Asymmetric multi-tap reactor

Abstract

The utility model relates to the technical field of electric reactors, in particular to an asymmetric multi-tap electric reactor which comprises an iron core, the iron core comprises column cores vertically arranged on the left side and the right side, and the column cores, an upper yoke and a lower yoke jointly form an electric reactor magnetic circuit; the first coil is wound on the column core on one side, the second coil is wound on the column core on the other side, only one starting copper bar terminal is arranged on each of the first coil and the second coil, and the total number of turns of the first coil is the same as that of turns of the second coil. According to the utility model, the asymmetric copper bar tap terminals are formed by respectively calculating the self-inductance and mutual inductance of the taps of the two coils, so that the use amount of the copper bar terminals and the winding time can be saved by half, the manufacturing cost and the maintenance difficulty of the reactor are greatly reduced, in addition, the reactor is only provided with one starting copper bar terminal, only one wire needs to be replaced when the inductor is replaced, and the production cost is reduced. The simplification of the copper bar terminal saves space.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to an asymmetric multi-tap reactor. Background Art

[0002] The reactor is a commonly used electrical equipment, widely used in power systems, power electronic equipment and electromagnetic coil design. The main function of the reactor is to limit the rate of change of current, stabilize voltage, improve power factor, and filter harmonics. According to the requirements of the inductance value, the coil can be set with multiple inductance taps. In the existing reactor manufacturing method, two coils are connected in series, and then coils with the same number of turns are symmetrically wound in the two coils. Different inductance values ​​are achieved based on the inductance value being proportional to the square of the number of turns.

[0003] A series inductor with an overheat alarm function, with announcement number "CN218414185U" in the prior art, comprises an iron core and a water tank, wherein the top and bottom of the surface of the iron core are both provided with a retaining frame, the surface of the retaining frame is provided with a heat dissipation groove, the surface of the iron core is wound with a coil, the surface of the retaining frame is installed with a base, one side of the base is penetrated by a fixing bolt, the rear end of the fixing bolt penetrates the base and the iron core and is threadedly provided with a fixing nut. The device can cool the series inductor by air and water at the same time through a fan, a water pump, a cooling pipe and a connecting pipe, so that the heat generated by the series inductor during operation can be dissipated in time, thereby greatly improving its service life; the coolant in the water tank can be stirred through a motor, a rotating rod and a stirring paddle, so that the refrigerator can maintain a uniform temperature of the coolant after refrigeration in the water tank, thereby effectively improving the cooling effect of the series inductor.

[0004] However, the above-mentioned series inductor device with overheat alarm function still has obvious defects during use: the above-mentioned inductor also adopts the symmetrical wiring terminals commonly used in the prior art. When the inductance value demand is too high, this method requires the use of a large number of copper busbar terminals and a large amount of welding work. The finished copper busbar will take up a lot of space, which increases the production cost of the inductor and also increases its maintenance difficulty. Utility Model Content

[0005] The purpose of the utility model is to provide an asymmetric multi-tap reactor to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An asymmetric multi-tap reactor, comprising:

[0008] An iron core, the iron core comprising vertical column cores on the left and right sides, upper and lower ends of the column cores on the left and right sides are respectively fixedly connected to the same upper yoke and lower yoke, and the column core, the upper yoke and the lower yoke together form a reactor magnetic circuit;

[0009] A first coil, the first coil is wound on the cylindrical core on one side, the first coil comprises a plurality of first inductance coils with different numbers of turns, and a first copper bar tap terminal of the same number is welded on the plurality of first inductance coils;

[0010] A second coil, the second coil is wound on the cylindrical core on the other side, the second coil is composed of a plurality of second inductor coils with different numbers of turns, and a plurality of the second coils are welded with a consistent number of second copper bar tap terminals; and,

[0011] The starting copper bar terminal is connected to the end terminal copper bar of the second coil through the end terminal of the first coil, so that the first coil and the second coil become a whole. The starting copper bar of the first coil is the wiring common terminal L0, and the starting copper bar of the second coil is the inductor L7. Each coil has only one starting copper bar terminal, and it is fixedly welded at the joint of the first coil or the second coil; wherein,

[0012] The first coil and the second coil are arranged in series and have the same total number of turns on both sides. Some of the first inductor coils and the second inductor coils are wound non-uniformly, so that the first copper bar tap terminals and the second copper bar tap terminals on both sides are arranged asymmetrically.

