CN109378169B

CN109378169B - Reactor with a reactor body

Info

Publication number: CN109378169B
Application number: CN201811378032.XA
Authority: CN
Inventors: 张立品; 张礼扬; 鞠万金; 汪兆华; 李战功; 王昭翔; 谢光元; 郑慧疆
Original assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Current assignee: SHENZHEN JINGQUANHUA ELECTRONICS CO LTD
Priority date: 2018-11-19
Filing date: 2018-11-19
Publication date: 2024-03-12
Anticipated expiration: 2038-11-19
Also published as: CN109378169A

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 with a reactor body

Technical Field

The invention relates to the technical field of electronics, in particular to a reactor.

Background

The reactor is an indispensable reactive compensation means in a power system, can be used for limiting current impact caused by sudden change of power grid voltage and operation overvoltage, smoothing spike pulses contained in power supply voltage or smoothing voltage defect generated when a bridge rectifier circuit commutates, and effectively protects a frequency converter and improves power factor. The method can prevent interference from the power grid and reduce pollution of harmonic current generated by the rectifying unit to the power grid.

The reactor generally includes a coil and a core surrounded by the coil. However, with the development of rail transit and new energy industries, the requirements on the installation and use environment of the reactor are higher and higher, and the reactor is required to have compact structure, high reliability, high power density, low cost and easy installation. The traditional three-phase asymmetric unbalanced load adopts reactors with independent phases, so that three phases are required to be reacted, the occupied space is large, the cost is high, and the installation time is more.

Accordingly, there is a need to provide a reactor that overcomes the above technical problems.

Disclosure of Invention

The invention aims to provide a reactor which is simple in structure and easy to install.

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 in a penetrating mode, which are located outside the second surface.

Compared with the prior art, the reactor provided by the invention has the advantages that the iron core columns, the coils sleeved on each iron core column, the upper iron yoke and the lower iron yoke can be fixed into a whole through the insulating fixing frames, the structure is simple, the lead ends included in the coils can be penetrated out of the second surfaces of the insulating fixing frames, and the insulating fixing frames can be used for positioning and fastening the coils, so that the lead ends of the reactor and the circuit board can be inserted by utilizing the back plate positioning support during electric connection, and the rapid installation of the reactor can be realized.

Drawings

Fig. 1 is a perspective view of one direction of a reactor according to a first embodiment of the present invention.

Fig. 2 is a perspective view of the reactor shown in fig. 1 in another direction.

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

Fig. 4 is a sectional view of the reactor shown in fig. 2 in the IV-IV direction.

Fig. 5 is a perspective view of a reactor according to a second embodiment of the present invention.

Description of the main reference signs

Reactor 100, 200

Insulating holder 10

Core limb 20

Coil 30

Upper yoke 40

Lower yoke 50

Backboard 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

Clamping member 60

Clamping piece 61

Hole 63

Fastener 70

Fixing piece 80

Stud 71

Nut 72

Locking piece 73

Gasket 74

Fixing hole 81

The invention will be further described in the following detailed description in conjunction with the above-described figures.

Detailed Description

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

Referring to fig. 1-4, a reactor 100 according to a first embodiment of the present invention is provided. The reactor 100 is a four-phase four-pole reactor. The reactor 100 includes an insulating holder 10, 4 core legs 20, a coil 30 sleeved on the core legs 20, an upper yoke 40 and a lower yoke 50.

The insulating fixing frame 10 is a non-magnetic steel plate, which has high strength while ensuring insulating effect, and the non-magnetic steel plate has high thermal conductivity and is easy to dissipate heat, so that the reactor 100 is suitable for various harsh environments. The insulating holder 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 connected perpendicularly 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 a through hole 160. The lead hole 130 corresponds to the lead terminal 301 included in the coil 30, and the through hole 160 corresponds to the core limb 20.

The iron core column 20 is an oriented high-saturation silicon steel sheet material member, so that the capability of the reactor 100 for resisting high-frequency harmonic waves is improved, and the loss of the iron core column 20 is greatly reduced. The core limb 20 is cylindrical or cubic. The core leg 20 is disposed between the first support plate 13 and the second support plate 15, and the upper end 21 and the lower end 22 of the core leg 20 respectively correspond to the through hole 160. In this embodiment, the upper ends 21 and the lower ends 22 of the core legs 20 are respectively located in the through holes 160.

