Device for eliminating induced electricity of frequency converter

Abstract

The utility model provides a device for eliminating induced electricity of a frequency converter, and belongs to the technical field of induced electricity elimination. The technical problems that in the prior art, capacitance generated due to the fact that a cable is too long possibly interferes normal work of the frequency converter, current fluctuation and voltage instability of the frequency converter are easily caused, and equipment control fails are solved. Comprising a bottom plate, an insulation cavity is arranged on the bottom plate, a frequency converter body is fixed in the insulation cavity, filters are respectively fixed on two sides of the insulation cavity, and the two filters are respectively connected with an input end and an output end of the frequency converter body; a protective cover is rotationally connected to the bottom plate, a protective cavity is formed between the protective cover and the bottom plate, and the insulating cavity and the filter are both located in the protective cavity; a near-earth control switch and a remote control switch are also arranged on the bottom plate on the outer side of the protective cover; the near-earth control switch and the remote control switch are respectively connected with the equipment through cables; the device is applied to frequency converter induced electricity elimination.

Description

Technical Field

[0001] The utility model provides a device for eliminating induced electricity of a frequency converter, belonging to the technical field of eliminating induced electricity. Background Art

[0002] In the process of various industrial production and automation equipment operation, in order to achieve accurate and stable control of the start and stop of the equipment, so as to realize efficient and accurate production operation, the frequency converter is needed. The frequency converter is an advanced power control device that integrates frequency conversion technology and microelectronics technology. It controls the AC motor by changing the frequency of the motor's working power supply. When the frequency converter is connected to the equipment, capacitance will be generated between the cables. When the cable is short, the capacitance can be ignored; however, as the cable length increases, the capacitance generated will also increase significantly. Excessive capacitance may interfere with the normal operation of the frequency converter, making it difficult to accurately control the equipment, and will also cause current fluctuations and voltage instability, thereby affecting the performance of the frequency converter. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a device for eliminating induced electricity of the inverter, so as to solve the technical problem in the prior art that the capacitance generated by the excessively long cable may interfere with the normal operation of the inverter, easily lead to current fluctuations and voltage instability of the inverter, and cause failure of equipment control.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a device for eliminating the induction electricity of the inverter, comprising a bottom plate, an insulating cavity is arranged on the bottom plate, a inverter body is fixed in the insulating cavity, filters are fixed on both sides of the insulating cavity, and the two filters are respectively connected to the input end and the output end of the inverter body;

[0005] A protective cover is rotatably connected to the bottom plate, a protective cavity is formed between the protective cover and the bottom plate, and the insulating cavity and the filter are both located in the protective cavity;

[0006] A ground control switch and a remote control switch are also arranged on the bottom plate outside the protective cover, and the ground control switch and the remote control switch are respectively connected to the equipment through cables.

[0007] The insulating cavity comprises an insulating shell and an insulating cover plate. The insulating shell is fixed on the bottom plate, and the insulating cover plate is detachably fixed on the opening surface of the insulating shell.

[0008] The insulating cover plate is provided with a connecting buckle, the insulating shell is provided with a connecting groove, and the connecting buckle is clamped in the connecting groove.

[0009] The insulating shell is provided with a through slot, and the through slot is used for passing a connecting wire, and the connecting wire is used for connecting the inverter body and the filter.

[0010] The bottom plate is provided with a plurality of groups of positioning posts, and positioning holes are opened at both ends of the filter, and the positioning posts are inserted into the positioning holes.

[0011] Two groups of fixing plates are arranged on the bottom plate, the fixing plates are connected to the bottom plate by screws, and the filter is located between the fixing plates and the bottom plate.

[0012] The protection cavity is also provided with a static eliminator, which is connected to the bottom plate via screws and is electrically connected to the power supply.

[0013] The protective cover is rotatably connected to the bottom plate via a hinge structure.

[0014] The bottom plate is provided with a locking block, the protective cover is provided with a locking plate, the locking block and the locking plate are both provided with locking holes, the locking bolt is passed through the locking hole, and the protective cover and the bottom plate can be opened and connected.

