KR20110123083A

KR20110123083A - Planar transformer

Info

Publication number: KR20110123083A
Application number: KR1020100042526A
Authority: KR
Inventors: 김은수
Original assignee: 엘지이노텍 주식회사; 전주대학교 산학협력단
Priority date: 2010-05-06
Filing date: 2010-05-06
Publication date: 2011-11-14
Also published as: KR101105481B1

Abstract

The present invention provides a main body formed of a rectangular magnetic body, a rear step formed on the rear long side of the body, a front step formed on the front long side of the main body, and the rear step and the left center of the front step. A first step including a left step formed from the left short side of the main body and having a predetermined length, and a right step formed from the right short side of the main body at a right length at the right center of the rear step and the front step and spaced apart from the left step; A planar core, a primary winding disposed to surround the left side step and the right side step of the first plane core, a plurality of coils are stacked, and a first side disposed around the left side step of the first plane core on the primary winding One secondary winding, a plurality of coils are stacked, surrounding the right side step of the first planar core on the primary winding Provided is a planar transformer including a second secondary winding disposed to be spaced apart from the first secondary winding and a magnetic material having a rectangular shape, and including a second planar core disposed on the first secondary winding and the second secondary winding. .

Description

Planar Transformer

Embodiments relate to planar transformers.

Recently, a power supply employing a Switching Mode Power Supply (SMPS) has attracted attention, and such a Switching Mode Power Supply is a metal oxide semiconductor field effect transistor (MOS FET) or a bipolar junction transistor (MOS FET). Switching devices such as BJTs (bipolar junction transistors) and transformers are used to provide stable power.

On the other hand, as household appliances and the like have been developed in a trend of light and short, the switching mode power supply is also required to be slipped, and to reduce the volume of a transformer that occupies a large volume among the circuit components constituting the switching mode power supply. The transformer is in the spotlight.

However, the conventional planar transformer has a small leakage inductance and separately installs a leakage inductor externally or uses a core having a low permeability, so that the volume of the planar transformer becomes large or the manufacturing of the planar transformer is complicated.

The planar transformer according to the embodiment can sufficiently secure the leakage inductance inside the planar transformer even without separately employing a core having a low permeability.

The planar transformer according to the first embodiment includes a main body formed of a rectangular magnetic body, a rear stepped portion extending from the rear long side of the main body, a front stepped portion extending from the front long side of the main body, and the rear stepped portion and the front side. A left step formed in a left length of the main body from a left short side of the main jaw and a right length formed from a right short side of the main body in a right length of the rear step and the front step and spaced apart from the left step The first planar core including the stepped portion is formed by winding a plurality of coils, and the primary winding disposed around the left side step and the right side step of the first flat core between the rear step and the front step of the first planar core. A first second stacked with a plurality of coils and disposed on the primary winding to surround a left step of the first planar core; A plurality of coils are stacked, and a plurality of coils are stacked, and are formed of a second secondary winding and a rectangular magnetic body disposed on the primary winding and spaced apart from the first secondary winding to surround the right step of the first planar core. And a second planar core disposed on the first secondary winding and the second secondary winding.

The planar transformer according to the second embodiment includes a main body formed of a rectangular magnetic body, a first rear step extending from the left rear long side of the main body, a second rear step extending from the right rear long side of the main body, A first front step formed on the left front long side of the main body, a second front step formed on the right front long side of the main body, a left side of the main body at the center of the first rear step and the first front step A first step including a left step formed from a short side to a predetermined length, and a right step formed from the right short side of the main body at a center of the second rear step and the second front step and spaced apart from the left step; A planar core, formed by winding a plurality of coils, the first rear step and the second rear step, the first front step and the second front step yarn of the first flat core A primary winding disposed around the left step and the right step of the first planar core, and a plurality of coils are stacked, and a first winding arranged around the left step of the first planar core on the primary winding. Secondary windings, a plurality of coils are stacked, and formed on the primary windings of the second secondary windings and the rectangular magnetic body is disposed spaced apart from the first secondary windings surrounding the right step of the first planar core, And a second planar core disposed on the first secondary winding and the second secondary winding.

The planar transformer according to the third embodiment includes a main body formed of a rectangular magnetic body, a rear stepped portion extending from the rear long side of the main body, a front stepped portion extending from the front long side of the main body, and the rear stepped portion and the front side. A left step formed in a left length of the main body from a left short side of the main jaw and a right length formed from a right short side of the main body in a right length of the rear step and the front step and spaced apart from the left step A first planar core comprising a step and a central step formed between the left step and the right step, wherein a coil is formed by winding a plurality, and the first planar core between the rear step and the front step of the first planar core. Primary windings arranged surrounding the left step and the right step of, a plurality of coils are stacked, on the primary winding A first secondary winding surrounding a left step of the first planar core and disposed so as not to overlap the central step of the first planar core, a plurality of coils are stacked, and on the primary winding of the first planar core A second secondary winding and a rectangular magnetic body disposed around the right step and not overlapping with the central step of the first planar core; and a second secondary winding disposed on the first secondary winding and the second secondary winding. And planar cores.

The planar transformer according to the fourth embodiment includes a main body formed of a rectangular magnetic body, a first rear step extending from the left rear long side of the main body, a second rear step extending from the right rear long side of the main body, A first front step formed on the left front long side of the main body, a second front step formed on the right front long side of the main body, a left side of the main body at the center of the first rear step and the first front step A left step formed from a short side to a predetermined length, a right side step formed from a right short side of the main body at a center of the second rear step and the second front step, and spaced apart from the left step, and the left step And a first planar core comprising a central step formed between the right stepped jaw and a plurality of coils, the first post core of the first planar core A primary winding, a plurality of coils are stacked between the stepped portion, the second rear stepped portion, and the first front stepped portion and the second front stepped to surround the left side step and the right side step of the first planar core. A first secondary winding arranged around the left step of the first planar core and not overlapped with a central step of the first planar core, a plurality of coils are stacked, and the first plane on the primary winding It is formed of a second secondary winding and a rectangular magnetic body surrounding the right side step of the core and not overlapped with the central step of the first plane core, and are disposed on the first secondary winding and the second secondary winding. And a second planar core.

The planar transformer according to the fifth embodiment includes a first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, and a first extending from the front long side of the first body. A front left jaw, a first left step formed in a predetermined length from a left short side of the first main body at a left center of the first rear step and the first front step, the first rear step and the first front step A first planar core having a predetermined length from a right short side of the first main body at a right center and including a right stepped jaw spaced apart from the first left step, coils are formed by winding a plurality of the first planar core, A primary winding disposed between the first rear step and the first front step and surrounding the first left step and the first right step of the first planar core, a plurality of coils are stacked, and the fry A first secondary winding disposed around the first winding core of the first planar core and a plurality of coils are stacked on the primary winding, and the first right winding of the first planar core is surrounded on the primary winding. A second secondary winding disposed on the first secondary winding and spaced apart from the first secondary winding; A second rear step formed to extend, a second front step formed to extend to the front long side of the second body, and a left side of the second main step to the left center of the second front step and the second front step from the left short side of the second body; The second left step formed in the length of the, and the right rear side of the second rear step and the second front step has a predetermined length from the right short side of the second body And a second flat core including a stepped ally spaced in the second group jwabang stepped.

The planar transformer according to the sixth embodiment includes a first body formed of a rectangular magnetic body, an eleventh rear step extending from the left rear long side of the first body, and an extension from the right rear long side of the first body. A twelfth rear step, an eleventh front step extending from the left front long side of the first body, a twelfth front step extending from the right front long side of the first main body, the eleventh rear step and the first step 11 A first left step formed in the center of the front step from the left short side of the main body and a predetermined length from the right short side of the first main body in the center of the twelfth rear step and the 12th front step. And a first planar core, the first planar core including a first right step spaced apart from the first left step, and a plurality of coils wound thereon, the eleventh rear step of the first planar core and the twelfth Between the room step and the eleventh front step and the twelfth front step, a primary winding disposed around the first left step and the first right step of the first planar core, a plurality of coils are stacked, and the primary winding A first secondary winding disposed around the first left step of the first planar core, a plurality of coils are stacked on the primary winding, and the first right step of the first planar core surrounding the first right step A second secondary winding disposed to be spaced apart from the first secondary winding and the second secondary winding disposed on the first secondary winding and the second secondary winding, the second main body formed of a rectangular magnetic body, and extending to the left rear long side of the second main body; And the twenty-first rear step formed, the twenty-second rear step formed extending to the right rear long side of the second body, and the left front long side of the second main body A twenty-first front step, a twenty-second front step formed extending to the right front long side of the second body, and a twenty-first step from the left short side of the body to a predetermined length at the center of the twenty-first rear step and the twenty-first front step. A second left step, and a second right step formed in the center of the 22nd rear step and the 22nd front step from a right short side of the second body and spaced apart from the second left step. And two planar cores.

The planar transformer according to the seventh embodiment includes a first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, and a first extending from the front long side of the first body. A front left jaw, a first left step formed in a predetermined length from a left short side of the first main body at a left center of the first rear step and the first front step, the first rear step and the first front step The first right side stepped from the right short side of the first main body at a right center and spaced apart from the first left side step, and the first central stepped between the first left side step and the first right side step A first planar core comprising a plurality of coils is formed and wound, and between the first rear step and the first front step of the first planar core, the first left step and the first right side of the first planar core. A primary winding disposed around the jaw, a plurality of coils are stacked, surrounding the first left step of the first planar core on the primary winding, not overlapping the first central step of the first planar core. A first secondary winding arranged so that a plurality of coils are stacked, the first secondary winding of the first planar core is enclosed on the primary winding, and is not overlapped with the first central step of the first planar core. A second body disposed on the second secondary winding and the first secondary winding and the second secondary winding, the second main body formed of a rectangular magnetic body, a second rear step extending from the rear long side of the second main body, A second front stepped on the front long side of the second main body, and the left rear of the second main body at the left center of the second rear step and the second front step; The second left step formed from the side of the second left step, the second rear step and the right front of the second front step formed in the predetermined length from the right short side of the second body and spaced apart from the second left step And a second planar core comprising a second right step and a second central step formed between the second left step and the second right step.

The planar transformer according to the eighth embodiment includes a first body formed of a rectangular magnetic body, an eleventh rear step extending from a left rear long side of the first body, and a first transformer extending from a right rear long side of the first body. A twelve rear step, an eleventh front step extending from the left front long side of the first body, a twelfth front step extending from the right front long side of the first body, the eleventh rear step and the eleventh The first left step formed in the center of the front step from the left short side of the first body, and the predetermined length from the right short side of the first body in the center of the 12th rear step and the 12th front step. A first planar core, the first planar core being formed and spaced apart from the first left step, and a first central step formed between the first left step and the first right step; The work is formed by winding a plurality, and between the eleventh rear step and the twelfth rear step of the first planar core, the eleventh front step and the twelfth front step, the first left step of the first flat core and the first step. A primary winding disposed surrounding the right step, a plurality of coils are stacked, and the first left step of the first planar core is enclosed on the primary winding and overlaps the first central step of the first planar core The first secondary windings arranged so as not to be arranged, a plurality of coils are stacked, surrounding the first right step of the first planar core on the primary winding, so as not to overlap the first center step of the first planar core A second main body disposed on the second secondary winding, the first secondary winding and the second secondary winding, and formed of a rectangular magnetic material, and a left rear side of the second main body; A twenty-first rear step formed to extend to the twenty second rear step formed on the right rear long side of the second body; a twenty-first front step formed on the left front long side of the second body; and the second main body. A twenty-second front step which extends to the right front long side of the second trough; a second left step which is formed to have a predetermined length from the left short side of the second body at the center of the twenty-first rear step and the twenty-first front step; A second right step formed in the center of the rear step and the twenty-second front step from the right short side of the second main body and spaced apart from the second left step, the second left step and the second right step And a second planar core comprising a second central step formed therebetween.

The planar transformer according to the ninth embodiment includes a main body formed of a rectangular magnetic body, a rear stepped portion extending from the rear long side of the main body, a front stepped portion extending from the front long side of the main body, and the rear stepped portion and the front side. A left step formed in a left length of the main body from a left short side of the main jaw and a right length formed from a right short side of the main body in a right length of the rear step and the front step and spaced apart from the left step A first planar core including a step, a first lower secondary winding, a plurality of coils are stacked, the first lower secondary winding is disposed between the rear step and the front step of the first planar core surrounding the left step of the first planar core, Coils are stacked, and surrounds the right step of the first planar core between the rear step and the front step of the first planar core. The second lower secondary winding, which is spaced apart from the first lower secondary winding, is formed by winding a plurality of coils, and the left stepped and the right side of the first planar core on the first lower secondary winding and the second lower secondary winding A primary winding disposed around the step, a plurality of coils are stacked, a first upper secondary winding disposed around the left step of the first planar core, a plurality of coils are stacked on the primary winding, A second upper secondary winding and a quadrangular magnetic body disposed on the primary winding and spaced apart from the first upper secondary winding and surrounding the right step of the first planar core, wherein the first upper secondary winding and the first upper secondary winding are formed. And a second planar core disposed on the second upper secondary winding.

The planar transformer according to the tenth embodiment includes a main body formed of a rectangular magnetic body, a first rear step extending from a left rear long side of the main body, a second rear step extending from a right rear long side of the main body, A first front step formed on the left front long side of the main body, a second front step formed on the right front long side of the main body, a left side of the main body at the center of the first rear step and the first front step A first step including a left step formed from a short side to a predetermined length, and a right step formed from the right short side of the main body at a center of the second rear step and the second front step and spaced apart from the left step; Plane core, a plurality of coils are stacked, and surrounds the left step of the first planar core between the rear step and the front step of the first planar core A first lower secondary winding, and a plurality of coils stacked, and a first secondary secondary winding disposed to be spaced apart from the first lower secondary winding between the rear step of the first planar core and the front step. 2, the lower secondary winding, the primary coil is formed by winding a plurality of, the primary winding disposed on the first lower secondary winding and the second lower secondary winding surrounding the left step and the right step of the first planar core Coils are stacked, a first upper secondary winding disposed around the left step of the first planar core on the primary winding, a plurality of coils are stacked, and the first planar core of the first winding core A second upper secondary winding and a rectangular magnetic material are formed to surround the right step and spaced apart from the first upper secondary winding. And a second planar core disposed on the first upper secondary winding and the second upper secondary winding.

