CN109378169B - Reactor - Google Patents

Abstract

A reactor, comprising: the electric reactor comprises a plurality of iron core columns, coils sleeved on the iron core columns, an upper iron yoke and a lower iron yoke, wherein the electric reactor further comprises an insulation fixing frame, the insulation fixing frame comprises a back plate, a first supporting plate and a second supporting plate, the back plate comprises a first surface and a second surface which are opposite to each other, the first supporting plate and the second supporting plate are respectively and vertically connected with the first surface and are mutually parallel, the iron core columns are arranged between the first supporting plate and the second supporting plate side by side, the upper iron yoke is arranged on the surface of the first supporting plate, which is away from the second supporting plate, the lower iron yoke is arranged on the surface of the second supporting plate, which is away from the first supporting plate, the back plate is further provided with a plurality of lead holes, the coils comprise lead ends, and the lead ends are arranged outside the second surface in a penetrating mode.

Description

Reactor

Technical field

The invention relates to the field of electronic technology, and in particular to a reactor.

Background technique

As a means of reactive power compensation, reactors are indispensable in power systems. They can be used to limit current shocks caused by sudden changes in grid voltage and operating overvoltage, to smooth spike pulses contained in the power supply voltage, or to smooth the commutation of bridge rectifier circuits. The voltage defects generated effectively protect the inverter and improve the power factor. It can not only prevent interference from the power grid, but also reduce the pollution of the power grid caused by the harmonic current generated by the rectifier unit.

Reactors usually include a coil and an iron core surrounded by the coil. However, with the development of rail transit and new energy industries, the requirements for the installation and use environment of reactors are getting higher and higher, requiring compact structure, high reliability, high power density, low cost and easy installation. Traditional three-phase asymmetric unbalanced loads use independent reactors for each phase, resulting in the need for three reactors for three phases, which takes up a lot of space, is costly, and is time-consuming to install.

Therefore, it is necessary to provide a reactor that can overcome the above technical problems.

Contents of the invention

The object of the present invention is to provide a reactor with a simple structure and easy installation.

A reactor, including: a plurality of iron core columns, a coil set on each of the iron core columns, an upper iron yoke and a lower iron yoke. The reactor also includes an insulating fixing frame, and the insulating fixing frame It includes a back plate, a first support plate and a second support plate. The back plate includes opposite first and second surfaces. The first support plate and the second support plate are respectively vertically connected to the first surface. and parallel to each other, a plurality of the iron core columns are arranged side by side between the first support plate and the second support plate, and the upper iron yoke is arranged on the surface of the first support plate away from the second support plate, so The lower iron yoke is disposed on the surface of the second support plate facing away from the first support plate. The back plate is also provided with a plurality of lead holes. The coil includes a lead end, and the lead end passes through the Lead holes are located outside the second surface.

Compared with the prior art, in the reactor provided by the present invention, the iron core column, the coil set on each of the iron core columns, the upper iron yoke and the lower iron yoke can all be fixed and formed by the insulating fixing frame. In one piece, the structure is simple. The lead end included in the coil can pass through the lead hole and is located outside the second surface of the insulating fixing frame. The insulating fixing frame can position and tighten the coil. In this way, during electrical connection When using the backplane positioning support, plug the lead end of the reactor into the circuit board to achieve quick installation of the reactor.

Description of the drawings

FIG. 1 is a three-dimensional structural view from one direction of the reactor provided by the first embodiment of the present invention.

FIG. 2 is a three-dimensional structural view of the reactor shown in FIG. 1 from another direction.

FIG. 3 is an exploded view of the reactor shown in FIG. 1 .

FIG. 4 is a cross-sectional view along the IV-IV direction of the reactor shown in FIG. 2 .

Figure 5 is a three-dimensional structural view of a reactor provided by the second embodiment of the present invention.

Description of main component symbols

Reactor 100, 200

Insulating holder 10

Iron core post 20

Coil 30

Upper iron yoke 40

Lower iron yoke 50

Backplane 11

First support plate 13

Second support plate 15

First surface 110

Second surface 120

Through hole 160

Lead hole 130

Upper end 21

Lower end 22

Lead terminal 301

Air gap 41

Insulating sheet 43

Positioning hole 55

Clamp 60

Clamping piece 61

Hole 63

Fasteners 70

Fixed piece 80

stud 71

Nut 72

Locking piece 73

Gasket 74

Fixing hole 81

The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIGS. 1-4 , which shows a reactor 100 provided in the first embodiment of the present invention. The reactor 100 is a four-phase four-column reactor. The reactor 100 includes an insulating fixed frame 10 , four iron core columns 20 , a coil 30 set on the iron core columns 20 , an upper iron yoke 40 and a lower iron yoke 50 .

