the punching of the boss, the thickness of the boss is difficult to ensure, and a special die is needed; if the flanging mode is adopted, the flanging can be folded after blanking, the current uniformity is influenced, the processing technology is complex if numerical control bending is adopted, and a special die is needed for die bending. In addition, the two methods can cause that the mounting surfaces of the screws are not on the same plane, bolts with different lengths are needed when the capacitor is mounted, the capacitor is easy to be incorrectly mounted in production and operation, and the capacitor can be damaged or not fixed tightly.

Disclosure of Invention

In order to improve at least one of the above technical problems, an object of the present invention is to provide a busbar.

Another object of the present invention is to provide a frequency converter including the bus bar.

It is a further object of the present invention to provide a centrifuge comprising the above frequency converter.

In order to achieve the above object, a first aspect of the present invention provides a busbar, including: a first sub-row; the end face of the second sub-row is connected with the end face of the first sub-row; the adjusting assembly is arranged on the first sub-row and connected with the second sub-row; and/or the second sub-row is arranged on the second sub-row and is connected with the first sub-row; the first sub-row is far away from the first mounting surface of the second sub-row and/or the second sub-row is far away from the second mounting surface of the first sub-row and is a plane.

This scheme provides a female arranging, including two sub-rows, two sub-rows are arranged side by side and the relative setting of terminal surface of two sub-rows, are provided with the adjustment subassembly on at least one of them sub-row, and the adjustment subassembly links to each other with another sub-row. For example, the first sub-row is provided with an adjusting assembly, the adjusting assembly is connected with the second sub-row, and one end of the adjusting assembly, which is far away from the first sub-row, is flush with the end face, which is far away from the first sub-row, of the second sub-row to form a second mounting surface; thus, the distance from the end face of the first sub-row far away from the second sub-row to the second mounting surface is equal along the thickness direction of the busbar. Of course, it can be understood that the second sub-row may also be provided with an adjusting assembly, or the first sub-row and the second sub-row may be provided with an adjusting assembly, so that the distance between the first mounting surface and the second mounting surface is equal along the thickness direction of the busbar, and thus when the busbar is mounted on the capacitor, the mounting surfaces of the screws are on the same plane, so that the screws with the same length may be used, which is beneficial to improving the standardization and reducing the assembly defective rate. Compared with the prior art, the installation surface of the screw for connecting each capacitor is set to be a plane, so that the risk of capacitor damage caused by using a longer screw at a place with smaller thickness of the busbar can be effectively reduced, or the possibility of instable installation of the busbar caused by using a shorter screw at a place with larger thickness of the busbar can be effectively reduced, and the reliability and the stability of the installation of the busbar are improved.

It can be understood that the first mounting surface and the second mounting surface both refer to mounting surfaces of screws for mounting the busbar on the capacitor and are respectively arranged on the front side and the back side of the busbar.

In addition, the busbar in the above technical solution provided by the present invention may further have the following additional technical features:

in the above technical solution, a plurality of first process holes are provided on the first sub-row; a plurality of second process holes are formed in the second sub-row; the adjusting assembly comprises a first gasket, the first gasket is arranged on the first sub-row and penetrates through the second technical hole, and the end face, far away from the first sub-row, of the first gasket is on the same plane with the second mounting face; and/or the adjusting assembly comprises a second gasket, the second gasket is arranged on the second sub-row and penetrates through the first technical hole, and the end face, far away from the second sub-row, of the second gasket is enabled to be on the same plane with the first mounting face.

The technical scheme is that the installation surface is a plane by matching the technical holes and the gaskets. For example, a first process hole is formed in the first sub-row, a second gasket is arranged on the end face of the second sub-row, the thickness of the second gasket is approximately equal to that of the first sub-row (the thickness and the number of the insulating paper also need to be considered), so that the second gasket penetrates through the first process hole, the end face, far away from the second sub-row, of the second gasket is flush with the end face, far away from the second sub-row, of the first sub-row, and a flush first mounting face is formed. The matched structure of the fabrication hole and the gasket is simple, the assembly is convenient, and the production efficiency is high. Compared with the scheme that bosses are punched on the busbar or the edgefolds are added on the busbar in the related technology, the method provided by the scheme has the advantages that the first sub-row and the second sub-row are pressed and connected through the hot pressing process, a special die does not need to be additionally arranged, and the production cost is reduced.

In the above technical solution, the busbar further includes: the insulating paper is arranged between the first sub-row and the second sub-row, and avoidance holes are formed in the insulating paper and used for penetrating through the first gasket or the second gasket; the area of the insulating paper is larger than the area of the smaller one of the first sub-row and the second sub-row; and the insulating spacers are arranged in the first process holes and the second process holes respectively, communication holes are formed in the insulating spacers and are used for penetrating the first spacers or the second spacers, so that the first spacers and the second sub-rows are arranged at intervals, and the second spacers and the first sub-rows are arranged at intervals.

The busbar that this scheme provided is provided with insulating paper between the sub-row, and insulating paper can play insulating effect, compares in insulating paint's technical scheme, and technology is simpler, is favorable to saving the cost. Simultaneously, the first sub-bar, the insulating paper and the second sub-bar are tightly pressed together through a hot pressing process, so that the busbar circuit is more compact in arrangement, stray inductance is effectively reduced, and loss of the capacitor in the using process is reduced. In addition, the area of the insulating paper is larger than the area of the smaller one of the first sub-row and the second sub-row, so that the size of the insulating paper can be reduced and the cost can be reduced on the basis of meeting the insulating effect.

