CN217820551U - Anti-interference frequency converter data acquisition device - Google Patents

Abstract

The utility model discloses an anti-interference frequency converter data acquisition device, which comprises a shielding box, a shielding cover, a mounting frame, a cable pipe, a filter layer and a connecting strip, the upper end of the shielding box is sleeved with a shielding cover, and the shielding Both the box and the shielding cover are composed of a shell, a filter layer and a shielding layer. The outer walls of both ends of the shielding box are embedded with cable tubes distributed equidistantly, and the inner walls of the cable tubes are provided with shrapnel distributed in a circular array. , the inner wall of the bottom end of the shielding box is bonded with an insulating layer, the upper surface of the insulating layer is provided with a mounting bracket and a terminal block, the outer wall of the upper end of the shielding box and the outer wall of the bottom end of the shielding case are provided with connecting strips, and the connecting strips Evenly distributed first bolts are plugged on the surface, and copper sheets are sleeved on the outer wall of the first bolts. The utility model can place the Hall sensor used for collecting data by the frequency converter on the installation frame, and the shielding box and the shielding cover can fully and effectively shield the Hall sensor, thereby achieving better anti-interference effect.

Description

An Anti-interference Frequency Converter Data Acquisition Device

technical field

The utility model relates to the technical field of frequency converter applications, in particular to an anti-interference frequency converter data acquisition device.

Background technique

The frequency converter is a power control device that uses the on-off function of power semiconductor devices to convert the power frequency power supply into another frequency. It can realize the soft start of the asynchronous motor of the AC inverter, frequency conversion speed regulation, improve operation accuracy, change power factor, Overcurrent/overvoltage/overload protection and other functions. When the frequency converter is collecting data, most of them use the Hall sensor to measure the voltage and current. However, when it is applied to the data detection of the motor, the magnetic field will be generated due to the operation of the motor, and the pulse generated by the frequency converter will affect the Hall sensor. The use of the sensor has an impact, therefore, it is necessary to take anti-interference measures for the working environment of the Hall sensor.

Most of the existing electromagnetic shielding methods adopt the wrapping type, which is used to resist interference to precision electronic instruments. However, in the actual use process, the single wrapping type anti-interference effect can only play a part of the anti-interference effect. However, there is a lack of an effective anti-jamming measure for the Hall sensor.

Utility model content

The purpose of this utility model is to provide an anti-interference frequency converter data acquisition device to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the utility model provides the following technical solutions: an anti-interference frequency converter data acquisition device, including a shielding box, a shielding cover, a mounting frame, a cable tube, a filter layer and a connecting strip, and the upper end of the shielding box is covered A shielding cover is connected, and the shielding box and the shielding cover are both composed of a shell, a filter layer and a shielding layer. The filter layer is located between the shell and the shielding layer. The cable tube, the inner wall of the cable tube is provided with shrapnel distributed in a circular array, the inner wall of the bottom end of the shielding box is attached with an insulating layer, and the upper surface of the insulating layer is provided with a mounting frame and a terminal block. Both the outer wall of the upper end of the shielding box and the outer wall of the bottom end of the shielding case are provided with connecting strips, and evenly distributed first bolts are inserted on the surface of the connecting strips, and the outer walls of the first bolts are socketed with copper sheets.

Preferably, the terminal row is located on both sides of the installation frame, and the terminal row corresponds to the displacement of the cable tube.

Preferably, the shielding layer is located on the inner wall of the shielding box and the shielding case, and uniformly distributed through holes are arranged inside the filtering layer.

Preferably, the copper sheet is connected with a ground wire.

Preferably, the outer wall of the upper end of the shielding box and the inner wall of the lower end of the shielding case are both provided with fitting grooves for fitting.

Preferably, symmetrically distributed second bolts are rotatably inserted into the outer wall of the end of the cable conduit away from the shielding box.