[0015] Two groups of mounting seats are arranged on the bottom plate, and the near-ground control switch and the remote control switch are respectively clamped in the two mounting seats and fixedly connected by screws.

[0016] The beneficial effects of the utility model compared with the prior art are:

[0017] 1. The device is provided with an insulating shell and an insulating cover on the bottom plate. The insulating cover and the insulating shell are detachably connected to form an insulating cavity, in which the inverter body is placed, effectively isolating the external interference, avoiding the influence of the capacitance generated by the excessive cable length on the normal operation of the inverter, and the current fluctuation is greatly suppressed. The stability of the voltage is reliably guaranteed, thereby ensuring the accuracy and stability of the equipment control, improving the reliability of the entire system, ensuring the accuracy and stability of the equipment control, and providing a solid foundation for the long-term stable operation of the equipment.

[0018] 2. Filters are set on both sides of the insulating shell, which are connected to the output and input ends of the inverter body through connecting wires, which can further eliminate the induced electricity and various electromagnetic interference caused by the long cable length, effectively filter out clutter and interference signals, and ensure the purity and stability of the signal. It also provides great convenience for the control operation of the equipment, allowing operators to control the operating status of the equipment more accurately, improve work efficiency and operation accuracy, and provide reliable guarantee for the stable operation and efficient operation of the entire system. An electrostatic eliminator is also installed on the bottom plate to enhance the protection of the inverter body and filter, prevent failures caused by external factors, and the use of the electrostatic eliminator helps to maintain a good operating environment for the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model after assembly;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model after being disassembled;

[0022] Figure 3 It is a schematic diagram of the expanded structure of the utility model;

[0023] Figure 4 yes Figure 2 A partial enlarged view of area a in the middle;

[0024] In the figure, 11, bottom plate; 12, insulating shell; 13, connecting groove; 14, through groove; 15, positioning column; 16, mounting seat; 21, inverter body; 22, filter; 23, near-ground control switch; 24, remote control switch; 25, static eliminator; 31, insulating cover; 32, connecting buckle; 33, positioning hole; 34, fixing plate; 35, protective cover; 36, locking block; 37, locking plate; 38, locking hole; 39, locking bolt. DETAILED DESCRIPTION

[0025] like Figures 1 to 4 As shown, the utility model provides a device for eliminating the induced electricity of the frequency converter, including a base plate 11 as the basic support of the whole device, and an insulating shell 12 is arranged on the base plate 11, and the insulating shell 12 provides reliable insulation protection for the whole device. The opening surface of the insulating shell 12 is equipped with an insulating cover plate 31, and the insulating cover plate 31 is tightly connected with the insulating shell, and an insulating cavity is formed inside the insulating shell 12. The frequency converter body 21 is installed in the insulating cavity and is fully protected from external interference. Filters 22 are also arranged on both sides of the insulating shell 12, and these filters 22 are tightly connected with the frequency converter body 21. The frequency converter body 21 is connected to the two groups of filters 22 through connecting lines, which not only ensures the stability of signal transmission, but also further eliminates the induced electricity and various electromagnetic interferences that may be generated due to the excessive length of the cable. The filter 22 can effectively filter out clutter and interference signals, keep the signal pure and stable, and provide a basis for the control of the equipment. On one side of the base plate 11, a near-ground control switch 23 and a remote control switch 24 are also arranged. The near-ground control switch 23 facilitates the operator to directly operate the device near the device, while the remote control switch 24 allows the operator to control the device from a certain distance, increasing the flexibility of operation. The two switches are connected to the device through cables to ensure accurate transmission of control signals.