Optionally, the insulating paper is arranged on the end face of the first sub-bar far away from the second sub-bar and the end face of the second sub-bar far away from the first sub-bar, so that the possibility of direct contact between the busbar and other structures in the frequency converter can be reduced, and the safety and reliability of the busbar are improved.

Optionally, a plurality of layers of insulating paper are arranged between the first sub-row and the second sub-row, so that the possibility that no insulating paper exists between the first sub-row and the second sub-row after a single layer of insulating paper is damaged in the hot pressing process is reduced, the use reliability of the busbar is improved, and the insulating effect is ensured.

On the other hand, the busbar provided by the scheme is provided with the insulating gasket, the insulating gasket is used for isolating the first gasket on the first sub-row from the second process hole on the second sub-row, or isolating the second gasket on the second sub-row from the first process hole on the first sub-row, so that the probability of discharging can be reduced, the electrical distance is shortened, and the probability of short circuit and other problems is reduced. Meanwhile, the current average fluidity is prevented from being influenced by overlarge opening by shortening the electrical distance.

In any one of the above technical solutions, the busbar further includes: the end face of the third sub-row facing the first sub-row is connected with the end face of the second sub-row far away from the first sub-row; the third sub-row is provided with the adjusting assembly, and the adjusting assembly is connected with the first sub-row and the second sub-row; the first mounting surface is a plane, and the third mounting surface of the third sub-row far away from the first sub-row is a plane.

In this scheme, female arranging still includes the third sub-row. It can be understood that, through setting up the adjustment assembly, make along female thickness direction of arranging, the distance between female first installation face and the third installation face of arranging equals to when making female arranging to install the electric capacity, the installation face of screw is on the coplanar, can use the screw of same length like this, is favorable to improving the standardization, reduces the assembly defective rate.

It is understood that the first mounting surface and the third mounting surface both refer to mounting surfaces of screws for mounting the busbar on the capacitor and are in opposite directions of the busbar respectively.

In the above technical solution, for the case that the first sub-row is provided with the first process holes and for the case that the second sub-row is provided with the second process holes, the third sub-row is provided with a plurality of third process holes, the adjusting assembly further includes a third gasket, and the third gasket is disposed on the third sub-row; the first gasket penetrates through the second technical hole and the third technical hole in sequence, and the second gasket penetrates through the third technical hole, so that the end face of the first gasket, which is far away from the first sub-row, the end face of the second gasket, which is far away from the first sub-row, and the third mounting surface are on the same plane; and/or the second gasket penetrates through the first technical hole, and the third gasket penetrates through the second technical hole and the first technical hole in sequence, so that the end face of the second gasket, which is far away from the third sub-row, the end face of the first gasket, which is far away from the third sub-row, and the first mounting surface are on the same plane.

According to the scheme, the third sub-row is added on the basis of the first sub-row and the second sub-row. The first sub-row and the third sub-row are respectively connected with two end faces of the second sub-row, namely the second sub-row is positioned between the first sub-row and the third sub-row. The first sub-row is provided with a first gasket penetrating through the thickness of the second sub-row and the thickness of the third sub-row, and similarly, the second sub-row is provided with a second gasket penetrating through the thickness of the first sub-row and the thickness of the third sub-row; and a third gasket penetrating through the thickness of the first sub-row and the thickness of the second sub-row is arranged on the third sub-row, so that the end face of the first sub-row, which is far away from the first gasket, of the first gasket, the end face of the second sub-row, which is far away from the first gasket, of the second gasket, and the third mounting face are aligned, the end face of the third sub-row, which is far away from the first gasket, of the second gasket, and the first mounting face are aligned, and further the mounting faces of screws for connecting the capacitors are aligned in the same plane.

The process hole and the gasket are matched, so that the structure is simple, the assembly is convenient, and the production efficiency is high. Meanwhile, compared with the scheme that the bosses are punched on the busbar or the folding edges are added on the busbar in the related art, the first sub-row, the second sub-row and the third sub-row are pressed and connected through a hot pressing process, a special die does not need to be additionally arranged, and the production cost is reduced.

In the above technical solution, in the case where the insulating paper is provided, the insulating paper is provided between the second sub-row and the third sub-row, and an area of the insulating paper is larger than an area of one of the second sub-row and the third sub-row, which has a smaller area; and/or for the condition that the insulating gasket is arranged, the insulating gasket is arranged in the third process hole, the insulating gasket is provided with a communication hole, and the communication hole is used for penetrating the second gasket so as to enable the second gasket and the third sub-row to be arranged at intervals.

Through being equipped with between the second sub-row and the third sub-row insulating paper, insulating paper can play insulating effect, and sets up the mode simply, simultaneously through hot pressing technology first sub-row, insulating paper, second sub-row, insulating paper and third sub-row tightly sticis together, make the compacter that arranges the circuit setting to effectual reduction stray inductance to reduce the loss in the electric capacity use. In addition, the area of the insulating paper is larger than the area of the smaller one of the third sub-row and the second sub-row, so that the size of the insulating paper can be reduced and the cost can be reduced on the basis of meeting the insulating effect.

Optionally, the insulating paper is arranged on the end face of the first sub-bar far away from the third sub-bar and the end face of the third sub-bar far away from the first sub-bar, so that the possibility of direct contact between the busbar and other structures in the frequency converter can be reduced, and the safety and reliability of the busbar are improved.

Optionally, a plurality of layers of insulating paper are arranged between the third sub-row and the second sub-row, so that the possibility that no insulating paper exists between the third sub-row and the second sub-row after a single layer of insulating paper is damaged in the hot pressing process is reduced, the use reliability of the busbar is improved, and the insulating effect is ensured.