The coil 30 is a vertical coil formed by vertically winding enamelled copper wires, the coil 30 comprises lead ends 301, and the lead ends 301 of the coil 30 are plated with tin layers. The coil 30 is resistant to 200 ℃ for a long period of time, and has excellent thermal shock resistance, short circuit resistance, heat dissipation and good insulation properties. The coil 30 is sleeved with the iron core column 20, and the upper end surface and the lower end surface of the coil 30 are respectively spaced from the first support plate 13 and the second support plate 15. So arranged, the upper and lower ends of the coil 30 and the support plate form a gap therebetween, which is favorable for heat dissipation of the reactor 100 and meets safety regulations. The lead terminal 301 is inserted through the lead hole 130 to be located outside the second surface 120 of the insulating holder 10. In this embodiment, each coil 30 includes 2 lead terminals 301, the lead directions of the two lead terminals 301 are identical, and the back plate 11 is provided with lead holes 130 the number of which is identical to that of the lead terminals 301.

The upper yoke 40 is disposed on a surface of the first support plate 13 facing away from the second support plate 15, and the lower yoke 50 is disposed on a surface of the second support plate 15 facing away from the first support plate 13. The upper yoke 40 and the lower yoke 50 are the same in size and shape. An air gap 41 is formed between the upper yoke 40 and the lower yoke 50 and the upper ends 21 and the lower ends 22 of the core limbs 20, respectively, and between the upper yoke 40 and the lower yoke 50. The air gap 41 is filled with an insulating sheet 43. That is, the insulating sheets 43 are provided at the upper ends 21 and the lower ends 22 of the core limbs 20. After the insulating sheet 43 is disposed, the surface of the insulating sheet 43 is flush with the surface of the first support plate 13/the second support plate 15. The upper yoke 40 and the lower yoke 50 are respectively provided with a positioning hole 55.

The end surface area of the upper end or the lower end of the core leg 20 is S1, the upper yoke 40 (or the lower yoke 50) and the upper end (or the lower end) of the core leg 20 include corresponding areas S2, s1=s2 corresponding to the size and the position of the through hole 160, or the thickness of the core leg 20 (the thickness refers to the length of the core leg extending from the back plate 11 to the back plate 11 in the mounted state) is the same as the width of the upper yoke 40 or the lower yoke 50. The arrangement is such that the insulating sheets 43 at the upper and lower ends of the core limb 20 are matched to reduce noise and enhance saturation resistance when the reactor 100 is operated.

The reactor 100 further includes a number of clamps 60 corresponding to the number of core limbs 20. Each clip 60 includes 2 clip tabs 61. The 2 clamping pieces 61 are respectively inserted from the through holes 160 of the first support plate 13 and the second support plate 15 and clamp the two opposite surfaces of the core limb 20, that is, the arrangement direction of the clamping pieces 61 is perpendicular to the arrangement direction of each core limb 20, so as to ensure the stability of the core limb 20. The clamping piece 61 is provided with a hole 63 corresponding to the position of the positioning hole 55.

The reactor further includes a fastening member 70 and fixing pieces 80 provided at opposite surfaces of the upper/lower yokes. The fixing piece 80 is a non-magnetic steel piece, and can realize the functions of waterproof, dampproof and magnetic leakage prevention of the reactor 100. The fixing piece 80 sandwiches the clamping piece 61. The fixing piece 80 is provided with fixing holes 81 corresponding to the positions of the positioning holes 55 included in the upper yoke 40/the lower yoke 50.

The fastener 70 includes a stud 71, a nut 72, a locking tab 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 screwed down, and the position stability of the iron core column 20 is further ensured. The locking piece 73 has a T-shaped structure with a central hole, and 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 central hole of the locking piece 73, and the positioning hole 55 of the upper/lower yoke to the opposite other fixing piece 80, and is fixed by the nut 72. The reactor 100 is integrally impregnated with an insulating paint after being assembled by the fastener 70, so as to realize the functions of waterproof, dampproof and magnetic leakage prevention of the reactor 100.

