CN104332303B

CN104332303B - Winding method for inner coil of LLC (Logical Link Control) power transformer

Info

Publication number: CN104332303B
Application number: CN201410598671.2A
Authority: CN
Inventors: 严为人; 陈伯平
Original assignee: Zhangjiagang Huawei Electronics Co Ltd
Current assignee: Zhangjiagang Huawei Electronics Co Ltd
Priority date: 2014-10-31
Filing date: 2014-10-31
Publication date: 2017-04-26
Anticipated expiration: 2034-10-31
Also published as: CN104332303A

Abstract

The invention discloses a winding method for an inner coil of an LLC (Logical Link Control) power transformer. The method comprises the following steps: (1) arranging a first insulation retaining wall in the middle of a transformer framework shaft; (2) winding a primary coil on the transformer framework shaft on the left side of the first insulation retaining wall, winding the primary coil rightward across the first insulation retaining wall and winding the primary coil on the transformer framework shaft after the transformer framework shaft on the left side is filled up, and winding back in order to wind the remaining primary coil on the transformer framework shaft; (3) wrapping the primary coil with an insulation tape to form a first insulating layer; (4) arranging a second insulation retaining wall in the middle of the first insulating layer; (5) winding a first secondary coil and a second secondary coil together on the first insulating layer on the right side of the second insulation retaining wall, exchanging the first secondary coil and the second secondary coil in a staggered way after a half of the total secondary circle number is wound, and continually winding the remaining exchanged secondary coils on the first insulting layer; (6) wrapping the secondary coils with the insulation tape. The method has the advantage that the leakage inductance is adjusted accurately.

Description

The winding method of LLC power transformer interior loop

Technical field

The present invention relates to the winding method of LLC power transformer interior loop.

Background technology

In LLC power transformers, the coiling of the current transformator interior loop of leakage inductance between primary coil and secondary coil Method is：First primary coil is sequentially wound with the skeleton axle of transformator, then winding first is insulated on the outside of primary coil Adhesive tape, is then wound with the first secondary coil on the outside of insulating tape, and then winding second is insulated on the outside of the first secondary coil Adhesive tape, finally winds second subprime coil on the second insulating tape.The shortcoming of this coil winding method is：On the one hand, by In primary coil, the first secondary coil and second subprime coil successively it is distributed from inside to outside along the skeleton Axial and radial of transformator, Lead to not carry out accurate adjustment to the leakage inductance between primary coil and secondary coil, need to separately arrange in power supply one pair of magnetic core around Resonant inductance processed, beneficial to the resonant inductance auxiliary adjustment leakage inductance is carried out, and so as to increase not only power volume, and also increases enterprise Industry production and application cost；On the other hand, due to the first secondary coil and second subprime coil along transformator skeleton Axial and radial by Successively it is distributed from inside to outside, makes the length of second subprime coil commonly greater than the length of the first secondary coil, and then causes for the first time Concordance between level coil and second subprime coil is poor, so as to the work that cannot ensure primary upper and lower two power tubes is consistent Property, so as to hidden danger has been buried in the safe handling for circuit.

The content of the invention

It is an object of the invention to provide a kind of accurate adjustment leakage inductance and can guarantee that the conforming LLC power of secondary coil becomes The winding method of depressor interior loop.

For achieving the above object, present invention employs following technical scheme：Described LLC power transformer interior loop around Method processed, comprises the following steps：（1）First the centre position end control adhesive tape in transformer framework axle is wound the first insulation Barricade；

（2）Then primary coil is sequentially wound vertically on the transformer framework axle on the left of the first insulation barricade, originally After the transformer framework axle that level coil is filled up on the left of the first insulation barricade, primary coil is bypassed to the right the first insulation barricade for continuation The first insulation barricade right side is reached, is then wound on the transformer framework axle by primary coil on the right side of the first insulation barricade Afterwards again the insulation of wraparound to the left first barricade reaches the first insulation barricade left side, then remaining primary coil is wrapped in into first exhausted On transformer framework axle on the left of edge barricade；

（3）Then with insulating tape winding parcel primary coil, the first insulation barricade and transformer framework, first is formed exhausted Edge layer；

（4）Second is wound on the outside of the first insulating barrier corresponding to transformer framework axle centre position with end control adhesive tape Insulation barricade；

（5）Then the first secondary coil is axially sequentially wound side by side and along transformer framework axle with second subprime coil On the first insulating barrier on the right side of the second insulation barricade, when the first secondary coil is with second subprime coil and around to secondary number of total coils Half when, change over the first secondary coil is interlaced with second subprime coil, then will be remaining interlaced The first secondary coil for changing over continues axially sequentially to be wrapped in the second insulation along transformer framework axle with second subprime coil On the first insulating barrier on the right side of barricade；

（6）Finally with insulating tape winding the first secondary coil of parcel, second subprime coil, the second insulation barricade and first Insulating barrier forms the second insulating barrier.