On the other hand, the busbar provided by the scheme is provided with the insulating gasket, and the insulating gasket is used for isolating the first gasket on the first sub-row from the second process hole on the second sub-row and/or the third process hole on the third sub-row, or isolating the second gasket on the second sub-row from the first process hole on the first sub-row and/or the third process hole on the third sub-row, or isolating the third gasket on the third sub-row from the first process hole on the first sub-row and/or the second process hole on the second sub-row, so that the probability of discharge can be reduced, the electrical distance is shortened, and the probability of short circuit and other problems is reduced. Meanwhile, the current average fluidity is prevented from being influenced by overlarge opening by shortening the electrical distance.

A second aspect of the present invention provides a frequency converter, including: a capacitive component comprising a plurality of capacitors; and a busbar according to any one of the aspects of the first aspect; the positive electrode of the capacitor is connected with the first sub-row of the busbar; and the negative electrode of the capacitor is connected with the second sub-row of the busbar, and the capacitors are connected in parallel.

The frequency converter provided by the technical scheme of the second aspect of the present invention includes the busbar according to any one of the technical schemes of the first aspect, so that all the beneficial effects of any one of the technical schemes are achieved, and details are not repeated herein.

What be worth mentioning is that female arranging passes through the screw connection with electric capacity, through setting up female arranging in any one of the first aspect technical scheme for female arranging use the screw of same kind of specification can when the assembly, can effectively reduce the risk that electric capacity destroys or female arranging installation unstable possibility, improved female reliability and the stability of arranging the installation, and then reduce the assembly defective rate, improve production efficiency.

In the above technical solution, when the busbar includes a third sub-row, the negative electrodes of some of the capacitors are connected to the third sub-row, and the positive electrodes of the other part of the capacitors are connected to the third sub-row, so that the negative electrodes are connected in parallel to the plurality of capacitors connected to the third sub-row, and the positive electrodes are connected in parallel to the plurality of capacitors connected to the third sub-row, and so that two groups of capacitors connected in parallel are connected in series.

The busbar is provided with a positive connecting end and a negative connecting end, and can also be provided with an intermediate connecting end so as to be connected with a plurality of other capacitors in parallel on the basis that the capacitors are connected in parallel through the intermediate connecting end. The capacitance of the capacitor assembly can be improved by connecting the capacitors in parallel, and the larger the number of the capacitors connected in parallel, the larger the capacitance. By connecting the capacitors in series, the withstand voltage of the capacitor assembly can be increased, and the more the capacitors are connected in series, the stronger the withstand voltage is. Therefore, the third sub-row is arranged, series-parallel connection among a plurality of capacitors can be achieved, and design requirements can be met.

In the above technical solution, the capacitor assembly includes a first capacitor bank and a second capacitor bank, the first capacitor bank includes 6 capacitors, and the second capacitor bank includes 6 capacitors; the first sub-row is provided with 6 positive electrode connecting ends, and the 6 positive electrode connecting ends are correspondingly connected with 6 capacitors of the first capacitor bank one by one; the second sub-row is provided with 6 negative electrode connecting ends, and the 6 negative electrode connecting ends are correspondingly connected with 6 capacitors of the second capacitor bank one by one; and 12 middle pole connecting ends are arranged on the third sub-row, and the 12 middle pole connecting ends are respectively connected with the 6 capacitors of the first capacitor bank and the 6 capacitors of the second capacitor bank in a one-to-one correspondence manner.

Specifically, one end of each of the 12 capacitors is connected with the intermediate electrode connecting end, the other end of each of the 6 capacitors is connected with the anode connecting end, and the other end of each of the other 6 capacitors is connected with the cathode connecting end. Through setting up first electric capacity group and second electric capacity group, wherein first electric capacity group and second electric capacity group are a plurality of electric capacity and connect in parallel, can improve the capacity of electric capacity subassembly through electric capacity is parallelly connected. By connecting the first capacitor group and the second capacitor group in series, the withstand voltage of the capacitor module can be improved. Through the quantity and the series-parallel connection of reasonable setting electric capacity, compromise electric capacity and the withstand voltage of electric capacity subassembly to satisfy the designing requirement. It is understood that the number of capacitors in the first capacitor bank and the second capacitor bank may be other numbers according to different design requirements.

Optionally, 12 capacitors are arranged in a rectangular array, 4 capacitors are arranged at intervals along the long side extending direction of the rectangular array, and 3 capacitors are arranged at intervals along the short side extending direction of the rectangular array. The capacitor is arranged in a rectangular array mode through arrangement, so that the occupied space of the capacitor can be reduced, the size of the frequency converter is reduced, and the frequency converter is convenient to set.

The technical scheme of the third aspect of the invention comprises a centrifuge, which comprises: a centrifuge body; and the frequency converter according to any one of the second technical scheme, wherein the frequency converter is connected with the centrifuge body.

The centrifuge provided by the technical solution of the third aspect of the present invention includes the frequency converter according to any one of the technical solutions of the second aspect, so that all the beneficial effects of any one of the technical solutions are achieved, and details are not repeated herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a busbar according to some embodiments of the present invention;

fig. 2 is a schematic perspective view of a busbar according to another embodiment of the present invention;

fig. 3 is an exploded view of a busbar according to some embodiments of the present invention;

fig. 4 is a schematic structural diagram of a busbar according to some embodiments of the present invention;

FIG. 5 is a schematic view of the busbar shown in FIG. 4 in the direction A-A;

FIG. 6 is an exploded view of the busbar A-A shown in FIG. 4;

FIG. 7 is an enlarged view of detail B of FIG. 6;

FIG. 8 is an enlarged view of detail C of FIG. 6;

FIG. 9 is an enlarged view of detail D of FIG. 6;

fig. 10 is a schematic perspective view of a frequency converter according to some embodiments of the invention;

FIG. 11 is a schematic perspective view of the transducer shown in FIG. 10 from another perspective;

fig. 12 is a circuit diagram of a capacitive component according to some embodiments of the invention.

Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 12 is:

1, bus bar; 10 a first sub-row; 11 a first fabrication hole; 20 a second sub-row; 21 a second fabrication hole; 30 a third sub-row; 31 a third fabrication hole; 40 adjusting the component; 41 a first spacer; 42 a second shim; 43 a third gasket; 50 parts of insulating paper; 51 avoiding holes; 60 an insulating spacer; 61 a communication hole; 70 a capacitive component; 71 a first capacitor bank; 72 a second capacitor bank; 73 a fixed frame; 100 a first mounting surface; 101 a first fixing plate; 201 a second fixing plate; 300 third mounting surface.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

The bus bar, the inverter, and the centrifuge according to some embodiments of the present invention are described below with reference to fig. 1 to 12.

Some embodiments of the present application provide a busbar 1 comprising: a first sub-row 10, a second sub-row 20 and an adjustment assembly 40.

As shown in fig. 1, the end surface of the second sub-row 20 is connected to the end surface of the first sub-row 10, and the adjusting assembly 40 is disposed on the second sub-row 20 and connected to the first sub-row 10, so that the first mounting surface 100 of the first sub-row 10 away from the second sub-row 20 is a plane.

It will be appreciated that in other embodiments, the adjustment assembly 40 is disposed on the first sub-row 10 and is connected to the second sub-row 20 such that the second sub-row 20 is planar away from the second mounting surface of the first sub-row 10.

In other embodiments, the adjusting element 40 is disposed on the second sub-row 20 and connected to the first sub-row 10, and the adjusting element 40 is disposed on the first sub-row 10 and connected to the second sub-row 20, such that the first mounting surface 100 of the first sub-row 10 away from the second sub-row 20 is a plane, and the second mounting surface of the second sub-row 20 away from the first sub-row 10 is a plane.

In the above embodiment, make female the installation face that is used for wearing to establish the screw of arranging 1 upward towards same side flush through setting up adjustment assembly 40, thereby make the screw of connecting each electric capacity set up on the coplanar, and the required length that passes female arranging 1 equals, can use the screw of same specification like this can, can effectively reduce the risk of electric capacity damage or female arranging 1 installation unstable possibility, the reliability and the stability of arranging 1 installation have been improved, and then reduce the assembly defective rate, the production efficiency is improved.

It can be understood that the first sub-row 10 may be a positive electrode of the bus bar 1, the second sub-row 20 may be a negative electrode of the bus bar 1, or the second sub-row 20 may be a positive electrode of the bus bar 1, and the first sub-row 10 may be a negative electrode of the bus bar 1.

In other embodiments, the connector for mounting the busbar 1 on the capacitor may also be a bolt, a rivet, or the like.

In some embodiments, as shown in fig. 2 and 5, the busbar 1 further comprises: a third sub-row 30, an end face of the third sub-row 30 facing the first sub-row 10 being connected to an end face of the second sub-row 20 remote from the first sub-row 10; the third sub-row 30 is provided with an adjusting assembly 40, and the adjusting assembly 40 is connected with the first sub-row 10 and the second sub-row 20; the first mounting surface 100 is a plane, and the third mounting surface 300 of the third sub-row 30 away from the first sub-row 10 is a plane.

In other embodiments, the end of the third sub-row 30 facing the second sub-row 20 is connected to the end of the first sub-row 10 facing away from the second sub-row 20; the third sub-row 30 is provided with an adjusting assembly 40, and the adjusting assembly 40 is connected with the first sub-row 10 and the second sub-row 20; the second mounting surface is a plane, and the third sub-row 30 is a plane away from the third mounting surface 300 of the second sub-row 20.

It can be understood that although the third sub-row 30 is added in the present embodiment, the mounting surfaces of the bus bars 1 facing the same direction for screws to pass through can be made flush by the adjusting assembly 40, so that the screws connecting the capacitors can be arranged on the same plane, and the lengths of the screws required to pass through the bus bars 1 are equal.

Can use the screw of same specification like this can, can effectively reduce the risk of electric capacity damage or female the unstable possibility of arranging 1 installation of arranging, improve the reliability and the stability of arranging 1 installation of arranging, and then reduce the assembly defective rate, improve production efficiency.

It is understood that the busbar 1 may include a fourth sub-bar, a fifth sub-bar, etc. so that there are more connection ways between the capacitors connected to the busbar 1.

In some embodiments, as shown in fig. 3 and 4, the first sub-row 10 is provided with a plurality of first process holes 11; the second sub-row 20 is provided with a plurality of second process holes 21; the third sub-row 30 is provided with a plurality of third fabrication holes 31; the adjusting assembly 40 further includes a first spacer 41, a second spacer 42, and a third spacer 43, the first spacer 41 is disposed on the first sub-row 10 and sequentially passes through the second fabrication hole 21 and the third fabrication hole 31, the second spacer 42 is disposed on the second sub-row 20, and a portion of the second spacer 42 passes through the third fabrication hole 31, so that an end surface of the first spacer 41, an end surface of the second spacer 42, and the third mounting surface 300, which are far away from the first sub-row 10, are on the same plane. The third shim 43 is arranged on the third sub-row 30, the third shim 43 sequentially penetrates through the second fabrication hole 21 and the first fabrication hole 11, and the other part of the second shim 42 penetrates through the first fabrication hole 11, so that the end face of the second shim 42, which is far away from the third sub-row 30, the end face of the first shim 41, which is far away from the third sub-row 30, and the first mounting surface 100 are on the same plane.