The reactor 100 includes 4 parallel core legs 20 and coils 30 sleeved on the outer surfaces thereof, which form A, B, C, N phases, respectively, and each correspond to A, B, C, N phases (N phases are zero lines) to which a power source is connected. 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 sleeved outside the magnetic flux loop, so that the generation of the zero sequence current is restrained, the temperature of the reactor is reduced, and the safety and reliability of the reactor 200 are improved. The reactor 200 provided in this embodiment is small in size, low in cost, enhanced in structural strength, easy to install, and suitable for three-phase four-wire system sites with three-phase asymmetric unbalanced load and higher switching frequency.

Referring to fig. 5, fig. 5 shows a reactor 200 according to a second embodiment of the present invention. The reactor 200 according to the second embodiment has substantially the same structure as the reactor 100 according to the first embodiment, and includes an insulating holder 10, an upper yoke 40, and a lower yoke 50. The difference is that: the reactor 200 includes 3 core columns 20 arranged in parallel, and a coil 30 is sleeved on each core column 20. The reactor 200 is a three-phase reactor.

In summary, the reactors 100 and 200 according to the present invention include the core columns 20, the coils 30 sleeved on each core column, the upper yoke 40 and the lower yoke 50, which can be fixed together by the insulating fixing frame 10, and have a simple structure; the lead ends of the coils 30 can be inserted through the lead holes and located outside the second surface 120 of the insulating fixing frame 10, and the insulating fixing frame 10 can position and fasten the coils 30, so that during electrical connection, the back plate 11 included in the insulating fixing frame 10 is utilized to position and support, and the lead ends 301 of the reactor 100 are inserted with a circuit board to be installed, so that the rapid installation of the reactor 100 can be realized.

Other variations within the spirit of the present invention will occur to those skilled in the art, however, other corresponding variations and modifications are contemplated in accordance with the present invention and are intended to fall within the scope of the appended claims.

Claims

1. A reactor, comprising: the reactor comprises a plurality of iron core columns, coils sleeved on the iron core columns, an upper iron yoke and a lower iron yoke, and is characterized by further comprising an insulating fixing frame, wherein the insulating 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 parallel to each other, 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 coil is adjacent to the first surface, the back plate is further provided with a plurality of lead holes, the lead holes are in one-to-one correspondence with the lead ends, the lead holes are arranged outside the second surface in a penetrating manner, and the lead ends are inserted with a circuit board;

the reactor further comprises clamping pieces, the number of which is consistent with that of the iron core columns, each clamping piece comprises 2 clamping pieces, through holes are respectively formed in the first supporting plate and the second supporting plate, and the 2 clamping pieces are respectively penetrated from the through holes and clamped on two opposite surfaces of the iron core columns and then are fixed with the upper iron yoke and the lower iron yoke;

the reactor further comprises a fastener and fixing pieces arranged on two opposite surfaces of the upper iron yoke and the lower iron yoke, the clamping pieces are clamped by the fixing pieces, and the upper iron yoke, the iron core column and the lower iron yoke are fixed into a whole by the fastener penetrating through the fixing pieces, the clamping pieces and the upper iron yoke and the lower iron yoke.

2. The reactor according to claim 1, characterized in that: the coil is a vertical coil formed by vertically winding enamelled copper wires, and a tin layer is plated at the lead end of the coil.

3. The reactor according to claim 1, characterized in that: and air gaps are respectively formed between the upper end and the lower end of the iron core column and the upper iron yoke and the lower iron yoke.

4. A reactor as claimed in claim 3, characterized in that: the air gap is filled with an insulating sheet.

5. The reactor according to claim 1, characterized in that: 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, characterized in that: the upper end and the lower end of the coil are respectively spaced from the first support plate and the second support plate.

7. A reactor according to any one of claims 1 to 6, characterized in that: the number of the iron core columns is 3, and the reactor is a three-phase reactor.

8. A 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.