CN214101197U - Frequency converter and rectifier bridge electric protection structure thereof - Google Patents
Frequency converter and rectifier bridge electric protection structure thereof Download PDFInfo
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- CN214101197U CN214101197U CN202022686874.0U CN202022686874U CN214101197U CN 214101197 U CN214101197 U CN 214101197U CN 202022686874 U CN202022686874 U CN 202022686874U CN 214101197 U CN214101197 U CN 214101197U
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Abstract
The utility model discloses a converter and rectifier bridge electrical protection structure thereof. The rectifier bridge electrical protection structure comprises a cover body and an electrical isolation baffle, wherein the cover body is configured to be connected with a driving plate of a rectifier bridge, the cover body and the driving plate define a space, the rectifier bridge is located in the space, and an input terminal and positive and negative copper bar terminals of the rectifier bridge extend to the outside of the space through a through hole in the cover body; the electric isolation baffle is connected with the cover body and extends towards the outer side of the cover body so as to isolate the input terminal of the rectifier bridge from the positive and negative copper bar terminals. This rectifier bridge electrical protection structure is through the electrical isolation separation blade that outwards extends from the cover body to keep apart the input terminal of rectifier bridge with positive and negative copper bar terminal, thereby guarantee the safe distance between input terminal and the positive and negative copper bar terminal, avoid arousing the risk that creepage distance is close.
Description
Technical Field
The embodiment of the utility model provides a converter field especially relates to a rectifier bridge electrical protection structure for converter to and including above-mentioned rectifier bridge electrical protection structure's converter.
Background
The frequency converter is an electric control device which applies a frequency conversion technology and a microelectronic technology and controls an alternating current motor by changing the frequency mode of a working power supply of the motor. The frequency converter mainly comprises a rectifying unit, a direct current unit and an inversion unit. With the continuous improvement of the industrial automation degree, the special requirements of various production equipment on power supply are also continuously increased, and the frequency converter can adjust the voltage and the frequency of an output power supply and provide the required power supply voltage according to the actual requirements of the motor so as to save energy and regulate speed, so that the frequency converter is more and more emphasized in the production field.
The following problems often appear when installing and using the frequency converter on the market at present: the rectifier bridge terminals and the mounting hole sites are vertically symmetrical, and workers are easy to reversely mount the rectifier bridge to enable the positive electrode and the negative electrode to be reversed; the space interval between the input terminal of the rectifier bridge and the positive and negative terminals is only 10mm, and the space interval between the input terminal and the positive and negative terminals is easily too small when the cable is fixed on the input terminal of the rectifier bridge, so that ignition is easily caused; when explosion is caused by short circuit of the rectifier bridge, air waves and sparks are easy to be sprayed out of the machine to ignite other flammable objects on site, so that fire is caused; the direction of the input cable led out from the rectifier bridge is not controllable during installation, and manual control is needed.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to solve at least one of the above problems and disadvantages in the prior art.
According to an embodiment of an aspect of the present invention, there is provided a rectifier bridge electrical protection structure, including a cover body and an electrical isolation barrier, the cover body configured to be connected to a drive plate of a rectifier bridge, the cover body and the drive plate defining a space, the rectifier bridge being located in the space, an input terminal and positive and negative copper bar terminals of the rectifier bridge extending to the outside of the space via a through hole on the cover body; the electric isolation baffle is connected with the cover body and extends towards the outer side of the cover body so as to isolate the input terminal of the rectifier bridge from the positive and negative copper bar terminals.
In some embodiments, the electrically isolating flap includes a base portion and a body portion, the base portion being connected to the enclosure; the main body portion is connected to the base portion and is configured to isolate the input terminals of the rectifier bridge from the positive and negative copper bar terminals.
In some embodiments, the base portion has a hole formed therein through which an input terminal of the rectifier bridge passes.
In some embodiments, the hole locations are adapted to copper sheets for input terminals of the rectifier bridge.
In some embodiments, the rectifier bridge is provided with a positioning portion, and the cover body of the rectifier bridge protection structure is provided with a complementary positioning portion engaged with the positioning portion.