This embodiment makes female all installation faces of arranging 1 positive and negative direction go up the screw flush through setting up fabrication hole and gasket matched with mode, simple structure, convenient assembling, production efficiency is high. Meanwhile, compared with the scheme that bosses are punched on the busbar 1 or the folded edges are added on the busbar 1 in the related art, the method provided by the embodiment enables the first sub-row 10 and the second sub-row 20 to be pressed together through a hot pressing process, a special die does not need to be additionally arranged, and the production cost is reduced.

Optionally, the first gasket 41, the second gasket 42, and the third gasket 43 are rivet pressing gaskets, and are respectively connected to the first sub-row 10, the second sub-row 20, and the third sub-row 30 in a one-to-one correspondence manner through a hot pressing process, so that the processing is simple and the efficiency is high.

As shown in fig. 3 and 6, in some embodiments, the busbar 1 further includes: the insulation paper 50 is arranged between the first sub-row 10 and the second sub-row 20, the insulation paper 50 is provided with an avoidance hole 51, and the avoidance hole 51 is used for penetrating through the first gasket 41 or the second gasket 42; the area of the insulating paper 50 is larger than that of the smaller one of the first sub-row 10 and the second sub-row 20.

Similarly, an insulating paper 50 is arranged between the second sub-row 20 and the third sub-row 30, and the area of the insulating paper 50 is larger than that of the smaller one of the second sub-row 20 and the third sub-row 30; an insulating gasket 60 is arranged in the third fabrication hole 31, a communication hole 61 is formed in the insulating gasket 60, and the communication hole 61 is used for penetrating the second gasket 42, so that the second gasket 42 and the third sub-row 30 are arranged at an interval.

Through being equipped with insulating paper 50 between two adjacent sub-rows, insulating paper 50 can play insulating effect, and the mode of setting is simple, and tightly sticiss first sub-row 10, insulating paper 50, second sub-row 20, insulating paper 50 and third sub-row 30 together through hot pressing technology simultaneously, makes arranging 1 circuit setting compacter of arranging to effectual reduction stray inductance, thereby reduces the loss in the electric capacity use. In addition, the size of the insulating paper 50 is reasonably set, so that the size of the insulating paper 50 can be reduced on the basis of satisfying the insulating effect, and the cost is reduced.

As shown in fig. 3, in some embodiments, the insulating paper 50 is disposed on the end surface of the first sub-row 10 away from the third sub-row 30 and the end surface of the third sub-row 30 away from the first sub-row 10, so that the possibility of direct contact between the busbar 1 and other structures in the frequency converter can be reduced, and the safety and reliability of the busbar 1 can be improved.

As shown in fig. 3, in some embodiments, a plurality of layers of insulating paper 50 are disposed between the first sub-row 10 and the second sub-row 20, so as to reduce the possibility that no insulating paper 50 is disposed between the third sub-row 30 and the second sub-row 20 after a single layer of insulating paper 50 is damaged during the hot pressing process, thereby providing reliability in use of the busbar 1 and ensuring the insulating effect. It will be appreciated that a plurality of layers of insulating paper 50 may likewise be provided between the third sub-row 30 and the second sub-row 20.

As shown in fig. 3 and 6, in some embodiments, the busbar 1 includes a plurality of insulating spacers 60, the insulating spacers 60 are disposed in the first through hole 11, the second through hole 21, and the third through hole 31, respectively, and a communication hole 61 is disposed in the insulating spacer 60, and the communication hole 61 is used for penetrating through the first spacer 41, the second spacer 42, or the third spacer 43.

Specifically, as shown in fig. 7, a third spacer 43 is inserted into the first fabrication hole 11.

In other embodiments, a second pad 42 is disposed in a portion of the first via 11, and a third pad 43 is disposed in a portion of the first via 11.

Specifically, as shown in fig. 8, a third pad 43 is disposed in a part of the second process holes 21, and the third pad 43 further has a portion protruding from the second sub-row 20 for disposing the first process holes 11; a first pad 41 is disposed in a part of the second process holes 21, and the first pad 41 further has a portion protruding from the second sub-row 20 for disposing the third process holes 31.

Specifically, as shown in fig. 9, a first spacer 41 is inserted into the third tooling hole 31.

In other embodiments, a second spacer 42 is disposed in a portion of the third via hole 31, and a first spacer 41 is disposed in a portion of the first via hole 11.

In the above embodiment, the insulating spacer 60 is provided to separate the spacer from the fabrication hole, so that the probability of discharge can be reduced, and the electrical distance can be reduced to reduce the probability of short circuit. Meanwhile, the current average fluidity is prevented from being influenced by overlarge opening by shortening the electrical distance.

In other embodiments, as shown in fig. 1, for the case where the busbar 1 comprises only the first sub-row 10 and the second sub-row 20. A plurality of first fabrication holes 11 are arranged on the first sub-row 10; the second sub-row 20 is provided with a plurality of second process holes 21; the adjusting assembly 40 includes a first spacer 41, the first spacer 41 is disposed on the first sub-row 10 and passes through the second fabrication hole 21, so that an end surface of the first spacer 41 away from the first sub-row 10 and the second mounting surface are on the same plane.