The planar transformer according to the eleventh embodiment includes a main body formed of a rectangular magnetic body, a rear stepped portion extending from the rear long side of the main body, a front stepped portion extending from the front long side of the main body, the rear stepped portion and the front side A left step formed in a left length of the main body from a left short side of the main jaw and a right length formed from a right short side of the main body in a right length of the rear step and the front step and spaced apart from the left step A first planar core comprising a step and a central step formed between the left step and the right step, a plurality of coils are stacked, and the left side of the first planar core between the rear step and the front step of the first planar core. A first lower secondary winding, a plurality of first lower secondary windings that surround the step and are not overlapped with the central step of the first planar core A second lower secondary winding in which work is stacked and surrounds the right side step of the first planar core between the rear step and the front step of the first planar core and is arranged so as not to overlap the central step of the first planar core. And a plurality of coils formed by winding a plurality of coils and surrounding the left side step and the right side step of the first planar core on the first lower secondary winding and the second lower secondary winding. And a first upper secondary winding, a plurality of coils, stacked on the primary winding, surrounding the left step of the first planar core, the first upper secondary winding disposed so as not to overlap the central step of the first planar core, and the primary A second upper three that surrounds the right side step of the first planar core on the winding and is not overlapped with the central step of the first plane core; And a second planar core formed on the secondary winding and the rectangular magnetic material and disposed on the first upper secondary winding and the second upper secondary winding.

The planar transformer according to the twelfth embodiment includes a main body formed of a rectangular magnetic body, a first rear step extending from the left rear long side of the body, a second rear step extending from the right rear long side of the main body, A first front step formed on the left front long side of the main body, a second front step formed on the right front long side of the main body, a left side of the main body at the center of the first rear step and the first front step A left step formed from a short side to a predetermined length, a right side step formed from a right short side of the main body at a center of the second rear step and the second front step, and spaced apart from the left step, and the left step And a first stepped core including a central step formed between the right stepped parts and a plurality of coils, and a first rear stepped part of the first planar cores. And a first lower secondary winding disposed between the second rear step and the first front step and the second front step and surrounding the left step of the first planar core and not overlapping the central step of the first planar core. Coils are stacked, and surround the right side step of the first planar core between the first rear step and the second rear step of the first planar core and the first front step and the second front step, and the first flat core The second lower secondary winding, the coil is formed by winding a plurality of second secondary secondary windings disposed so as not to overlap the central step of, the left step and the right step of the first planar core on the first lower secondary winding and the second lower secondary winding A primary winding disposed surrounding the plurality of coils, wherein a plurality of coils are stacked and surrounding the left step of the first flat core on the primary winding, and the first flat nose A first upper secondary winding disposed so as not to overlap the central step of the plurality of coils, a plurality of coils are stacked, surrounding the right step of the first planar core on the primary winding, and overlapping the central step of the first planar core The first upper secondary winding and the second upper secondary winding are formed of a magnetic material having a quadrangular shape so as not to include a second planar core disposed on the second upper secondary winding.

The planar transformer according to the thirteenth embodiment includes a first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, and a first extending from the front long side of the first body. A front left jaw, a first left step formed in a predetermined length from a left short side of the first main body at a left center of the first rear step and the first front step, the first rear step and the first front step A first planar core having a predetermined length from a right short side of the first main body at a right center and including a right stepped spaced apart from the first left stage, a plurality of coils are stacked, and a first of the first planar cores. A first lower secondary winding, a plurality of coils, which is disposed between the rear step and the first front step, surrounding the first left step of the first planar core, a plurality of coils are stacked and a first post of the first planar core A second lower secondary winding and a coil wound around the first right step of the first planar core and spaced apart from the first lower secondary winding between the step and the first front step, and formed by winding a plurality of coils; A primary winding disposed on the lower secondary winding and the second lower secondary winding and surrounding the first left step and the first right step of the first planar core, and a plurality of coils are stacked on the primary winding. A first upper secondary winding disposed around a first left step of the first planar core, a plurality of coils are stacked, and the first upper step surrounding the first right step of the first planar core on the primary winding A second upper secondary winding spaced apart from the secondary winding and disposed on the first upper secondary winding and the second upper secondary winding; A second main body formed of a magnetic body having a shape, a second rear step formed on the rear long side of the second body, a second front step formed on the front long side of the second body, and the second rear step A second left stepped portion formed at a left length of the second main body from a left short side of the second front step, and a right short side of the second main body at a right center of the second rear step and the second front step; And a second planar core formed to have a predetermined length and including a right stepped step spaced apart from the second left stepped step.

The planar transformer according to the fourteenth embodiment includes a first body formed of a rectangular magnetic body, an eleventh rear step extending from the left rear long side of the first body, and an extension from the right rear long side of the first body. A twelfth rear step, an eleventh front step extending from the left front long side of the first body, a twelfth front step extending from the right front long side of the first main body, the eleventh rear step and the first step 11 A first left step formed in the center of the front step from the left short side of the main body and a predetermined length from the right short side of the first main body in the center of the twelfth rear step and the 12th front step. And a first planar core comprising a first right step spaced apart from the first left step, a plurality of coils stacked, and an eleventh rear step and a twelfth rear end of the first planar core. A first lower secondary winding arranged around the first left step of the first planar core between the jaw, the eleventh front step and the twelfth front step, a plurality of coils are stacked, and an eleventh rear of the first planar core A plurality of second lower secondary windings and coils are disposed between the first lower secondary winding and the first lower secondary winding and spaced apart from the first lower secondary winding between the twelfth rear step and the eleventh front step and the twelfth front step. A primary winding formed around the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the first left step and the first right step of the first core, and a plurality of coils stacked thereon. And a first upper secondary winding and a plurality of coils disposed on the primary winding and surrounding the first left step of the first planar core. A second upper secondary winding disposed on a line and spaced apart from the first upper secondary winding and surrounding the first right step of the first planar core, and disposed on the first upper secondary winding and the second upper secondary winding; A second main body formed of a rectangular magnetic body, a twenty-first rear step formed on the left rear long side of the second body, a twenty-second rear step extended on the right rear long side of the second body, A twenty-first front step which extends to the left front long side of the second body, a twenty-second front step which extends to the right front long side of the second main body, and a center of the twenty-first rear step and the twenty-first front step A right left side of the second main body at the center of the second left left step and the twenty-second rear step and the twenty-second front step; Having a predetermined length and a second flat core including a second stepped ally spaced-apart on the second stepped jwabang.

A planar transformer according to a fifteenth embodiment includes a first body formed of a rectangular magnetic body, a first rear step extending from a rear long side of the first body, and a first extending from a front long side of the first body. A front left jaw, a first left step formed in a predetermined length from a left short side of the first main body at a left center of the first rear step and the first front step, the first rear step and the first front step The first right side stepped from the right short side of the first main body at a right center and spaced apart from the first left side step, and the first central stepped between the first left side step and the first right side step A first planar core comprising a plurality of coils stacked, surrounding the left step of the first planar core between the rear step and the front step of the first planar core, and the first planar core. The first lower secondary winding, a plurality of coils are stacked so as not to overlap the first central step, and surrounds the right step of the first planar core between the rear step and the front step of the first planar core, A second lower secondary winding disposed so as not to overlap the first central step of the first planar core, and a plurality of coils wound around the first lower core, and formed on the first lower secondary winding and the second lower secondary winding. A primary winding disposed around the left step and the right step, and a plurality of coils are stacked, and the left step of the first plane core is enclosed on the primary winding, and the first center step of the first plane core The first upper secondary winding, a plurality of coils are stacked so as not to overlap, the right side step of the first planar core on the primary winding A second upper secondary winding and the first upper secondary winding and the second upper secondary winding, the second upper secondary winding disposed so as not to overlap the first central step of the first planar core, and formed of a rectangular magnetic material. A second main body, a second rear step formed on the rear long side of the second body, a second front step formed on the front long side of the second body, the second rear step and the second front step A second left step formed in the left center of the second main body from the left short side and the predetermined length from the right short side of the second body in the right center of the second rear step and the second front step. And a second right side step spaced apart from the second left side step, and a second central step formed between the second left side step and the second right side step. Including ah.

The planar transformer according to the sixteenth embodiment includes a first body formed of a rectangular magnetic body, an eleventh rear step extending from a left rear long side of the first body, and a first transformer extending from a right rear long side of the first body. A twelve rear step, an eleventh front step extending from the left front long side of the first body, a twelfth front step extending from the right front long side of the first body, the eleventh rear step and the eleventh The first left step formed in the center of the front step from the left short side of the first body, and the predetermined length from the right short side of the first body in the center of the 12th rear step and the 12th front step. A first planar core, the first planar core being formed and spaced apart from the first left step, and a first central step formed between the first left step and the first right step; A plurality of coils are stacked, surrounding the first left step of the first planar core between the eleventh rear step and the twelfth rear step of the first planar core and the eleventh front step and the twelfth front step, A first lower secondary winding disposed so as not to overlap the first central step of the first planar core, a plurality of coils are stacked, and the eleventh rear step, the twelfth rear step, the eleventh front step and the twelfth of the first flat core A plurality of second lower secondary windings and coils wound between the front step and surrounding the first right step of the first planar core and disposed not to overlap the first center step of the first planar core, A primary winding and a plurality of coils are stacked on the first lower secondary winding and the second lower secondary winding to surround a first left step and a first right step of the first planar core. A first upper secondary winding, a plurality of coils, stacked on the primary winding, surrounding the first left step of the first planar core, the first upper secondary winding disposed so as not to overlap the first center step of the first planar core; A second upper secondary winding and the first upper secondary winding surrounding the first right step of the first planar core and not overlapping the first central step of the first planar core on the primary winding; A second main body disposed on the second upper secondary winding, a second main body formed of a rectangular magnetic body, a twenty-first rear step extending from a left rear long side of the second main body, and a right rear long side of the second main body; A twenty-second rear step formed, a twenty-first front step formed extending to the left front long side of the second body, and a right front long side of the second main body A second twenty-second front step formed in the center of the twenty-first front step and the twenty-first rear step and the left front side of the second main body from the left short side of the second main body, and the twenty-second rear step and the twenty-second step A second right side step formed from a right short side of the second main body at a center of the front step and spaced apart from the second left step, and a second center formed between the second left step and the second right step; And a second planar core comprising a step.

The planar transformer according to the embodiments can effectively secure and adjust a portion where the primary winding and the secondary winding are not intertwined, and thus have sufficient effect of sufficiently securing the leakage inductance inside the planar transformer even when a low permeability core is not separately employed. have.

1 is an exploded perspective view of a planar transformer according to a first embodiment of the present invention.
2 is a perspective view of a planar transformer according to a first embodiment of the present invention;
3 is an exploded perspective view of a planar transformer according to a second embodiment of the present invention.
4 is a perspective view of a planar transformer according to a second embodiment of the present invention;
5 is an exploded perspective view of a planar transformer according to a third embodiment of the present invention.
6 is a perspective view of a planar transformer according to a third embodiment of the present invention.
7 is an exploded perspective view of a planar transformer according to a fourth embodiment of the present invention.
8 is a perspective view of a planar transformer according to a fourth embodiment of the present invention.
9 is an exploded perspective view of a planar transformer according to a fifth embodiment of the present invention.
10 is a perspective view of a planar transformer according to a fifth embodiment of the present invention.
11 is an exploded perspective view of a planar transformer according to a sixth embodiment of the present invention.
12 is a perspective view of a planar transformer according to a sixth embodiment of the present invention.
13 is an exploded perspective view of a planar transformer according to a seventh embodiment of the present invention.
14 is a perspective view of a planar transformer according to a seventh embodiment of the present invention.
15 is an exploded perspective view of a planar transformer according to an eighth embodiment of the present invention.
16 is a perspective view of a planar transformer according to an eighth embodiment of the present invention.
17 is a perspective view illustrating various shapes of a left step, a right step, and a center step of a planar transformer according to embodiments of the present disclosure.
18 is an exploded perspective view of a planar transformer according to a ninth embodiment of the present invention.
19 is a perspective view of a planar transformer according to a ninth embodiment of the present invention.
20 is an exploded perspective view of a planar transformer according to a tenth embodiment of the present invention.
21 is a perspective view of a planar transformer according to a tenth embodiment of the present invention.
22 is an exploded perspective view of a planar transformer according to an eleventh embodiment of the present invention.
23 is a perspective view of a planar transformer according to an eleventh embodiment of the present invention.
24 is an exploded perspective view of a planar transformer according to a twelfth embodiment of the present invention.
25 is a perspective view of a planar transformer according to a twelfth embodiment of the present invention;
26 is an exploded perspective view of a planar transformer according to a thirteenth embodiment of the present invention.
27 is a perspective view of a planar transformer according to a thirteenth embodiment of the present invention;
28 is an exploded perspective view of a plane transformer according to a fourteenth embodiment of the present invention.
29 is a perspective view of a planar transformer according to a fourteenth embodiment of the present invention.
30 is an exploded perspective view of a planar transformer according to a fifteenth embodiment of the present invention.
31 is a perspective view of a planar transformer according to a fifteenth embodiment of the present invention;
32 is an exploded perspective view of a planar transformer according to a sixteenth embodiment of the present invention.
33 is a perspective view of a planar transformer according to a sixteenth embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 and 2, a planar transformer according to a first embodiment of the present invention will be described. FIG. 1 is an exploded perspective view of a planar transformer according to a first embodiment of the present invention, and FIG. A perspective view of a planar transformer according to the first embodiment.

