CN213846516U - Busbar structure and frequency converter - Google Patents

Abstract

The utility model discloses a bus bar structure and a frequency converter, wherein the bus bar structure comprises a capacitor plate and a bus bar, and the capacitor plate is used for installing a capacitor; the busbar is provided with a plurality of positive terminals and a plurality of negative terminals, one positive terminal and one negative terminal are arranged alternately, and the plurality of positive terminals and the plurality of negative terminals are connected with the capacitor plate. The utility model provides a female structure of arranging can reduce the stray inductance between the circuit device.

Description

Busbar structure and frequency converter

Technical Field

The utility model relates to an electrical equipment technical field, in particular to female structure and converter of arranging.

Background

Frequency converters generally use laminated busbars to complete the electrical connection of each core unit device in a dc circuit.

In the related technology, the laminated busbar is provided with positive and negative terminals, all circuit devices electrically connected with the laminated busbar are connected with the positive and negative terminals of the laminated busbar, and the space surrounded by a commutation loop of the circuit devices is large, so that the stray inductance between each circuit device and a lead is large, and the stray inductance distribution of different devices is extremely uneven, thereby affecting the load performance of the frequency converter.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a female structure and converter of arranging aims at reducing the stray inductance between the circuit device.

In order to achieve the above object, the utility model provides a female structure of arranging is applied to the converter, female structure of arranging includes:

a capacitive plate for mounting a capacitor;

the bus bar is provided with a plurality of positive terminals and a plurality of negative terminals, one the positive terminals and the negative terminals are alternately arranged, and the positive terminals and the negative terminals are connected with the capacitor plate.

In an embodiment of the present invention, the bus bar has a first side edge, and the bus bar includes a first sub-bar, an insulating layer, and a second sub-bar stacked in sequence;

the plurality of positive terminals are arranged on the first sub-row at intervals and arranged along the first side edge, and at least part of each positive terminal protrudes out of the first side edge;

the plurality of negative terminals are arranged on the second sub-row at intervals and arranged along the first side edge, and each negative terminal at least partially protrudes out of the first side edge, so that the positive terminals and the negative terminals are alternately arranged along the first side edge.

In an embodiment of the present invention, the first sub-row includes a plurality of positive copper bars, the plurality of positive copper bars are disposed on the insulating layer at intervals, and each positive copper bar is provided with at least one positive terminal;

and/or, the second sub-row includes a plurality of negative copper bars, and is a plurality of negative copper bar interval set up in the insulating layer, each the negative copper bar is equipped with at least one the negative terminal.

In an embodiment of the present invention, the distance between any two adjacent positive terminals is equal to the distance between any two adjacent negative terminals.

In an embodiment of the present invention, the capacitor plate includes a connecting member and two PCB plates, two ends of the connecting member are respectively connected to the two PCB plates, and the PCB plates are used for installing a capacitor;

each PCB is electrically connected with a plurality of positive terminals and a plurality of negative terminals.

In an embodiment of the present invention, the adjacent one of the positive terminal and the one of the negative terminal form a connection terminal, each of the connection terminals is located between two of the PCB boards, and each of the PCB boards is connected to at least one of the connection terminals.

In an embodiment of the present invention, the capacitor plate is provided with a plurality of conductive vias disposed at intervals, each of the conductive vias is electrically connected to one of the positive terminals and one of the negative terminals, and the conductive vias are used for installing capacitors.

The utility model discloses an in the embodiment, a plurality of mounting holes that the interval set up are seted up to the electric capacity board, the mounting hole be used for with the electric capacity board installation is fixed.

In an embodiment of the present invention, the distance between any adjacent positive terminal and negative terminal is equal.

Furthermore, the utility model also provides a frequency converter, include:

the busbar structure is described above; and

the capacitor bank comprises a plurality of capacitors, and the capacitors are arranged on the capacitor plates at intervals.