[0013] Preferably, the column core, the upper yoke and the lower yoke are all formed by stacking silicon steel sheets, which are magnetic conductive materials, and adhesive is coated between the column core, the upper yoke and the lower yoke to form an iron core adhesive layer.

[0014] Preferably, the upper yoke and the lower yoke are both installed with a pair of clamping plates, and the clamping plates are fastened and fixed by screws, so as to tighten the upper yoke and the lower yoke.

[0015] Preferably, interlayer insulating paper is provided between each winding layer of the first coil and the second coil, and air passages are formed between each winding layer of the first coil and the second coil through separation strips.

[0016] Preferably, the column cores are separated to form air gaps, and the thickness of a single air gap is less than 5 mm.

[0017] Preferably, the upper and lower pressing plates are fixedly connected by a fastening block and a fastening screw.

[0018] Preferably, a base is also fixedly mounted on the bottom of the lower yoke.

[0019] Preferably, heat dissipation fin boxes are fixedly mounted on both sides of the base.

[0020] Preferably, lifting holes are installed on both sides of the clamping plate on one side of the upper yoke.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model calculates the self-inductance and mutual inductance at each tap of the two coils respectively, winds inductor coils with different numbers of turns in the two coils, realizes different inductance values, and forms an asymmetric copper busbar tap terminal. This design can save half of the copper busbar terminal usage and half of the copper busbar welding work hours, greatly reducing the manufacturing cost and maintenance difficulty of the reactor. In addition, the reactor has only one wiring common terminal L0, and only one wire needs to be replaced when replacing the inductor, which greatly simplifies the operating hours of the reactor user and improves work efficiency. The simplification of the copper busbar terminal saves space. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the utility model;

[0024] Figure 2 It is a front cross-sectional schematic diagram of the utility model;

[0025] Figure 3 It is a side cross-sectional schematic diagram of the utility model;

[0026] Figure 4 It is a side view schematic diagram of the utility model;

[0027] Figure 5 It is a schematic diagram of the arrangement of symmetrical tap terminals in the prior art;

[0028] Figure 6 It is a schematic diagram of the asymmetric tap terminal arrangement of the utility model.

[0029] In the figure: 1 iron core, 2 column core, 3 upper yoke, 4 lower yoke, 5 first coil, 6 first copper bar tap terminal, 7 second coil, 8 second copper bar tap terminal, 9 clamping plate, 10 screw, 11 dividing strip, 12 air duct, 13 air gap, 14 fastening block, 15 fastening screw, 16 base, 17 heat sink fin box, 18 lifting hole, 19 starting copper bar terminal. DETAILED DESCRIPTION

[0030] 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.

[0031] See also Figure 1-6 , the utility model provides a technical solution:

[0032] Embodiment 1:

[0033] An asymmetric multi-tap reactor, comprising:

[0034] The iron core 1 includes a column core 2 vertically arranged on the left and right sides, and the upper and lower ends of the column cores 2 on the left and right sides are respectively fixedly connected to the same upper yoke 3 and lower yoke 4, and the column core 2, the upper yoke 3 and the lower yoke 4 together form a reactor magnetic circuit;

[0035] A first coil 5, the first coil 5 is wound on the cylindrical core 2 on one side, the first coil 5 comprises a plurality of first inductance coils with different numbers of turns, and a consistent number of first copper bar tap terminals 6 are welded on the plurality of first inductance coils, including inductances L1 and L2;

[0036] The second coil 7 is wound on the column core 2 on the other side. The second coil 7 is composed of a plurality of second inductor coils with different numbers of turns. A plurality of second coils are welded with a consistent number of second copper bar tap terminals 8, including inductors L3, L4, L5, L6 and L7; and,