As shown in FIG. 1, the first planar core 1100 includes a main body 1110 formed of a rectangular magnetic body, a rear step 1123 extending from a rear long side of the main body 1110, and a main body 1110 of the main plane 1110. The front step 1121 which is formed extending to the front long side, the left step 1113 formed in the predetermined length from the left short side of the main body 1110 at the left center of the rear step 1123 and the front step 1121, and the rear step 1123 and a right side step 1132 formed at a predetermined length from a right short side of the main body 1110 at the right center of the front step 1121 and spaced apart from the left step 1113, and the first planar core 1 1100, a rear step 1123, a front step 1121, a left step 1113, and a right step 1132 may be integrally formed with the main body 1110. On the other hand, the body 1110 may be a magnetic body of various shapes, such as rectangular, square, oval, circular, depending on the electronic product is employed.

The primary winding 1310 is formed in a K-shape by winding a plurality of coils, and the left step of the first planar core 1100 between the rear step 1123 and the front step 1121 of the first planar core 1100. 1113 is disposed surrounding the right stepped step 1132. Here, the primary winding 1310 may be formed in various shapes according to the shape or position of the left stepped 1131 and the right stepped 1132.

The first secondary windings 1411, 1412, 1413, and 1414 have a plurality of coils stacked thereon and are arranged on the primary winding 1310 to surround the left stepped 1131 of the first planar core 1100, and the second Secondary windings 1421, 1422, 1423, 1424 are stacked with a plurality of coils, surrounding the right side step 1132 of the first planar core 1100 on the primary winding, and the first secondary windings 1411, 1412, 1413. 1414).

The second planar core 1200 is formed of a magnetic material having a rectangular shape and is disposed on the first secondary windings 1411, 1412, 1413, and 1414 and the second secondary windings 1421, 1422, 1423, and 1424. Meanwhile, the second planar core 1200 may be formed of a magnetic material having various shapes such as rectangular, square, elliptical, and round depending on the electronic product.

As shown in FIG. 2, the planar transformer according to the first embodiment of the present invention includes a first planar core 1100, a primary winding 1310, a first secondary winding 1411, 1412, 1413, and 1414. A portion of the plane core 1200 overlaps the first transformer TR1, and the portion of the first plane core 1100, the primary winding 1310, and the second plane core 1200 overlap the leakage inductor ( Lr) and a second transformer at the portion where the first planar core 1100, the primary winding 1310, the second secondary windings 1421, 1422, 1423, 1424, and the second planar core 1200 overlap. It configures (TR2). Meanwhile, between the first core plane 1100 and the primary winding 1310, between the primary winding 1310 and the first secondary windings 1411, 1412, 1413, 1414, the primary winding 1310 and the second second. And between the windings 1421, 1422, 1423, 1424, between the first secondary windings 1411, 1412, 1413, 1414 and the second planar core 1200, and the second secondary windings 1421, 1422, 1423, 1424. It is necessary to insulate between the second planar cores 1200.

As described above, the leakage inductor Lr is formed at a portion where the first secondary windings 1411, 1412, 1413, and 1414 or the second secondary windings 1421, 1422, 1423, and 1424 are not interlinked with the primary windings 1310. Therefore, the planar transformer according to the first exemplary embodiment of the present invention may form the leakage inductor Lr in the planar transformer even without separately employing a core having a low permeability.

In addition, by adjusting the area of the portion where the first secondary windings 1411, 1412, 1413, 1414 and the second secondary windings 1421, 1422, 1423, 1424 are not bridged with the primary winding 1310, the leakage inductor ( Since the leakage inductance of Lr) can be adjusted, the planar transformer according to the first embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer.

On the other hand, the leakage inductance of the leakage inductor Lr can be adjusted by adjusting the length Icw11 and the height Ich11 of the left stepped 1131 and the right stepped 1132 of the first planar core 1100.

3 and 4, a planar transformer according to a second embodiment of the present invention will be described. FIG. 3 is an exploded perspective view of a planar transformer according to a second embodiment of the present invention. A perspective view of a planar transformer according to the second embodiment.

As shown in FIG. 3, the first planar core 2100 may include a main body 2110 formed of a rectangular magnetic body, a first rear step 2123 extending from a left rear long side of the main body 2110, and a main body ( A second rear step 2124 extending on the right rear long side of the main body 2110, a first front step 2121 extending on the left front long side of the main body 2110, and a right front long side of the main body 2110. A second front step 2122, a left rear step 2131 formed at a predetermined length from a left short side of the main body 2110 at a center of the first rear step 2123 and the first front step 2121, and And a right step 2132 formed at a predetermined length from a right short side of the main body 2110 at a center of the second rear step 2124 and the second front step 2122 and spaced apart from the left step 2131. The first planar core 2100 includes a first rear step 2123, a second rear step 2124, a first front step 2121, and a second front end. 2122, may be integrally formed on the stepped jwabang 2131 and ally stepped 2132 a main body 2110. On the other hand, the main body 2110 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

The primary winding 2310 is formed in a K-shape by winding a plurality of coils, and the first rear step 2123, the second rear step 2124, and the first front step 2121 of the first planar core 2100. The left stepped 2131 and the right stepped 2132 of the first planar core 2100 are disposed between the second front stepped 2122 and the second stepped 2132. Here, the primary winding 2310 may be formed in various shapes according to the shape or position of the left stepped 2131 and the right stepped 2132.

The first secondary windings 2411, 2412, 2413, and 2414 have a plurality of coils stacked thereon, and are arranged on the primary winding 2310 to surround the left step 2131 of the first planar core 2100. The second secondary windings 2421, 2422, 2423, and 2424 have a plurality of coils stacked thereon, surrounding the right side step 2132 of the first planar core 2100 on the primary winding 2310, and the first secondary winding 2411. , 2412, 2413, 2414, and spaced apart.

The second planar core 2200 is formed of a magnetic material having a rectangular shape and is disposed on the first secondary windings 2411, 2412, 2413, and 2414 and the second secondary windings 2421, 2422, 2423, and 2424. On the other hand, the second planar core 2200 may be a magnetic material having various shapes such as rectangular, square, elliptical, and circular, depending on the electronic product employed.

As shown in FIG. 4, the planar transformer according to the second embodiment of the present invention includes a first planar core 2100, a primary winding 2310, a first secondary winding 2411, 2412, 2413, and 2414. A portion of the planar core 2200 overlaps the first transformer TR1, and a portion of the first inductor core 2100, the primary winding 2310, and the second planar core 2200 overlaps the leakage inductor ( Lr) and a second transformer at the portion where the first planar core 2100, the primary winding 2310, the second secondary windings 2421, 2422, 2423, 2424 and the second planar core 2200 overlap. It configures (TR2). Meanwhile, between the first core plane 2100 and the primary winding 2310, between the primary winding 2310 and the first secondary winding 2411, 2412, 2413, and 2414, the primary winding 2310 and the second second. Between the windings 2421, 2422, 2423, 2424, between the first secondary windings 2411, 2412, 2413, 2414 and the second planar core 2200, and the second secondary windings 2421, 2422, 2423, 2424 It is necessary to insulate between the second planar cores 2200.

As described above, the leakage inductor Lr is formed at a portion where the first secondary windings 2411, 2412, 2413, 2414 or the second secondary windings 2421, 2422, 2423, and 2424 are not interlinked with the primary winding 2310. Therefore, the planar transformer according to the second exemplary embodiment of the present invention may form the leakage inductor Lr in the planar transformer even without separately employing a core having a low permeability.

In addition, the first secondary windings 2411, 2412, 2413, and 2414 or the second secondary windings 2421, 2422, 2423, and 2424 adjust the area of the portion where the primary windings 2310 are not interlinked with each other. Since the leakage inductance of Lr) can be adjusted, the planar transformer according to the second embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer.

Meanwhile, the length Iw1 between the first front step 2121 of the first planar core 2100 and the second front step 2122 of the first planar core 2100 or the first front core 2100 is formed. Adjust the length between the first rear step 2123 and the second rear step 2124 of the first flat core 2100, or the first front step 2121 and the first flat core of the first flat core 2100 ( The distance Ih1 between the second front step 2122 of the 2100 and the second planar core 2200 or the first rear step 2123 and the first plane core 2100 of the first planar core 2100. By adjusting the distance between the two rear steps 2124 and the second planar core 2200, the leakage inductance of the leakage inductor Lr may be adjusted.

The planar transformer according to the second embodiment of the present invention measures the length Iw1 between the first front step 2121 of the first planar core 2100 and the second front step 2122 of the first planar core 2100. By adjusting the length equal to the length between the first rear step 2123 of the first planar core 2100 and the second rear step 2124 of the first planar core 2100, the leakage inductance of the leakage inductor Lr is balanced. Can be adjusted.

In addition, the planar transformer according to the second embodiment of the present invention includes a second planar core between the first front step 2121 of the first planar core 2100 and the second front step 2122 of the first planar core 2100. An interval Ih1 of 2200 is between the first rear step 2123 of the first planar core 2100 and the second rear step 2124 of the first planar core 2100 and the second planar core 2200. By adjusting it equal to the interval of, it is possible to balance the leakage inductance of the leakage inductor Lr.

5 and 6, a planar transformer according to a third embodiment of the present invention will be described. FIG. 5 is an exploded perspective view of a planar transformer according to a third embodiment of the present invention. A perspective view of a planar transformer according to the third embodiment.

As shown in FIG. 5, the first planar core 3100 includes a main body 3110 formed of a rectangular magnetic body, a rear step 3123 extending from a rear long side of the main body 3110, and a main body 3110. A front step 3121 formed to extend in the front long side, a left step 3131 formed in a predetermined length from the left short side of the main body 3110 at the left center of the rear step 3123 and the front step 3121, and the rear step A right side step 3132 and a left side step 3131 and a right step formed at a predetermined length from the right short side of the main body 3110 at the right center of the 3123 and the front step 3121 and spaced apart from the left step 3131. And a central step 3140 formed between the 3132, and the first planar core 3100 includes a rear step 3123, a front step 3121, a left step 3131, a center step 3140, and a right step. 3132 may be integrally formed with the body 3110. On the other hand, the body 3110 may be a magnetic body of various shapes, such as rectangular, square, oval, circular, depending on the electronic product is employed.

The primary winding 3310 is formed in a K-shape by winding a plurality of coils, and the left step of the first planar core 3100 between the rear step 3123 and the front step 3121 of the first planar core 3100. It is disposed surrounding the right stepped step 3132. Here, the primary winding 3310 may be formed in various shapes according to the shape or position of the left step 3131 and the right step 3132.

The first secondary windings 3411, 3412, 3413, and 3414 have a plurality of coils stacked thereon, and surround the left step 3131 of the first planar core 3100 on the primary winding 3310. The second secondary windings 341, 3422, 3423, and 3424 are disposed not to overlap the central step 3140 of the planar core 3100, and a plurality of coils are stacked and a first plane is formed on the primary 3310 windings. It surrounds the right side step 3132 of the core 3100 and is disposed so as not to overlap the central step 3140 of the first planar core 3100.

The second planar core 3200 is formed of a magnetic material having a rectangular shape and is disposed on the first secondary windings 3411, 3412, 3413, and 3414 and the second secondary windings 3231, 3422, 3423, and 3424. On the other hand, the second planar core 3200 may be a magnetic material of various shapes, such as rectangular, square, oval, and circular, depending on the electronic product employed.

As shown in FIG. 6, the planar transformer according to the third embodiment of the present invention includes a first planar core 3100, a primary winding 3310, a first secondary winding 3411, 3412, 3413, and 3414. A portion of the planar core 3200 overlaps the first transformer TR1, and the portion of the first planar core 3100, the primary winding 3310, and the second planar core 3200 overlaps the leakage inductor ( Lr) and the second transformer at the portion where the first planar core 3100, the primary winding 3310, the second secondary windings 3321, 3422, 3423, 3424 and the second planar core 3200 overlap. It configures (TR2). Meanwhile, between the first core plane 3100 and the primary winding 3310, between the primary winding 3310 and the first secondary windings 3411, 3412, 3413, and 3414, the primary winding 3310 and the second second. And between the windings 3241, 3422, 3423, 3424, between the first secondary windings 3411, 3412, 3413, 3414 and the second planar core 3200, and the second secondary windings 341, 3422, 3423, 3424. It is necessary to insulate between the second planar cores 3200.

As described above, the leakage inductor Lr may be formed at a portion where the first secondary windings 3411, 3412, 3413, and 3414 or the second secondary windings 3231, 3422, 3423, and 3424 are not interlinked with the primary windings 3310. Therefore, the planar transformer according to the third exemplary embodiment of the present invention may form a leakage inductor Lr inside the planar transformer even if a core having a low permeability is not separately employed.

In addition, the first secondary windings 3411, 3412, 3413, and 3414 or the second secondary windings 341, 3422, 3423, and 3424 adjust the area of the portion where the first secondary windings 3411, 3422, 3423, and 3424 are not interlinked with the primary windings 3310. Since the leakage inductance of Lr) can be adjusted, the planar transformer according to the third embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer.

Alternatively, the leakage inductance of the leakage inductor Lr may be adjusted by adjusting the length Icw1 or the height Ich1 of the central step 3140 of the first planar core 3100.

7 and 8, a planar transformer according to a fourth embodiment of the present invention will be described. FIG. 7 is an exploded perspective view of the planar transformer according to the fourth embodiment of the present invention. A perspective view of a planar transformer according to the fourth embodiment.

As illustrated in FIG. 7, the first planar core 4100 includes a main body 4110 formed of a rectangular magnetic body, a first rear step 4123 formed extending from the left rear long side of the main body 4110, and a main body ( A second rear step 4124 extending to the right rear long side of the 4110, a first front step 4121 extending to the left front long side of the main body 4110, and a right front long side of the main body 4110. A left front step 4131 formed at a predetermined length from a left short side of the main body 4110 at the center of the second front step 4122, the first rear step 4123, and the first front step 4121, and A right side step 4132 formed at a predetermined length from a right short side of the main body 4110 at a center of the second rear step 4124 and the second front step 4122 and spaced apart from the left step 4131, and a left step step ( And a central step 4140 formed between the 4131 and the right step 4132, the first planar core 4100 being the first post. The step 4123, the second rear step 4124, the first front step 4121, the second front step 4122, the left step 4131, the center step 4140, and the right step 4132 are the main body 4110. It may be formed integrally with). On the other hand, the body 4110 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

The primary winding 4310 is formed in a K-shape by winding a plurality of coils, and the first rear step 4123, the second rear step 4124, and the first front step 4121 of the first planar core 4100. Between the second front step 4122 and the first step of the core 4100, the left step and the right step 4132 is disposed surrounding. Here, the primary winding 4310 may be formed in various shapes according to the shape or position of the left stepped 4131 and the right stepped 4132.