The bus bar structure in the technical scheme of the utility model comprises a capacitor plate and a bus bar, wherein the capacitor plate is used for installing a capacitor; female arranging is equipped with a plurality of positive terminals and a plurality of negative terminal, and positive terminal and negative terminal set up in turn, and a plurality of positive terminals and a plurality of negative terminal are connected with the condenser plate. Therefore, each positive terminal and an adjacent negative terminal form a group of connecting terminals, the plurality of positive terminals and the plurality of negative terminals form a plurality of groups of connecting terminals, each circuit device installed on the busbar is electrically connected with the capacitor plate through the group of connecting terminals to form a commutation loop, and the space surrounded by each commutation loop is small, so that stray inductance between the circuit devices can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a partial structural schematic diagram of a busbar structure in the prior art;

fig. 2 is a schematic structural view of the bus bar structure of the present invention;

fig. 3 is a cross-sectional structure diagram of a busbar structure in the prior art;

FIG. 4 is an enlarged structural view of part A in FIG. 3

Fig. 5 is a schematic cross-sectional structure view of the busbar structure in fig. 2;

fig. 6 is an enlarged structural view of a portion B in fig. 5.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Capacitor plate	21	Positive terminal
11	PCB board	22	Negative terminal
				12	Conductive vias	3	Capacitor with a capacitor element
13	Mounting hole	4	Transistor with a metal gate electrode
				2	Bus bar

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout this document, "and/or" is meant to include three juxtaposed aspects, exemplified by "A and/or B," including either the A aspect, or the B aspect, or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a female 2 structures of arranging is applied to the converter.

In the embodiment of the present invention, as shown in fig. 1 and fig. 2, the bus bar 2 structure includes a capacitor plate 1 and a bus bar 2, and the capacitor plate 1 is used for installing a capacitor 3; the busbar 2 is provided with a plurality of positive terminals 21 and a plurality of negative terminals 22, one positive terminal 21 and one negative terminal 22 are alternately arranged, and the plurality of positive terminals 21 and the plurality of negative terminals 22 are connected with the capacitor plate 1.

In this embodiment, the capacitor plate 1 may be a circuit board, a plurality of capacitors 3 may be mounted on the capacitor plate 1, and the plurality of capacitors 3 may be arranged on two opposite end surfaces of the capacitor plate 1 in an array.

The busbar 2 is used for connecting the capacitor plate 1 and a circuit device, one end of the busbar 2 is provided with a plurality of positive terminals 21 and a plurality of negative terminals 22, and one positive terminal 21 and one negative terminal 22 are alternately arranged on the busbar 2. The busbar 2 is connected with the capacitor plate 1 through a plurality of positive terminals 21 and a plurality of negative terminals 22, and one end of the busbar 2, which is far away from the capacitor plate 1, is connected with a circuit device. The positive terminal 21 and the negative terminal 22 are used as a power supply terminal and a signal transmission terminal of the capacitor plate 1, so that the circuit device is in electrical signal interaction with the capacitor plate 1 through the busbar 2. The positive terminal 21 and the negative terminal 22 may be metal electrode plates to serve as a medium for outputting or inputting electrical signals.

In order to better explain the present embodiment, referring to fig. 1 and fig. 2, fig. 1 shows a structural design of a conventional busbar 2, fig. 2 shows a structural design of a busbar 2 of the present embodiment, and a dashed line in fig. 1 and fig. 2 equivalently represents a commutation loop of current. Only a set of positive terminal 21 and negative terminal 22 are designed in the existing design, the busbar 2 is connected with the capacitor plate 1 through the set of positive terminal 21 and negative terminal 22, after each circuit electric appliance is connected into the busbar 2, the busbar needs to be electrically connected with the capacitor 3 on the capacitor plate 1 through the set of positive terminal 21 and negative terminal 22, as can be seen from fig. 1, the commutation loop of the current in the existing design is longer, the space area enclosed by the commutation loop is also larger, and meanwhile, when the positions of the circuit devices connected into the busbar 2 are different, the size difference of the space area enclosed by the equivalent commutation loop is larger. That is to say, in the existing design, the stray inductance between circuit devices is large, and the stray inductance between circuit devices is unevenly distributed, which results in large inductance interference between circuit devices, and the frequency converter made by the design has weak load bearing capacity and weak load fluctuation resistance. Since the bus bar 2 provided in this embodiment is provided with the plurality of positive terminals 21 and the plurality of negative terminals 22 alternately arranged at intervals, when each circuit device is connected to the bus bar 2, each circuit device can be electrically connected to the capacitor 3 on the capacitor plate 1 through the adjacent group of positive terminals 21 and the adjacent group of negative terminals 22, so that the stroke of the commutation loop is reduced, and the space enclosed by the commutation loop is reduced; the size of a space region enclosed by the equivalent commutation loop is equivalent, and the distribution of stray inductance among circuit devices is uniform. In addition, the stray inductance of the two corresponding commutation loops can be further reduced in a parallel connection mode between the two sets of positive terminals 21 and negative terminals 22. Therefore, the inductance interference among the circuit devices is small, and the frequency converter designed and manufactured by the scheme of the embodiment has strong load bearing capacity and strong load fluctuation resistance.