[0037] The starting copper bar terminal 19 is connected to the end terminal copper bar of the second coil 7 through the end terminal of the first coil 5, so that the first coil 5 and the second coil 7 become a whole. The beginning of the terminal copper bar of the first coil 5 is the wiring common terminal L0, and the beginning of the terminal copper bar of the second coil 7 is the inductor L7. Each coil has only one starting copper bar terminal 19, and it is fixedly welded at the joint of the first coil 5 or the second coil 7; wherein,

[0038] The first coil 5 and the second coil 7 are arranged in series and the total number of turns on both sides is the same. Several first inductance coils and second inductance coils are wound non-uniformly, so that the first copper bar tap terminals 6 and the second copper bar tap terminals 8 on both sides are arranged asymmetrically.

[0039] The column core 2, the upper yoke 3 and the lower yoke 4 are all formed by stacking magnetic conductive material silicon steel sheets, and adhesive is coated between the column core 2, the upper yoke 3 and the lower yoke 4 to form an iron core adhesive layer.

[0040] A pair of clamping plates 9 are installed on both the upper yoke 3 and the lower yoke 4 . The clamping plates 9 are fastened and fixed by screws 10 , thereby tightening the upper yoke 3 and the lower yoke 4 .

[0041] Interlayer insulation paper is provided between each winding layer of the first coil 5 and the second coil 7. An air passage 12 is formed between each winding layer of the first coil 5 and the second coil 7 through a separator 11. The interlayer insulation paper is H-grade material, and the material is AMA.

[0042] The column cores 2 are separated to form an air gap 13, and the thickness of a single air gap is less than 5 mm, wherein the air gap is an interlayer formed by an H-class insulating board, and the material is GPO-3.

[0043] The upper and lower pressing plates 9 are also fixedly connected via a fastening block 14 and a fastening screw 15 .

[0044] A base 16 is also fixedly mounted on the bottom of the lower yoke 4 .

[0045] Heat dissipation fin boxes 17 are fixedly mounted on both sides of the base 16 .

[0046] Lifting holes 18 are installed on both sides of the clamping plate 9 on one side of the upper yoke 3.

[0047] In this embodiment, 7 tapped inductor reactors are listed, wherein a starting copper bar terminal 19 is welded on the first coil 5, and there are two first copper bar tap terminals 6, namely L1 and L2, and a self-connected copper bar and 5 second copper bar tap terminals 8 are welded in the second coil 7, namely L3, L4, L5, L6 and L7. Since the first copper bar tap terminal 6 and the second copper bar tap terminal 8 correspondingly connected to the first inductor coil and the second inductor coil have different numbers of turns, the calculation method of each inductor coil at this time is to calculate the self-inductance and mutual inductance in each inductor coil respectively, and obtain the total tap inductance through the relationship between the self-inductance and mutual inductance of the two coils, wherein the total inductance value = the sum of the self-inductance of each turn coil and the mutual inductance between each turn coil.

[0048] In the following practice, the cross-sectional area of ​​the column core 2 wound around the first coil 5 and the second coil 7 is S=660cm2, L1=0.4mH, L2=0.8mH, L3=1.2mH, L4=1.6mH, L5=2mH, L6=2.4mH, L7=3mH, and the corresponding turns are: 23 turns, 33 turns, 40 turns, 53 turns, 62 turns, 70 turns, and 78 turns. The total number of turns of the first coil 5 and the second coil 7 during winding is 39 turns, of which the copper bar terminal 19 at the beginning of the first coil 5 is the common end, L1 is tapped out of the first copper bar tap terminal 6 at the 23rd turn, and L2 is tapped out of the first copper bar tap terminal 6 at the 33rd turn. The tap leads to the first copper bar tap terminal 6, and the end terminal is the 39th turn; the starting terminal of the second coil 7 is L7, and L6 leads to the second copper bar tap terminal 8 at the 8th turn. Similarly, L5 is led out at the 16th turn, L4 is led out at the 25th turn, and L3 is led out at the 38th turn. The inductance of L3 is the 39th turn of the first coil 5 and the first turn of the second coil 7. L5 is led out at the 16th turn, and the end terminals of the first coil 5 and the second coil 7 are self-connected through self-connection. Specifically, the present embodiment also discloses a specific structure for connecting and fixing the column core 2, the upper yoke 3 and the lower yoke 4, as well as the corresponding materials.