In some embodiments, the positioning portion on the rectifier bridge is a positioning groove, and the complementary positioning portion on the cover body is a positioning protrusion.
In some embodiments, the rectifier bridge electrical protection structure further includes a limiting mechanism disposed on an outer side of the cover body, the limiting mechanism configured to limit an outgoing direction of an input cable of the rectifier bridge.
In some embodiments, the rectifier bridge electrical protection structure is integrally formed.
In some embodiments, the rectifier bridge electrical protection structure is made of plastic.
According to an embodiment of another aspect of the present invention, there is provided a frequency converter, which includes the rectifier bridge electrical protection structure as described above.
According to the utility model discloses above-mentioned various embodiments's converter and rectifier bridge electrical protection structure thereof is through the electrical isolation separation blade from the outside extension of cover body to keep apart the input terminal of rectifier bridge with positive negative copper bar terminal, thereby guarantee the safe distance between input terminal and the positive negative copper bar terminal, avoid arousing the risk that creepage distance is close.
Drawings
These and/or other aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural view of an electrical protection structure of a rectifier bridge according to an exemplary embodiment of the present invention;
fig. 2 shows a further schematic representation of an electrical protection arrangement for a rectifier bridge according to an exemplary embodiment of the present invention;
fig. 3 shows a schematic structural diagram of a part of a frequency converter according to an exemplary embodiment of the present invention;
fig. 4 shows another schematic structural view of a part of a frequency converter according to an exemplary embodiment of the present invention;
fig. 5 shows a cross-sectional view of a part of a frequency converter according to an exemplary embodiment of the present invention; and
fig. 6 shows a further structural schematic of a part of a frequency converter according to an exemplary embodiment of the present invention.
Detailed Description
While the present invention will be fully described with reference to the accompanying drawings, which contain preferred embodiments of the invention, it is to be understood that those skilled in the art can, prior to this description, modify the embodiments described herein while obtaining the technical effects of the invention. Therefore, it should be understood that the foregoing description is a broad disclosure directed to persons of ordinary skill in the art, and is not intended to limit the exemplary embodiments of the invention described herein.
Furthermore, in the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the disclosure. It may be evident, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in schematic form in order to simplify the drawing.
According to the present general inventive concept, there is provided a rectifier bridge electrical protection structure, including a cover body and an electrical isolation barrier, the cover body configured to be connected to a drive plate of a rectifier bridge, the cover body and the drive plate defining a space, the rectifier bridge being located in the space, an input terminal and positive and negative copper bar terminals of the rectifier bridge extending to the outside of the space via a through hole on the cover body; the electric isolation baffle is connected with the cover body and extends towards the outer side of the cover body so as to isolate the input terminal of the rectifier bridge from the positive and negative copper bar terminals.
According to another general inventive concept of the present invention, there is provided a frequency converter comprising the rectifier bridge electrical protection structure as described above.
Fig. 1 shows a schematic structural view of an electrical protection structure of a rectifier bridge according to an exemplary embodiment of the present invention; fig. 2 shows a further schematic representation of an electrical protection arrangement for a rectifier bridge according to an exemplary embodiment of the present invention; fig. 3 shows a schematic structural diagram of a part of a frequency converter according to an exemplary embodiment of the present invention; fig. 4 shows another schematic structural view of a part of a frequency converter according to an exemplary embodiment of the present invention; fig. 5 shows a cross-sectional view of a part of a frequency converter according to an exemplary embodiment of the present invention; and fig. 6 shows a further structural schematic of a part of a frequency converter according to an exemplary embodiment of the present invention.
