CN104332303A

CN104332303A - Winding method for inner coil of LLC (Logical Link Control) power transformer

Info

Publication number: CN104332303A
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: 2015-02-04
Anticipated expiration: 2034-10-31
Also published as: CN104332303B

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 transformer, the winding method of the current transformer interior loop of the leakage inductance between primary coil and secondary coil is: first on the skeleton axle of transformer, be wound with primary coil in turn, then in primary coil outer felt around the first insulating tape, then the first secondary coil is wound with in insulating tape outer felt, then in the first secondary coil outer felt around the second insulating tape, finally on the second insulating tape, be wound around second subprime coil.The shortcoming of this coil winding method is: on the one hand, because primary coil, the first secondary coil and second subprime coil successively distribute from inside to outside along the skeleton Axial and radial of transformer, cause to carry out fine adjustment to the leakage inductance between primary coil and secondary coil, one pair of magnetic core coiling resonant inductance separately need be set in power supply, be beneficial to this resonant inductance and carry out auxiliary adjustment leakage inductance, thus not only make power volume increase, and too increase enterprise's production and application cost; On the other hand, because the first secondary coil and the second subprime coil skeleton Axial and radial along transformer successively distributes from inside to outside, the length of second subprime coil is made often to be greater than the length of the first secondary coil, and then cause the consistency between the first secondary coil and second subprime coil poor, thus the work consistency of elementary upper and lower two power tubes cannot be ensured, thus bury hidden danger for the safe handling of circuit.

Summary of the invention

The object of this invention is to provide a kind of can fine adjustment leakage inductance and guarantee the winding method of secondary coil conforming LLC power transformer interior loop.

For achieving the above object, present invention employs following technical scheme: the winding method of described LLC power transformer interior loop, comprises the following steps: (1) is first wound the first insulation barricade at the centre position of transformer framework axle end control adhesive tape;

(2) the transformer framework axle then on the left of the first insulation barricade is wound around primary coil vertically in turn, when after the transformer framework axle that primary coil fills up on the left of the first insulation barricade, continuing primary coil to be walked around the first insulation barricade to the right arrives on the right side of the first insulation barricade, then by primary coil first insulation barricade on the right side of transformer framework axle on be wound around after again wraparound left first insulate barricade arrive first insulation barricade on the left of, then remaining primary coil is wrapped on the transformer framework axle on the left of the first insulation barricade;

(3) be then wound around parcel primary coil, the first insulation barricade and transformer framework with insulating tape, form the first insulating barrier;

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

(5) then by the first secondary coil and second subprime coil side by side and be axially wrapped on the first insulating barrier on the right side of the second insulation barricade in turn along transformer framework axle, when the first secondary coil and second subprime coil and around to a half of secondary number of total coils, by the first secondary coil and second subprime coil is interlaced changes over, then remaining interlaced the first secondary coil of changing over and second subprime coil are continued axially to be wrapped on the first insulating barrier on the right side of the second insulation barricade in turn along transformer framework axle;

(6) be finally wound around parcel first secondary coil, second subprime coil, the second insulation barricade and the first insulating barrier with insulating tape and form the second insulating barrier.

By the enforcement of technique scheme, the invention has the beneficial effects as follows: (1) this coil winding method just realizes the fine adjustment to leakage inductance by primary coil, thus need not in power supply, separately establish resonant inductance to carry out leakage inductance auxiliary adjustment, and then reduce power volume, reduce enterprise's production and application cost; (2) by the first secondary coil and second subprime coil adopted and around with the winding method interlocked, ensure that the consistency between the first secondary coil and second subprime coil, thus enable elementary upper and lower two power tubes have higher work consistency, add the reliability of power supply.

Embodiment

Below in conjunction with specific embodiment, the invention will be further described.

