CN114388245A

CN114388245A - Compact type anode saturable reactor

Info

Publication number: CN114388245A
Application number: CN202111676921.6A
Authority: CN
Inventors: 汪得利; 万燕; 吴喜明; 钱春元
Original assignee: Jiashan Sunking Electrical Equipment Technology Co ltd
Current assignee: Jiashan Sunking Electrical Equipment Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-04-22

Abstract

A compact type anode saturable reactor comprises an epoxy shell, a bifilar coil, an iron core and an elastic protective layer. The epoxy shell comprises a shell body, an insulating terminal, a coil accommodating groove and an iron core mounting hole. Each of the insulated terminals includes an insulated terminal body and a mounting hole. The double-winding coil comprises a first coil and a second coil. The first coil includes a first coil body, a first connection line. The second coil comprises a second coil main body and a second connecting wire. The two coil accommodating grooves are respectively superposed with the central axes of the two iron core mounting holes. The first coil body and the second coil body are respectively accommodated in the two coil accommodating grooves. The first connecting wire and the second connecting wire are respectively accommodated in the mounting holes of the two insulating terminals, so that the creepage distance of the reactor is increased. The compact anode saturable reactor has the advantages of compact structure and small volume, and ensures the reliability of the reactor under higher lightning impulse voltage.

Description

Compact type anode saturable reactor

Technical Field

The invention belongs to the technical field of valve saturable reactors, and particularly relates to a compact anode saturable reactor.

Background

Reactors, also called inductors, are electrical conductors that, when energized, generate a magnetic field in a certain spatial area occupied by a conductor, so that all electrical conductors capable of carrying current are inductive in the general sense. The saturation time of a valve saturable reactor is mainly related to the volt-second characteristic of the reactor (i.e. the voltage time area of the reactor). The voltage time area of the valve reactor is an important index for measuring the performance of the reactor, and the voltage time area is represented by the product of voltage and time when the reactor works in an unsaturated region.

Such as a chinese patent reactor, a reactor manufacturing method, and a reactor component, patent No. CN201280004669.7, the reactor includes a combined body including a coil and a magnetic core, and a case that houses the combined body. The case includes a bottom plate portion made of aluminum, a side wall portion made of insulating resin, and a bonding layer formed on an inner face of the bottom plate portion for fixing the coil. Since the bottom plate portion and the side wall portion are separate members and are integrated with each other with bolts or the like, the processing time is increased. In addition, with the continuous development of a power grid system, special requirements are provided for the application of the reactor, and the valve reactor which is large in voltage time area, high in insulating property requirement and strong in lightning impulse resistance is urgently needed to be matched with a new power grid technology. The voltage time area of the reactor is in direct proportion to the iron core section and the number of turns of the coil of the product. Therefore, the size of the reactor structure is increased along with the increase of the voltage time area of the reactor, and the size of the reactor is increased along with the increase of the insulation performance requirement. And the research of new technology puts further demands on the miniaturization of products.

Disclosure of Invention

In view of the above, the invention provides a compact anode saturable reactor with a simple structure, so as to meet the requirement of a novel power grid system on a valve reactor.

A compact anode saturable reactor comprises an epoxy shell, a bifilar coil arranged in the epoxy shell, an iron core arranged on the bifilar coil, and an elastic protective layer arranged between the iron core and the epoxy shell. The epoxy shell comprises a shell body, two insulation terminals are symmetrically arranged on two sides of the shell body, two coil accommodating grooves are symmetrically arranged in the shell body, and two iron core mounting holes are formed in the shell body at intervals. Each of the insulated terminals includes an insulated terminal body and a mounting hole provided in an axial direction of the insulated terminal body. Each mounting hole is communicated with one coil accommodating groove. The double-winding coil comprises a first coil and a second coil which are sequentially accommodated in the coil accommodating groove. The first coil and the second coil are connected with each other. The first coil includes a first coil body, a first connection line provided on the first coil body. The second coil comprises a second coil main body and a second connecting wire arranged on the second coil main body. The first coil body and the second coil body are respectively accommodated in the two coil accommodating grooves. The first connecting wire and the second connecting wire are respectively accommodated in the mounting holes of the two insulating terminals, so that the creepage distance of the reactor is increased.

Further, the epoxy housing is made of epoxy resin by casting.

Further, the shell body and the insulating terminal are integrally formed.

Further, the epoxy housing further comprises a plurality of fixing inserts disposed on one side of the epoxy housing.

Further, the outer profile of the insulated terminal is tapered.

Further, the iron core is fixedly connected in the epoxy shell.

Further, the first coil and the second coil are integrally formed.

Further, the two coil accommodating grooves are respectively overlapped with the central axes of the two iron core mounting holes.