In an exemplary embodiment, as shown in fig. 1 to 4, a rectifier bridge electrical protection structure 10 according to the present invention comprises a cover body and an electrical isolation barrier 3. The cover is configured to be connected to the drive plate 30 of the rectifier bridge 20, the cover and the drive plate 30 define a space in which the rectifier bridge (20A, 20B, 20C) is located, as shown in fig. 6, the rectifier bridge 20 includes a rectifier bridge body 21, and an input terminal 22, a positive copper bar terminal 23, and a negative copper bar terminal 24 provided on the rectifier bridge body 21, the input terminal 22 being for connection with an input cable (27B, 27C), the positive copper bar terminal 23 and the negative copper bar terminal 24 being connected to the rectifier bridge positive and negative copper bars 50, respectively. A through hole 7 is formed on the cover body, and an input terminal 22 and positive and negative copper bar terminals (23, 24) of the rectifier bridges (20A, 20B, 20C) extend to the outside of the space through the through hole 7 on the cover body. The electric isolation separation blade 3 is connected with the cover body and extends towards the outside of the cover body to keep apart the input terminal 22 of rectifier bridge (20A, 20B, 20C) and positive and negative copper bar terminal (23, 24), thereby guarantee the safe distance between input terminal 22 and positive and negative copper bar terminal (23, 24), avoid causing the risk that creepage distance is close. In addition, the strength, height and rigidity of the electrical isolation barrier 3 make the safety distance between the input terminal 22 and the positive and negative copper bar terminals (23, 24) relatively stable. In addition, when the rectifier bridges (20A, 20B and 20C) explode due to the short circuit, the cover body can better prevent blast waves and sparks from exploding so as to avoid the blast waves and sparks from being sprayed to the outer side of the machine to cause fire.
In an exemplary embodiment, as shown in fig. 1 to 4, the cap includes a cap body 1 and a sidewall 2 connected to an outer periphery of the cap body 1 and bent toward a first side (e.g., a lower side in fig. 1) of the cap body 1, and a through hole 7 is formed on the cap body 1. The side wall 2 is formed with a connecting portion 5 connected to the drive plate 30, and the connecting portion 5 can be connected to the drive plate 30 by a bolt or the like, for example.
In an exemplary embodiment, as shown in fig. 1 and 4, the electrically isolating shutter 3 includes a base portion 31 and a main body portion 32, the base portion 31 being connected to the cover body 1; the main body portion 31 is connected to the base portion 31 and extends from the base portion 31 toward a side of the base portion away from the cover body 1 to isolate the input terminals 22 of the rectifier bridge (20A, 20B, 20C) from the positive and negative copper bar terminals (23, 24).
In an exemplary embodiment, as shown in fig. 1 and 6, a hole 31A through which the input terminal 22 of the rectifier bridge (20A, 20B, 20C) passes is formed on the base 31 to prevent the copper sheet for the input terminal 22 from moving when mounted. In the illustrated embodiment, the holes 31 are square and are adapted to fit the copper sheet of the input terminals 22, so that the holes 31 can catch the copper sheet of the input terminals 22 to prevent the copper sheet from moving during installation. However, it should be understood by those skilled in the art that in some other embodiments of the present disclosure, the hole position may also be a circular hole or the like according to the shape of the copper sheet of the input terminal 22.
In an exemplary embodiment, as shown in fig. 2 to 5, the rectifier bridge (20A, 20B, 20C) is provided with a positioning portion 25, and the inside of the cover (i.e., the side facing the drive plate 30) is provided with a complementary positioning portion 6 that engages with the positioning portion 25. Specifically, in this embodiment, the rectifier bridge (20A, 20B, 20C) is formed with a positioning groove, and the inside of the cover body is provided with a positioning projection that engages with this positioning groove. Thus, if the rectifier bridges (20A, 20B, 20C) are installed wrongly, when the cover body is covered on the rectifier bridges (20A, 20B, 20C), the complementary positioning parts 6 of the cover body cannot be combined with the positioning parts 25, and the cover body interferes with the rectifier bridges (20A, 20B, 20C), so that the cover body is tilted and cannot be installed, and the rectifier bridges (20A, 20B, 20C) are ensured to be installed correctly.
It should be noted that, although in this embodiment, the positioning portion 25 is in the form of a positioning groove, it should be understood by those skilled in the art that in other embodiments of the present disclosure, the positioning portion of the rectifier bridge may take different patterns according to the design of the rectifier bridge, for example, may take the form of a positioning protrusion, in which case, the complementary positioning portion 6 may take the form of a positioning hole or a positioning groove engaged with the positioning protrusion, and furthermore, the number of positioning grooves includes, but is not limited to, 1 or 2 as shown in the figures, and the position is not limited to that shown in the figures.
