CN215988364U

CN215988364U - Ultra-wideband compact transformer

Info

Publication number: CN215988364U
Application number: CN202122519252.3U
Authority: CN
Inventors: 卢成国; 徐明富
Original assignee: Hefei Kewei Power System Co ltd
Current assignee: Cowell Technology Co.,Ltd.
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-03-08
Anticipated expiration: 2031-10-19

Abstract

The utility model discloses an ultra-wideband compact transformer, which comprises two transverse iron cores, two vertical iron cores, a coil, clamping pieces and a screw rod, wherein the two vertical iron cores are arranged together in parallel, the upper side and the lower side of each vertical iron core are respectively provided with one transverse iron core, the two vertical iron cores are wound with one coil, the front sides and the rear sides of the two transverse iron cores and the top of the transverse iron core positioned above the vertical iron cores are respectively provided with the clamping pieces, the bottom of the transverse iron core positioned below the vertical iron cores are respectively provided with a bottom plate, the clamping pieces on the front sides and the rear sides of the two transverse iron cores are transversely locked and fixed through the screw rod, and the clamping pieces positioned at the top of the transverse iron cores, the clamping pieces positioned on the side surfaces of the transverse iron cores and the bottom plates are longitudinally locked and fixed through the screw rod; the transverse iron core and the vertical iron core are combined into a blocky structure by a plurality of super silicon steel sheets, and a micro air gap is formed between the transverse iron core and the vertical iron core; the utility model has the advantages that: simple structure, small volume and low cost, and meets the requirement of ultra-wide band.

Description

Ultra-wideband compact transformer

Technical Field

The utility model relates to the field of transformers, in particular to an ultra-wideband compact transformer.

Background

A transformer is a device for transforming ac voltage, current and impedance, and when an ac current flows through a primary winding, an ac magnetic flux is generated in an iron core (or a magnetic core), so that a voltage (or a current) is induced in a secondary winding. The transformer consists of an iron core (or a magnetic core) and a coil, and the coil has two or more windings. In a transformer, an electric potential is induced in a coil, whether the coil is moved through a magnetic field or the magnetic field is moved through a stationary coil, in both cases the value of the flux is constant, but the amount of flux linked to the coil varies, which is the principle of mutual induction. The transformer is a device for transforming voltage, current and impedance by utilizing the electromagnetic mutual inductance effect. Although there are many types of transformers on the market at present, most transformers have complex structures, large volumes and high cost, and cannot meet the requirements of ultra-wide frequency bands.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems that the transformer in the prior art is complex in structure, large in size, high in cost and incapable of meeting the requirement of an ultra-wide band.

The utility model solves the technical problems through the following technical means: the ultra-wideband compact transformer comprises two transverse iron cores, two vertical iron cores, a coil, clamping pieces and a screw rod, wherein the two vertical iron cores are arranged in parallel, the upper side and the lower side of each vertical iron core are respectively provided with one transverse iron core, the two vertical iron cores are wound with one coil, the front sides and the rear sides of the two transverse iron cores and the top of each transverse iron core above the vertical iron cores are respectively provided with the clamping pieces, the bottom of each transverse iron core below the vertical iron core is provided with a bottom plate, the clamping pieces on the front sides and the rear sides of the two transverse iron cores are transversely locked and fixed through the screw rod, and the clamping pieces on the top of each transverse iron core, the clamping pieces on the side surfaces of the transverse iron cores and the bottom plates are longitudinally locked and fixed through the screw rod; the transverse iron core and the vertical iron core are combined into a blocky structure by a plurality of super silicon steel sheets, and a micro air gap is formed between the transverse iron core and the vertical iron core.

The transformer body is designed by adopting the super silicon steel, the magnetic circuit introduces a micro air gap structure, the ultra-wide band coverage can be met, and the whole transformer body adopts two transverse iron cores and two vertical iron cores which are arranged in a laminated manner, so that the structure is compact, the size is small, and the cost is effectively reduced.

Further, the screw is a stainless steel screw.

Further, the solenoid includes the sharp magnetic wire and multilayer foil, the sharp magnetic wire is around vertical iron core coiling, and multilayer foil is along the overlapping coiling of the sharp magnetic wire outside.

Further, the clamping pieces comprise flat plates and side plates extending upwards from two opposite side edges of the flat plates, a groove shape is integrally formed, the flat plates of the clamping pieces positioned on the front side and the rear side of the two transverse iron cores are in contact with the transverse iron cores, the concave surfaces of the clamping pieces are outward, and the flat plates of the clamping pieces positioned on the tops of the transverse iron cores are in contact with the transverse iron cores, and the concave surfaces of the clamping pieces are outward.

The utility model has the advantages that:

(1) the transformer body is designed by adopting the super silicon steel, the magnetic circuit introduces a micro air gap structure, the ultra-wide band coverage can be met, and the whole transformer body adopts two transverse iron cores and two vertical iron cores which are arranged in a laminated manner, so that the structure is compact, the size is small, and the cost is effectively reduced.

(2) The transformer body effectively avoids the phenomenon of direct current magnetic biasing during working operation through a litz wire + multilayer foil winding structure and a single-layer tight coupling structure.

