CN217956939U

CN217956939U - Compact frequency converter

Info

Publication number: CN217956939U
Application number: CN202221535266.2U
Authority: CN
Inventors: 凌冠达; 卢雪明; 欧阳家淦; 李鑫; 伍艳; 廖德贵; 吴晓聪; 黄英球
Original assignee: Guangzhou Sanjing Electric Co Ltd
Current assignee: Guangzhou Sanjing Electric Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-12-02
Anticipated expiration: 2032-06-17

Abstract

The utility model discloses a compact frequency converter, which comprises a shell, wherein the shell is a tubular aluminum alloy part, and a mounting table and a limiting strip are arranged inside the shell; the two sealing covers are respectively arranged at two ends of the shell; the electronic control assembly comprises a bottom plate, a circuit board and a limiting plate, wherein one side of the bottom plate is connected with the mounting table, and the other side of the bottom plate is connected with the circuit board; the limiting plate is fixedly connected with the bottom plate, and a groove which can be matched with the limiting strip is formed in the limiting plate; and the metal column penetrates through the sealing cover and is fixedly connected with the sealing cover, one end of the metal column is electrically connected with the circuit board, and the other end of the metal column is used for being electrically connected with external power equipment. The electric control component is packaged by the sealing cover of the shell, so that the electric control component can adapt to underwater and working environment with short space; and the heat generated by the electric control assembly is transmitted out through the aluminum alloy shell, so that the heat dissipation effect on the electric control assembly is realized. The utility model relates to a converter technical field.

Description

Compact frequency converter

Technical Field

The utility model relates to a compact converter among the converter technical field.

Background

The frequency converter is a power control device commonly used in mechanical equipment and comprises a rectification unit (converting alternating current into direct current), a filtering unit, an inversion unit (converting direct current into alternating current), a braking unit, a driving unit, a detection unit and a microprocessing unit. The frequency converter adjusts the voltage and frequency of an output power supply by switching on and off an internal IGBT, and provides the required power supply voltage according to the actual requirement of the motor, thereby achieving the purposes of energy conservation and speed regulation.

Because the frequency converter needs frequent power conversion and has large heat productivity, corresponding heat dissipation equipment is generally required to be configured, the working space of the frequency converter is also required, enough space is required to dissipate heat, and ventilation is performed to take away the heat generated by the frequency converter through air flow.

However, for some frequency converters working underwater and having high requirements on assembly space, sufficient space cannot be provided to promote heat dissipation, and ventilation cannot be achieved. Therefore, in a closed and narrow space, the inverter may be damaged by rapid temperature rise. Therefore, there is a need for a frequency converter structure that can work normally in a closed and tight space working environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a compact converter, can work in narrow and small and inclosed space.

According to the embodiment of the utility model provides a compact converter is provided, include:

the shell is a tubular aluminum alloy part, and a mounting table and a limiting strip are arranged inside the shell;

the two sealing covers are respectively arranged at two ends of the shell;

the electronic control assembly comprises a bottom plate, a circuit board and a limiting plate, wherein one side of the bottom plate is connected with the mounting table, and the other side of the bottom plate is connected with the circuit board; the limiting plate is fixedly connected with the bottom plate, and a groove which can be matched with the limiting strip is formed in the limiting plate;

and the metal column penetrates through the sealing cover and is fixedly connected with the sealing cover, one end of the metal column is electrically connected with the circuit board, and the other end of the metal column is used for being electrically connected with external power equipment.

According to the utility model discloses the embodiment, furtherly, the closing cap is the working of plastics for play insulating effect.

According to the utility model discloses the embodiment, furtherly, the casing is the pipe form.

According to the embodiment of the utility model provides a, furtherly, the closing cap is cylindric, the closing cap with casing threaded connection.

According to the utility model discloses, furtherly, be equipped with the internal thread on the casing, the closing cap side is equipped with the external screw thread, the internal thread with external screw thread looks adaptation.

According to the embodiment of the utility model provides a, furtherly, closing cap central authorities are equipped with square counter bore, square counter bore be used for with assembly tool looks adaptation.

