Degaussing common-mode device

Abstract

The utility model relates to the technical field of degaussing frequency conversion common mode, in particular to a degaussing common mode device. According to the technical scheme, the magnetic ring comprises a plastic shell, an inner magnetic ring body, an outer magnetic ring body, a middle magnetic ring body and a positioning ring, the inner magnetic ring body is arranged in the middle magnetic ring body, the middle magnetic ring body is arranged in the outer magnetic ring body, the inner magnetic ring body, the middle magnetic ring body and the outer magnetic ring body form a combined magnetic ring body, a copper wire is wound on the combined magnetic ring body, and the positioning ring is arranged in the middle magnetic ring body. And a plastic shell is coated outside the combined magnetic ring body. According to the utility model, through cooperation of the structures, resistance stability of each gas making unit is guaranteed, magnetic fields of the units are eliminated, and damage of mode supply current to operation of the units is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of demagnetization frequency conversion common mode, in particular to a demagnetization common mode device. Background Art

[0002] The gas air separation system is an industrial device used to separate oxygen and nitrogen in the air, and is commonly used in industries such as steel, petrochemicals, and electronics. The demagnetization frequency conversion pump is a key device in the gas air separation system, and its function is to compress the air and transport it to the separator.

[0003] However, the demagnetization variable frequency pump will generate common mode current during operation, which will interfere with the equipment itself and surrounding equipment, affecting the stability and reliability of the entire gas air separation unit system.

[0004] To this end, we propose a demagnetization common mode device to solve the existing problems. Utility Model Content

[0005] The utility model aims to provide a demagnetization common mode device in view of the problems existing in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a demagnetization common mode device, comprising a plastic shell, an inner magnetic ring body, an outer magnetic ring body, an intermediate magnetic ring body and a positioning ring, the inner magnetic ring body is arranged in the intermediate magnetic ring body, the intermediate magnetic ring body is arranged in the outer magnetic ring body, the inner magnetic ring body, the intermediate magnetic ring body and the outer magnetic ring body constitute a combined magnetic ring body, copper wire is wound on the combined magnetic ring body, and the outside of the combined magnetic ring body is covered with a plastic shell.

[0007] Preferably, the inner magnetic ring body is made of manganese-zinc ferrite, the middle magnetic ring body is made of manganese-zinc ferrite, and the outer magnetic ring body is made of iron powder;

[0008] The inner magnetic ring body, the middle magnetic ring body and the outer magnetic ring body have the same width.

[0009] Preferably, the inner ring surface of the inner magnetic ring body and the outer ring surface of the outer magnetic ring body are both installed with positioning rings, and the positioning rings are provided with positioning grooves adapted to the copper wire;

[0010] The copper wire is wound on the positioning groove.

[0011] Preferably, the plastic shell is divided into two parts, each of which is equipped with a fixing block, and a screw is inserted between the two fixing blocks;

[0012] Nuts are symmetrically threadedly mounted on both ends of the screw rod, and the nuts are against the surface of the fixing block.

[0013] Preferably, a push rod is installed inside the plastic shell, and the other end of the push rod pushes against the outer ring surface of the positioning ring.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] During use, the demagnetization common mode device of the utility model

[0016] By analyzing the magnetic field of each unit in the system, the maximum magnetic field schematic diagram is calculated with the maximum rated power of each unit. By independently calculating the magnetic field strength range of a single unit, the remaining units are correlated and calculated to analyze the magnetic field influence intensity. In this way, the demagnetization harness is designed according to the unit demand resistance to reduce the overall magnetic field strength and stabilize the supply current trend.

[0017] The frequency conversion pump connection harness is sheathed in three combined magnetic rings to stably reduce or eliminate the common mode current generated by the frequency converter;

[0018] The combined magnet is used as the magnetic core, copper wires are wound around the magnetic core, and the copper wires are isolated by insulating materials, which can reduce the mutual influence between electromagnetic waves and improve the filtering quality. An insulating plastic shell is set on the surface to cover the entire combined magnetic ring;

[0019] The utility model ensures the stability of the resistance of each gas-making unit, eliminates the magnetic field of the unit, and avoids the damage of the supply current to the operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 For the utility model Figure 1 A schematic cross-sectional structure diagram of ;

[0022] Figure 3 For the utility model Figure 2 Schematic diagram of the main structure;

[0023] Figure 4 For the utility model Figure 2 Schematic diagram of the top view structure.

[0024] Reference numerals:

[0025] 1. Plastic shell; 2. Fixing block; 3. Screw; 4. Nut; 5. Inner magnetic ring; 6. Outer magnetic ring; 7. Middle magnetic ring; 8. Copper wire; 9. Positioning ring; 10. Push rod. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] like Figure 1-Figure 4 As shown, a demagnetization common mode device proposed by the utility model includes a plastic shell 1, an inner magnetic ring body 5, an outer magnetic ring body 6, an intermediate magnetic ring body 7 and a positioning ring 9. The inner magnetic ring body 5 is arranged in the intermediate magnetic ring body 7, and the intermediate magnetic ring body 7 is arranged in the outer magnetic ring body 6. The inner magnetic ring body 5, the intermediate magnetic ring body 7 and the outer magnetic ring body 6 constitute a combined magnetic ring body. Copper wire 8 is wound on the combined magnetic ring body, and the outer part of the combined magnetic ring body is covered with a plastic shell 1.