(3) The transformer body is connected with the clamping piece through the stainless steel screw rod, and the body has the advantages of low loss, low noise and high efficiency by utilizing the characteristic of non-magnetic conductivity of stainless steel.

Drawings

Fig. 1 is a schematic structural diagram of an ultra-wideband compact transformer according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an ultra-wideband compact transformer includes two horizontal iron cores 1, two vertical iron cores (not shown), a coil 2, clamps 3 and a screw rod 4, where the two vertical iron cores are arranged in parallel and two horizontal iron cores 1 are respectively arranged at the upper and lower sides, the two vertical iron cores are wound with the coil 2, the front and rear sides of the two horizontal iron cores 1 and the top of the horizontal iron core 1 above the vertical iron core are provided with the clamps 3, the bottom of the horizontal iron core 1 below the vertical iron core is provided with a bottom plate 5, the clamps 3 at the front and rear sides of the two horizontal iron cores 1 are transversely locked and fixed by the screw rod 4, and the clamp 3 at the top of the horizontal iron core 1, the clamp 3 at the side of the horizontal iron core 1 and the bottom plate 5 are longitudinally locked and fixed by the screw rod 4; the transverse iron core 1 and the vertical iron core are combined into a blocky structure by a plurality of super silicon steel sheets, and a micro air gap is formed between the transverse iron core 1 and the vertical iron core. The conventional transformer generally adopts cold-rolled non-oriented silicon steel sheets, and the utility model adopts a blocky structure combined by a plurality of super silicon steel sheets, adopts stack type assembly, has air gaps at seams, and can reduce impact current and iron core magnetic flux saturation under the condition of parallel direct current similar to a micro-air gap structure.

The screw rod 4 is a stainless steel screw rod 4, and the body has the advantages of low loss, low noise and high efficiency by utilizing the characteristic of non-magnetic conductivity of stainless steel.

The coil 2 comprises a litz wire (not shown) wound around the vertical core and a plurality of layers of foils (not shown) wound in an overlapping manner along the outer side of the litz wire. A plurality of single enameled wires with the same diameter are twisted together according to a certain direction and a certain rule by utilizing the characteristic of the litz wire, and then twisted into wire cores of various wire cables with different specifications of sections and different types. The method is suitable for occasions with higher working frequency and overlarge skin effect and proximity effect loss of single-strand wires. The litz wire can reduce the temperature of the running body, and has higher mechanical property and flexibility compared with a single-strand wire with the same sectional area. And the skin effect is also reduced by adopting multi-layer thin foil overlapping and winding.

The clamping piece 3 comprises a flat plate 31 and side plates 32 extending upwards from two opposite side edges of the flat plate 31, and the whole is in a groove shape, the flat plates 31 of the clamping pieces 3 positioned at the front side and the rear side of the two transverse iron cores 1 are in contact with the transverse iron cores 1, the concave surfaces of the flat plates 31 are outward, and the flat plates 31 of the clamping pieces 3 positioned at the top of the transverse iron cores 1 are in contact with the transverse iron cores 1, and the concave surfaces of the clamping pieces are outward.

It should be noted that, in practical application, a series-parallel connection mode enables a larger direct current to be superimposed for synchronous operation during alternating current operation, and thus, one device can really meet the working requirements of a plurality of original modules.

Through the technical scheme, the transformer body is designed by adopting the super silicon steel, the magnetic circuit introduces the micro air gap structure, the ultra-wide band coverage can be met, and the whole transformer adopts the laminated arrangement of the two transverse iron cores 1 and the two vertical iron cores, so that the structure is compact, the size is small, and the cost is effectively reduced.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The ultra-wideband compact transformer is characterized by comprising two transverse iron cores, two vertical iron cores, a coil, clamping pieces and a screw rod, wherein the two vertical iron cores are arranged in parallel, the upper side and the lower side of each vertical iron core are respectively provided with one transverse iron core, the two vertical iron cores are wound with one coil, the front sides and the rear sides of the two transverse iron cores and the top of each transverse iron core above the vertical iron core are respectively provided with the clamping pieces, the bottom of each transverse iron core below the vertical iron core is provided with a bottom plate, the clamping pieces on the front sides and the rear sides of the two transverse iron cores are fixed by transverse locking through the screw rod, and the clamping pieces on the top of each transverse iron core, the clamping pieces on the side surfaces of the transverse iron cores and the bottom plates are fixed by longitudinal locking through the screw rod; the transverse iron core and the vertical iron core are combined into a blocky structure by a plurality of super silicon steel sheets, and a micro air gap is formed between the transverse iron core and the vertical iron core.

2. The ultra-wideband compact transformer according to claim 1, wherein said screws are stainless steel screws.

3. The ultra-wideband compact transformer according to claim 1, wherein said coil comprises a litz wire wound around a vertical core and a plurality of layers of foils wound in superposition along the outside of the litz wire.

4. The ultra-wideband compact transformer according to claim 1, wherein said clamping members comprise flat plates and side plates extending upward from opposite side edges of the flat plates, and integrally formed in a groove shape, the flat plates of the clamping members located at the front and rear sides of the two lateral cores are in contact with the lateral cores with concave surfaces facing outward, and the flat plates of the clamping members located at the top of the lateral cores are in contact with the lateral cores with concave surfaces facing outward.