According to the utility model discloses, furtherly, the both ends of metal column all are equipped with binding post, binding post passes through the bolt fastening and is in the tip of metal column, the last spacing clamp that is used for fixed electric wire that is equipped with of binding post.

According to the embodiment of the utility model provides a, furtherly, the limiting plate with the inside shape looks adaptation of casing, the side of limiting plate can with the inner wall subsides of casing connect.

According to the utility model discloses, furtherly, automatically controlled subassembly still includes electric capacity, electric capacity fixed mounting be in on the limiting plate and with the circuit board electricity is connected.

According to the utility model discloses, furtherly, compact converter still includes the screw, be equipped with the mounting hole on the casing, the screw passes the mounting hole and with bottom plate threaded connection.

The utility model discloses beneficial effect includes at least: the electric control component is packaged by the sealing cover of the shell, so that the electric control component can adapt to underwater and working environment with short space; and the heat generated by the electric control assembly is transmitted out through the aluminum alloy shell, so that the heat dissipation effect on the electric control assembly is realized.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Figure 1 is a cross-sectional view of an embodiment of the invention;

FIG. 2 is a three-dimensional view of the embodiment of the present invention with the housing removed;

fig. 3 is a three-dimensional view of the bottom view of the housing in an embodiment of the present invention;

fig. 4 is a three-dimensional view of a top view of a housing in an embodiment of the invention;

fig. 5 is a structural diagram of a closure in an embodiment of the invention.

Reference numerals: 100-shell, 110-mounting table, 120-limiting strip, 130-internal thread, 140-mounting hole, 200-sealing cover, 210-external thread, 220-square counter bore, 300-electric control component, 310-bottom plate, 320-circuit board, 330-limiting plate, 331-groove, 340-capacitor, 400-metal column, 410-wiring terminal, 411-limiting clamp and 500-screw.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The embodiment of the utility model provides a compact converter, it forms an airtight space through casing and closing cap and is used for loading automatically controlled subassembly to this compact converter can adapt to under water or have the operational environment who requires to the gas tightness. Meanwhile, in order to reduce the occupied space of the compact frequency converter as much as possible, the inner space of the shell is compact. In order to meet the heat dissipation requirement of the electric control assembly, the shell is made of an aluminum alloy material and has good heat dissipation performance, so that heat generated by the electric control assembly can be transferred to the outside as soon as possible, and the high-temperature failure of the electric control assembly caused by heat accumulation in the shell is reduced.

Description figure 1 shows a cross-sectional view of the compact frequency converter. The casing 100 has a tubular shape, and both ends of the casing are provided with openings to which the caps 200 are coupled to seal the inner space of the casing 100. Specifically, the opening of the housing 100 is provided with an internal thread 130, the side surface of the cover 200 is provided with an external thread 210, and the internal thread 130 is matched with the external thread 210, so that the cover 200 can be in threaded connection with the housing 100.

The electronic control assembly 300 is a device for realizing power conversion, and includes a base plate 310, a circuit board 320, a limiting plate 330, and a capacitor 340. The bottom plate 310 is connected to the housing 100 by a screw 500, and specifically, the housing 100 is provided with a mounting hole 140, and the screw 500 passes through the mounting hole 140 and is screwed with the bottom plate 310. The circuit board 320 is mounted on the base plate 310, and electronic components such as IGBTs are provided thereon. One side of the limiting plate 330 is connected to the bottom plate 310, and the other side is connected to the capacitor 340, and the capacitor can be electrically connected to the circuit board 320. The stopper plate 330 functions to restrict the movement of the electronic control assembly 300 within the housing 100.

The metal posts 400 are used to electrically connect the electronic control assembly 300 with external power equipment. Specifically, the metal pillar 400 is a copper pillar, which penetrates through the cap 200 and is fixedly connected to the cap 200. Fixing bolts are provided at both ends of the metal post 400 for being screwed and fixed with the C-shaped metal pieces at the ends of the electric wires. In addition, in order to further fix the electric wire, the end of the metal column 400 is further provided with a terminal 410, and the end of the terminal is provided with a tubular stopper 411 for being sleeved outside the electric wire to limit the movement of the electric wire.