Compared with the prior art, the beneficial effect of the utility model is that the utility model can position the Hall sensor used for data collection by the frequency converter on the installation frame, and the connecting lines between the motor, the frequency converter and the Hall sensor can pass through the row The wire tube and the terminal block are connected, and the combination of the shielding box and the shielding cover is used to isolate the environment where the Hall sensor is located from the external environment, and cooperate with the shell, filter layer and shielding layer to eliminate external electromagnetic interference and pulse interference respectively, effectively It solves the problem of the deviation of the measurement data of the Hall sensor in the electromagnetic interference environment, and ensures the effectiveness of the data collection of the frequency converter; at the same time, the shrapnel can be used to squeeze the line in the cable tube to realize the positioning of the line, and cooperate with the second The screwing in of the bolts can reduce the distance between the shrapnels and further improve the stability of the lines in the cable tube.

Description of drawings

Fig. 1 is the main sectional structure schematic diagram of the utility model;

Fig. 2 is a partial cross-sectional structural schematic diagram of the shielding box and the shielding cover of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of the cable conduit of the present invention.

In the figure: 1. Shielding box; 2. Shielding cover; 3. Insulation layer; 4. Mounting frame; 5. Terminal block; 6. Grounding wire; 7. Cable tube; 8. Shell; 9. Filter layer; Shielding layer; 11, first bolt; 12, copper sheet; 13, connecting strip; 14, fitting groove; 15, through hole; 16, shrapnel; 17, second bolt.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "another end" The orientation or positional relationship indicated by ", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, so as to Specific orientation configurations and operations, therefore, should not be construed as limitations on the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless otherwise specified and limited, the terms "installed", "set with", "connected", etc. should be understood in a broad sense, such as "connected", which can be a fixed The connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Please refer to Figure 1 to Figure 3, an embodiment provided by the utility model: an anti-interference frequency converter data acquisition device, including a shielding box 1, a shielding cover 2, a mounting frame 4, a cable pipe 7, and a filter layer 9 and the connecting strip 13, the upper end of the shielding box 1 is sleeved with a shielding cover 2, the outer wall of the upper end of the shielding box 1 and the inner wall of the lower end of the shielding cover 2 are provided with fitting grooves 14 for fitting, and the shielding box 1 and the shielding cover 2 are formed by the shell 8 , a filtering layer 9 and a shielding layer 10, the filtering layer 9 is located between the shell 8 and the shielding layer 10, the shielding layer 10 is located on the inner wall of the shielding box 1 and the shielding cover 2, and the inside of the filtering layer 9 is provided with evenly distributed through holes 15, the shielding The outer walls of both ends of the box 1 are embedded with cable tubes 7 distributed equidistantly. The inner walls of the cable tubes 7 are provided with shrapnel 16 distributed in a circular array. The outer walls of the cable tube 7 are away from the shielding box 1. With the distributed second bolts 17, the staff can position the Hall sensor used by the frequency converter to collect data on the installation frame 4, and connect the connection lines between the motor, the frequency converter and the Hall sensor through the cable tube 7 and the terminal block. 5 for connection, the line can be squeezed through the shrapnel 16 in the cable tube 7 to realize the positioning of the line, and with the screwing of the second bolt 17, the distance between the shrapnel 16 can be reduced, further improving the connection between the line and the line in the cable tube 7. in the stability.

The inner wall of the bottom end of the shielding box 1 is bonded with an insulating layer 3, and the upper surface of the insulating layer 3 is provided with a mounting frame 4 and a terminal block 5. The terminal block 5 is located on both sides of the mounting frame 4, and the displacement of the terminal block 5 corresponds to the displacement of the cable tube 7. , the outer wall of the upper end of the shielding box 1 and the outer wall of the bottom end of the shielding case 2 are provided with connecting strips 13, the surface of the connecting strip 13 is plugged with evenly distributed first bolts 11, and the outer walls of the first bolts 11 are sleeved with copper sheets 12, copper sheets 12 Connected with the grounding wire 6, after the Hall sensor is connected, combine the shielding box 1 with the shielding cover 2 to isolate the environment where the Hall sensor is located from the external environment, cooperate with the shell 8, the filter layer 9 and the shielding layer 10 to separate the external environment Electromagnetic interference and pulse interference are eliminated, and the shell 8 can be grounded through the grounding wire 6 through the conduction between the connecting strip 13 and the copper sheet 12. The filter layer 9 contains through holes 15, which can disperse the pulse and reduce the pulse The interference caused by the signal to the Hall sensor, and the shielding layer 10 has the effect of improving the electromagnetic shielding, effectively solving the problem of the deviation of the measurement data of the Hall sensor in the electromagnetic interference environment, and ensuring the effectiveness of the data acquisition of the frequency converter .