The first secondary windings 4411, 4412, 4413, and 4414 have a plurality of coils stacked thereon and surround the left side step 4131 of the first planar core 4100 on the primary winding 4310 and the first planar core. The second secondary windings 4421, 4422, 4423, and 4424 are disposed so as not to overlap the central step 4140 of the 4100, and a plurality of coils are stacked and the first planar core 4100 of the first flat core 4100 is stacked on the primary winding. It surrounds the right stepped 4132 and is disposed so as not to overlap the center step 4140 of the first planar core 4100.

The second planar core 4200 is formed of a magnetic material having a quadrangular shape and is disposed on the first secondary windings 4411, 4412, 4413, and 4414 and the second secondary windings 4421, 4422, 4423, and 4424. On the other hand, the second planar core 4200 may be a magnetic material having various shapes such as rectangular, square, elliptical, and circular, depending on the electronic product employed.

As shown in FIG. 8, the planar transformer according to the fourth embodiment of the present invention includes a first planar core 4100, a primary winding 4310, a first secondary winding 4411, 4412, 1413, and 4414. A portion of the planar core 4200 overlaps the first transformer TR1, and a portion of the first inductor core 4100, the primary winding 4310, and the second planar core 4200 overlaps the leakage inductor ( Lr) and a second transformer at the portion where the first planar core 4100, the primary winding 4310, the second secondary windings 4421, 4422, 4423, 4424 and the second planar core 4200 overlap. It configures (TR2). Meanwhile, between the first core plane 4100 and the primary winding 4310, between the primary winding 4310 and the first secondary winding 4411, 4412, 4413, and 4414, the primary winding 4310 and the second second. And between the windings 4421, 4422, 4423, 4424, between the first secondary windings 4411, 4412, 4413, 4414 and the second planar core 4200, and the second secondary windings 4421, 4422, 4423, 4424. It is necessary to insulate between the second planar cores 4200.

As described above, the leakage inductor Lr is formed at a portion where the first secondary windings 4411, 4412, 4413, 4414 or the second secondary windings 4421, 4422, 4423, 4424 are not bridged with the primary winding 4310. Therefore, the planar transformer according to the fourth exemplary embodiment of the present invention may form the leakage inductor Lr in the planar transformer even if a core having a low permeability is not separately employed.

In addition, the first secondary windings 4411, 4412, 4413, 4414 and the second secondary windings 4421, 4422, 4423, and 4424 adjust the area of the portion where the primary winding 4310 is not bridged with each other. Since the leakage inductance of Lr) can be adjusted, the planar transformer according to the fourth embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer.

On the other hand, the length Iw2 between the first front step 4121 of the first planar core 4100 and the second front step 4122 of the first planar core 4100, or the first of the first planar core 4100 Adjust the length between the first rear step 4123 and the second rear step 4124 of the first planar core 4100, or the first front step 4121 and the first planar core of the first planar core 4100 ( The distance Ih2 between the second front step 4122 of the 4100 and the second planar core 4200 or the first rear step 4123 and the first plane core 4100 of the first planar core 4100. By adjusting the distance between the two rear steps 4124 and the second planar core 4200, the leakage inductance of the leakage inductor Lr may be adjusted.

Alternatively, the leakage inductance of the leakage inductor Lr may be adjusted by adjusting the length Icw2 or the height Ich2 of the central step 4140 of the first planar core 4100.

The planar transformer according to the fourth embodiment of the present invention measures the length Iw2 between the first front step 4121 of the first planar core 4100 and the second front step 4122 of the first planar core 4100. By adjusting the length equal to the length between the first rear step 4123 of the first planar core 4100 and the second rear step 4124 of the first planar core 4100, the leakage inductance of the leakage inductor Lr is balanced. Can be adjusted.

In addition, the planar transformer according to the fourth embodiment of the present invention is provided between the first front step 4121 of the first planar core 4100 and the second front step 4122 of the first planar core 4100 and the second planar core. An interval Ih2 of 4200 is defined between the first rear step 4123 of the first planar core 4100 and the second rear step 4124 of the first planar core 4100 and the second planar core 4200. By adjusting it equal to the interval of, it is possible to balance the leakage inductance of the leakage inductor Lr.

9 and 10, a planar transformer according to a fifth embodiment of the present invention will be described. FIG. 9 is an exploded perspective view of a planar transformer according to a fifth embodiment of the present invention. A perspective view of a planar transformer according to a fifth embodiment of the present invention. Hereinafter, only differences from the planar transformer according to the first embodiment of the present invention will be described.

The second planar core 5200 is disposed on the first secondary windings 5411, 5412, 5413, and 5414 and the second secondary windings 5251, 5422, 5423, and 5424, and includes a second body formed of a rectangular magnetic body. 5210, a second rear step 5223 extending on the rear long side of the second body 5210, a second front step 5121 extending on the front long side of the second main body 5210, and a second The second left stepped 5231 and the second rear stepped 5223 and the second formed at a predetermined length from the left short side of the second main body 5210 at the left center of the rear step 5223 and the second front step 5121. 2 a right side stepped portion 5222 formed at a right length from the right short side of the second main body 5210 in the right center of the front stepped 5221 and spaced apart from the second left stepped 5231, and such a second planar core The 5200 may include a second rear step 5223, a second front step 5221, a second left step 5523, and a second right step 5523 integrally formed with the second body 5210. . On the other hand, the second body 5210 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

11 and 12, a description will be given of a planar transformer according to a sixth embodiment of the present invention, Figure 11 is an exploded perspective view of a planar transformer according to a sixth embodiment of the present invention, Figure 12 is a A perspective view of a planar transformer according to a sixth embodiment will be described below with respect to differences from the planar transformer according to the second embodiment of the present invention.

The second planar core 6200 is disposed on the first secondary windings 6411, 6412, 6413, and 6414 and the second secondary windings 6421, 6422, 6423, and 6424, and includes a second body formed of a rectangular magnetic body. 6210, a twenty-first rear stepping 6223 formed extending to the left rear long side of the second body 6210, a twenty-second rear stepping 6242 extending to the right rear long side of the second main body 6210, and Twenty-first front stepped 6221 formed extending to the left front long side of the second body 6210, twenty-second front stepped 2622 formed to extend to the right front long side of the second main body 6210, and the twenty-first rear step A second left stepped 6321 and a 22nd rear stepped 6224 and a twenty-second front stepped 6222 formed at a predetermined length from the left short side of the main body 6210 at the center of the 6223 and the twenty first front stepped 6221. The second right stepped step 2623 formed in the center of the second main body 6210 has a predetermined length from the right short side and is spaced apart from the second left stepped 6321. The second planar core 6200 may include a twenty-first rear step 6222, a twenty-second rear step 6242, a twenty-first front step 6241, a twenty-second front step 6162, and a second left step 6623. And a second right stepped 6322 may be integrally formed with the second body 6210. On the other hand, the second body 6210 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

13 and 14, a planar transformer according to a seventh embodiment of the present invention will be described. FIG. 13 is an exploded perspective view of a planar transformer according to a seventh embodiment of the present invention. A perspective view of a planar transformer according to a seventh embodiment, and hereinafter, only differences from the planar transformer according to the third embodiment of the present invention will be described.

The second planar core 7200 is disposed on the first secondary windings 7141, 7412, 7413, and 7414 and the second secondary windings 771, 7422, 7423, and 7424, and includes a second body formed of a rectangular magnetic body. 7210, a second rear step 7272 extending on the rear long side of the second body 7210, a second front step 7121 extending on the front long side of the second main body 7210, and a second In the left center of the rear step 7272 and the second front step 7141, a second left step 7141 formed in a predetermined length from the left short side of the second main body 7210, and the second rear step 7272 and the second step. The second right stepped 7222 and the second left stepped are formed to have a predetermined length from the right short side of the second main body 7210 at the right center of the second front step 7141 and spaced apart from the second left step 7141. 7231 and a second central step 7240 formed between the second right step 7222, the second planar core 7200 comprising a second rear step 7312, a second front end. The jaw 7221, the second left step 7321, the second center step 7240, and the second right step 7272 may be integrally formed on the second body 7210. On the other hand, the second body (7210) may be a magnetic body of various shapes, such as rectangular, square, oval, circular, depending on the electronic product is employed.

15 and 16, a planar transformer according to an eighth embodiment of the present invention will be described. FIG. 15 is an exploded perspective view of a planar transformer according to an eighth embodiment of the present invention. A perspective view of a planar transformer according to an eighth embodiment, which will be described below only with respect to the difference from the planar transformer according to the fourth embodiment of the present invention.

The second planar core 8200 is disposed on the first secondary windings 8111, 8412, 8413, 8414 and the second secondary windings 8421, 8422, 8423, 8424, and includes a second body formed of a rectangular magnetic body. 8210, a twenty-first rear step 823 extended to the left rear long side of the second body 8210, a twenty-second rear step 8242 extending to the right rear long side of the second main body 8210, and The twenty-first front step 821 extended to the left front long side of the second body 8210, the twenty-second front step 8222 extended to the right front long side of the second main body 8210, and the twenty-first rear step ( 8223 and the second left stepped 8231 formed at a predetermined length from the left short side of the second body 8210 at the center of the 21st front stepped 8221, the 22nd rear stepped 8224 and the 22nd front stepped ( The second right stepped 8232 formed in the center of the 8222 from the right short side of the second main body 8210 and spaced apart from the second left stepped 8321. And a second central stepping 8230 formed between the second left stepping 8321 and the second right stepping 8232, wherein the second planar core 8200 includes the twenty-first rear stepping 823 and the 22nd rear. The stepped 8224, the 21st front stepped 8221, the 22nd front stepped 8222, the second left stepped 8321, the second central stepped 8240 and the second right stepped 8232 are the second main body 8210. It may be formed integrally with). On the other hand, the second body 8210 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

As shown in FIG. 17, the left stepped 9913, the right stepped 9322, and the central step 9140 according to the exemplary embodiments of the present disclosure may be manufactured in various shapes such as an ellipse or a circular shape.

18 and 19, a planar transformer according to a ninth embodiment of the present invention will be described. FIG. 18 is an exploded perspective view of a planar transformer according to a ninth embodiment of the present invention. A perspective view of a planar transformer according to the ninth embodiment.

As shown in FIG. 18, the first planar core 11000 includes a main body 11100 formed of a rectangular magnetic body, a rear step 11230 extending from a rear long side of the main body 11100, and a main body 11100. The front step 1112, which extends to the front long side, and the rear step 1111 and the left step 1113 formed at a predetermined length from the left short side of the main body 1100 at the left center of the front step 11110, and the rear step 1230 and a right side of the front step 1112 is formed from a right short side of the main body 1100 to a predetermined length and comprises a right stepped step 1113 spaced apart from the left step 1113, such a first planar core ( 11000, the rear step 11110, the front step 1112, the left step 1113 and the right step 1113 may be integrally formed on the main body 1100. On the other hand, the main body 11100 may be a magnetic body of various shapes, such as rectangular, square, oval, circular, depending on the electronic product is employed.

The first lower secondary windings 14110 and 14120 are stacked with a plurality of coils, and are disposed to surround the left stepped 1113 of the first planar core between the rear step 11230 and the front step 1112 of the first planar core. The second lower secondary windings 1410 and 14220 may include a plurality of coils stacked and enclose the right step 1113 of the first planar core between the rear step 1230 and the front step 1112 of the first planar core. And spaced apart from the first lower secondary windings 14110 and 14120.

The primary winding 13100 has a coil wound around and is formed in a K-shape, and the left side step of the first planar core is formed on the first lower secondary windings 14110 and 14120 and the second lower secondary windings 14210 and 14220. 11310 and the right side stepped 1113 are disposed to surround. Here, the primary winding 13100 may be formed in various shapes according to the shape or position of the left stepped 1113 and the right stepped 1320.

The first upper secondary windings 14130 and 14140 are stacked with a plurality of coils, and are arranged on the primary winding 13100 to surround the left stepped 1113 of the first planar core, and the second upper secondary windings 14230, The 14240 is stacked with a plurality of coils and is spaced apart from the first upper secondary windings 14130 and 14140 on the primary winding 13100 to surround the right side step 1320 of the first planar core.

The second planar core 12000 is formed of a magnetic material having a rectangular shape and is disposed on the first upper secondary windings 14130 and 14140 and the second upper secondary windings 14230 and 14240. Meanwhile, the second planar core 12000 may be formed of a magnetic material having a rectangular shape, a square shape, an ellipse shape, a circular shape, and the like according to the electronic product to be employed.

As shown in FIG. 19, the planar transformer according to the ninth embodiment of the present invention includes a first planar core 11000, a first lower secondary winding 14110 and 14120, a primary winding 13100, and a first upper secondary winding. 14130, 14140 and the second planar core 12000 constitute a first transformer TR1 at an overlapping portion, and include the first planar core 11000, the primary winding 13100, and the second planar core 12000. The leakage inductor Lr constitutes an overlapped portion, and the first planar core 11000, the second lower secondary windings 14210 and 14220, the primary winding 13100, and the second upper secondary windings 14230 and 14240 are formed. And a second transformer TR2 at a portion where the second planar core 12000 overlaps. Meanwhile, between the first core plane 11000 and the first lower secondary windings 14110 and 14120, between the first lower secondary windings 14110 and 14120 and the primary winding 13100, the primary winding 13100 and the first Between the upper secondary windings 14130 and 14140, between the second lower secondary windings 14210 and 14220 and the primary winding 13100, between the primary winding 13100 and the second upper secondary winding, and the first upper secondary winding ( It is necessary to insulate between 14130 and 14140 and second planar core 12000 and between second upper secondary winding 14230 and 14240 and second planar core 12000.

