Utility model content
In view of above-mentioned analysis, the utility model embodiment proposes a kind of high frequency transformer, to solve existing three
The transformer loss that phase high frequency transformer uses is big, iron core quantity is more, wiring is complicated and bulky problem.
To achieve the above objectives, the present invention adopts the following technical solutions:
For the utility model in a first aspect, providing a kind of high frequency transformer, which includes: iron core, primary side winding
And vice-side winding;The iron core is the equilateral structure of triangle of integral type;The primary side winding and vice-side winding are uniformly around being set to
On three sides of the iron core, and primary side winding three-phase magnetic circuit is symmetrical.
With reference to first aspect, in first aspect first embodiment, the vice-side winding and the primary side winding are concentric
It is set around on the iron core, the primary side winding is set to the outside of the vice-side winding.
With reference to first aspect, in first aspect second embodiment, three angles of the iron core are arc-shaped structure.
First embodiment with reference to first aspect is set around the three of the iron core in first aspect third embodiment
The primary side winding on side is respectively used to three-phase input;The vice-side winding being set around on three sides of the iron core is
Serial or parallel connection structure is used for single-phase output.
With reference to first aspect, first aspect first embodiment, first aspect second embodiment or first aspect third
Embodiment, in the 4th embodiment of first aspect, the iron core includes: at least one second iron core.
4th embodiment with reference to first aspect, in the 5th embodiment of first aspect, when the iron core includes two
When the second iron core described above, closed assembly between each second iron core.
First embodiment, first aspect second embodiment or first aspect third embodiment with reference to first aspect,
In first aspect sixth embodiment, the material of the primary side winding and vice-side winding is copper foil or litz wire.
Technical solutions of the utility model at least have the advantages that compared with prior art
The utility model embodiment provides a kind of high frequency transformer, the high frequency transformer include: iron core, primary side winding and
Vice-side winding, iron core are the equilateral structure of triangle of integral type, and primary side winding and vice-side winding are uniformly around being set to three of iron core
Bian Shang, and primary side winding three-phase magnetic circuit is symmetrical, the fundametal compoment for avoiding high frequency transformer primary side be transmitted to secondary side and caused by
Loss, and due to only with a transformer, so that the loss of high frequency transformer is small, wiring is simple and small in size.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
As long as it should be noted that technical characteristic involved in the utility model different embodiments disclosed below
Not constituting a conflict with each other can be combined with each other.
The utility model embodiment provides a kind of high frequency transformer, as shown in Figure 1, the high frequency transformer includes: iron core
7, primary side winding 1, primary side winding 3, primary side winding 5, vice-side winding 2, vice-side winding 4 and vice-side winding 6;Iron core 7 is integral type
The equilateral structure of triangle;Primary side winding 1, primary side winding 3, primary side winding 5, vice-side winding 2, vice-side winding 4 and vice-side winding 6
Uniformly around being set on three sides of iron core 7, and primary side winding 1, primary side winding 3,5 three-phase magnetic circuit of primary side winding are symmetrical.
I.e. to realize primary side three-phase defeated only with a transformer for high frequency transformer provided by the embodiment of the utility model
It is symmetrical to enter magnetic circuit, three-phase shares a stem, and fluctuating power can flow between high frequency transformer primary side three-phase, and primary side three-phase is complete
Unity couping, fundametal compoment are completely counterbalanced by, and are avoided and are passed to the loss that secondary side causes high frequency transformer, wiring is simple, and small in size.
Meanwhile the iron core of high frequency transformer provided by the embodiment of the utility model uses integral structure, avoids use
Splice the air gap that iron core generates, reduces the leakage inductance and core loss of high frequency transformer, reduce the hot spot temperature of high frequency transformer
Degree, improves the operational efficiency and service life of high frequency transformer.