In the technical scheme of the embodiment, each positive terminal 21 and an adjacent negative terminal 22 form a group of connection terminals, the positive terminals 21 and the negative terminals 22 form a plurality of groups of connection terminals, each circuit device installed on the busbar 2 is electrically connected with the capacitor plate 1 through the group of connection terminals to form a commutation loop, and the space surrounded by each commutation loop is small, so that stray inductance between the circuit devices can be reduced.

In an embodiment of the present invention, as shown in fig. 2, the bus bar 2 has a first side (not shown), and the bus bar 2 includes a first sub-bar (not shown), an insulating layer (not shown) and a second sub-bar (not shown) stacked in sequence; the plurality of positive terminals 21 are arranged in the first sub-row at intervals and arranged along the first side edge, and at least part of each positive terminal 21 protrudes out of the first side edge; the negative terminals 22 are disposed at intervals along the first side edge, and each negative terminal 22 at least partially protrudes from the first side edge, so that a positive terminal 21 and a negative terminal 22 are alternately disposed along the first side edge.

In this embodiment, the first sub-row and the second sub-row are metal conductive media, such as copper foil, and the outer sides of the first sub-row and the second sub-row can be wrapped with insulators. The first sub-row and the second sub-row are respectively used for accessing two sets of reverse currents, so that stray inductance on the first sub-row and the second sub-row is offset, and stray inductance on the whole busbar 2 is reduced. The insulating layer is used for insulating and isolating the first sub-row and the second sub-row and avoiding the first sub-row and the second sub-row from being connected and short-circuited.

A plurality of positive terminals 21 and a plurality of negative terminals 22 all set up along first side, and a plurality of positive terminals 21 interval sets up on female first sub-row of arranging 2, and a plurality of negative terminals 22 interval sets up on female second sub-row of arranging 2. Therefore, the positive terminal 21 and the negative terminal 22 are convenient to distinguish, and the positive terminal 21 and the negative terminal 22 are positioned on the same side of the busbar 2, so that the busbar 2 is convenient to be connected into the capacitor plate 1.

In an embodiment of the present invention, as shown in fig. 2, the first sub-row includes a plurality of positive copper bars (not shown), the positive copper bars are disposed on the insulating layer at intervals, and each positive copper bar is provided with at least one positive terminal 21; and/or, the second sub-row comprises a plurality of negative copper bars (not shown), the negative copper bars are arranged on the insulating layer at intervals, and each negative copper bar is provided with at least one negative terminal 22.

In this embodiment, first sub-row includes the positive copper bar that a plurality of intervals set up, and each positive copper bar is provided with at least one positive terminal 21, sets up a plurality of positive copper bar intervals, can further reduce the stray inductance interference between the positive terminal 21 on the different positive copper bars.

The second sub-row includes the copper bar that a plurality of intervals set up, and each burden copper bar is provided with at least one negative terminal 22, sets up a plurality of burden copper bar intervals, can further reduce the stray inductance interference between the negative terminal 22 on the different burden copper bars.

In an embodiment of the present invention, the distance between any two adjacent positive terminals 21 is equal to the distance between any two adjacent negative terminals 22.

In the present embodiment, the pitch between any two adjacent positive electrode terminals 21 on the first sub-row and any two adjacent negative electrode terminals 22 on the second sub-row is equal, when different circuit devices are connected to the capacitor plate 1 through the positive terminal 21 and the negative terminal 22 of the busbar 2, different circuit devices are electrically connected with the capacitors 3 on the capacitor plate 1 through a plurality of groups of positive terminals 21 and negative terminals 22, the distance between every two adjacent positive terminals 21 and every two adjacent negative terminals 22 is equal, thereby ensuring that the stroke of the current conversion loop of each circuit device on the busbar 2 and the capacitor plate 1 is equal to the space enclosed by the current loop, being beneficial to reducing the stray inductance among the circuit devices, meanwhile, stray inductances of the circuit devices are uniformly distributed, so that inductance interference among the circuit devices is reduced, and the load bearing capacity and the load fluctuation resistance of the busbar 2 and the capacitor plate 1 are improved.

