CN215265866U

CN215265866U - Framework air gap transformer

Info

Publication number: CN215265866U
Application number: CN202121640160.4U
Authority: CN
Inventors: 范文明
Original assignee: Shandong Hesong Electronic Technology Co ltd
Current assignee: Shandong Hesong Electronic Technology Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-12-21
Anticipated expiration: 2031-07-19

Abstract

The utility model belongs to the technical field of transformers, in particular to a framework air gap transformer, which comprises an E-shaped magnetic core, an I-shaped magnetic core and a transformer framework; the transformer framework comprises a central column body and a winding baffle, the central column of the E-shaped magnetic core is inserted into the central column body, the transformer framework also comprises a gasket, a through hole is formed in the gasket, and the gasket is sleeved with the transformer framework through the through hole; stitch fixing blocks are fixed at two ends of the winding baffle positioned above, and supporting blocks for supporting the gasket are fixed at two ends of the winding baffle positioned below; the utility model discloses a skeleton air gap transformer through the gasket that sets up, can support E type magnetic core and I type magnetic core more steadily, under the prerequisite that does not change coil winding width, can effectively reduce the height of device, under the equal specification promptly, this skeleton air gap transformer product is shorter when satisfying the electrical characteristic, and is lighter-weight more, greatly reduced the use restriction, application scope is more extensive.

Description

Framework air gap transformer

Technical Field

The utility model belongs to the technical field of the transformer, concretely relates to skeleton air gap transformer.

Background

The transformer is a device for changing alternating voltage by utilizing the principle of electromagnetic induction, and main components are a primary coil, a secondary coil and an iron core (magnetic core), and the transformer has the main functions of: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), and the like, and transformers can be classified into: distribution transformers, power transformers, fully enclosed transformers, combined transformers, dry-type transformers, oil-immersed transformers, single-phase transformers, electric furnace transformers, rectifier transformers, reactors, anti-interference transformers, lightning protection transformers, box-type transformer test transformers, corner transformers, high current transformers, excitation transformers, etc.

The air gap is reserved on the transformer to prevent magnetic saturation in operation, the air gap is a gap reserved at the intersection of iron cores, the air gap is used for reducing magnetic permeability, the characteristic of the wire Wei is less dependent on the initial magnetic permeability of a magnetic core material, the air gap can avoid the magnetic saturation phenomenon under the condition of large alternating current signals or direct current bias, the inductance can be better controlled, however, the number of turns of a coil is required to be large under the condition that the magnetic permeability of the air gap is reduced, and related copper loss is increased.

In many power type magnetic components, such as flyback transformers, in order to prevent saturation of magnetic materials, that is, as the applied current increases, the magnetic field strength increases, and the magnetic induction strength of a magnetic component without an air gap increases rapidly to reach the saturation induction strength value of the magnetic materials, in this process, the magnetic permeability of the component decreases rapidly, that is, the inductance value decreases rapidly, the function of the transformer is lost, and simultaneously the function of other components is lost or damaged, and the method for preventing saturation of the transformer can be realized by increasing the air gap or the gap of the weak magnetic materials.

The common method is to obtain an air gap by processing a center pillar of a magnetic core, such as an EE magnetic core, but the volume of such a transformer becomes large, which not only increases the processing cost, but also greatly limits the use scenario.

SUMMERY OF THE UTILITY MODEL

For solving the above-mentioned problem that exists among the prior art, the utility model provides a skeleton air gap transformer has convenient to use and the extensive characteristics of application scope.

In order to achieve the above object, the utility model provides a following technical scheme: a framework air gap transformer comprises an E-shaped magnetic core, an I-shaped magnetic core and a transformer framework, wherein the E-shaped magnetic core and the I-shaped magnetic core are respectively arranged at two ends of the transformer framework; the transformer framework comprises a central column body with a hollow structure and used for winding a winding coil, two winding baffle plates connected to two ends of the central column body, and a gasket, wherein the middle column of the E-shaped magnetic core is inserted into the central column body; stitch fixing blocks are fixed at two ends of the winding baffle positioned above, and supporting blocks for supporting the gasket are fixed at two ends of the winding baffle positioned below; the width of the through hole is larger than that of the winding baffle plate and smaller than the distance between the far ends of the two stitch fixing blocks and the far ends of the two supporting blocks; a plurality of pins are fixed in the pin fixing block.