As described above, the leakage inductor Lr includes the first lower secondary windings 14110 and 14120, the first upper secondary windings 14130 and 14140, the second lower secondary windings 14210 and 14220 or the second upper secondary windings 14230. Since the 14240 is configured in a portion that is not bridged with the primary winding 13100, the planar transformer according to the ninth embodiment of the present invention does not employ a core having a low permeability, but a leakage inductor Lr is formed inside the planar transformer. ) Can be formed.

In addition, the first lower secondary winding 14110, 14120, the first upper secondary winding 14130, 14140, the second lower secondary winding 14210, 14220, or the second upper secondary winding 14230, 14240 may be a primary winding. Since the leakage inductance of the leakage inductor Lr can be adjusted by adjusting the area of the portion not interlinked with the 13100, the planar transformer according to the ninth embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer. .

On the other hand, the leakage inductance of the leakage inductor Lr can be adjusted by adjusting the length Icw110 and the height Ich110 of the left stepped 1113 and the right stepped 1320 of the first planar core 11000.

20 and 21, a planar transformer according to a tenth embodiment of the present invention will be described. FIG. 20 is an exploded perspective view of a planar transformer according to a tenth embodiment of the present invention. A perspective view of a planar transformer according to a tenth embodiment.

As illustrated in FIG. 20, the first planar core 21000 may include a main body 21100 formed of a rectangular magnetic body, a first rear stepped 21230 extending from a left rear long side of the main body 21100, and a main body ( A second rear step 21240 formed to extend to the right rear long side of the 21100, a first front step 221210 formed to extend to the left front long side of the main body 21100, and a right front long side of the main body 21100. A left front stepped 21213 formed at a predetermined length from a left short side of the main body 21100 at a center of the second front stepped 21220, the first rear stepped 21230, and the first front stepped 221210, and In the center of the second rear step 21240 and the second front step 21220 is formed with a predetermined length from the right short side of the main body 21100 and includes a right step step 21320 spaced apart from the left step step 21110, and The first planar core 21000 may include a first rear step 21230, a second rear step 21240, and a first front step 2. 1210, the second front stepped 21220, the left stepped 21213, and the right stepped 21320 may be integrally formed with the main body 21100. On the other hand, the body 21100 may be a magnetic body of various shapes, such as rectangular, square, oval, circular, depending on the electronic product is employed.

The first lower secondary windings 24110 and 24120 have a plurality of coils stacked thereon, and the first rear step 21230 and the second rear step 21240 and the first front step 221210 and the second front of the first planar core. The stepped 21220 is disposed to surround the left stepped step 21213 of the first planar core, and the second lower secondary windings 24210 and 24220 are stacked with a plurality of coils, and the first rear stepped step of the first planar core ( 21230, the second rear step 21240, the first front step 221210, and the second front step 21220 surround the right step step 21320 of the first planar core and the first lower secondary winding 24110, 24120 is spaced apart.

The primary winding 23100 is formed in a K-shape by winding a plurality of coils, and the left side step of the first planar core on the first lower secondary windings 24110 and 24120 and the second lower secondary windings 24210 and 24220. It is disposed surrounding the 21310 and the right stepped jaw 21320. Here, the primary winding 23100 may be formed in various shapes depending on the shape or position of the left stepped step 21213 and the right stepped step 21320.

The first upper secondary windings 24130 and 24140 are stacked with a plurality of coils, and are arranged on the primary winding 23100 to surround the left step 21310 of the first planar core, and the second upper secondary winding 24230, The 24240 is stacked with a plurality of coils and is disposed on the primary winding 23100 to be spaced apart from the first upper secondary windings 24130 and 24140, surrounding the right side step 21320 of the first planar core.

The second planar core 22000 is formed of a magnetic material having a rectangular shape and is disposed on the first upper secondary windings 24130 and 24140 and the second upper secondary windings 24230 and 24240. In the meantime, the second planar core 22000 may be formed of a magnetic material having a rectangular shape, a square shape, an elliptical shape, a circular shape, and the like, depending on the electronic product.

As shown in FIG. 21, the planar transformer according to the tenth embodiment of the present invention includes a first planar core 21000, a first lower secondary winding 24110 and 24120, a primary winding 23100, and a first upper secondary winding. The first transformer TR1 constitutes a first transformer TR1 at a portion where the second and second planar cores 24130 and 24140 overlap each other, and the first planar core 21000, the primary winding 23100, and the second planar core 22000. Constitutes the leakage inductor Lr at the overlapped portion, and includes the first planar core 21000, the second lower secondary windings 24210 and 24220, the primary winding 23100, and the second upper secondary windings 24230 and 24240. And a second transformer TR2 at a portion where the second planar core 22000 overlaps. Meanwhile, between the first core plane 21000 and the first lower secondary windings 24110 and 24120, between the first lower secondary windings 24110 and 24120 and the primary winding 23100, the primary winding 23100 and the first Between the upper secondary windings 24130 and 24140, between the second lower secondary windings 24210 and 24220 and the primary winding 23100, between the primary winding 13100 and the second upper secondary windings 24230 and 24240, and It is necessary to insulate between the first upper secondary windings 24130 and 24140 and the second planar core 22000 and between the second upper secondary windings 24230 and 24240 and the second planar core 22000.

As described above, the leakage inductor Lr may include the first lower secondary windings 24110 and 24120, the first upper secondary windings 24130 and 24140, the second lower secondary windings 24210 and 24220, and the second upper secondary windings 24230. Since the 24240 is configured in a portion that is not bridged with the primary winding 23100, the planar transformer according to the tenth embodiment of the present invention does not employ a core having a low permeability, but a leakage inductor Lr is used inside the planar transformer. ) Can be formed.

In addition, the first lower secondary windings 24110 and 24120, the first upper secondary windings 24130 and 24140, the second lower secondary windings 24210 and 24220, and the second upper secondary windings 24230 and 24240 may be the primary windings. Since the leakage inductance of the leakage inductor Lr can be adjusted by adjusting the area of the portion not interlinked with the 23100, the planar transformer according to the tenth embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer. .

On the other hand, the length Iw10 between the first front step 221210 of the first planar core 21000 and the second front step 21220 of the first planar core 21000 or the first plane core 21000 Adjust the length between the first rear step 21230 and the second rear step 21240 of the first planar core 21000, or the first front step 221210 and the first flat core of the first planar core 21000 ( The distance Ih10 between the second front step 21220 of the 21000 and the second planar core 22000 or the first rear step 21230 and the first plane core 21000 of the first planar core 21000. By adjusting the distance between the two rear steps 21240 and the second planar core 22000, the leakage inductance of the leakage inductor Lr may be adjusted.

The planar transformer according to the tenth embodiment of the present invention measures the length Iw10 between the first front step 221210 of the first planar core 21000 and the second front step 21220 of the first planar core 21000. By adjusting the length equal to the length between the first rear step 21230 of the first planar core 21000 and the second rear step 21240 of the first planar core 21000, the leakage inductance of the leakage inductor Lr is balanced. Can be adjusted.

In addition, the planar transformer according to the tenth embodiment of the present invention includes a second plane between the first front step 221210 of the first planar core 21000 and the second front step 21220 of the first planar core 21000 and the second plane. The spacing Ih10 of the core 22000 is between the first rear step 21230 of the first planar core 21000 and the second rear step 21240 of the first planar core 21000 and the second planar core 22000. By adjusting the spacing equal to), it is possible to balance the leakage inductance of the leakage inductor Lr.

22 and 23, a planar transformer according to an eleventh embodiment of the present invention will be described. FIG. 22 is an exploded perspective view of the planar transformer according to the eleventh embodiment of the present invention. A perspective view of a planar transformer according to an eleventh embodiment.

As shown in FIG. 22, the first planar core 31000 includes a main body 31100 formed of a rectangular magnetic body, a rear step 31230 extending from a rear long side of the main body 31100, and a main body 31100. A front step 331210 extending to the front long side, a left step 331310 formed at a predetermined length from the left short side of the main body 31100 at the left center of the rear step 31230 and the front step 331210, and the rear step A right side step 331320 and a left side step 331310 formed at a predetermined length from a right short side of the main body 31100 at a right center of the front step 331210 and the front step 331210, and a left step 331310 and a right step And a central step 31400 formed between 331320 and the first planar core 31000 includes a rear step 3131, a front step 331210, a left step 331310, a center step 31400, and a right step. The 3313120 may be integrally formed with the main body 31100. On the other hand, the main body 31100 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

The first lower secondary windings 34110 and 34120 have a plurality of coils stacked thereon, and a first plane between the rear step 31230 and the front step 3310 of the first planar core 31000 on the primary winding 33100. It surrounds the left step 331310 of the core 31000 and is disposed so as not to overlap the center step 31400 of the first planar core 31000, and the second lower secondary windings 3410 and 34220 are stacked with a plurality of coils. Surrounds the right side step 3320 of the first planar core 31000 between the rear step 31230 and the front step 3310 of the first planar core 31000 on the winding of the primary 33100, The center core 31400 of the planar core 31000 is disposed so as not to overlap.

The primary winding 33100 is formed in a K-shape by winding a plurality of coils, and is formed on the first lower secondary windings 34110 and 34120 and the second lower secondary windings 3410 and 34220 of the first planar core 31000. It is disposed surrounding the left stepped 3313 and the right stepped 3313. Here, the primary winding 33100 may be formed in various shapes according to the shape or position of the left stepped 3313 and the right stepped 3313.

The first upper secondary windings 34130 and 34140 are stacked with a plurality of coils, and surround the left stepped 3313 10 of the first planar core 31000 on the primary winding 33100, and the first planar core 31000. The second upper secondary windings 34230 and 34240 are disposed so as not to overlap the central step 31400 of the plurality of coils, and a plurality of coils are stacked and the right side step of the first planar core 31000 on the primary 33100 winding ( 31320 is disposed so as not to overlap the central step 31400 of the first planar core 31000.

The second planar core 32000 is formed of a magnetic material having a rectangular shape and is disposed on the first upper secondary windings 34130 and 34140 and the second upper secondary windings 34230 and 34240. Meanwhile, the second planar core 32000 may be formed of a magnetic material having a rectangular shape, a square shape, an elliptical shape, a circular shape, and the like according to the electronic product to be employed.

As shown in FIG. 23, the planar transformer according to the eleventh embodiment of the present invention includes a first planar core 31000, a first lower secondary winding 34110 and 34120, a primary winding 33100, and a first upper secondary winding. 34130 and 34140 and the second planar core 32000 constitute a first transformer TR1 at an overlapping portion, and include the first planar core 31000, the primary winding 33100, and the second planar core 32000. Constitutes the leakage inductor Lr at the overlapped portion, and includes the first planar core 31000, the second lower secondary windings 3410 and 34220, the primary winding 33100, and the second upper secondary windings 34230 and 34240. And a second transformer TR2 at a portion where the second planar core 32000 overlaps. Meanwhile, between the first core plane 31000 and the first lower secondary windings 34110 and 34120, between the first lower secondary windings 34110 and 34120 and the primary winding 33100, the primary winding 33100 and the first Between the upper secondary windings 34130 and 34140, between the second lower secondary windings 3410 and 34220 and the primary winding 33100, between the primary winding 33100 and the second upper secondary windings 34230 and 34240, and It is necessary to insulate between the first upper secondary windings 34130 and 34140 and the second planar core 32000 and between the second upper secondary windings 34230 and 34240 and the second planar core 32000.

As described above, the leakage inductor Lr may include the first lower secondary windings 34110 and 34120, the first upper secondary windings 34130 and 34140, the second lower secondary windings 3410 and 34220, and the second upper secondary windings 34230. Since the 34240 is configured at a portion not bridged with the primary winding 33100, the planar transformer according to the eleventh embodiment of the present invention does not employ a core having a low permeability, but a leakage inductor Lr is formed inside the planar transformer. ) Can be formed.

In addition, the first lower secondary windings 34110 and 34120, the first upper secondary windings 34130 and 34140, the second lower secondary windings 3410 and 34220, and the second upper secondary windings 34230 and 34240 may be the primary windings. Since the leakage inductance of the leakage inductor Lr can be adjusted by adjusting the area of the portion not interlinked with the 33100, the planar transformer according to the eleventh embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer. .

Alternatively, the leakage inductance of the leakage inductor Lr may be adjusted by adjusting the length Icw10 or the height Ich10 of the central step 31400 of the first planar core 31000.

24 and 25, a description will be given of a planar transformer according to a twelfth embodiment of the present invention, Figure 24 is an exploded perspective view of a planar transformer according to a twelfth embodiment of the present invention, Figure 25 is a A perspective view of a planar transformer according to a twelfth embodiment.

As illustrated in FIG. 24, the first planar core 41000 includes a main body 41100 formed of a rectangular magnetic body, a first rear step 41230 extending from a left rear long side of the main body 41100, and a main body ( A second rear step 41240 extending from the right rear long side of the 41100, a first front step 41210 extending from the left front long side of the main body 41100, and a right front long side of the main body 41100. A left front step 41210 formed at a predetermined length from a left short side of the main body 41100 at a center of the second front step 41220, the first rear step 41230 and the first front step 41210, and A right side step 41320 formed at a right length from the right short side of the main body 41100 in the center of the second rear step 41240 and the second front step 412 20, and spaced apart from the left step 413 10, and the left step step ( 41310 and a central step 41400 formed between the right step 41413 and such a first planar nose The lower 41000 includes a first rear step 41230, a second rear step 41240, a first front step 41210, a second front step 41320, a left step 41413, a center step 41400, and a right side. The step 41320 may be integrally formed with the main body 41100. On the other hand, the main body 41100 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

The first lower secondary windings 44110 and 44120 have a plurality of coils stacked therein, and the first rear step 41230 and the second rear step 41240 and the first front step 4210 of the first planar core 41000. Between the second front step (41220), it is disposed so as not to overlap the central step (41400) of the first planar core (41000) surrounding the left step (41310) of the first planar core (41000), the second lower The secondary windings 4410 and 44220 have a plurality of coils stacked therebetween, and between the first rear step, the second rear step, the first front step and the second front step, the right step step 4413 of the first planar core 41000. It surrounds, and is disposed so as not to overlap the central step (41400) of the first planar core (41000).