Embodiment one

For the LLC power transformer in AC220-DC60V power supply, the winding method of described LLC power transformer interior loop, comprises the following steps: (1) first holds control adhesive tape to be wound around 10 circle formation first at centre position 6mm of transformer framework axle to insulate barricade;

(2) the transformer framework axle then on the left of the first insulation barricade is wound around a 4 circles primary coil formed by 0.1*300 silk-covered wire vertically in turn, the transformer framework axle on the left of the first insulation barricade is just in time filled up when elementary coil winding 4 encloses, then continuing primary coil to be walked around the first insulation barricade to the right arrives on the right side of the first insulation barricade, then by primary coil first insulation barricade on the right side of transformer framework axle on be wound around 1 circle, by regulating the size of leakage inductance in the primary coil number of turns of right side coiling, the more leakage inductances of the primary coil number of turns of right side coiling are less, the fewer leakage inductance of the primary coil number of turns of right side coiling is larger, then continue by primary coil again wraparound left first insulate barricade arrive first insulation barricade on the left of, then by remaining primary coil first insulation barricade on the left of transformer framework axle on be wound around 3 circle,

(4) outside the first insulating barrier corresponding to transformer framework axle centre position, be wound around 10 circle formation second with the end control adhesive tape of 6mm again to insulate barricade;

(5) then by the first secondary coil and second subprime coil side by side and axially on the second the first insulating barrier insulated on the right side of barricade, be wound around 2 circles in turn along transformer framework axle, now, first secondary coils of winding 2 circle and second subprime coil just in time fill up the first insulating barrier on the right side of the second insulation barricade, then by the first secondary coil and second subprime coil is interlaced changes over, by the interlaced consistency ensureing leakage inductance to transferring of secondary two groups of coils; Then remaining interlaced the first secondary coil of changing over and second subprime coil are continued axially on the second the first insulating barrier insulated on the right side of barricade, to be wound around 2 along transformer framework axle to enclose;

(6) be finally wound around parcel secondary coil, the second insulation barricade and the first insulating barrier with insulating tape and form the second insulating barrier.

The advantage of the winding method of this LLC power transformer interior loop is: (1) this coil winding method just realizes the fine adjustment to leakage inductance by primary coil, thus need not in power supply, separately establish resonant inductance to carry out leakage inductance auxiliary adjustment, and then reduce power volume, reduce enterprise's production and application cost; (2) by the first secondary coil and second subprime coil adopted and around with the winding method interlocked, ensure that the consistency between the first secondary coil and second subprime coil, thus enable elementary upper and lower two power tubes have higher work consistency, add the reliability of power supply.

Claims

The winding method of 1.LLC power transformer interior loop, is characterized in that: comprise the following steps: (1) is first wound the first insulation barricade at the centre position of transformer framework axle end control adhesive tape;

(2) the transformer framework axle then on the left of the first insulation barricade is wound around primary coil vertically in turn, when after the transformer framework axle that primary coil fills up on the left of the first insulation barricade, continuing primary coil to be walked around the first insulation barricade to the right arrives on the right side of the first insulation barricade, then by primary coil first insulation barricade on the right side of transformer framework axle on be wound around after again wraparound left first insulate barricade arrive first insulation barricade on the left of, then remaining primary coil is wrapped on the transformer framework axle on the left of the first insulation barricade;

(3) be then wound around parcel primary coil, the first insulation barricade and transformer framework with insulating tape, form the first insulating barrier;

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

(5) then by the first secondary coil and second subprime coil side by side and be axially wrapped on the first insulating barrier on the right side of the second insulation barricade in turn along transformer framework axle, when the first secondary coil and second subprime coil and around to a half of secondary number of total coils, by the first secondary coil and second subprime coil is interlaced changes over, then remaining interlaced the first secondary coil of changing over and second subprime coil are continued axially to be wrapped on the first insulating barrier on the right side of the second insulation barricade in turn along transformer framework axle;

(6) be finally wound around parcel first secondary coil, second subprime coil, the second insulation barricade and the first insulating barrier with insulating tape and form the second insulating barrier.