Compared with the prior art, the compact type anode saturable reactor provided by the invention has the advantages that the first coil and the second coil of the double-winding coil are connected with each other, so that the number of turns of the reactor coil is effectively increased. And the epoxy shell is provided with two insulating terminals, and the first connecting wire and the second connecting wire are respectively accommodated in the mounting holes of the two insulating terminals, so that the first coil and the second coil are arranged on the insulating terminals, and the creepage distance of the reactor and the capacity of the reactor for bearing lightning impulse voltage are effectively increased. The two coil accommodating grooves are respectively superposed with the central axes of the two iron core mounting holes, the first coil main body and the second coil main body are respectively accommodated in the two coil accommodating grooves, and when the iron core is inserted into the iron core mounting holes, the double-winding coil is wrapped on the iron core, so that the volume structure of the reactor is reduced. The compact anode saturable reactor has the advantages of compact structure and small volume, and ensures the reliability of the reactor under higher lightning impulse voltage.

Drawings

Fig. 1 is a schematic structural diagram of a compact anode saturable reactor provided by the invention.

Fig. 2 is a schematic sectional structure view of the compact anode saturable reactor of fig. 1 along the direction a-a.

FIG. 3 is a schematic diagram of the cross-sectional structure of the compact anode saturable reactor of FIG. 1 along B-B.

Detailed Description

Specific examples of the present invention will be described in further detail below. It should be understood that the description herein of embodiments of the invention is not intended to limit the scope of the invention.

As shown in fig. 1 to fig. 3, which are schematic structural diagrams of the compact anode saturable reactor provided by the present invention. The compact anode saturable reactor comprises an epoxy shell 10, a double-winding coil 20 arranged in the epoxy shell 10, a core 30 arranged on the double-winding coil 20, and an elastic protective layer 40 arranged between the core 30 and the epoxy shell 10. The compact anode saturable reactor also comprises other functional modules, such as assembly components and the like, which are well known to those skilled in the art, and are not described in detail herein.

The epoxy housing 10 includes a housing body 11, two insulation terminals 12 symmetrically disposed at two sides of the housing body 11, two coil receiving slots 13 symmetrically disposed in the housing body 11, two iron core mounting holes 14 disposed at intervals on the housing body 11, and a plurality of fixing inserts 15 disposed at one side of the housing body 11. The housing body 11 and the insulating terminal 12 are integrally formed to ensure the structural strength of the epoxy housing 10.

The epoxy housing 10 is made by epoxy resin casting, and in the processing process, the double-winding coil 20 of the epoxy housing 10 is integrated by means of epoxy resin integral casting, so that the number of parts for mounting and fixing the double-winding coil 20 is reduced, and the integrally cast double-winding coil 20 structure effectively shortens the mounting distance between two following first coils 21 and a following second coil 22, and effectively saves the space size of the reactor.

Each of the insulated terminals 12 includes an insulated terminal body 121, and a mounting hole 122 provided in an axial direction of the insulated terminal body 121. In the present embodiment, the outer profile of the insulated terminal 12 is tapered, and each of the mounting holes 122 communicates with one of the coil receiving slots 13, the mounting hole 122 is used for receiving the double-winding coil 20, and the mounting hole 122 will be described in detail in conjunction with the double-winding coil 20.

The iron core mounting hole 14 is used for inserting the iron core 30, so that the iron core 30 and the epoxy shell 10 are connected into a whole.

The fixing insert 15 is disposed on the housing body 11 to facilitate installation and fixation in the housing body 11. In the process of machining and molding, the fixing insert 15 is pre-embedded during the epoxy casting of the bifilar coil 20, so as to connect the fixing insert 15 and the housing body 11 together.

The double-winding coil 20 includes a first coil 21 and a second coil 22 sequentially accommodated in the coil accommodating groove 13. The first coil 21 and the second coil 22 are connected with each other, the first coil 21 and the second coil 22 are integrally formed, and the first coil 21 and the second coil 22 are formed by spirally winding a wire to form two coils.

The first coil 21 includes a first coil body 211, and a first connection line 212 provided on the first coil body 211.

The second coil 22 includes a second coil body 221, and a second connection line 222 provided on the second coil body 221.

The first connection line 212 and the second connection line 222 are respectively accommodated in the mounting holes 122 of the two insulation terminals 12 to achieve the conduction of the double-winding coil 20, and the outgoing line positions at the two sides of the first coil 21 and the second coil 22 are respectively provided with one insulation terminal 12 structure, so that the creepage distance of the reactor is effectively increased, and the designed reactor can bear higher lightning impulse voltage. In addition, the two coil receiving grooves 13 are respectively overlapped with the central axes of the two iron core mounting holes 14, and the first coil main body 211 and the second coil main body 221 are respectively received in the two coil receiving grooves 13, it is conceivable that the central axes of the first coil main body 211 and the second coil main body 221 are respectively overlapped with the central axes of the two coil receiving grooves 13, when the iron core 30 is inserted into the iron core mounting hole 14, the double-winding coil 20 is wrapped around the iron core 30, and the volume structure of the reactor is effectively reduced.