The first sub-row 10 is provided with first process holes 11, and the end face of the second sub-row 20 is provided with a second gasket 42, the thickness of the second gasket 42 is approximately equal to the thickness of the first sub-row 10, so that the second gasket 42 is inserted into the first process holes 11, and the end face of the second gasket 42 far away from the second sub-row 20 is flush with the end face of the first sub-row 10 far away from the second sub-row 20. The matched structure of the fabrication hole and the gasket is simple, the assembly is convenient, and the production efficiency is high. Meanwhile, compared with the scheme that the boss is punched on the busbar 1 or the folded edge is added to the busbar 1 in the related art, the busbar provided by the embodiment can be used for pressing the first sub-row 10 and the second sub-row 20 through a hot pressing process, a special die is not required to be additionally arranged, and the production cost is reduced.

In other embodiments, the adjusting assembly 40 includes a second gasket 42, and the second gasket 42 is disposed on the second sub-row 20 and passes through the first fabrication hole 11, so that an end surface of the second gasket 42 away from the second sub-row 20 is on the same plane as the first mounting surface 100.

As shown in fig. 10 and 11, some embodiments of the present application provide a frequency converter including: a capacitor assembly 70, and a busbar 1 according to any of the embodiments described above. Wherein the capacitive assembly 70 comprises a plurality of capacitors; the positive electrode of the capacitor is connected with the first sub-row 10 of the busbar 1; the negative pole of the capacitor is connected with the second sub-row 20 of the busbar 1, and the capacitors are connected in parallel.

The frequency converter provided in this embodiment includes the busbar 1 in any of the above embodiments, so that all the beneficial effects of any of the above embodiments are achieved, and details are not repeated herein.

It is worth mentioning that female arranging 1 passes through the screw connection with electric capacity for female arranging 1 can use the screw of same kind of specification when the assembly can, thereby can effectively reduce the risk that electric capacity destroys or female arranging 1 installs unstable possibility, has improved female reliability and the stability of arranging 1 installation, and then reduces the assembly defective rate, improves production efficiency.

In some embodiments, as shown in fig. 10 and 12, for the case that the busbar 1 includes the third sub-row 30, the negative electrode of a part of the capacitors is connected to the third sub-row 30, and the positive electrode of another part of the capacitors is connected to the third sub-row 30, so that the negative electrode is connected in parallel with the plurality of capacitors connected to the third sub-row 30, and the positive electrode is connected in parallel with the plurality of capacitors connected to the third sub-row 30, and the two sets of capacitors connected in parallel are connected in series.

The busbar 1 not only has a positive connecting end and a negative connecting end, but also can have a middle connecting end so as to be connected in series with other capacitors connected in parallel on the basis that the capacitors are connected in parallel through the middle connecting end. The capacitance of the capacitor assembly 70 can be increased by connecting capacitors in parallel, and the larger the number of capacitors connected in parallel, the larger the capacitance. By connecting the capacitors in series, the withstand voltage of the capacitor assembly 70 can be increased, and the more the capacitors are connected in series, the stronger the withstand voltage is. Thus, by providing the third sub-row 30, series-parallel connection between a plurality of capacitors can be realized to meet design requirements.

Further, as shown in fig. 10 and 12, the capacitor assembly 70 includes a first capacitor bank 71 and a second capacitor bank 72, the first capacitor bank 71 includes 6 capacitors, and the second capacitor bank 72 includes 6 capacitors; the first sub-row 10 is provided with 6 positive electrode connecting ends, and the 6 positive electrode connecting ends are correspondingly connected with 6 capacitors of the first capacitor bank 71 one by one; the second sub-row 20 is provided with 6 negative connection ends, and the 6 negative connection ends are correspondingly connected with 6 capacitors of the second capacitor bank 72 one by one; the third sub-row 30 is provided with 12 middle pole connection ends, and the 12 middle pole connection ends are respectively connected with the 6 capacitors of the first capacitor bank 71 and the 6 capacitors of the second capacitor bank 72 in a one-to-one correspondence manner.

It will be appreciated that of the 12 capacitors in figure 10, 6 capacitors belong to the first capacitor bank 71 and the other six capacitors belong to the second capacitor bank 72.

In some embodiments, as shown in fig. 4 and 11, the end surfaces of the 6 first spacers 41 and the 6 first spacers 41 can be seen from the third mounting surface 300, the end surfaces of the 6 second spacers 42 and the 6 second spacers 42 can be seen as the positive connecting end, the end surfaces of the 12 second spacers 42 and the 12 third spacers 43 can be seen as the negative connecting end, and the end surfaces of the 12 third spacers 43 and the intermediate connecting end can be seen as well.

Specifically, one end of each of the 12 capacitors is connected with the intermediate electrode connecting end, the other end of each of the 6 capacitors is connected with the anode connecting end, and the other end of each of the other 6 capacitors is connected with the cathode connecting end. By arranging the first capacitor bank 71 and the second capacitor bank 72, wherein the first capacitor bank 71 and the second capacitor bank 72 are both formed by connecting a plurality of capacitors in parallel, the capacitance of the capacitor assembly 70 can be increased by connecting the capacitors in parallel. By connecting the first capacitor group 71 and the second capacitor group 72 in series, the withstand voltage of the capacitor module 70 can be increased. By reasonably setting the number of the capacitors and the series-parallel connection, the capacity and the withstand voltage of the capacitor assembly 70 are considered, so that the design requirement is met. It is understood that the number of capacitors in the first capacitor bank 71 and the second capacitor bank 72 may be other numbers according to different design requirements.

In addition, the arrangement and the positions of the 12 capacitors are reasonably arranged, so that the intermediate-level connecting ends can be intensively arranged to reduce the area of the third sub-row 30, and the cost is reduced.