Description of the drawings fig. 2 shows a block diagram of the compact frequency converter with the casing 100 removed. The limiting plate 330 is provided with a groove 331, the shape of the limiting plate 330 is matched with the inner shape of the casing 100, and the limiting plate 330 can be attached to the inner wall of the casing 100 during assembly, so as to limit the movement of the electronic control assembly 300.

Description fig. 3 shows a three-dimensional view of the housing 100 from a bottom perspective. The housing 100 has a semi-cylindrical shape with a position-limiting strip 120, which is adapted to the groove 331 of the position-limiting plate 330.

Description figure 4 shows a three-dimensional view of the top view of the housing 100. The mounting platform 110 is disposed in the casing 100, and the surface of the mounting platform is a plane, so that the mounting platform can be attached to the bottom plate 310, and the contact area between the mounting platform and the bottom plate 310 is increased, so that the connection between the mounting platform and the bottom plate is more stable.

Description figure 5 shows a block diagram of the closure 200. The side of the sealing cap 200 is provided with an external thread 210, and the sealing cap 200 is provided with a square counter bore 220, which is adapted to an assembling tool and drives the sealing cap 200 to rotate by taking the square counter bore 220 as a stress structure. In the present application, the assembling tool refers to an auxiliary screwing tool such as a square wrench, a hexagonal wrench, or the like.

Referring to fig. 1, the compact frequency converter in the embodiment of the present invention includes a housing 100, two covers 200, an electronic control component 300, and a metal column 400, where the housing 100 is a structural component of the compact frequency converter and is used for protecting the electronic control component 300 disposed inside. Moreover, in order to make the casing 100 suitable for underwater high-pressure environment and have a certain heat dissipation capability, the casing 100 is a circular tubular aluminum alloy member. The round tubular structure makes the shell 100 not easy to generate concave deformation when bearing high pressure, and the aluminum alloy material has good heat conductivity, so that heat accumulated in the shell 100 can be transferred as soon as possible, and the heat dissipation effect on the inner space of the shell 100 is achieved.

The two covers 200 are respectively installed at two ends of the housing 100 in a one-to-one correspondence manner, and can seal the internal space of the housing 100, so as to realize the sealing protection of the internal electronic control assembly 300. Specifically, the housing 100 is provided with an internal thread 130, the cap 200 is cylindrical and has an external thread 210 on a side surface thereof, and the internal thread 130 is adapted to the external thread 210, so that the cap 200 can be screwed to the housing 100.

The electronic control assembly 300 includes a base plate 310, a circuit board 320, and a limit plate 330, wherein the circuit board 320 and the limit plate 330 are both mounted on the base plate 310, and the base plate 310 is a component connected to the housing 100, and is attached to and mounted to a mounting table 110 (see fig. 4) on the housing 100. In some embodiments, the base plate 310 is bonded to the mounting plate 110 to provide a stable connection. In the present embodiment, the base plate 310 is coupled to the mounting table 110 by screws 500. Specifically, the side of the housing 100 is provided with a mounting hole 140 penetrating to the surface of the mounting table 110. During installation, the screws 500 extend through the mounting holes 140 and are threadedly coupled to the base plate 310 on the mounting block 110. The mode that adopts threaded connection has stronger joint strength, also makes things convenient for the later stage dismouting moreover.

The circuit board 320 is provided with electronic components for power conversion, such as IGBTs, for frequency conversion. Referring to fig. 2, the limiting plate 330 is provided with a groove 331 adapted to the limiting bar 120 (see fig. 3) inside the casing 100, so that when the electronic control assembly is installed, the limiting bar 120 can guide and guide the assembly, and after the electronic control assembly 300 can be prevented from moving freely due to the mutual limitation of the groove 331 and the limiting bar 120.