The transformer core commonly used for the core 30 is generally made of silicon steel sheet. The silicon steel is silicon-containing steel, and the silicon content of the silicon steel is 0.8-4.8%. The iron core of the transformer is made of silicon steel, because the silicon steel is a magnetic substance with strong magnetic conductivity, and in the electrified coil, the silicon steel can generate larger magnetic induction intensity, thereby reducing the volume of the transformer. In the processing process, epoxy resin is cast on the bifilar coil 20 to form the epoxy housing 10, and when the epoxy resin is cast on the bifilar coil 20, the first coil 21 and the second coil 22 in the bifilar coil 20 are provided with iron core 30 mounting positions, that is, the iron core mounting holes 14, so that the iron core 30 is inserted into the bifilar coil 20.

The elastic protection layer 40 is used for protecting the iron core 30, and in the processing process, the iron core 30 is accommodated in the iron core mounting hole 14, and is fixedly connected in the epoxy casing 10 by potting an elastomer material, that is, the iron core 30 is fixedly connected in the epoxy casing 10, so that the iron core 30 and the epoxy casing 10 form an integral structure, the position of the iron core 30 in the epoxy casing 10 is stable, and noise generated by the reactor in the use process is avoided.

Compared with the prior art, the compact anode saturable reactor provided by the invention has the advantages that the number of turns of the reactor coil is effectively increased through the structure of the first coil 21 and the second coil 22 of the double-winding coil 20. Moreover, the two insulating terminals 12 are disposed on the epoxy case 10, and the first connection line 212 and the second connection line 222 are respectively accommodated in the mounting holes 122 of the two insulating terminals 12, so that the first coil 21 and the second coil 22 are disposed on the insulating terminals 12, which effectively increases the creepage distance of the reactor and the capability of the reactor to bear the lightning impulse voltage. The two coil accommodating grooves 13 are respectively overlapped with the central axes of the two iron core mounting holes 14, the first coil main body 211 and the second coil main body 221 are respectively accommodated in the two coil accommodating grooves 13, and when the iron core 30 is inserted into the iron core mounting hole 14, the double-winding coil 20 is wrapped on the iron core 30, so that the volume structure of the reactor is reduced. The compact anode saturable reactor has the advantages of compact structure and small volume, and ensures the reliability of the reactor under higher lightning impulse voltage.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, and any modifications, equivalents or improvements that are within the spirit of the present invention are intended to be covered by the following claims.

Claims

1. A compact anode saturable reactor is characterized in that: the compact type anode saturable reactor comprises an epoxy shell, a bifilar coil arranged in the epoxy shell, an iron core arranged on the bifilar coil, an elastic protection layer arranged between the iron core and the epoxy shell, wherein the epoxy shell comprises a shell body, two insulating terminals symmetrically arranged at two sides of the shell body, two coil accommodating grooves symmetrically arranged in the shell body, and two iron core mounting holes arranged at intervals on the shell body, each insulating terminal comprises an insulating terminal body and a mounting hole arranged at the axial direction of the insulating terminal body, each mounting hole is communicated with one coil accommodating groove, the bifilar coil comprises a first coil and a second coil which are sequentially accommodated in the coil accommodating grooves, the first coil and the second coil are connected with each other, the first coil comprises a first coil main body and a first connecting wire arranged on the first coil main body, the second coil comprises a second coil main body and a second connecting wire arranged on the second coil main body, the first coil main body and the second coil main body are respectively accommodated in the two coil accommodating grooves, and the first connecting wire and the second connecting wire are respectively accommodated in the mounting holes of the two insulating terminals, so that the creepage distance of the reactor is increased.

2. The compact anode saturable reactor as set forth in claim 1, wherein: the epoxy shell is made of epoxy resin by casting.

3. The compact anode saturable reactor as set forth in claim 1, wherein: the shell body and the insulating terminal are integrally formed.

4. The compact anode saturable reactor as set forth in claim 1, wherein: the epoxy housing further includes a plurality of fixed inserts disposed on one side of the epoxy housing.

5. The compact anode saturable reactor as set forth in claim 1, wherein: the outer profile of the insulated terminal is tapered.

6. The compact anode saturable reactor as set forth in claim 1, wherein: the iron core is fixedly connected in the epoxy shell.

7. The compact anode saturable reactor as set forth in claim 1, wherein: the first coil and the second coil are integrally formed.

8. The compact anode saturable reactor as set forth in claim 1, wherein: the two coil accommodating grooves are respectively superposed with the central axes of the two iron core mounting holes.