Optionally, a first fixing plate 101 is disposed on the first sub-row 10 of the busbar 1, and the first fixing plate 101 is connected to one of the housing of the frequency converter and the fixing frame 73 of the capacitor assembly 70; a second fixing plate 201 is arranged on the second sub-row 20 of the busbar 1, and the second fixing plate 201 is connected with the other of the shell of the frequency converter and the fixing frame 73 of the capacitor assembly 70; the first fixing plate 101 and the second fixing plate 201 are spaced apart from each other.

In some embodiments, as shown in fig. 11, a first fixing plate 101 is disposed on the first sub-row 10 of the busbar 1, and the first fixing plate 101 is connected to one of the housing of the frequency converter and the fixing frame 73 of the capacitor assembly 70; a second fixing plate 201 is arranged on the second sub-row 20 of the busbar 1, and the second fixing plate 201 is connected with the other of the shell of the frequency converter and the fixing frame 73 of the capacitor assembly 70; the first fixing plate 101 and the second fixing plate 201 are spaced apart from each other.

Through setting up first fixed plate 101 and second fixed plate 201, make female 1 of arranging link to each other with the casing of converter respectively to and with the fixed frame 73 of capacitor assembly 70, can improve female installation stability who arranges 1, reduce female possibility of arranging 1 instable. The fixing frame 73 is used for fixing and installing the capacitor, so that the capacitor is more stable.

Some embodiments of the present application provide a centrifuge comprising: a centrifuge body; and the frequency converter in any embodiment is connected with the centrifuge body.

Alternatively, the frequency converter is used in a centrifugal refrigeration compressor.

The centrifuge provided in this embodiment includes the frequency converter in any of the above embodiments, so that all the beneficial effects of any of the above embodiments are achieved, and details are not described herein.

The bus bar, the frequency converter and the centrifuge provided by the present application are described as an embodiment.

At present, because a plurality of capacitors are required to be connected in series and in parallel in the frequency converter capacitor assembly 70, the traditional separated busbar 1 is often used and is vibrated. The influence of salt fog and dust seriously threatens the safety of equipment; the connection part of the separated busbar 1 is loosened and disintegrated due to long-term vibration, the breakdown between layers is caused due to the fact that moisture on the sea penetrates into the insulation, and the creepage breakdown is caused due to the fact that dust is accumulated. The installation of the capacitor surface needs to ensure the leveling, the prior general method is to punch a boss on the busbar 1 or increase the hem of the busbar 1, if the copper bar needs to be stretched in the process of punching the boss, the thickness of the boss is difficult to ensure, and a special die is needed; if the bending is carried out, the bending periphery can be folded after blanking, the current uniformity is influenced, the processing technology is complex if numerical control bending is carried out, and a special die is needed for die bending. Above two kinds of ways all can cause the installation face of screw not in the coplanar, need use the bolt of different length when installation electric capacity, and production operation is easy the wrong dress, causes electric capacity to damage or fix not tight.

Therefore, the embodiment provides a busbar 1 structure, which comprises three copper bars (a first sub-bar 10, a second sub-bar 20 and a third sub-bar 30) including an anode, a cathode and an intermediate piece, wherein the different poles are separated by insulating paper 50, and the copper bars and the insulating paper 50 are tightly pressed together by a hot pressing process, so that stray inductance can be effectively reduced. The contact surface of three copper bar utmost point and electric capacity and screw installation face are guaranteed at the coplanar through the pressure riveting gasket, use during the assembly the screw of same kind of specification can, reduce the assembly defective rate, and the gasket simple process is riveted to the pressure simultaneously, and production efficiency is high. The copper bar pole that the gasket passed directly increases insulating gasket 60 with the gasket, reduces the electrical distance, avoids breaing up too big influence electric current average current degree. It will be appreciated that the dielectric spacers 60 are the same thickness as the corresponding copper bars. Copper bar poles which may damage the insulation paper 50 during hot pressing are increased by two insulation papers 50, so that the insulation effect is ensured.

Specifically, as shown in fig. 6 to 9, the first sub-row 10 is a negative copper row, the second sub-row 20 is a positive copper row, the third sub-row 30 is a middle copper row, the direction from the first sub-row 10 to the third sub-row 30 is from left to right, the gasket is pressed and riveted on the right of the negative copper row, the gaskets are pressed and riveted on the two ends of the positive copper row, and the gasket is pressed and riveted on the left of the middle copper row; the height of the gasket is determined according to the thickness of the three polar copper bars and the thickness and the number of the insulating paper 50, so that the capacitor mounting surfaces are ensured to be on the same plane, and the screw mounting surfaces are also on the same plane; the screw of same specification can be used during the assembly, reduces the assembly defective rate, and the gasket simple process is riveted to the pressure simultaneously, and production efficiency is high.

The capacitor assembly 70 comprises a first capacitor group 71 and a second capacitor group 72 which are formed by connecting two groups of 6 capacitors in parallel, the first capacitor group 71 and the second capacitor group 72 are connected in series, and current equalization can be better realized by reasonably setting the positions of the 12 capacitors.

