CN102737823A

CN102737823A - Transformer

Info

Publication number: CN102737823A
Application number: CN2011100862724A
Authority: CN
Inventors: 葛炽昌; 陶宇声; 简连甫
Original assignee: Huanyong Technology Co Ltd; Guolian Electronics (Shanghai) Co Ltd
Current assignee: Huanyong Technology Co Ltd; Guolian Electronics (Shanghai) Co Ltd; Ampower Technology Co Ltd
Priority date: 2011-04-07
Filing date: 2011-04-07
Publication date: 2012-10-17

Abstract

The invention provides a transformer, comprising a first iron core and a second iron core. The first core and the second iron core form a first winding area and a second winding area; the first winding area comprises a first primary winding and a first secondary winding; the second winding area comprises a second primary winding and a second secondary winding; and directions of magnetic circuits of the first winding area and the second winding area are opposite; the first primary winding, the second primary winding, the first secondary winding and the second secondary winding are wound around the second iron core. The transformer further comprises a magnetic element; and the magnetic element is located between the primary winding and the secondary winding in the winding area with a lower value of leakage inductance, so that the values of the leakage inductances of the first winding area and the second winding area are the same.

Description

Transformer

Technical field

The present invention relates to a kind of transformer, relate in particular to the transformer that a kind of volume is little and current balance type is effective.

Background technology

Existing transformer all require leakage inductance to want high, and the leakage inductance (abbreviation leakage inductance) of each group high-tension winding can be identical in order to make each lamp current can be identical.If but can't use if leakage inductance difference is excessive between the high pressure winding of transformer same transformer after production and assembly finish.To this problem, the solution that generally provides is to utilize the physical dimension of the first secondary winding/second subprime winding that strengthens elementary winding of low pressure and high pressure to increase leakage inductance, and simultaneously, the consistency of coiling also must precision control.Though it is less that the method can be kept the leakage inductance difference of high pressure winding, volume is bigger, and production efficiency is lower.

Summary of the invention

In view of this, the transformer that a kind of volume is little and current balance type is effective need be provided.

A kind of transformer; Comprise one first iron core and one second iron core; This first iron core and this second iron core form one first winding region and one second winding region; This first winding region comprises the first elementary winding and one first secondary winding, and this second winding region comprises one second elementary winding and a second subprime winding, and the magnetic circuit of this first, second winding region is in the opposite direction; This first, second elementary winding and this first, second secondary winding all are around in this second iron core; This transformer also comprises a magnetic element, between the elementary winding and secondary winding in the lower winding region of leakage inductance value, so that the leakage inductance of this first, second winding region value is identical.

Compared to prior art, transformer application magnetic element of the present invention improves the leakage inductance value between first winding region and second winding region, thereby reaches the effect of balanced balanced current, and compact conformation, and volume is little.

Description of drawings

The sketch map of the transformer that Fig. 1 provides for first embodiment of the invention.

The sketch map of the transformer that Fig. 2 provides for second embodiment of the invention.

The sketch map of the transformer that Fig. 3 provides for third embodiment of the invention.

The sketch map of the transformer that Fig. 4 provides for fourth embodiment of the invention.

The main element symbol description

Transformer 10,20,30,40

First iron core

12,43

Second iron core

14,24,34

First shunt 41

Second shunt 42

Magnetic element 46

The first winding region A1

The second winding region A2

The first elementary winding P1

The second elementary winding P2

The first secondary winding S1

Second subprime winding S2

The first magnetic circuit M1

The second magnetic circuit M2

Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.

Embodiment

Among all embodiment of the present invention; Iron core is contained in the drum stand (not shown); Elementary winding and secondary winding are wound in the corresponding zone of drum stand, and explanation is directly described iron core and is used to twine elementary winding and secondary winding for ease; Omission is to the description of drum stand, in this special instruction.

See also Fig. 1, the transformer 10 that first embodiment of the invention provides comprises one first iron core 12 and one second iron core 14.In the present embodiment, first iron core 12 is an E shape, and second iron core 14 is an I shape.For improving transformer performance, the electrical conductivity of first iron core 12 and second iron core 14 is differed more than 100 times, for example second iron core 14 of one of them can be selected the material of good insulation preformance; Simultaneously, for reducing cost, first iron core 12 can be selected material cheaply.In the present embodiment, first iron core 12 is the MnZn iron core, and second iron core 14 is good insulation preformance, high voltage withstanding nickel zinc-iron core.

This first iron core 12 forms one first winding region A1 and one second winding region A2 with this second iron core 14.This first winding region A1 comprises the first elementary winding P1 and one first secondary winding S1, and this second winding region A2 comprises one second elementary winding P2 and a second subprime winding S2.This first winding region A1 comprises the first magnetic circuit M1, and this second winding region comprises the second magnetic circuit M2.First, second magnetic circuit M1, M2's is in the opposite direction.

This first, second elementary winding P1, P2 and this first, second secondary winding S1, S2 all are around in this second iron core 14, and the direction of winding of this first, second elementary winding P1, P2 is opposite.