In an exemplary embodiment, as shown in fig. 3 and 4, the number of the rectifier bridges (20A, 20B, 20C) is 3, each of the rectifier bridges (20A, 20B, 20C) is provided with a positioning portion 25, and the cover is provided with a complementary positioning portion 6 engaged with each of the positioning portions 25. However, in some other embodiments of the present disclosure, the number of the rectifier bridges (20A, 20B, 20C) includes, but is not limited to, 3, such as 4 or 5, etc., as shown in the figure, and the specific number should be designed specifically according to the situation of the frequency converter.
In an exemplary embodiment, as shown in fig. 1 and 6, the rectifier bridge electrical protection structure 10 further includes a limiting mechanism (4B, 4C) disposed on an outer side of the enclosure body 1 (i.e., a side of the enclosure body 1 away from the drive plate 30), the limiting mechanism (4B, 4C) being configured to limit an outgoing direction of the input cable (27B, 27C) of the rectifier bridge (20B, 20C). Specifically, in this embodiment, the limiting mechanisms (4B, 4C) are in the form of limiting grooves, however, it should be understood by those skilled in the art that in other embodiments of the present invention, the limiting mechanisms (4B, 4C) may also be in other forms, such as restraining belts, as long as it is ensured that the outgoing direction of the input cables (27B, 27C) is effectively restrained.
In an exemplary embodiment, as shown in fig. 1 and 6, the number of the limiting mechanisms (4B, 4C) is plural, and the plural limiting mechanisms (4A, 4B) are configured to limit the input cables (27B, 27C) of the plural rectifier bridges (20B, 20C) from being led out via the same outlet position. Specifically, in this embodiment, two limiting mechanisms (4A, 4B) are shown, one of the limiting mechanisms 4B is used to limit the outgoing line direction of the input cable 27B of the rectifier bridge 20B, and the other limiting mechanism 4C is used to limit the outgoing line direction of the input cable 27C of the rectifier bridge 20C, so that the input cables (27B, 27C) of the rectifier bridges (20B, 20C) are led out via the same outgoing line position as that of the input cable of the rectifier bridge 20A. Thus, the consistency of outgoing lines can be ensured.
In an exemplary embodiment, as shown in FIG. 1, rectifier bridge electrical protection structure 10 is integrally formed to facilitate simplifying the manufacturing process. For example, the rectifier bridge electrical protection structure 10 may be formed by injection molding using plastic.
According to another aspect of the present invention, there is provided a frequency converter, which includes the rectifier bridge electrical protection structure 10 as described above. Specifically, the rectifier bridge electrical protection structure 10 includes a cover body and an electrical isolation barrier 3, the cover body is configured to be connected with a drive plate 30 of the rectifier bridge 20, the cover body and the drive plate 30 define a space in which the rectifier bridge (20A, 20B, 20C) is located, as shown in fig. 6, the rectifier bridge 20 includes a rectifier bridge body 21, and an input terminal 22, a positive copper bar terminal 23, and a negative copper bar terminal 24 that are provided on the rectifier bridge body 21, the input terminal 22 is used for being connected with an input cable, and the positive copper bar terminal 23 and the negative copper bar terminal 24 are respectively connected with a positive copper bar 50 and a negative copper bar 50 of the rectifier bridge. A through hole 7 is formed on the cover body, and an input terminal 22 and positive and negative copper bar terminals (23, 24) of the rectifier bridges (20A, 20B, 20C) extend to the outside of the space through the through hole 7 on the cover body. The electric isolation separation blade 3 is connected with the cover body and extends towards the outside of the cover body to keep apart the input terminal 22 of rectifier bridge (20A, 20B, 20C) and positive and negative copper bar terminal (23, 24), thereby guarantee the safe distance between input terminal 22 and positive and negative copper bar terminal (23, 24), avoid causing the risk that creepage distance is close.