In summary, the busbar 1 and the frequency converter provided in this embodiment have at least the following beneficial effects: the installation face through pressing the riveting assurance screw is at the coplanar, and installation electric capacity can use same specification bolt, can effectively reduce the risk of electric capacity damage or female the unstable possibility of arranging 1 installation, has improved the reliability and the stability of arranging 1 installation, and then reduces the assembly defective rate, improves production efficiency. The pressure riveting gasket is simple to process and high in efficiency. By arranging the insulating paper 50 and the insulating gasket 60, stray inductance of the busbar 1 is small. Through the reasonable arrangement of the sequencing and the position of the capacitors on the busbar 1, the intermediate-level connecting ends can be arranged in a concentrated manner, the area of the third sub-row 30 is reduced, the cost is reduced, the space occupied by the capacitor assembly 70 is reduced, and the size of the frequency converter is reduced. Meanwhile, the first capacitor group 71 formed by connecting a plurality of capacitors in parallel and the second capacitor group 72 formed by connecting a plurality of capacitors in parallel are connected in series, so that the current can be better equalized.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A busbar, comprising:

a first sub-row;

the end face of the second sub-row is connected with the end face of the first sub-row;

the adjusting assembly is arranged on the first sub-row and connected with the second sub-row; and/or the second sub-row is arranged on the second sub-row and is connected with the first sub-row;

the first sub-row is far away from the first mounting surface of the second sub-row and/or the second sub-row is far away from the second mounting surface of the first sub-row and is a plane;

a plurality of first process holes are formed in the first sub-row;

a plurality of second process holes are formed in the second sub-row;

the adjusting assembly comprises a first gasket, the first gasket is arranged on the first sub-row and penetrates through the second technical hole, and the end face, far away from the first sub-row, of the first gasket is on the same plane with the second mounting face; and/or the adjusting assembly comprises a second gasket, the second gasket is arranged on the second sub-row and penetrates through the first technical hole, so that the end face, away from the second sub-row, of the second gasket is on the same plane with the first mounting surface;

the first mounting surface and the second mounting surface are mounting surfaces of screws for mounting the busbar on the capacitor.

2. The busbar according to claim 1, further comprising:

the insulating paper is arranged between the first sub-row and the second sub-row, and avoidance holes are formed in the insulating paper and used for penetrating through the first gasket or the second gasket; the area of the insulating paper is larger than the area of the smaller one of the first sub-row and the second sub-row; and/or

The insulating spacers are arranged in the first technical holes and the second technical holes respectively, communication holes are formed in the insulating spacers and used for penetrating the first spacers or the second spacers, so that the first spacers and the second sub-rows are arranged at intervals, and the second spacers and the first sub-rows are arranged at intervals.

3. The busbar according to claim 1 or 2, further comprising:

the end face of the third sub-row facing the first sub-row is connected with the end face of the second sub-row far away from the first sub-row;

the third sub-row is provided with the adjusting assembly, and the adjusting assembly is connected with the first sub-row and the second sub-row;

the first mounting surface is a plane, and the third mounting surface of the third sub-row far away from the first sub-row is a plane.

4. The busbar according to claim 3,

for the condition that the first sub-row is provided with a first process hole and the second sub-row is provided with a second process hole, the third sub-row is provided with a plurality of third process holes, the adjusting assembly further comprises a third gasket, and the third gasket is arranged on the third sub-row;

the first gasket penetrates through the second technical hole and the third technical hole in sequence, and the second gasket penetrates through the third technical hole, so that the end face of the first gasket, which is far away from the first sub-row, the end face of the second gasket, which is far away from the first sub-row, and the third mounting surface are on the same plane; and/or the second gasket penetrates through the first technical hole, and the third gasket penetrates through the second technical hole and the first technical hole in sequence, so that the end face of the second gasket, which is far away from the third sub-row, the end face of the first gasket, which is far away from the third sub-row, and the first mounting surface are on the same plane.

5. The busbar according to claim 4,

for the case where the insulating paper is provided, the insulating paper is provided between the second sub-row and the third sub-row, and the area of the insulating paper is larger than the area of the smaller one of the second sub-row and the third sub-row; and/or

And for the condition that the insulating gasket is arranged, the insulating gasket is arranged in the third process hole, a communication hole is formed in the insulating gasket and used for penetrating the second gasket, so that the second gasket and the third sub-row are arranged at intervals.

6. A frequency converter, comprising:

a capacitive component comprising a plurality of capacitors;

and a busbar according to any one of claims 1 to 5;

the positive electrode of the capacitor is connected with the first sub-row of the busbar; and the negative electrode of the capacitor is connected with the second sub-row of the busbar, and the capacitors are connected in parallel.

7. The frequency converter according to claim 6,

and for the condition that the busbar comprises a third sub-row, the negative electrodes of part of the capacitors are connected with the third sub-row, the positive electrodes of the other part of the capacitors are connected with the third sub-row, so that the negative electrodes are connected with the plurality of capacitors connected with the third sub-row in parallel, the positive electrodes are connected with the plurality of capacitors connected with the third sub-row in parallel, and the two groups of capacitors connected in parallel are connected in series.

8. The frequency converter according to claim 7,

the capacitor assembly comprises a first capacitor bank and a second capacitor bank, the first capacitor bank comprises 6 capacitors, and the second capacitor bank comprises 6 capacitors;

the first sub-row is provided with 6 positive electrode connecting ends, and the 6 positive electrode connecting ends are correspondingly connected with 6 capacitors of the first capacitor bank one by one;

the second sub-row is provided with 6 negative electrode connecting ends, and the 6 negative electrode connecting ends are correspondingly connected with 6 capacitors of the second capacitor bank one by one;

and 12 middle pole connecting ends are arranged on the third sub-row, and the 12 middle pole connecting ends are respectively connected with the 6 capacitors of the first capacitor bank and the 6 capacitors of the second capacitor bank in a one-to-one correspondence manner.

9. A centrifuge, comprising:

a centrifuge body;

and a frequency converter according to any one of claims 6 to 8, the frequency converter being connected to the centrifuge body.