In an embodiment of the present invention, as shown in fig. 5 and fig. 6, the capacitor plate 1 includes a connecting member (not shown) and two PCB plates 11, two ends of the connecting member are respectively connected to the two PCB plates 11, and the PCB plates 11 are used for mounting the capacitor 3; each PCB board 11 is electrically connected to a plurality of positive terminals 21 and a plurality of negative terminals 22.

In this embodiment, the connecting member is used to connect two PCB boards 11, so that the two PCB boards 11 and the connecting member are stacked, and a space is formed between the two PCB boards through the connecting member spacer, and the space can be used to accommodate circuit components on the PCB boards 11 and pins of the capacitor 3. Each PCB 11 is electrically connected to the plurality of positive terminals 21 and the plurality of negative terminals 22 and the busbar 2 at the same time, and the capacitors 3 on the PCB 11 are electrically connected through the plurality of positive terminals 21 and the plurality of negative terminals 22.

In an embodiment of the present invention, as shown in fig. 5 and fig. 6, a positive terminal 21 and a negative terminal 22 are adjacent to each other to form a connection terminal, each connection terminal is located between two PCB boards 11, and each PCB board 11 is connected to at least one connection terminal.

In this embodiment, for better explaining the present embodiment, as shown in fig. 3 and 4, fig. 3 and 4 show a conventional design, which connects the connection terminal of the busbar 2 to one PCB 11 of the capacitor board 1, and at this time, the current flowing from the busbar 2 to the PCB 11 will be shunted by the shaded portion shown in fig. 4, and part of the current will flow to the other PCB 11 after being shunted, so that the shaded portion on the PCB 11 shown in fig. 4 will bear the whole commutation current, resulting in a large ripple current load of the PCB. And combine the structural design of this embodiment that fig. 5 and fig. 6 show, through on inserting two PCB 11 respectively with a plurality of connecting terminal of female row 2, the electric current on female row 2 will shunt to two PCB 11 through connecting terminal, and two PCB 11 have shared the commutation current, and ripple current load on single PCB has equivalently reduced half, is favorable to protecting PCB 11.

In an embodiment of the present invention, as shown in fig. 2, the capacitor plate 1 is provided with a plurality of conductive vias 12 disposed at intervals, each conductive via 12 is electrically connected to a positive terminal 21 and a negative terminal 22, and the conductive vias 12 are used for mounting the capacitor 3.

In this embodiment, the conductive via 12 may be a metalized via or a solder hole, so as to solder the capacitor 3 into the conductive via 12, thereby electrically connecting the capacitor 3 and the capacitor board 1. The conductive via 12 can be opened on the PCB 11 of the capacitor board 1, and the capacitor 3 is electrically connected to the printed circuit on the PCB 11 through the conductive via 12. The conductive via 12 is electrically connected to a positive terminal 21 and a negative terminal 22 to connect the capacitor 3 into the capacitor plate 1, the bus bar 2 and the circuit loop of the circuit device.

In an embodiment of the present invention, as shown in fig. 2, the capacitor plate 1 is provided with a plurality of mounting holes 13 disposed at intervals, and the mounting holes 13 are used to fix the capacitor plate 1.

In this embodiment, the mounting hole 13 is used to mount and fix the capacitor plate 1 in a device such as an inverter, and the mounting hole 13 can be matched with a screw, or the like to mount and fix the capacitor plate 1, so that the capacitor plate 1 can be reliably fixed in the device such as the inverter, and the stability and reliability of the capacitor plate during operation are ensured.

In an embodiment of the present invention, as shown in fig. 2, the distance between any adjacent positive terminal 21 and negative terminal 22 is equal.

In this embodiment, when the distance between any adjacent positive terminal 21 and negative terminal 22 is equal, and different circuit devices are connected to the capacitor plate 1 through the positive terminal 21 and the negative terminal 22 of the busbar 2, different circuit devices are electrically connected to the capacitor 3 on the capacitor plate 1 through multiple sets of the positive terminal 21 and the negative terminal 22, and the distance between each set of the positive terminal 21 and the negative terminal 22 is equal, so that the stroke of the commutation loop of each circuit device on the busbar 2 and the capacitor plate 1 is equal to the space enclosed by the current loop, which is beneficial to reducing the stray inductance between the circuit devices, and meanwhile, the stray inductance interference between the circuit devices is favorably reduced, and the load carrying capacity and the load fluctuation resistance capacity of the busbar 2 and the capacitor plate 1 are improved.