[0049] The advantage of such a design is that by calculating the self-inductance and mutual inductance of the two coils with different numbers of turns respectively, different numbers of turns are wound in the two coils to achieve different inductance values, which greatly improves the design flexibility of the reactor and reduces the production cost and maintenance difficulty. In addition, compared with the traditional reactor design method, this method can save half of the copper bus terminal usage and half of the copper bus welding labor hours. Moreover, because they share a common wiring terminal L0, when the customer switches the inductor, the common wiring terminal does not need to be removed. Therefore, when switching the inductor, only one wire needs to be replaced, which greatly saves the operating hours of the reactor operator. Therefore, it has broad market demand and good application prospects.

[0050] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An asymmetric multi-tap reactor, characterized in that: include: An iron core, the iron core comprising vertical column cores on the left and right sides, upper and lower ends of the column cores on the left and right sides are respectively fixedly connected to the same upper yoke and lower yoke, and the column core, the upper yoke and the lower yoke together form a reactor magnetic circuit; A first coil, the first coil is wound on a cylindrical core on one side, the first coil includes a plurality of first inductance coils with different numbers of turns, and a plurality of first inductance coils are welded at joints with a consistent number of first copper bar tap terminals, including inductances L1 and L2; A second coil, the second coil is wound on the cylindrical core on the other side, the second coil is composed of a plurality of second inductor coils with different numbers of turns, and a plurality of second coils are welded at joints with a consistent number of second copper bar tap terminals, including inductors L3, L4, L5, L6 and L7; and, The starting copper bar terminal is connected to the end terminal copper bar of the second coil through the end terminal of the first coil, so that the first coil and the second coil become a whole. The starting copper bar of the first coil is the wiring common terminal L0, and the starting copper bar of the second coil is the inductor L7. Each coil has only one starting copper bar terminal, and it is fixedly welded at the joint of the first coil or the second coil; wherein, The first coil and the second coil are arranged in series and have the same total number of turns on both sides. Some of the first inductor coils and the second inductor coils are wound non-uniformly, so that the first copper bar tap terminals and the second copper bar tap terminals on both sides are arranged asymmetrically.

2. An asymmetric multi-tap reactor according to claim 1, characterized in that: The column core, the upper yoke and the lower yoke are all formed by stacking magnetic conductive silicon steel sheets, and adhesive is coated between the column core, the upper yoke and the lower yoke to form an iron core adhesive layer.

3. An asymmetric multi-tap reactor according to claim 2, characterized in that: The upper yoke and the lower yoke are both equipped with a pair of clamping plates, and the clamping plates are fastened and fixed by screws, so as to tighten the upper yoke and the lower yoke.

4. An asymmetric multi-tap reactor according to claim 1 or 3, characterized in that: Interlayer insulating paper is provided between each winding layer of the first coil and the second coil, and air passages are formed between each winding layer of the first coil and the second coil through separation strips.

5. The asymmetric multi-tap reactor according to claim 1, characterized in that: The column cores are separated to form air gaps, and the thickness of a single air gap is less than 5 mm.

6. The asymmetric multi-tap reactor according to claim 3, characterized in that: The upper and lower pressing plates are also fixedly connected by a fastening block and a fastening screw.

7. An asymmetric multi-tap reactor according to claim 6, characterized in that: A base is also fixedly mounted on the bottom of the lower yoke.

8. An asymmetric multi-tap reactor according to claim 7, characterized in that: Heat dissipation fin boxes are fixedly installed on both sides of the base.

9. An asymmetric multi-tap reactor according to claim 8, characterized in that: Lifting holes are installed on both sides of the clamping plate on one side of the upper yoke.

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