The metal posts 400 are penetratingly mounted on the cap 200 for electrically connecting both sides of the cap 200. The metal pillar 400 is a copper pillar having good electrical conductivity, and has one end electrically connected to the circuit board 320 and the other end electrically connected to an external power device.

Further, the sealing cover 200 is a plastic part, and other insulating composite materials can be adopted, so that an insulating effect is achieved.

Further, referring to fig. 5, the center of the cap 200 is provided with a square counterbore 220, the square counterbore 220 being adapted to fit an assembly tool, such that the assembly tool can screw the cap 200 with the square counterbore 220 as a point of effort. It will be readily appreciated that the square counterbore 220 may be replaced by other prismatic holes and will not be described in detail herein.

Further, both ends of the metal post 400 are provided with connection terminals 410, which are fixed to the ends of the metal post 400 by bolts. The wiring terminal 410 is provided with a limiting clamp 411 for fixing the wire, the limiting clamp 411 is in a circular tube shape, the wire can penetrate through the limiting clamp 411 and is attached to the inner wall of the limiting clamp 411, and therefore the position of the wire can be limited, and the wire is prevented from being loosened due to random swinging.

Further, the shape of the limiting plate 330 is matched with the internal shape of the casing 100, so that after the electronic control assembly 300 is installed in the casing 100, the side surface of the limiting plate 330 can be attached to the inner wall of the casing 100, the movement of the electronic control assembly 300 is further restricted, and the limiting plate 330 can also partially support the casing 100.

Further, the electronic control assembly 300 further includes a capacitor 340 fixedly mounted on the limiting plate 330 and electrically connected to the circuit board 320.

Next, the assembly process of the compact frequency converter is described:

s1, assembling a circuit board 320, a limiting plate 330 and a capacitor 340 on a bottom plate 310 to complete the assembly of the electric control assembly 300;

s2, clamping the groove 331 on the limiting plate 330 with the limiting strip 120 on the shell 100, and sliding the electric control assembly 300 into the shell 100;

s3, penetrating the screw 500 through the mounting hole 140 and then being in threaded connection with the bottom plate 310 and screwed tightly;

s4, electrically connecting the metal column 400 and the circuit board 320 through an electric wire;

s5, screwing the two sealing covers 200 to two ends of the shell 100 respectively and screwing the two sealing covers tightly;

s6, pouring sealant on the mounting hole 140 and the sealing cover 200 to improve the sealing performance;

and S7, after the sealant is solidified, the installation is completed.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A compact frequency converter, comprising:

the two sealing covers are respectively arranged at two ends of the shell;

2. The compact frequency converter according to claim 1, characterized in that: the sealing cover is a plastic piece and is used for playing an insulating role.

3. The compact frequency converter according to claim 1, characterized in that: the shell is in a circular tube shape.

4. The compact frequency converter according to claim 3, characterized in that: the sealing cover is cylindrical and is in threaded connection with the shell.

5. The compact frequency converter according to claim 4, characterized in that: the shell is provided with an internal thread, the side face of the sealing cover is provided with an external thread, and the internal thread is matched with the external thread.

6. The compact frequency converter of claim 5, wherein: the center of the sealing cover is provided with a square counter bore which is used for being matched with an assembling tool.

7. The compact frequency converter according to claim 1, characterized in that: the both ends of metal post all are equipped with binding post, binding post passes through the bolt fastening the tip of metal post, binding post is last to be equipped with the spacing clamp that is used for fixed electric wire.

8. The compact frequency converter according to claim 1, characterized in that: the limiting plate is matched with the inner shape of the shell, and the side face of the limiting plate can be attached to the inner wall of the shell.

9. The compact frequency converter according to claim 1, characterized in that: the electric control assembly further comprises a capacitor, and the capacitor is fixedly mounted on the limiting plate and electrically connected with the circuit board.

10. The compact frequency converter according to claim 1, characterized in that: the compact frequency converter further comprises a screw, a mounting hole is formed in the shell, and the screw penetrates through the mounting hole and is in threaded connection with the bottom plate.