By the enforcement of above-mentioned technical proposal, the invention has the beneficial effects as follows：（1）The coil winding method can be by primary Coil just realizes the accurate adjustment to leakage inductance, and from without separately setting resonant inductance in power supply leakage inductance auxiliary adjustment is carried out, and then Power volume is reduced, enterprise's production and application cost is reduced；（2）By the way that the first secondary coil and second subprime coil are adopted And around with winding method staggeredly, it is ensured that the concordance between the first secondary coil and second subprime coil so that primary Upper and lower two power tubes can have higher work concordance, increased the reliability of power supply.

Specific embodiment

With reference to specific embodiment, the invention will be further described.

Embodiment one

By taking the LLC power transformers in AC220-DC60V power supplys as an example, described LLC power transformer interior loop around Method processed, comprises the following steps：（1）First form the with the circle of 6mm ends control adhesive tape winding 10 in the centre position of transformer framework axle One insulation barricade；

（2）Then vertically sequentially winding 4 encloses one by 0.1* on the transformer framework axle on the left of the first insulation barricade The primary coil that 300 silk-covered wires are formed, the transformator bone just filled up on the left of the first insulation barricade when primary coil winding 4 is enclosed Frame axle, then continues to that primary coil is bypassed to the right the first insulation barricade arrival the first insulation barricade right side, then by primary line Winding 1 on the transformer framework axle enclosed on the right side of the first insulation barricade is enclosed, by adjusting in the primary coil number of turns of right side coiling The size of section leakage inductance, the more leakage inductances of the primary coil number of turns of right side coiling are less, the fewer leakage of the primary coil number of turns of right side coiling Sense is bigger, then continues to primary coil that again the barricade that insulate of wraparound to the left first reaches first and insulate barricade left side, then will be surplus Winding 3 on transformer framework axle of the remaining primary coil on the left of the first insulation barricade is enclosed；

（4）Again with the end control adhesive tape winding of 6mm on the outside of the first insulating barrier corresponding to transformer framework axle centre position 10 circles form the second insulation barricade；

（5）Then it is the first secondary coil is side by side and axially exhausted second along transformer framework axle with second subprime coil 2 circles are sequentially wound on the first insulating barrier on the right side of edge barricade, now, first secondary coil and second subprime coil of the circle of winding 2 The first insulating barrier just filled up on the right side of the second insulation barricade, it is then that the first secondary coil is interlaced with second subprime coil Change over, by the interlaced concordance for ensureing transferring leakage inductance of secondary two groups of coils；Then by remaining mutual friendship The first secondary coil that mistake changes over continues axially right in the second insulation barricade along transformer framework axle with second subprime coil Winding 2 on first insulating barrier of side is enclosed；

（6）Finally form second with insulating tape winding parcel secondary coil, the second insulation barricade and the first insulating barrier exhausted Edge layer.

The advantage of the winding method of this LLC power transformer interior loop is：（1）The coil winding method can be by primary line Circle just realizes the accurate adjustment to leakage inductance, and from without separately setting resonant inductance in power supply leakage inductance auxiliary adjustment is carried out, and then subtracts Little power volume, reduces enterprise's production and application cost；（2）By the way that the first secondary coil and second subprime coil are adopted simultaneously Around with winding method staggeredly, it is ensured that the concordance between the first secondary coil and second subprime coil so that in primary Lower two power tubes can have higher work concordance, increased the reliability of power supply.

Claims

The winding method of 1.LLC power transformer interior loop, it is characterised in that：Comprise the following steps：（1）First in transformator bone The centre position end control adhesive tape of frame axle is wound the first insulation barricade；

（2）Then primary coil is sequentially wound vertically on the transformer framework axle on the left of the first insulation barricade, when primary line After the transformer framework axle that circle is filled up on the left of the first insulation barricade, primary coil is bypassed to the right the arrival of the first insulation barricade for continuation First insulation barricade right side, after being then wound on the transformer framework axle by primary coil on the right side of the first insulation barricade again The insulation barricade of wraparound to the left first reaches the first insulation barricade left side, then remaining primary coil is wrapped in into the first insulation stop On transformer framework axle on the left of wall；

（3）Then with insulating tape winding parcel primary coil, the first insulation barricade and transformer framework, form first and insulate Layer；

（4）The second insulation is wound on the outside of the first insulating barrier corresponding to transformer framework axle centre position with end control adhesive tape Barricade；

（5）Then the first secondary coil and second subprime coil are axially sequentially wrapped in into the side by side and along transformer framework axle On the first insulating barrier on the right side of two insulation barricades, when the first secondary coil and second subprime coil and around to the one of secondary number of total coils When half, change over the first secondary coil is interlaced with second subprime coil, then interlaced exchange remaining First secondary coil of position continues axially sequentially to be wrapped in the second insulation barricade along transformer framework axle with second subprime coil On first insulating barrier on right side；

（6）Finally with insulating tape winding the first secondary coil of parcel, second subprime coil, the second insulation barricade and the first insulation Layer forms the second insulating barrier.