Working principle: The staff can position the Hall sensor used by the frequency converter to collect data on the installation frame 4, and connect the connection lines between the motor, the frequency converter and the Hall sensor through the cable tube 7 and the terminal block 5, The line can be squeezed by the shrapnel 16 in the cable tube 7 to realize the positioning of the line. Cooperating with the screwing of the second bolt 17, the distance between the shrapnel 16 can be reduced, and the stability of the line in the cable tube 7 can be further improved. .

After the connection of the Hall sensor is completed, the shielding box 1 and the shielding cover 2 are combined to isolate the environment where the Hall sensor is located from the external environment, and cooperate with the shell 8, the filter layer 9 and the shielding layer 10 to separate the external electromagnetic interference and pulse interference. Elimination, the shell 8 can be grounded through the ground wire 6 through the conduction between the connecting strip 13 and the copper sheet 12, and the filter layer 9 contains through holes 15, which can disperse the pulse and reduce the impact of the pulse signal on the Hall sensor. interference, and the shielding layer 10 has the effect of improving the electromagnetic shielding performance, effectively solving the problem of deviation of the measurement data of the Hall sensor in the electromagnetic interference environment, and ensuring the effectiveness of the data collection of the frequency converter.

It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from all points of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to fall within the scope of the claims All changes within the meaning and range of equivalents of the required elements are included in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides an anti-interference converter data acquisition device, includes shielding box (1), shield cover (2), mounting bracket (4), winding displacement pipe (7), filtering layer (9) and connecting strip (13), its characterized in that: shield box (1) upper end has cup jointed shield cover (2), shield box (1) and shield cover (2) constitute by shell (8), filtering layer (9) and shielding layer (10), filtering layer (9) are located between shell (8) and shielding layer (10), the winding displacement pipe (7) that the equidistance distributes are all installed in the equal embedding of shield box (1) both ends outer wall, winding displacement pipe (7) inner wall all is provided with shell fragment (16) that are circular array and distribute, shield box (1) bottom inner wall laminating has insulating layer (3), insulating layer (3) upper surface is provided with mounting bracket (4) and terminal row (5), shield box (1) upper end outer wall all is provided with connecting strip (13) with shield cover (2) bottom outer wall, connecting strip (13) surface grafting has evenly distributed's first bolt (11), first bolt (11) outer wall has cup jointed copper sheet (12).

2. The interference free frequency converter data acquisition device of claim 1 further comprising: the terminal strip (5) is positioned on two sides of the mounting frame (4), and the terminal strip (5) corresponds to the displacement of the flat cable tube (7).

3. The apparatus of claim 1, wherein the data acquisition unit comprises: the shielding layer (10) is located the inner walls of the shielding box (1) and the shielding cover (2), and through holes (15) which are uniformly distributed are formed in the filtering layer (9).

4. The interference free frequency converter data acquisition device of claim 1 further comprising: the copper sheet (12) is connected with a grounding wire (6).

5. The interference free frequency converter data acquisition device of claim 1 further comprising: the outer wall of the upper end of the shielding box (1) and the inner wall of the lower end of the shielding cover (2) are both provided with embedded grooves (14) which are embedded with each other.

6. The interference free frequency converter data acquisition device of claim 1 further comprising: and the wire arranging pipe (7) deviates from the outer wall of one end of the shielding box (1) and is rotationally inserted with symmetrically distributed second bolts (17).

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