As an optimal technical scheme of the utility model, the E type magnetic core with the I type magnetic core passes through the support realization of gasket and keeps apart, forms the air gap.

As a preferred technical solution of the present invention, the bottom surface of the pin fixing block is flush with the bottom surface of the winding baffle plate located above; the top surface of the supporting block is flush with the top surface of the winding baffle positioned below.

As a preferred technical scheme of the utility model, two ends of the gasket are provided with two groups of symmetrically distributed supporting feet, and the supporting feet are in L-shaped structures; the same group of gaskets is symmetrically provided with two gaskets.

As an optimized technical scheme of the utility model, two of the same group the interval of gasket is greater than the length of supporting shoe.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a skeleton air gap transformer through the gasket that sets up, can support E type magnetic core and I type magnetic core more steadily, under the prerequisite that does not change coil winding width, can effectively reduce the height of device, under the equal specification promptly, this skeleton air gap transformer product is shorter when satisfying the electrical characteristic, and is lighter-weight more, greatly reduced the use restriction, application scope is more extensive.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side view of the present invention;

FIG. 3 is a schematic structural view of the spacer shaft side in the present invention;

in the figure: 1. an E-shaped magnetic core; 2. a type I magnetic core; 3. a transformer bobbin; 31. a winding baffle; 32. a central column; 33. a stitch fixing block; 34. a support block; 35. a stitch; 4. a gasket; 41. a through hole; 42. supporting feet; 5. an air gap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: a framework air gap transformer comprises an E-shaped magnetic core 1, an I-shaped magnetic core 2 and a transformer framework 3, wherein the E-shaped magnetic core 1 and the I-shaped magnetic core 2 are respectively arranged at two ends of the transformer framework 3; the transformer bobbin 3 includes a central cylinder 32 having a hollow structure and around which a winding coil is wound, and two winding baffles 31 connected to both ends of the central cylinder 32, and a center pillar of the E-shaped magnetic core 1 is inserted into the central cylinder 32;

as shown in fig. 1 and fig. 2, the transformer framework further includes a spacer 4, a through hole 41 is formed in the spacer 4, and the spacer 4 is sleeved with the transformer framework 3 through the through hole 41; stitch fixing blocks 33 are fixed at two ends of the winding baffle plate 31 positioned above, and supporting blocks 34 for supporting the gasket 4 are fixed at two ends of the winding baffle plate 31 positioned below; the width of the through hole 41 is greater than the width of the winding baffle plate 31 and less than the distance between the far ends of the two stitch fixing blocks 33 and the far ends of the two supporting blocks 34, before the E-shaped magnetic core 1 and the I-shaped magnetic core 2 are inserted into the transformer framework 3, the gasket 4 is inserted into the E-shaped magnetic core 1 and the I-shaped magnetic core 2 to support and isolate the E-shaped magnetic core 1 and the I-shaped magnetic core 2, and the width of the through hole 41 is greater than the width of the winding baffle plate 31 and less than the distance between the far ends of the two stitch fixing blocks 33 and the far ends of the two supporting blocks 34, so that the size of the through hole 41 is designed, the reliable installation of the gasket 4 can be ensured, the support and isolation of the E-shaped magnetic core 1 and the I-shaped magnetic core 2 can be reliably realized, meanwhile, the winding of a winding coil cannot be influenced, and the I-shaped magnetic core 2 is combined, so that the transformer is shorter in height and lighter on the premise of the same electrical characteristics;

as shown in fig. 1 and 2, a plurality of pins 35 are fixed in the pin fixing block 33.

Specifically, according to fig. 1, in the present embodiment, the E-shaped magnetic core 1 and the I-shaped magnetic core 2 are separated by the support of the spacer 4, so as to form the air gap 5, thereby preventing the transformer from being saturated.