[0029] Based on Example 1:

[0030] Through the operation of each group of the gas-making system, the external magnetic field formed by the inverter motor is studied. Through the logical analysis of the strong magnetic field demagnetization balance of the motor group, the corresponding magnetic field strength is calculated by the logic of each frequency conversion rated power, and the gas-making system operating power and continuity are analyzed. In this way, a magnetic field demonstration diagram for the entire gas-making system is established, and the supply model demagnetization line group is designed for the corresponding unit. In this way, the demagnetization group range is designed according to the operating power of a single unit, and then the influence of the mixed magnetic field of the unit is analyzed. The resistance value of each unit coil group is logically analyzed to ensure the stability of the resistance of each gas-making unit, and at the same time eliminate the unit magnetic field to avoid the damage of the supply model current to the unit operation;

[0031] The common-mode demagnetization technology is designed by collecting the maximum rated power data of the inverter, and measuring the diameter and resistance value of the winding wire group. The rated power current and the wire group are logically calculated to meet the actual resistance demand. A 1MM-2MM spacing is reserved for the lateral spacing of the winding wire group for indented winding to perform common-mode demagnetization and ensure the heat dissipation of the load power magnetic field.

[0032] Embodiment 2

[0033] like Figure 1-Figure 4 As shown, the demagnetization common mode device proposed by the present utility model, compared with the first embodiment, this embodiment also includes:

[0034] The inner magnetic ring body 5 is made of manganese-zinc ferrite, the middle magnetic ring body 7 is made of manganese-zinc ferrite, and the outer magnetic ring body 6 is made of iron powder;

[0035] The above materials are used as the material of the combined magnet, and the size and quantity can be selected according to needs, but the inner, outer and middle magnetic rings must be configured as a set to ensure the reduction or even elimination of the common mode current.

[0036] The inner magnetic ring body 5, the middle magnetic ring body 7 and the outer magnetic ring body 6 have the same width.

[0037] The inner ring surface of the inner magnetic ring body 5 and the outer ring surface of the outer magnetic ring body 6 are both installed with positioning rings 9, and the positioning rings 9 are provided with positioning grooves adapted to the copper wires 8;

[0038] The copper wire 8 is wound on the positioning groove;

[0039] By winding a copper wire 8 around the combined magnet, the copper wire 8 is insulated and blocked by a 0.8 mm thick polyvinyl chloride plastic film to reduce the mutual influence of electromagnetic waves and improve the filtering quality. The coil is stabilized on the magnetic ring by the design of the positioning ring 9.

[0040] The plastic shell 1 is divided into two parts, each of which is equipped with a fixing block 2, and a screw 3 is inserted between the two fixing blocks 2;

[0041] The two ends of the screw rod 3 are symmetrically threaded with nuts 4, which are against the surface of the fixing block 2.

[0042] A push rod 10 is installed inside the plastic shell 1, and the other end of the push rod 10 pushes against the outer ring surface of the positioning ring 9;

[0043] Through the design of the plastic shell 1, the surface is covered with an insulating plastic shell to ensure stable and efficient operation of the variable frequency pump.

[0044] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

[0045] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, 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, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A demagnetizing common mode device, comprising a plastic shell (1), an inner magnetic ring body (5), an outer magnetic ring body (6), an intermediate magnetic ring body (7) and a positioning ring (9), characterized in that: The inner magnetic ring body (5) is arranged inside the middle magnetic ring body (7), and the middle magnetic ring body (7) is arranged inside the outer magnetic ring body (6). The inner magnetic ring body (5), the middle magnetic ring body (7) and the outer magnetic ring body (6) constitute a combined magnetic ring body, a copper wire (8) is wound around the combined magnetic ring body, and a plastic shell (1) is provided on the outside of the combined magnetic ring body.

2. A demagnetization common mode device according to claim 1, characterized in that: The inner magnetic ring body (5) is made of manganese-zinc ferrite, the middle magnetic ring body (7) is made of manganese-zinc ferrite, and the outer magnetic ring body (6) is made of iron powder; The inner magnetic ring body (5), the middle magnetic ring body (7) and the outer magnetic ring body (6) have the same width.

3. A demagnetization common mode device according to claim 1, characterized in that: The inner ring surface of the inner magnetic ring body (5) and the outer ring surface of the outer magnetic ring body (6) are both provided with positioning rings (9), and the positioning rings (9) are provided with positioning grooves adapted to the copper wires (8); The copper wire (8) is wound on the positioning groove.

4. A demagnetization common mode device according to claim 1, characterized in that: The plastic shell (1) is divided into two parts, each of which is equipped with a fixing block (2), and a screw rod (3) is inserted between the two fixing blocks (2); Nuts (4) are symmetrically threadedly mounted at both ends of the screw rod (3), and the nuts (4) abut against the surface of the fixing block (2).

5. A demagnetization common mode device according to claim 1, characterized in that: A push rod (10) is installed inside the plastic shell (1), and the other end of the push rod (10) pushes against the outer ring surface of the positioning ring (9).

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