[0026] like Figure 2 and 4 As shown, two groups of connecting buckles 32 are arranged on the insulating cover plate 31, and connecting grooves 13 are arranged on the insulating shell 12 at positions corresponding to the connecting buckles 32. When the insulating cover plate 31 needs to be installed, the connecting buckles 32 only need to be accurately inserted into the connecting grooves 13 to achieve a tight connection between the insulating cover plate 31 and the insulating shell 12. This detachable connection method not only facilitates maintenance and repair, but also ensures the stability and reliability of the connection. At the same time, through grooves 14 are also provided on both sides of the insulating shell 12, allowing the connecting wire to pass smoothly. One end of the connecting wire is connected to the inverter body 21, and the other end is connected to the filter 22. Through these through grooves 14, the connecting wire can pass through the inside of the insulating shell 12, which not only ensures the transmission of the signal, but also avoids the interference of external factors on the connecting wire.

[0027] A plurality of groups of positioning posts 15 are also provided on the base plate 11 to provide positioning for the installation of the filter 22. Positioning holes 33 are correspondingly provided at both ends of the filter 22. When the filter 22 needs to be installed, the positioning posts 15 only need to be accurately inserted into the positioning holes 33 to achieve the stable installation of the filter 22 on the base plate 11. This not only ensures the installation accuracy of the filter 22, but also improves the efficiency of the installation. Two groups of fixing plates 34 are also provided on one side of the base plate 11. The fixing plates 34 are firmly connected to the base plate 11 by screws to form a stable structure. The filter 22 is located between the fixing plates 34 and the base plate 11 and is tightly fixed in the middle. This not only further enhances the stability of the filter 22, but also effectively prevents the filter 22 from shaking or displacing during operation, providing a reliable guarantee for the stable operation of the entire device.

[0028] like Figure 2 and 3 As shown, a protective cover 35 is provided on one side of the base plate 11, and a rotatable connection is achieved between the protective cover 35 and the base plate 11 through a hinge structure, so that the protective cover 35 can be flexibly opened and closed. When the protective cover 35 is closed, it forms a protective cavity together with the base plate 11, which completely wraps the inverter body 21 and the filter 22 therein, providing them with all-round protection. In this protective cavity, an electrostatic eliminator 25 is also provided. The electrostatic eliminator 25 is firmly connected to the base plate 11 by screws, ensuring its stability during operation. At the same time, the electrostatic eliminator 25 is electrically connected to the power supply, which can timely and effectively eliminate the static electricity in the protective cavity, and prevent static electricity from interfering with and damaging the inverter body 21 and the filter 22.

[0029] A locking block 36 is also provided on the bottom plate 11, and a locking plate 37 is provided on the protective cover 35. Locking holes 38 are provided on the locking block 36 and the locking plate 37. When the protective cover 35 needs to be fixedly connected to the bottom plate 11, the locking bolts 39 only need to be inserted into the locking holes 38, and the locking bolts 39 are tightened to achieve a tight connection between the protective cover 35 and the bottom plate 11, thereby ensuring the safety and reliability of the equipment in the protective cavity. Moreover, this connection method also allows the protective cover 35 and the bottom plate 11 to be easily opened, which is convenient for maintenance and repair of the internal equipment.

[0030] Two sets of mounting seats 16 are also provided on the bottom plate 11, and the near-ground control switch 23 and the remote control switch 24 are clamped in the two mounting seats 16 and fixedly connected by screws. This mounting method is both stable and reliable, ensuring that the control switch can accurately perform its function and providing a convenient control method for the operation of the entire device.

[0031] The specific usage and function of the utility model are:

[0032] When in use, first fix the base plate 11 in a suitable position. Then, connect the local control switch 23 or the remote control switch 24 to the device as needed to achieve flexible control of the device. Next, install the filter 22 on the base plate 11 through the positioning column 15 and the positioning hole 33, and fix it with the fixing plate 34 to ensure the stable operation of the filter 22. When it is necessary to maintain or overhaul the inverter body 21 and the filter 22, you can first unscrew the locking bolt 39 and open the protective cover 35. In the protective cavity, the static eliminator 25 can be inspected and maintained, and the necessary operations can also be performed on the inverter body 21 and the filter 22. After the maintenance is completed, close the protective cover 35 and fix it with the locking bolt 39 to ensure the safety of the equipment in the protective cavity. The use process of the entire device is simple and convenient, and it can effectively eliminate induced electricity and electromagnetic interference, providing reliable protection for the stable operation of the equipment.