Specifically, according to fig. 1 and fig. 2, in this embodiment, the bottom surface of the pin fixing block 33 is flush with the bottom surface of the winding baffle 31 located above, and is used for limiting the E-shaped magnetic core 1, so as to prevent the E-shaped magnetic core 1 from slipping during the processing and manufacturing process; the top surface of supporting shoe 34 flushes with the winding baffle 31 top surface that is located the below for carry on spacingly to I type magnetic core 2, avoid I type magnetic core 2 slippage in the manufacturing process.

Specifically, according to fig. 1, fig. 2 and fig. 3, in the present embodiment, two sets of symmetrically distributed supporting legs 42 are provided at two ends of the gasket 4, and the supporting legs 42 are in an "L" shape; two gaskets 4 in the same group are symmetrically arranged.

Specifically, according to fig. 1, fig. 2 and fig. 3, in the present embodiment, the distance between two pads 4 in the same group is greater than the length of the supporting block 34, so as to position and stabilize the installation of the pads 4 and ensure the stability of the pads 4.

By utilizing the gasket 4 installed in a separated mode, under the same specification, the framework air gap transformer product is shorter and lighter while the electrical characteristics are met, the use limit is greatly reduced, and the application range is wider.

The utility model discloses a theory of operation and use flow: the framework air gap transformer product of the utility model is characterized in that before the E-shaped magnetic core 1 and the I-shaped magnetic core 2 are inserted into the transformer framework 3, the gaskets 4 are inserted into the E-shaped magnetic core 1 and the I-shaped magnetic core 2 to support and isolate the E-shaped magnetic core 1 and the I-shaped magnetic core 2;

the width of through-hole 41 is greater than the width of winding baffle 31, be less than the interval between two stitch fixed block 33 distal ends and two supporting shoe 34 distal ends, consequently, the big small design of through-hole 41 can guarantee the reliable installation of gasket 4, and reliably realize the support and the isolation to E type magnetic core 1 and I type magnetic core 2, the winding of winding coil still can not be influenced simultaneously, combine I type magnetic core 2, make this transformer, the height under the prerequisite of equal electrical property is shorter, lighter-weighted more.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A framework air gap transformer comprises an E-shaped magnetic core (1), an I-shaped magnetic core (2) and a transformer framework (3), wherein the E-shaped magnetic core (1) and the I-shaped magnetic core (2) are respectively installed at two ends of the transformer framework (3); the transformer framework (3) comprises a central cylinder (32) with a hollow structure and used for winding a winding coil, and two winding baffles (31) connected to two ends of the central cylinder (32), wherein a middle column of the E-shaped magnetic core (1) is inserted into the central cylinder (32), and the transformer framework is characterized in that: the transformer framework is characterized by further comprising a gasket (4), wherein a through hole (41) is formed in the gasket (4), and the gasket (4) is sleeved with the transformer framework (3) through the through hole (41); stitch fixing blocks (33) are fixed at two ends of the winding baffle (31) positioned above, and supporting blocks (34) for supporting the gasket (4) are fixed at two ends of the winding baffle (31) positioned below; the width of the through hole (41) is larger than that of the winding baffle (31) and smaller than the distance between the far ends of the two pin fixing blocks (33) and the far ends of the two supporting blocks (34); a plurality of pins (35) are fixed in the pin fixing block (33).

2. The skeletal air-gap transformer of claim 1, wherein: the E-shaped magnetic core (1) and the I-shaped magnetic core (2) are separated through the support of a gasket (4), and an air gap (5) is formed.

3. The skeletal air-gap transformer of claim 1, wherein: the bottom surface of the pin fixing block (33) is flush with the bottom surface of the winding baffle (31) positioned above; the top surface of the supporting block (34) is flush with the top surface of the winding baffle (31) positioned below.

4. The skeletal air-gap transformer of claim 1, wherein: two ends of the gasket (4) are provided with two groups of symmetrically distributed supporting feet (42), and the supporting feet (42) are in L-shaped structures; two gaskets (4) in the same group are symmetrically arranged.

5. The skeletal air-gap transformer of claim 4, wherein: the distance between two gaskets (4) in the same group is larger than the length of the supporting block (34).