According to the utility model discloses above-mentioned various embodiments's converter and rectifier bridge electrical protection structure thereof is through the electrical isolation separation blade from the outside extension of cover body to keep apart the input terminal of rectifier bridge with positive negative copper bar terminal, thereby guarantee the safe distance between input terminal and the positive negative copper bar terminal, avoid arousing the risk that creepage distance is close. In addition, the cover body of the electric protection structure is provided with a complementary positioning part which is jointed with the positioning part on the rectifier bridge, so that the rectifier bridge can be prevented from being installed wrongly. Furthermore, the rectifier bridge electrical protection structure further comprises a limiting mechanism arranged on the cover body to limit the outgoing direction of the input cable of the rectifier bridge. In addition, the electric protection structure of the rectifier bridge integrates the protection functions required in the installation and operation of the rectifier bridge of the frequency converter on one component, simplifies the structural layout and assembly, makes the frequency converter more compact, has high integration, can realize complex processability and reduces the part cost.
It will be appreciated by those skilled in the art that the embodiments described above are exemplary and can be modified by those skilled in the art, and that the structures described in the various embodiments can be freely combined without conflict in structure or principle.
Having described preferred embodiments of the present invention in detail, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope and spirit of the appended claims, and the invention is not to be limited to the exemplary embodiments set forth in the specification.
Claims (10)
1. A rectifier bridge electrical protection structure, characterized in that the rectifier bridge electrical protection structure comprises a cover body and an electrical isolation baffle, wherein the cover body is configured to be connected with a drive plate of a rectifier bridge, the cover body and the drive plate define a space, the rectifier bridge is positioned in the space, and an input terminal and positive and negative copper bar terminals of the rectifier bridge extend to the outside of the space through a through hole on the cover body; the electric isolation baffle is connected with the cover body and extends towards the outer side of the cover body so as to isolate the input terminal of the rectifier bridge from the positive and negative copper bar terminals.
2. The rectifier bridge electrical protection structure of claim 1, wherein the electrically isolating flap includes a base portion and a body portion, the base portion being connected to the enclosure; the main body portion is connected to the base portion and is configured to isolate the input terminals of the rectifier bridge from the positive and negative copper bar terminals.
3. A rectifier bridge electrical protection structure according to claim 2, characterized in that said base portion is formed with an aperture through which an input terminal of said rectifier bridge passes.
4. An electrical rectifier bridge protection structure according to claim 3, wherein the hole sites are adapted to copper sheets for input terminals of the rectifier bridge.
5. The electrical rectifier bridge protection structure according to claim 1, wherein a positioning portion is provided on the rectifier bridge, and a complementary positioning portion engaged with the positioning portion is provided on a cover body of the electrical rectifier bridge protection structure.
6. The electrical rectifier bridge protection structure according to claim 5, wherein the positioning portion on the rectifier bridge is a positioning groove, and the complementary positioning portion on the cover body is a positioning protrusion.
7. The rectifier bridge electrical protection structure according to claim 1, further comprising a limiting mechanism disposed on an outside of the cover body, the limiting mechanism configured to limit a direction of an outgoing line of an input cable of the rectifier bridge.
8. Rectifier bridge electrical protection structure according to one of claims 1 to 7, characterized in that it is integrally formed.
9. Rectifier bridge electrical protection structure according to claim 8, characterized in that it is made of plastic.
10. Frequency converter, characterized in that it comprises a rectifier bridge electrical protection structure according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022686874.0U CN214101197U (en) | 2020-11-19 | 2020-11-19 | Frequency converter and rectifier bridge electric protection structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022686874.0U CN214101197U (en) | 2020-11-19 | 2020-11-19 | Frequency converter and rectifier bridge electric protection structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214101197U true CN214101197U (en) | 2021-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022686874.0U Active CN214101197U (en) | 2020-11-19 | 2020-11-19 | Frequency converter and rectifier bridge electric protection structure thereof |
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| Country | Link |
|---|---|
| CN (1) | CN214101197U (en) |
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2020
- 2020-11-19 CN CN202022686874.0U patent/CN214101197U/en active Active
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