As shown in Figure 1, above-mentioned vice-side winding 2, vice-side winding 4, vice-side winding 6 respectively with above-mentioned primary side winding 1, primary side around
Group 3, primary side winding 5 be set around on iron core 7 with one heart, primary side winding 1, primary side winding 3, primary side winding 5 be respectively arranged at secondary side around
The outside of group 2, vice-side winding 4, vice-side winding 6.Primary side winding 1, primary side winding 3, primary side winding 5 respectively with vice-side winding 2, secondary
Side winding 4, the concentric winding of vice-side winding 6, increase the coefficient of coup between former vice-side winding, effectively reduce high frequency transformer
Leakage reactance between former pair side.Due to u=Ldi/dt, high frequency transformer provided by the embodiment of the utility model is accessed into current transformer,
Because the leakage reactance L between former pair side is reduced, it can reduce voltage spikes excessively high under access circuit medium-high frequency.
As depicted in figs. 1 and 2, three angles of above-mentioned iron core 7 are arc-shaped structure, on the one hand avoid 60 degree of angle needs
On the other hand the assembly used prevents iron core from embrittlement occurs;In addition, the straight length L on three side of iron core, core interior triangle circle
Angular radius R2, iron core external triangular radius of corner R1 need to be according between three windings of width and primary side of former vice-side winding
Insulating requirements etc. are comprehensive to be determined.
Reference data when as fabrication of iron core, as shown in Fig. 2, φ 1 is the straight of circle 8 where three-legged structure outside iron core
Diameter, φ 2 are the diameter of circle 9 where core interior three-legged structure.
As shown in figure 3, above-mentioned iron core 7 includes: at least one second iron core, when iron core includes more than two second iron cores
When, the strip width of each second iron core is h, and closed assembly between each second iron core avoids the air gap of iron core assembly generation, can
The leakage magnetic flux of high frequency transformer iron core is reduced, core loss is reduced.The determination of the overall height H of iron core need to comprehensively consider flux density, iron
The factors such as core loss, transformer temperature rise.
Optionally, in some embodiments of the utility model, above-mentioned iron core 7 be can be iron core band by iron core winder
Material rolls, and by annealing, iron core band can select different materials according to the difference of working frequency, such as can be with
It is ferrite, amorphous alloy, ultra-thin silicon steel or the magnetic materials such as nanocrystalline.
Optionally, in some embodiments of the utility model, as shown in Figure 4 A and 4 B shown in FIG., three of iron core 7 are set around
Primary side winding 1, primary side winding 3, primary side winding 5 on side can be respectively used to three-phase input, and every phase input includes that two terminals are (former
1 corresponding two terminal of side winding be A and X, 3 corresponding two terminals of primary side winding be B and Y, primary side winding 5 corresponding two
Terminal is C and Z);As shown in Figure 4 A and 4 B shown in FIG., vice-side winding 2 (a1-x1), the vice-side winding being set around on three sides of iron core 7
4 (a2-x2), vice-side winding 6 (a3-x3) can be serial or parallel connection structure, draw two terminals (two ends drawn when series connection
Son is respectively a and z, and two terminals drawn when in parallel are respectively a and x), realizes single-phase output.For high frequency square wave, three-phase phase
Position is consistent, senses the single-phase square wave of low-pressure side same-phase, realizes three-phase to single-phase transformation.Using the utility model embodiment
The high frequency transformer of offer simplifies wiring, while reducing required high frequency transformer during realizing that three phase transformations are single-phase
Quantity.
In a preferred embodiment, be the kelvin effect reduced under high frequency operating condition, using copper foil as above-mentioned primary side winding and
The material of vice-side winding, the material using copper foil as winding winding, reduces the difficulty of winding technique.
Optionally, in the other embodiments of the utility model, above-mentioned primary side winding and vice-side winding are also possible to Ritz
Line.
Optionally, it in some embodiments of the utility model, can be real using insulating paper, insulating oil or epoxy resin
Electrical isolation between existing former secondary side.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.