The insulation fixing frame 10 is a non-magnetic steel plate, which not only ensures the insulation effect, but also has high strength. The non-magnetic steel plate has high thermal conductivity and is easy to dissipate heat, making the reactor 100 suitable for use in various harsh environments. The insulation fixing frame 10 includes a back plate 11 , a first support plate 13 and a second support plate 15 . The back plate 11 includes a first surface 110 and a second surface 120 opposite to each other. The first support plate 13 and the second support plate 15 are respectively vertically connected to the first surface 110 and parallel to each other. The back plate 11 is provided with a plurality of lead holes 130 , and the first support plate 13 and the second support plate 15 are respectively provided with through holes 160 . The lead hole 130 corresponds to the lead end 301 included in the coil 30 , and the through hole 160 corresponds to the iron core post 20 .

The core post 20 is made of oriented highly saturated silicon steel sheet material, which improves the ability of the reactor 100 to resist high-frequency harmonics and greatly reduces the loss of the core post 20 . The iron core column 20 is a cylinder or a cube. The iron core posts 20 are arranged side by side between the first support plate 13 and the second support plate 15 , and the upper end 21 and the lower end 22 of the iron core posts 20 respectively correspond to the through holes 160 . In this embodiment, the upper end 21 and the lower end 22 of the iron core column 20 are respectively located in the through holes 160 .

The coil 30 is a vertical coil formed by vertical winding of enameled copper wire. The coil 30 includes a lead end 301, and the lead end 301 of the coil 30 is plated with a tin layer. The coil 30 can withstand a temperature of 200 degrees for a long time, and has excellent thermal shock resistance, short circuit resistance, heat dissipation and good insulation properties. The coil 30 is sleeved on the iron core post 20 , and the upper and lower end surfaces of the coil 30 are spaced apart from the first support plate 13 and the second support plate 15 respectively. With this arrangement, a gap is formed between the upper and lower ends of the coil 30 and the support plate, which is beneficial to the heat dissipation of the reactor 100 and complies with safety regulations. The lead end 301 passes through the lead hole 130 to be located outside the second surface 120 of the insulating fixing frame 10 . In this embodiment, each coil 30 includes two lead terminals 301 , the lead directions of the two lead terminals 301 are consistent, and the back plate 11 is provided with a number of lead holes 130 consistent with the number of the lead terminals 301 .

The upper iron yoke 40 is disposed on the surface of the first support plate 13 facing away from the second support plate 15 , and the lower iron yoke 50 is disposed on the surface of the second support plate 15 facing away from the first support plate 13 surface. The upper iron yoke 40 and the lower iron yoke 50 have the same size and shape. An air gap 41 is formed between the upper iron yoke 40 and the lower iron yoke 50 and the upper end 21 and the lower end 22 of the iron core column 20 respectively. The air gap 41 is filled with insulating sheets 43 . That is, the insulating sheet 43 is disposed on the upper end 21 and the lower end 22 of the iron core column 20 . After the insulating sheet 43 is installed, the surface where the insulating sheet 43 is located is flush with the surface where the first support plate 13 / the second support plate 15 is located. The upper iron yoke 40 and the lower iron yoke 50 are respectively provided with positioning holes 55 .

The end surface area of the upper or lower end of the iron core post 20 is S1. The upper iron yoke 40 (or the lower iron yoke 50) and the upper end (or lower end) of the iron core post 20 include holes corresponding to the size and position of the through hole 160. Corresponding area S2, S1=S2, or the thickness of the iron core post 20 (the thickness refers to the length of the iron core post extending from away from the back plate 11 to close to the back plate 11 in the installed state) and the upper iron yoke 40 or the lower The width of the iron yoke 50 is the same. This arrangement, combined with the insulating sheets 43 at the upper and lower ends of the iron core post 20, enables the reactor 100 to operate with low noise and strong anti-saturation capability.

The reactor 100 also includes the same number of clamping members 60 as the core posts 20 . Each clamping member 60 includes two clamping pieces 61. The two clamping pieces 61 are passed through the through holes 160 respectively included in the first support plate 13 and the second support plate 15 and clamped therebetween. The two opposite surfaces of the iron core pillars 20 , that is, the arrangement direction of the clamping piece 61 is perpendicular to the arrangement direction of each iron core pillar 20 , in order to ensure the stability of the iron core pillars 20 . The clamping piece 61 has a hole 63 corresponding to the position of the positioning hole 55 .

The reactor also includes fasteners 70 and fixing pieces 80 provided on two opposite surfaces of the upper/lower iron yoke. The fixed piece 80 is a non-magnetic steel piece, which can realize the waterproof, moisture-proof and magnetic leakage-proof functions of the reactor 100 . The fixing piece 80 clamps the clamping piece 61 . The fixing piece 80 is provided with a fixing hole 81 corresponding to the position of the positioning hole 55 included in the upper iron yoke 40 /lower iron yoke 50 .

The fastener 70 includes a stud 71 , a nut 72 , a locking piece 73 and a washer 74 . The locking piece 73 and the gasket 74 ensure the fastening effect, so that the nut 72 is not easy to loosen after being tightened, thereby ensuring the positional stability of the iron core column 20 . The locking piece 73 has a T-shaped structure with a central hole. The locking piece 73 is sleeved in the fixing hole 81 on the fixing piece 80 and the hole 63 on the clamping piece 61 . The washer 74 is disposed on the surface of the locking piece 73, and the stud 71 passes through the washer 74, the center hole of the locking piece 73, and the positioning of the upper iron yoke/lower iron yoke. The hole 55 is connected to the opposite fixing piece 80 and then fixed by a nut 72 . After the reactor 100 is assembled through the fasteners 70, the entire reactor 100 is impregnated with insulating paint to realize the functions of the reactor 100 being waterproof, moisture-proof, and preventing magnetic flux leakage.