The primary winding 43100 is formed in a K-shape by winding a plurality of coils, and is formed on the first lower secondary windings 44110 and 44120 and the second lower secondary windings 4410 and 44220 of the first planar core 41000. The left stepped 41101 and the right stepped 41413 are disposed to surround. Here, the primary winding 43100 may be formed in various shapes according to the shape or position of the left stepped 4413 and the right stepped 4413.

The first upper secondary windings 44130 and 44140 are stacked with a plurality of coils, surround the left stepped 41110 of the first planar core 41000 on the primary winding 43100, and the first planar core 41000. The second upper secondary windings 44230 and 44240 are disposed not to overlap the central step 41400 of the plurality of coils, and a plurality of coils are stacked, and the right stepped step 4413 of the first planar core 41000 is stacked on the primary winding. It encloses and is not overlapped with the central step 41400 of the first planar core 41000.

The second planar core 42000 is formed of a magnetic material having a rectangular shape and is disposed on the first upper secondary windings 44130 and 44140 and the second upper secondary windings 44230 and 44240. On the other hand, the second planar core 42000 may be a magnetic material having various shapes, such as rectangular, square, elliptical, and circular, depending on the electronic product employed.

As shown in FIG. 25, the planar transformer according to the twelfth embodiment of the present invention includes a first planar core 41000, a first lower secondary winding 44110 and 44120, a primary winding 43100, and a first upper secondary winding. A first transformer TR1 is formed at an overlapping portion of the 4444 and 44140 and the second planar core 42000, and the first planar core 41000, the primary winding 43100, and the second planar core 42000. The leakage inductor Lr is formed at the overlapping portion, and the first planar core 41000, the second lower secondary windings 444210 and 44220, the primary winding 43100, and the second upper secondary windings 44230 and 44240 are formed. And a second transformer TR2 at a portion where the second planar core 42000 overlaps. Meanwhile, between the first core plane 41000 and the first lower secondary windings 44110 and 44120, between the first lower secondary windings 44110 and 44120 and the primary winding 43100, the primary winding 43100 and the first Between the upper secondary windings 44130 and 44140, between the second lower secondary windings 4410 and 44220 and the primary winding 43100, between the primary winding 43100 and the second upper secondary windings 44230 and 44240, and It is necessary to insulate between the first upper secondary windings 44130 and 44140 and the second planar core 42000 and between the second upper secondary windings 44230 and 44240 and the second planar core 42000.

As described above, the leakage inductor Lr may include the first lower secondary windings 44110 and 44120, the first upper secondary windings 44130 and 44140, the second lower secondary windings 44210 and 44220, and the second upper secondary windings 44230. Since 44240 is configured at a portion that is not interlinked with the primary winding 43100, the planar transformer according to the twelfth embodiment of the present invention does not employ a core having a low permeability, but a leakage inductor Lr in the planar transformer is not employed. ) Can be formed.

In addition, the first lower secondary windings 44110 and 44120, the first upper secondary windings 44130 and 44140, the second lower secondary windings 44210 and 44220, and the second upper secondary windings 44230 and 44240 may be the primary windings. Since the leakage inductance of the leakage inductor Lr can be adjusted by adjusting the area of the portion not interlinked with 43100, the planar transformer according to the twelfth embodiment of the present invention can sufficiently secure the leakage inductance inside the planar transformer. .

On the other hand, the length Iw20 between the first front step 4210 of the first planar core 41000 and the second front step 4220 of the first planar core 41000 or the first flat core 41000 Adjust the length between the first rear step 41230 and the second rear step 41240 of the first flat core 41000, or the first front step 4210 and the first flat core of the first flat core 41000 ( The distance Ih20 between the second front step 421220 of the 41000 and the second planar core 42000 or the first rear step 41230 and the first plane core 41000 of the first planar core 41000. By adjusting the distance between the two rear steps 41240 and the second planar core 42000, the leakage inductance of the leakage inductor Lr may be adjusted.

Alternatively, the leakage inductance of the leakage inductor Lr may be adjusted by adjusting the length Icw20 and the height Ich20 of the central step 41400 of the first planar core 41000.

The planar transformer according to the twelfth embodiment of the present invention measures the length Iw20 between the first front stepped 4210 of the first planar core 41000 and the second front stepped 4220 of the first planar core 41000. By adjusting the length equal to the length between the first rear step 41230 of the first planar core 41000 and the second rear step 41240 of the first planar core 41000, the leakage inductance of the leakage inductor Lr is balanced. Can be adjusted.

In addition, the planar transformer according to the twelfth embodiment of the present invention includes a first planar core 41000 between the first front step 4210 and the second planar core 41000 between the second front step 4220 and the second planar core. The interval Ih20 of 42000 is between the first rear step 41230 of the first planar core 41000 and the second rear step 41240 of the first planar core 41000 and the second planar core 42000. By adjusting it equal to the interval of, it is possible to balance the leakage inductance of the leakage inductor Lr.

26 and 27, a planar transformer according to a thirteenth embodiment of the present invention will be described. FIG. 26 is an exploded perspective view of a planar transformer according to a thirteenth embodiment of the present invention. A perspective view of a planar transformer according to a thirteenth embodiment, and hereinafter, only differences from the planar transformer according to the ninth embodiment of the present invention will be described.

The second planar core 52000 is disposed on the first upper secondary windings 54130 and 54140 and the second upper secondary windings 553030 and 54240, and includes a second main body 52100 formed of a rectangular magnetic body and a second one. A second rear step 52230 extending from the rear long side of the body 52100, a second front step 5210 extending from the front long side of the second body 52100, and a second rear step 52230. The second left stepping jaw 52310 formed in a predetermined length from the left short side of the second main body 52100 at the left center of the second front stepping jaw 5210, the second rear stepping jaw 52230 and the second front stepping jaw 5210. The right center of the second main body 52100 has a predetermined length from the right short side of the right side and spaced apart from the second left step (52310), the second planar core 52000 is a second The rear step 52230, the second front step 5210, the second left step 552310, and the second right step 522320 work on the second body 52100. It may be formed from a. On the other hand, the second body 52100 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product employed.

28 and 29, a description will be given of a planar transformer according to a fourteenth embodiment of the present invention, Figure 28 is an exploded perspective view of a planar transformer according to a fourteenth embodiment of the present invention, Figure 29 is a A perspective view of a planar transformer according to a fourteenth embodiment, and hereinafter, only differences from the planar transformer according to the tenth embodiment of the present invention will be described.

The second planar core 62000 is disposed on the first upper secondary windings 64130 and 64140 and the second upper secondary windings 64230 and 64240, and includes a second main body 62100 formed of a rectangular magnetic material and a second one. The twenty-first rear step 62622 extended to the left rear long side of the body 62100, the twenty-second rear step 62240 formed to extend to the right rear long side of the second main body 62100, and the second main body 62100. A twenty-first front step 62210 formed to extend to the left front long side of the second body; a twenty-second front step 62622 formed to extend to the right front long side of the second body 62100; In the center of the front step (62210), the second left stepped (62310) formed in a predetermined length from the left short side of the main body 62100, the second in the center of the 22nd rear step (62240) and the 22nd front step (62220) The second right step 6 formed from the right short side of the main body 62100 and spaced apart from the second left step 662310. 2320, and the second planar core 62000 may include a twenty-first rear step 62230, a twenty-second rear step 62240, a twenty-first front step 62210, a twenty-second front step 22622, and a second left side. The stepped 6210 and the second right stepped 6320 may be integrally formed with the second body 62100. On the other hand, the second body 62100 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

30 and 31, a planar transformer according to a fifteenth embodiment of the present invention will be described. FIG. 30 is an exploded perspective view of a planar transformer according to a fifteenth embodiment of the present invention. A perspective view of a planar transformer according to a fifteenth embodiment, and hereinafter, only differences from the planar transformer according to the eleventh embodiment of the present invention will be described.

The second planar core 72000 is disposed on the first upper secondary windings 74130 and 74140 and the second upper secondary windings 7742 and 74240, and includes a second main body 72100 formed of a rectangular magnetic body and a second one. A second rear step 72230 extending on the rear long side of the main body 72100, a second front step 72210 extending on the front long side of the second main body 72100, and a second rear step 72230; The second left step 72310 and the second rear step 72230 and the second front step 72210 formed at a left length of the second main body 72100 at a left center of the second front step 72210. The second right stepped 7220 and the second left stepped 7210 and the second right side are formed in a right length from the right short side of the second main body 72100 to be spaced apart from the second left stepped 7210. A second central step 7200 formed between the steps 7220, and the second planar core 72000 includes a second rear step 7722, 2 may be integrally formed on the front stepped (72 210), the second stepped jwabang (72 310), a second central stepped (72400) and a second stepped ally (72 320), the second body (72100). On the other hand, the second body (72100) may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

32 and 33, a planar transformer according to a sixteenth embodiment of the present invention will be described. FIG. 32 is an exploded perspective view of a planar transformer according to the sixteenth embodiment of the present invention. A perspective view of a planar transformer according to a sixteenth embodiment, and hereinafter, only differences from the planar transformer according to the twelfth embodiment of the present invention will be described.

The second planar core 82000 is disposed on the first upper secondary windings 84130 and 84140 and the second upper secondary windings 84230 and 84240, and includes a second main body 82100 and a second main body formed of a rectangular magnetic body. The twenty-first rear step 82230 formed on the left rear long side of the 82100, the twenty-second rear step 82240 formed on the right rear long side of the second body 82100, and the second main body 82100. The twenty-first front step 8210, which extends to the left front long side, the twenty-second front step 82220 that extends to the right front long side of the second body 82100, and the twenty-first rear step 82230 and the twenty-first front The second left stepped 82310 formed at a predetermined length from the left short side of the second body 82100 at the center of the stepped 82210, and the center of the 22nd rear stepped 82240 and the 22nd front stepped 82220. 2 The second right end formed from a right short side of the main body 82100 and spaced apart from the second left step 8282. And a second central step 82400 formed between the jaw 82320 and the second left step 8282 and the second right step 82320, and the second planar core 82000 includes the twenty-first rear step 82230. ), The twenty-second rear step 82240, the twenty-first front step 82210, the twenty-second front step 82220, the second left step 8282, the second center step 82400, and the second right step 8282 It may be integrally formed with the second body 82100. On the other hand, the second body 82100 may be a magnetic body of various shapes, such as rectangular, square, elliptical, circular, depending on the electronic product is employed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Rather, those skilled in the art will appreciate that many modifications and variations of the present invention are possible without departing from the spirit and scope of the appended claims.

Accordingly, all such suitable changes and modifications and equivalents should be considered to be within the scope of the present invention.

Claims

A main body formed of a rectangular magnetic body, a rear step extending from the rear long side of the main body, a front step extending from the front long side of the main body, and a left side of the main left side of the rear step and the front step A first planar core comprising a left step formed from a short side to a predetermined length, and a right step formed from a right short side of the main body at a right center of the rear step and the front step and spaced apart from the left step;
A primary winding formed by winding a plurality of coils and disposed between the rear step and the front step of the first planar core and surrounding the left step and the right step of the first planar core;
A first secondary winding having a plurality of coils stacked thereon and disposed on the primary winding and surrounding a left step of the first planar core;
A second secondary winding in which a plurality of coils are stacked and disposed on the primary winding, the second secondary winding surrounding the right step of the first planar core and spaced apart from the first secondary winding; And
And a second planar core disposed on the first secondary winding and the second secondary winding.

The method of claim 1,
And the first planar core has the rear step, the front step, the left step, and the right step formed integrally with the main body.

The method of claim 1,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

The method of claim 1,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

A main body formed of a rectangular magnetic body, a first rear step formed extending to the left rear long side of the main body, a second rear step formed extending to the right rear long side of the main body, and extended to the left front long side of the main body A first front step formed, a second front step extending from the right front long side of the main body, and a left step step formed from the left short side of the main body to a predetermined length at the center of the first rear step and the first front step And a first planar core formed in a center of the second rear step and the second front step from a right short side of the main body and having a right step spaced apart from the left step.
A coil is formed by winding a plurality, and surrounds the left side step and the right side step of the first planar core between the first rear step, the second rear step, the first front step and the second front step of the first planar core. Placed primary windings;
A first secondary winding having a plurality of coils stacked thereon and disposed on the primary winding and surrounding the left step of the first planar core;
A second secondary winding in which a plurality of coils are stacked and disposed on the primary winding, the second secondary winding surrounding the right step of the first planar core and spaced apart from the first secondary winding; And
And a second planar core disposed on the first secondary winding and the second secondary winding.

The method of claim 5,
And the first planar core has the first rear step, the second rear step, the first front step, the second front step, the left step, and the right step integrally formed in the main body.

The method of claim 5,
The length between the first front step of the first planar core and the second front step of the first planar core is equal to the length between the first rear step of the first plane core and the second rear step of the first plane core. Same planar transformer.

The method of claim 5,
The distance between the first front step of the first planar core and the second front step of the first planar core and the second planar core is equal to the first rear step of the first planar core and the second of the first planar core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

The method of claim 5,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

The method of claim 5,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

A main body formed of a rectangular magnetic body, a rear step extending from the rear long side of the main body, a front step extending from the front long side of the main body, and a left side of the main left side of the rear step and the front step A left step formed from a short side to a predetermined length, a right side step formed from a right short side of the main body at a right center of the rear step and the front step and spaced apart from the left step, the left step and the right side A first planar core comprising a central step formed between the steps;
A primary winding formed by winding a plurality of coils and disposed between the rear step and the front step of the first planar core and surrounding the left step and the right step of the first planar core;
A first secondary winding on which a plurality of coils are stacked, surrounding a left step of the first planar core on the primary winding, and disposed not to overlap the center step of the first planar core;
A second secondary winding in which a plurality of coils are stacked, surrounding a right side step of the first planar core on the primary winding, and disposed not to overlap the central step of the first plane core; And
And a second planar core disposed on the first secondary winding and the second secondary winding.