Furthermore, the utility model also provides a converter, this converter includes female structure and the electric capacity group of arranging in the above-mentioned embodiment, and the electric capacity group includes a plurality of electric capacity 3, and a plurality of electric capacity 3 intervals set up in electric capacity board 1.

In this embodiment, the plurality of capacitors 3 may be distributed in the capacitor plate 1 in an array manner, one end of the busbar 2 is connected to the capacitor plate 1 through the positive terminal 21 and the negative terminal 22, and the other end of the busbar 2 is connected to the circuit device, so that the circuit device performs electrical signal interaction with the plurality of capacitors 3 through the busbar 2 and the capacitor plate 1.

The specific structure of the busbar structure refers to the above embodiments, and since the frequency converter adopts all technical solutions of all the above embodiments, the frequency converter at least has all the beneficial effects brought by the technical solutions of the above embodiments, and further description is omitted here

Optionally, the frequency converter further includes a transistor 4, the transistor 4 is configured to convert dc power and ac power, the transistor 4 is connected to an end of the bus bar 2 away from the capacitor plate 1, an alternating current flowing in the transistor 4 is converted into a dc current under the action of the transistor 4, and the dc current is input to the bus bar 2 and the capacitor plate 1 for use.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims (10)

1. The utility model provides a female structure of arranging is applied to the converter, its characterized in that, female structure of arranging includes:

a capacitive plate for mounting a capacitor;

the bus bar is provided with a plurality of positive terminals and a plurality of negative terminals, one the positive terminals and the negative terminals are alternately arranged, and the positive terminals and the negative terminals are connected with the capacitor plate.

2. The busbar structure according to claim 1, wherein the busbar has a first side edge, and the busbar comprises a first sub-row, an insulating layer and a second sub-row which are sequentially stacked;

the plurality of positive terminals are arranged on the first sub-row at intervals and arranged along the first side edge, and at least part of each positive terminal protrudes out of the first side edge;

the plurality of negative terminals are arranged on the second sub-row at intervals and arranged along the first side edge, and each negative terminal at least partially protrudes out of the first side edge, so that the positive terminals and the negative terminals are alternately arranged along the first side edge.

3. The busbar structure according to claim 2, wherein the first sub-row comprises a plurality of positive copper bars, the positive copper bars are arranged on the insulating layer at intervals, and each positive copper bar is provided with at least one positive terminal;

and/or, the second sub-row includes a plurality of negative copper bars, and is a plurality of negative copper bar interval set up in the insulating layer, each the negative copper bar is equipped with at least one the negative terminal.

4. The busbar structure according to claim 2, wherein a pitch between any two adjacent positive terminals is equal to a pitch between any two adjacent negative terminals.

5. The busbar structure according to any one of claims 1 to 4, wherein the capacitor plates comprise a connecting piece and two PCB plates, two ends of the connecting piece are respectively connected with the two PCB plates, and the PCB plates are used for mounting capacitors;

each PCB is electrically connected with a plurality of positive terminals and a plurality of negative terminals.

6. The busbar structure according to claim 5, wherein adjacent ones of said positive terminal and said negative terminal form a connecting terminal, each of said connecting terminals is located between two of said PCBs, and each of said PCBs is connected to at least one of said connecting terminals.

7. The busbar structure according to any one of claims 1 to 4, wherein the capacitor plate is provided with a plurality of conductive vias arranged at intervals, each conductive via is electrically connected with one of the positive terminal and the negative terminal, and the conductive vias are used for mounting a capacitor.

8. The busbar structure according to any one of claims 1 to 4, wherein the capacitor plate is provided with a plurality of mounting holes arranged at intervals, and the mounting holes are used for mounting and fixing the capacitor plate.

9. The busbar structure according to any of claims 1 to 4, wherein the spacing between any adjacent positive and negative terminals is equal.

10. A frequency converter, comprising:

a busbar structure according to any one of claims 1 to 9; and

the capacitor bank comprises a plurality of capacitors, and the capacitors are arranged on the capacitor plates at intervals.

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