The four iron core posts 20 included in the reactor 100 and the coils 30 set on their outer surfaces respectively form A, B, C, and N phases, and each corresponds to the corresponding A, B, C, and N phase of the power supply (wherein N phase is zero line). The fourth phase magnetic circuit of the reactor 200 can provide a magnetic flux loop for the zero-sequence current, and generate high impedance through the coil 30 attached thereto, suppressing the generation of zero-sequence current, thereby reducing the temperature of the reactor, and improving the safety and reliability of the reactor 200 sex. The reactor 200 provided in this embodiment is small in size, reduces cost, enhances structural strength, and is easy to install. It is suitable for three-phase four-wire systems with asymmetrical unbalanced loads and high switching frequencies.

Please refer to Figure 5. Figure 5 shows a reactor 200 provided in a second embodiment of the present invention. The reactor 200 provided in the second embodiment has basically the same structure as the reactor 100 provided in the first embodiment, and also includes an insulating fixed frame 10 , an upper iron yoke 40 and a lower iron yoke 50 . The difference is that the reactor 200 includes three core columns 20 arranged in parallel, and each core column 20 is covered with a coil 30 . The reactor 200 is a three-phase reactor.

To sum up, the reactors 100 and 200 provided by the present invention, including the iron core post 20, the coil 30 set on each of the iron core posts, the upper iron yoke 40 and the lower iron yoke 50 can all pass through The insulating fixing frame 10 is fixed and integrated, and has a simple structure; the lead end of the coil 30 can pass through the lead hole located outside the second surface 120 of the insulating fixing frame 10, and the insulating fixing frame 10 can The coil 30 is positioned and fastened. In this way, during electrical connection, the back plate 11 included in the insulating fixing frame 10 is used for positioning and support, and the lead end 301 of the reactor 100 is inserted into the circuit board to be installed. This can be achieved Quick installation of reactor 100.

For those skilled in the art, other changes can be made within the technical concept of the present invention. However, any other corresponding changes and modifications made based on the technical concept of the present invention shall fall within the protection scope of the claims of the present invention.

Claims (8)

1. A reactor, including: a plurality of iron core columns, a coil set on each of the iron core columns, an upper iron yoke and a lower iron yoke, characterized in that the reactor also includes an insulating fixing frame, The insulating fixing frame includes a back plate, a first support plate and a second support plate. The back plate includes a first surface and a second surface opposite to each other. The first support plate and the second support plate are respectively connected with the The first surfaces are vertically connected and parallel to each other. A plurality of the iron core columns are arranged side by side between the first support plate and the second support plate. The upper iron yoke is arranged on the first support plate away from the second support. The lower iron yoke is disposed on the surface of the second support plate facing away from the first support plate, the coil is adjacent to the first surface, and the back plate is also provided with a plurality of lead holes. , the coil includes a plurality of lead terminals, a plurality of the lead wire holes corresponding to a plurality of the lead wire terminals, the lead wire terminals pass through the lead wire holes and are located outside the second surface, and the lead wire terminals are Circuit board plug-in; The reactor also includes a number of clamping parts consistent with the number of iron core columns. Each clamping part includes 2 clamping pieces. The first support plate and the second support plate are respectively provided with through holes, and the 2 said The clamping pieces are respectively passed through the through holes and clamped on the two opposite surfaces of the iron core column, and then fixed to the upper iron yoke and the lower iron yoke; The reactor also includes fasteners and fixed pieces arranged on two opposite surfaces of the upper and lower iron yokes. The fixed pieces sandwich the clamping piece, and the fasteners pass through the fixed pieces and the fixing pieces. The clamping piece and the upper and lower iron yokes fix the upper iron yoke, the iron core column and the lower iron yoke into one body. 2. The reactor according to claim 1, wherein the coil is a vertical coil formed by vertical winding of enameled copper wire, and the lead end of the coil is plated with a tin layer. 3. The reactor according to claim 1, characterized in that air gaps are respectively formed between the upper and lower ends of the iron core column and the upper and lower iron yokes. 4. The reactor according to claim 3, characterized in that the air gap is filled with insulating sheets. 5. The reactor according to claim 1, wherein the thickness of the iron core column is the same as the width of the upper iron yoke or the lower iron yoke. 6. The reactor according to claim 1, wherein the upper and lower ends of the coil are spaced apart from the first support plate and the second support plate respectively. 7. The reactor according to any one of claims 1 to 6, characterized in that: the number of the iron core columns is three, and the reactor is a three-phase reactor. 8. The reactor according to any one of claims 1 to 6, characterized in that: the number of the iron core columns is 4, and the reactor is a four-phase four-column reactor.