The method of claim 11,
And the first planar core has the rear step, the front step, the left step, the center step, and the right step formed integrally with the main body.

The method of claim 11,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

The method of claim 11,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

The method of claim 11,
The center step of the first planar core is a planar transformer formed in a rectangular shape.

The method of claim 11,
The center step of the first planar core is an elliptical shape or a circular transformer formed in a circular shape.

A main body formed of a rectangular magnetic body, a first rear step formed extending to the left rear long side of the main body, a second rear step formed extending to the right rear long side of the main body, and extended to the left front long side of the main body A first front step formed, a second front step extending from the right front long side of the main body, and a left step step formed from the left short side of the main body to a predetermined length at the center of the first rear step and the first front step And a right side jaw formed at a right length from the right side of the main body at a center of the second rear step and the second front step and spaced apart from the left step, and a central step formed between the left step and the right step. A first planar core comprising a;
A coil is formed by winding a plurality, and surrounds the left side step and the right side step of the first planar core between the first rear step, the second rear step, the first front step and the second front step of the first planar core. Placed primary windings;
A first secondary winding on which a plurality of coils are stacked, surrounding a left step of the first planar core on the primary winding, and disposed not to overlap the center step of the first planar core;
A second secondary winding in which a plurality of coils are stacked, surrounding a right side step of the first planar core on the primary winding, and disposed not to overlap the central step of the first plane core; And
And a second planar core disposed on the first secondary winding and the second secondary winding.

The method of claim 17,
The first planar core is a planar transformer in which the first rear step, the second rear step, the first front step, the second front step, the left step, the central step, and the right step are integrally formed in the main body. .

The method of claim 17,
The length between the first front step of the first planar core and the second front step of the first planar core is equal to the length between the first rear step of the first plane core and the second rear step of the first plane core. Same planar transformer.

The method of claim 17,
The distance between the first front step of the first planar core and the second front step of the first planar core and the second planar core is equal to the first rear step of the first planar core and the second of the first planar core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

The method of claim 17,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

The method of claim 17,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

The method of claim 17,
The center step of the first planar core is a planar transformer formed in a rectangular shape.

The method of claim 17,
The center step of the first planar core is an elliptical shape or a circular transformer formed in a circular shape.

A first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, a first front step extending from the front long side of the first body, and the first rear step And a first left step formed in a left length of the first main body at a left center of the first front step, and a right length of the first main step in the right center of the first rear step and the first front step. A first planar core formed from a short side to a predetermined length and including a right side step spaced apart from the first left side step;
A primary winding formed by winding a plurality of coils and disposed between the first rear step and the first front step of the first planar core and surrounding the first left step and the first right step of the first planar core;
A first secondary winding having a plurality of coils stacked thereon and disposed on the primary winding and surrounding the first left step of the first planar core;
A second secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the first right step of the first planar core and spaced apart from the first secondary winding; And
A second main body disposed on the first secondary winding and the second secondary winding, formed of a rectangular magnetic body, a second rear step extending from a rear long side of the second main body, and the front of the second main body; A second front stepped on a long side, a second left stepped to a predetermined length from a left short side of the second main body at a left center of the second rear step and the second front step, and the second rear step And a second planar core formed at a right center of the second front step from a right short side of the second body and having a right step spaced apart from the second left step.

The method of claim 25,
And the first planar core has the first rear step, the first front step, the first left step and the first right step integrally formed with the first body.

The method of claim 25,
And the second planar core has the second rear step, the second front step, the second left step and the second right step integrally formed in the second body.

The method of claim 25,
And a first left step or a first right step of the first planar core having a rectangular shape.

The method of claim 25,
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

The method of claim 25,
And a second left step or second right step of the second planar core has a quadrangular shape.

The method of claim 25,
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

A first main body formed of a rectangular magnetic body, an eleventh rear step extending from the left rear long side of the first body, a twelfth rear step extending from the right rear long side of the first main body, and the first An eleventh front step formed on the left front long side of the main body, a twelfth front step formed on the right front long side of the first main body, and a center of the eleventh rear step and the eleventh front step The first left step formed from the left short side and the predetermined length, the center of the twelfth rear step and the 12th front step formed from the right short side of the first body and a predetermined length spaced apart from the first left step A first planar core comprising a first right step;
The coil is formed by winding a plurality, and between the eleventh rear step, the twelfth rear step, the eleventh front step and the twelfth front step of the first planar core, the first left step and the first left step of the first planar core. A primary winding disposed surrounding the right step;
A first secondary winding having a plurality of coils stacked thereon and disposed on the primary winding and surrounding the first left step of the first planar core;
A second secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the first right step of the first planar core and spaced apart from the first secondary winding; And
A second main body disposed on the first secondary winding and the second secondary winding, the second main body formed of a rectangular magnetic body, a twenty-first rear step extending from the left rear long side of the second main body, and the second main body of the second main winding. A twenty-second rear step formed on the right rear long side; a twenty-first front step formed on the left front long side of the second body; a twenty-second front step formed on the right front long side of the second body; A second left step formed in the center of the twenty-first rear step and the twenty-first front step from a left short side of the main body; And a second planar core formed from a short side to a predetermined length and including a second right stepped spaced apart from the second left stepped step.

33. The method of claim 32,
The first planar core may include the eleventh rear step, the twelfth rear step, the eleventh front step, the twelfth front step, the first left step, and the first right step with the first body. Plane transformer.

33. The method of claim 32,
The second planar core has the twenty-first rear step, the twenty-second rear step, the twenty-first front step, the twenty-second front step, the second left step, and the second right step formed integrally with the second body. Plane transformer.

33. The method of claim 32,
The length between the eleventh front step of the first planar core and the twelfth front step of the first planar core is equal to the length between the eleventh rear step of the first plane core and the twelfth rear step of the eleventh planar core. Same planar transformer.

33. The method of claim 32,
An interval between the eleventh front step of the first planar core and the twelfth front step of the eleventh planar core and the second plane core is equal to the eleventh rear step of the first planar core and the twelfth of the first planar core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

33. The method of claim 32,
And a first left step or a first right step of the first planar core having a rectangular shape.

33. The method of claim 32,
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

33. The method of claim 32,
And a second left step or second right step of the second planar core has a quadrangular shape.

33. The method of claim 32,
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

A first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, a first front step extending from the front long side of the first body, and the first rear step And a first left step formed in a left length of the first main body at a left center of the first front step, and a right length of the first main step in the right center of the first rear step and the first front step. A first planar core formed from a short side and having a predetermined length and including a first right side step spaced apart from the first left side step, and a first central step formed between the first left side step and the first right side step;
A primary winding formed by winding a plurality of coils and disposed between the first rear step and the first front step of the first planar core and surrounding the first left step and the first right step of the first planar core;
A first secondary winding on which a plurality of coils are stacked, surrounding a first left step of the first planar core on the primary winding, the first secondary winding being disposed so as not to overlap the first center step of the first planar core;
A second secondary winding in which a plurality of coils are stacked, surrounding the first right step of the first planar core on the primary winding, and arranged so as not to overlap the first center step of the first planar core; And
A second main body disposed on the first secondary winding and the second secondary winding, formed of a rectangular magnetic body, a second rear step extending from a rear long side of the second main body, and the front of the second main body; A second front stepped on a long side, a second left stepped to a predetermined length from a left short side of the second main body at a left center of the second rear step and the second front step, and the second rear step And a second right step formed in a right length from the right short side of the second main body at a right center of the second front step and spaced apart from the second left step, between the second left step and the second right step. Planar transformer comprising a second planar core comprising a second central step formed in the.

The method of claim 41, wherein
And the first planar core has the first rear step, the first front step, the first left step, the first center step and the first right step integrally formed in the first body.

The method of claim 41, wherein
And the second planar core has the second rear step, the second front step, the second left step, the second center step, and the second right step integrally formed in the second body.

The method of claim 41, wherein
And a first left step or a first right step of the first planar core having a rectangular shape.

The method of claim 41, wherein
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

The method of claim 41, wherein
And a second left step or second right step of the second planar core has a quadrangular shape.

The method of claim 41, wherein
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

The method of claim 41, wherein
And a first central step of the first planar core has a quadrangular shape.

The method of claim 41, wherein
And a first central step of the first planar core is formed in an elliptic shape or a circular shape.

The method of claim 41, wherein
And a second central step of the second planar core has a quadrangular shape.

The method of claim 41, wherein
And a second central step of the second planar core has an ellipse shape or a circular shape.

A first main body formed of a rectangular magnetic body, an eleventh rear step extending from the left rear long side of the first body, a twelfth rear step extending from the right rear long side of the first main body, and the first main body An eleventh front mandrel extending from the left front long side of the first body; a twelfth front mandrel extending from the right front long side of the first body; and the first main body at the center of the eleventh rear mandrel and the eleventh front mandrel. A first left step formed from the left short side of the predetermined length, and a center length of the first rear step and the twelfth front step formed from the right short side of the first main body and spaced apart from the first left step A first planar core comprising a first first stepped step and a first central step formed between the first left step and the first right step;
The coil is formed by winding a plurality, and between the eleventh rear step, the twelfth rear step, the eleventh front step and the twelfth front step of the first planar core, the first left step and the first left step of the first planar core. A primary winding disposed surrounding the right step;
A first secondary winding on which a plurality of coils are stacked, surrounding a first left step of the first planar core on the primary winding, the first secondary winding being disposed so as not to overlap the first center step of the first planar core;
A second secondary winding in which a plurality of coils are stacked, surrounding the first right step of the first planar core on the primary winding, and arranged so as not to overlap the first center step of the first planar core; And
A second main body disposed on the first secondary winding and the second secondary winding, the second main body formed of a rectangular magnetic body, a twenty-first rear step extending from a left rear long side of the second main body, and a right side of the second main body; A twenty-second rear step that extends to the rear long side; a twenty-first front step formed to extend to the left front long side of the second body; a twenty-second front step formed to extend to the right front long side of the second body; A second left stepped portion formed at a predetermined length from a left short side of the second main body at a center of a twenty-first rear step and a twenty-first front step; A second central step formed from a right short side and having a predetermined length and spaced apart from the second left step, and a second center formed between the second left step and the second right step; Planar transformer including a second flat core including a jaw.

The method of claim 52, wherein
The first planar core may include the eleventh rear step, the twelfth rear step, the eleventh front step, the twelfth front step, the first left step, the first central step, and the first right step. 1 Planar transformer integrally formed in the body.

The method of claim 52, wherein
The second planar core may include the twenty-first rear step, the twenty-second rear step, the twenty-first front step, the twenty-second front step, the second left step, the second central step, and the second right step. 2 Planar transformer integrally formed in the body.

The method of claim 52, wherein
The length between the eleventh front step of the first plane core and the twelfth front step of the first plane core is equal to the length between the eleventh rear step of the first plane core and the twelfth rear step of the first plane core. Same planar transformer.

The method of claim 52, wherein
An interval between the eleventh front step of the first planar core and the twelfth front step of the first planar core and the second plane core is equal to the eleventh rear step of the first planar core and the twelfth of the first plane core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

The method of claim 52, wherein
And a first left step or a first right step of the first planar core having a rectangular shape.

The method of claim 52, wherein
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

The method of claim 52, wherein
And a second left step or second right step of the second planar core has a quadrangular shape.

The method of claim 52, wherein
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

The method of claim 52, wherein
And a first central step of the first planar core has a quadrangular shape.

The method of claim 52, wherein
And a first central step of the first planar core is formed in an elliptic shape or a circular shape.

The method of claim 52, wherein
And a second central step of the second planar core has a quadrangular shape.

The method of claim 52, wherein
And a second central step of the second planar core has an ellipse shape or a circular shape.

A main body formed of a rectangular magnetic body, a rear step extending from the rear long side of the main body, a front step extending from the front long side of the main body, and a left side of the main left side of the rear step and the front step A first planar core comprising a left step formed from a short side to a predetermined length, and a right step formed from a right short side of the main body at a right center of the rear step and the front step and spaced apart from the left step;
A first lower secondary winding in which a plurality of coils are stacked and disposed between the rear step and the front step of the first planar core and surrounding the left step of the first planar core;
A second lower secondary winding in which a plurality of coils are stacked and disposed between the rear step of the first planar core and the front step and surrounding the right step of the first planar core and spaced apart from the first lower secondary winding;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the left side step and the right side step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding a left step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the right step of the first planar core and spaced apart from the first upper secondary winding; And
And a second planar core disposed on the first upper secondary winding and the second upper secondary winding.

66. The method of claim 65,
And the first planar core has the rear step, the front step, the left step, and the right step formed integrally with the main body.

66. The method of claim 65,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

66. The method of claim 65,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

A main body formed of a rectangular magnetic body, a first rear step formed extending to the left rear long side of the main body, a second rear step formed extending to the right rear long side of the main body, and extended to the left front long side of the main body A first front step formed, a second front step extending from the right front long side of the main body, and a left step step formed from the left short side of the main body to a predetermined length at the center of the first rear step and the first front step And a first planar core formed in a center of the second rear step and the second front step from a right short side of the main body and having a right step spaced apart from the left step.
A first lower secondary winding in which a plurality of coils are stacked and disposed between the rear step and the front step of the first planar core and surrounding the left step of the first planar core;
A second lower secondary winding in which a plurality of coils are stacked and disposed between the rear step of the first planar core and the front step and surrounding the right step of the first planar core and spaced apart from the first lower secondary winding;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the left side step and the right side step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding a left step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the right step of the first planar core and spaced apart from the first upper secondary winding; And
And a second planar core disposed on the first upper secondary winding and the second upper secondary winding.

70. The method of claim 69,
And the first planar core has the first rear step, the second rear step, the first front step, the second front step, the left step, and the right step integrally formed in the main body.

70. The method of claim 69,
The length between the first front step of the first planar core and the second front step of the first planar core is equal to the length between the first rear step of the first plane core and the second rear step of the first plane core. Same planar transformer.