This transformer 10 also comprises a magnetic element 16, between the elementary winding and secondary winding in the lower winding region of leakage inductance value, so that the leakage inductance of this first, second winding region A1, A2 value is identical.In the present embodiment; Before putting into this magnetic element 16, measurement can know that the winding region that the leakage inductance value is lower is the first winding region A1 through three usefulness measuring instruments (LCR meter); Therefore; Can adopt anchor clamps such as clip that this magnetic element 16 is put between this first elementary winding P1 and the first secondary winding S1, on one side also can measure the leakage inductance value then, Yi Bian adjust the position of this magnetic element 16; The both sides leakage inductance is worth when identical up in certain position the time, around this magnetic element 16, put glue fixing in order to avoid move or come off.Because this first elementary winding P1 and the first secondary winding S1 are around in this second iron core 14, therefore, this magnetic element 16 is positioned at this second iron core 14.The size of magnetic element 16 and magnetic force size all can influence the adjustment capability of 16 pairs of monolateral leakage inductance values of magnetic element, can select the magnetic element 16 of suitable dimension and magnetic force according to actual conditions for use.

If before putting into this magnetic element 16, the winding region that the leakage inductance value is lower is the second winding region A2, and then this magnetic element 16 is between this first elementary winding P1 and the first secondary winding S1.

In the present embodiment, this magnetic element 16 is positioned at the center of the first magnetic circuit M1 on second iron core 14.Magnetic element 16 can be MnZn alloy (Mn-Zn) and nickel zinc (Ni-Zn) alloy.

See also Fig. 2, the transformer 20 that second embodiment of the invention provides is basic identical with transformer 10, and difference only is: magnetic element 26 is positioned at the inboard of the first magnetic circuit M1 of second iron core 24.

See also Fig. 3, the transformer 30 that third embodiment of the invention provides is basic identical with transformer 10, and difference only is: magnetic element 36 is positioned at the outside of the first magnetic circuit M1 of second iron core 34.

See also Fig. 4; The transformer 40 that fourth embodiment of the invention provides is basic identical with transformer 10; Difference only is: this transformer 40 also comprises 41 and one second shunts 42 of one first shunt (shunt); This first,

second shunt

41,42 lays respectively at first, second winding region A1, A2 is inner, and side-prominent to second iron core one.This first,

second shunt

41,42 and the spacing between this second iron core also can suitably be adjusted the leakage inductance of corresponding winding region.

The leakage inductance value that this first,

second shunt

41,42 lays respectively at first iron core, 43, the first winding regions is lower, so magnetic element 46 is between the first elementary winding P1, the first secondary winding S1.Similarly, magnetic element 46 can be positioned at center, inboard or the outside of the first magnetic circuit M1, the second magnetic circuit M2.Preferably, first shunt 41 is relative with this magnetic element 46.

The width of first,

second shunt

41,42 of the transformer 40 in the present embodiment is adjustable respectively, to regulate the electric current of two winding regions, further balance both sides electric current.

In above-mentioned each embodiment, the variable quantity of leakage inductance value is about 10% of monolateral leakage inductance value in 10mH.

The present invention's transformer is through the leakage inductance value between applied magnetic element balance first winding region and second winding region, thereby balanced balanced current promotes current stability.Because needn't change the volume of primary and secondary winding, so the compact conformation of whole transformer, volume is less.

Claims

1. transformer; Comprise one first iron core and one second iron core; This first iron core and this second iron core form one first winding region and one second winding region; This first winding region comprises the first elementary winding and one first secondary winding, and this second winding region comprises one second elementary winding and a second subprime winding, and the magnetic circuit of this first, second winding region is in the opposite direction; This first, second elementary winding and this first, second secondary winding all are around in this second iron core; It is characterized in that: this transformer also comprises a magnetic element, between the elementary winding and secondary winding in the lower winding region of leakage inductance value, so that the leakage inductance of this first, second winding region value is identical.

2. transformer as claimed in claim 1 is characterized in that, this first, second elementary winding and this first, second secondary winding all are around in this second iron core, and the direction of winding of this first elementary winding and this second elementary winding is opposite.

3. transformer as claimed in claim 2 is characterized in that, this magnetic element is positioned at this second iron core.

4. transformer as claimed in claim 1 is characterized in that, this transformer also comprises one first shunt and one second shunt, and this first, second shunt lays respectively at this first, second winding region.

5. transformer as claimed in claim 4 is characterized in that, this first, second shunt lays respectively at this first iron core.

6. transformer as claimed in claim 5 is characterized in that, this magnetic element is positioned at this second iron core, and relative with this first or second shunt.

7. transformer as claimed in claim 1 is characterized in that, this first iron core is the MnZn iron core, and this second iron core is a nickel zinc-iron core.

8. transformer as claimed in claim 1 is characterized in that the variable quantity of this leakage inductance value is in 10mH.

9. transformer as claimed in claim 1 is characterized in that, this first iron core is an E shape iron core, and this second iron core is an I shape iron core.

10. transformer as claimed in claim 1 is characterized in that, this magnetic element is fixed between the elementary winding and secondary winding in the lower winding region of leakage inductance value through a glue.