[0033] Regarding the specific structure of the utility model, it should be explained that the connection relationship between the various component modules adopted in the utility model is definite and feasible. Except for special instructions in the embodiments, the specific connection relationship can bring corresponding technical effects and solve the technical problems raised by the utility model without relying on the execution of corresponding software programs. The components, modules, models of specific components and the connection methods between each other appearing in the utility model, as well as the conventional use methods and expected technical effects brought about by the above-mentioned technical features, except for specific instructions, all belong to the disclosed contents in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by technical personnel in this field before the application date, or belong to the existing technologies such as conventional technologies and common knowledge in this field, and there is no need to elaborate, so that the technical solution provided in this case is clear, complete and feasible, and the corresponding physical products can be reproduced or obtained according to the technical means.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A device for eliminating induced electricity in a frequency converter, characterized in that: It comprises a bottom plate (11), the bottom plate (11) being provided with an insulating cavity, a frequency converter body (21) being fixed in the insulating cavity, filters (22) being fixed on both sides of the insulating cavity, and two filters (22) being connected to an input end and an output end of the frequency converter body (21) respectively; A protective cover (35) is rotatably connected to the bottom plate (11), a protective cavity is formed between the protective cover (35) and the bottom plate (11), and the insulating cavity and the filter (22) are both located in the protective cavity; A ground control switch (23) and a remote control switch (24) are also provided on the bottom plate (11) outside the protective cover (35), and the ground control switch (23) and the remote control switch (24) are respectively connected to the device via cables.

2. The device for eliminating induced electricity of a frequency converter according to claim 1, characterized in that: The insulating cavity comprises an insulating shell (12) and an insulating cover plate (31); the insulating shell (12) is fixed on the bottom plate (11); and the insulating cover plate (31) is detachably fixed on the opening surface of the insulating shell (12).

3. The device for eliminating induced electricity of a frequency converter according to claim 2, characterized in that: The insulating cover plate (31) is provided with a connection buckle (32), the insulating shell (12) is provided with a connection groove (13), and the connection buckle (32) is clamped in the connection groove (13).

4. The device for eliminating induced electricity of a frequency converter according to claim 2, characterized in that: The insulating shell (12) is provided with a through slot (14), the through slot (14) being used for passing a connecting wire, the connecting wire being used for connecting the inverter body (21) and the filter (22).

5. The device for eliminating induced electricity of a frequency converter according to claim 1, characterized in that: A plurality of groups of positioning columns (15) are arranged on the bottom plate (11), positioning holes (33) are provided at both ends of the filter (22), and the positioning columns (15) are inserted into the positioning holes (33).

6. The device for eliminating induced electricity of a frequency converter according to claim 5, characterized in that: Two groups of fixing plates (34) are arranged on the bottom plate (11); the fixing plates (34) are connected to the bottom plate (11) via screws; and the filter (22) is located between the fixing plates (34) and the bottom plate (11).

7. The device for eliminating induced electricity of a frequency converter according to claim 1, characterized in that: A static eliminator (25) is also provided in the protection cavity; the static eliminator (25) is connected to the bottom plate (11) via screws and is electrically connected to a power source.

8. The device for eliminating induced electricity of a frequency converter according to claim 1, characterized in that: The protective cover (35) is rotatably connected to the bottom plate (11) via a hinge structure.

9. The device for eliminating induced electricity of a frequency converter according to claim 8, characterized in that: The bottom plate (11) is provided with a locking block (36), the protective cover (35) is provided with a locking plate (37), the locking block (36) and the locking plate (37) are both provided with locking holes (38), a locking bolt (39) is inserted into the locking hole (38), and the protective cover (35) and the bottom plate (11) are openably connected.

10. The device for eliminating induced electricity of a frequency converter according to claim 1, characterized in that: Two groups of mounting seats (16) are provided on the bottom plate (11), and the near-ground control switch (23) and the remote control switch (24) are respectively clamped in the two mounting seats (16) and fixedly connected by screws.

Images