70. The method of claim 69,
The distance between the first front step of the first planar core and the second front step of the first planar core and the second planar core is equal to the first rear step of the first planar core and the second of the first planar core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

70. The method of claim 69,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

70. The method of claim 69,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

A main body formed of a rectangular magnetic body, a rear step extending from the rear long side of the main body, a front step extending from the front long side of the main body, and a left side of the main left side of the rear step and the front step A left step formed from a short side to a predetermined length, a right side step formed from a right short side of the main body at a right center of the rear step and the front step and spaced apart from the left step, the left step and the right side A first planar core comprising a central step formed between the steps;
A plurality of coils are stacked, the first lower secondary disposed between the rear step and the front step of the first planar core and enclosing the left step of the first planar core and not overlapping with the central step of the first planar core. Winding;
A plurality of coils stacked, a second lower portion enclosed between the rear step and the front step of the first planar core to surround the right step of the first planar core and not overlap with the central step of the first planar core; Secondary winding;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the left side step and the right side step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked, surrounding a left step of the first planar core on the primary winding, and disposed so as not to overlap the center step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked, surrounding a right side step of the first planar core on the primary winding, and disposed not to overlap the central step of the first plane core; And
And a second planar core disposed on the first upper secondary winding and the second upper secondary winding.

77. The method of claim 75,
And the first planar core has the rear step, the front step, the left step, the center step, and the right step formed integrally with the main body.

77. The method of claim 75,
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

77. The method of claim 75,
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

77. The method of claim 75,
The center step of the first planar core is a planar transformer formed in a rectangular shape.

77. The method of claim 75,
The center step of the first planar core is an elliptical shape or a circular transformer formed in a circular shape.

A main body formed of a rectangular magnetic body, a first rear step formed extending to the left rear long side of the main body, a second rear step formed extending to the right rear long side of the main body, and extended to the left front long side of the main body A first front step formed, a second front step extending from the right front long side of the main body, and a left step step formed from the left short side of the main body to a predetermined length at the center of the first rear step and the first front step And a right side jaw formed at a right length from the right side of the main body at a center of the second rear step and the second front step and spaced apart from the left step, and a central step formed between the left step and the right step. A first planar core comprising a;
A plurality of coils are stacked, surrounding the left step of the first planar core between the first and second rear steps of the first planar core and the first front and second front steps of the first planar core, A first lower secondary winding disposed so as not to overlap the central step of the core;
A plurality of coils are stacked and surround the right side step of the first planar core between the first rear step and the second rear step of the first planar core and the first front step and the second front step, and the first plane A second lower secondary winding disposed so as not to overlap the central step of the core;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the left side step and the right side step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked, surrounding a left step of the first planar core on the primary winding, and disposed so as not to overlap the center step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked, surrounding a right side step of the first planar core on the primary winding, and not overlapping a central step of the first plane core; And
And a second planar core disposed on the first upper secondary winding and the second upper secondary winding.

82. The method of claim 81 wherein
The first planar core is a planar transformer in which the first rear step, the second rear step, the first front step, the second front step, the left step, the central step, and the right step are integrally formed in the main body. .

82. The method of claim 81 wherein
The length between the first front step of the first planar core and the second front step of the first planar core is equal to the length between the first rear step of the first plane core and the second rear step of the first plane core. Same planar transformer.

82. The method of claim 81 wherein
The distance between the first front step of the first planar core and the second front step of the first planar core and the second planar core is equal to the first rear step of the first planar core and the second of the first planar core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

82. The method of claim 81 wherein
The left stage step or the right side step of the first planar core has a quadrangular shape transformer.

82. The method of claim 81 wherein
The left stepped step or the right stepped step of the first planar core has an elliptical shape or a circular shape.

82. The method of claim 81 wherein
The center step of the first planar core is a planar transformer formed in a rectangular shape.

82. The method of claim 81 wherein
The center step of the first planar core is an elliptical shape or a circular transformer formed in a circular shape.

A first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, a first front step extending from the front long side of the first body, and the first rear step And a first left step formed in a left length of the first main body at a left center of the first front step, and a right length of the first main step in the right center of the first rear step and the first front step. A first planar core formed from a short side to a predetermined length and including a right side step spaced apart from the first left side step;
A first lower secondary winding in which a plurality of coils are stacked and disposed between the first rear step of the first planar core and the first front step and surrounding the first left step of the first planar core;
A plurality of coils are stacked, the second spaced apart from the first lower secondary winding surrounding the first right step of the first planar core between the first rear step and the first front step of the first planar core Lower secondary winding;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the first left step and the first right step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the first left step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the first right step of the first planar core and spaced apart from the first upper secondary winding; And
A second main body disposed on the first upper secondary winding and the second upper secondary winding, formed of a rectangular magnetic body, a second rear step extending from a rear long side of the second main body, and the second main body; A second front step formed on the front long side of the second front step, a second left step formed on the left center of the second rear step and the second front step from the left short side of the second body to a predetermined length, and the second And a second planar core formed at a right length of the second main body at a right center of the rear step and the right front step and including a right step spaced apart from the second left step.

91. The method of claim 89 wherein
And the first planar core has the first rear step, the first front step, the first left step and the first right step integrally formed with the first body.

91. The method of claim 89 wherein
And the second planar core has the second rear step, the second front step, the second left step and the second right step integrally formed in the second body.

91. The method of claim 89 wherein
And a first left step or a first right step of the first planar core having a rectangular shape.

91. The method of claim 89 wherein
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

91. The method of claim 89 wherein
And a second left step or second right step of the second planar core has a quadrangular shape.

91. The method of claim 89 wherein
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

A first main body formed of a rectangular magnetic body, an eleventh rear step extending from the left rear long side of the first body, a twelfth rear step extending from the right rear long side of the first main body, and the first An eleventh front step formed on the left front long side of the main body, a twelfth front step formed on the right front long side of the first main body, and a center of the eleventh rear step and the eleventh front step The first left step formed from the left short side and the predetermined length, the center of the twelfth rear step and the 12th front step formed from the right short side of the first body and a predetermined length spaced apart from the first left step A first planar core comprising a first right step;
A plurality of coils are stacked and disposed between the eleventh rear step and the twelfth rear step of the first planar core and the first left step of the first planar core between the eleventh front step and the twelfth front step. 1 lower secondary winding;
A plurality of coils are stacked, and the first lower step surrounds the first right step of the first planar core between the eleventh rear step of the first planar core and the twelfth rear step of the first planar core and the twelfth front step. A second lower secondary winding spaced apart from the secondary winding;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the first left step and the first right step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the first left step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked and disposed on the primary winding and surrounding the first right step of the first planar core and spaced apart from the first upper secondary winding; And
A second main body disposed on the first upper secondary winding and the second upper secondary winding, the second main body formed of a rectangular magnetic body, a twenty-first rear step extending from a left rear long side of the second main body, and the second second secondary winding; A twenty-second rear step that extends to the right rear long side of the main body, a twenty-first front step that extends to the left front long side of the second main body, and a twenty-second front step that extends to the right front long side of the second main body; And a second left jaw formed at a predetermined length from a left short side of the main body at the center of the twenty-first rear step and the twenty-first front step, and the second main body at a center of the twenty-second rear step and the twenty-second front step. And a second planar core formed from a right short side of the predetermined length and including a second right side step spaced apart from the second left side step.

97. The method of claim 96,
The first planar core may include the eleventh rear step, the twelfth rear step, the eleventh front step, the twelfth front step, the first left step, and the first right step with the first body. Plane transformer.

97. The method of claim 96,
The second planar core has the twenty-first rear step, the twenty-second rear step, the twenty-first front step, the twenty-second front step, the second left step, and the second right step formed integrally with the second body. Plane transformer.

97. The method of claim 96,
The length between the eleventh front step of the first planar core and the twelfth front step of the first planar core is equal to the length between the eleventh rear step of the first plane core and the twelfth rear step of the eleventh planar core. Same planar transformer.

97. The method of claim 96,
An interval between the eleventh front step of the first planar core and the twelfth front step of the eleventh planar core and the second plane core is equal to the eleventh rear step of the first planar core and the twelfth of the first planar core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

97. The method of claim 96,
And a first left step or a first right step of the first planar core having a rectangular shape.

97. The method of claim 96,
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

97. The method of claim 96,
And a second left step or second right step of the second planar core has a quadrangular shape.

97. The method of claim 96,
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

A first body formed of a rectangular magnetic body, a first rear step extending from the rear long side of the first body, a first front step extending from the front long side of the first body, and the first rear step And a first left step formed in a left length of the first main body at a left center of the first front step, and a right length of the first main step in the right center of the first rear step and the first front step. A first planar core formed from a short side and having a predetermined length and including a first right side step spaced apart from the first left side step, and a first central step formed between the first left side step and the first right side step;
A plurality of coils are stacked, the first disposed between the rear step and the front step of the first planar core surrounding the left step of the first planar core, and is disposed so as not to overlap the first central step of the first planar core Lower secondary winding;
A plurality of coils stacked, a second disposed between the rear step and the front step of the first planar core and surrounding the right step of the first planar core and disposed so as not to overlap the first central step of the first planar core Lower secondary winding;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the left side step and the right side step of the first planar core;
A first upper secondary winding in which a plurality of coils are stacked, surrounding a left step of the first planar core on the primary winding, and disposed not to overlap the first center step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked, surrounding the right step of the first planar core on the primary winding, and disposed not to overlap the first center step of the first planar core; And
A second main body disposed on the first upper secondary winding and the second upper secondary winding, formed of a rectangular magnetic body, a second rear step extending from a rear long side of the second main body, and the second main body; A second front step formed on the front long side of the second front step, a second left step formed on the left center of the second rear step and the second front step from the left short side of the second body to a predetermined length, and the second A second right step formed from a right short side of the second main body at a right center of the rear step and the second front step and spaced apart from the second left step, the second left step and the second right step; A plane transformer comprising a second planar core comprising a second central step formed between the steps.

105. The method of claim 105,
And the first planar core has the first rear step, the first front step, the first left step, the first center step and the first right step integrally formed in the first body.

105. The method of claim 105,
And the second planar core has the second rear step, the second front step, the second left step, the second center step, and the second right step integrally formed in the second body.

105. The method of claim 105,
And a first left step or a first right step of the first planar core having a rectangular shape.

105. The method of claim 105,
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

105. The method of claim 105,
And a second left step or second right step of the second planar core has a quadrangular shape.

105. The method of claim 105,
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

105. The method of claim 105,
And a first central step of the first planar core has a quadrangular shape.

105. The method of claim 105,
And a first central step of the first planar core is formed in an elliptic shape or a circular shape.

105. The method of claim 105,
And a second central step of the second planar core has a quadrangular shape.

105. The method of claim 105,
And a second central step of the second planar core has an ellipse shape or a circular shape.

A first main body formed of a rectangular magnetic body, an eleventh rear step extending from the left rear long side of the first body, a twelfth rear step extending from the right rear long side of the first main body, and the first main body An eleventh front mandrel extending from the left front long side of the first body; a twelfth front mandrel extending from the right front long side of the first body; and the first main body at the center of the eleventh rear mandrel and the eleventh front mandrel. A first left step formed from the left short side of the predetermined length, and a center length of the first rear step and the twelfth front step formed from the right short side of the first main body and spaced apart from the first left step A first planar core comprising a first first stepped step and a first central step formed between the first left step and the first right step;
A plurality of coils are stacked, surrounding the first left step of the first planar core between the eleventh rear step and the twelfth rear step of the first planar core and the eleventh front step and the twelfth front step, A first lower secondary winding disposed so as not to overlap the first central step of the first planar core;
A plurality of coils are stacked, and surround the first right step of the first planar core between the eleventh rear step and the twelfth rear step of the first planar core and the eleventh front step and the twelfth front step. A second lower secondary winding disposed so as not to overlap the first central step of the first planar core;
A primary winding formed by winding a plurality of coils and disposed on the first lower secondary winding and the second lower secondary winding, the primary winding surrounding the first left step and the first right step of the first planar core;
A first upper secondary winding on which a plurality of coils are stacked, surrounding a first left step of the first planar core on the primary winding, the first upper secondary winding being disposed so as not to overlap the first center step of the first planar core;
A second upper secondary winding in which a plurality of coils are stacked, surrounding the first right step of the first planar core on the primary winding, and arranged so as not to overlap the first center step of the first planar core; And
A second main body disposed on the first upper secondary winding and the second upper secondary winding, the second main body formed of a rectangular magnetic body, a twenty-first rear step extending from the left rear long side of the second main body, and the second main body; A twenty-second rear step formed to extend to the right rear long side of the second twenty-first front step formed to extend to the left front long side of the second body; a twenty-second front step formed to extend to the right front long side of the second main body; A second left step formed in a predetermined length from a left short side of the second main body at a center of the twenty-first rear step and the twenty-first front step, and a second at the center of the twenty-second rear step and the twenty-second front step; A second right stepped portion formed from a right short side of the main body and having a predetermined length and spaced apart from the second left stepped portion, and formed between the second left stepped step and the second right stepped step. A planar transformer comprising a second planar core comprising a second central step.

116. The method of claim 116 wherein
The first planar core may include the eleventh rear step, the twelfth rear step, the eleventh front step, the twelfth front step, the first left step, the first central step, and the first right step. 1 Planar transformer integrally formed in the body.

116. The method of claim 116 wherein
The second planar core may include the twenty-first rear step, the twenty-second rear step, the twenty-first front step, the twenty-second front step, the second left step, the second central step, and the second right step. 2 Planar transformer integrally formed in the body.

116. The method of claim 116 wherein
The length between the eleventh front step of the first plane core and the twelfth front step of the first plane core is equal to the length between the eleventh rear step of the first plane core and the twelfth rear step of the first plane core. Same planar transformer.

116. The method of claim 116 wherein
An interval between the eleventh front step of the first planar core and the twelfth front step of the first planar core and the second plane core is equal to the eleventh rear step of the first planar core and the twelfth of the first plane core. A plane transformer equal to the spacing between the rear steps and between the second plane cores.

116. The method of claim 116 wherein
And a first left step or a first right step of the first planar core having a rectangular shape.

116. The method of claim 116 wherein
And a first left step or first right step of the first planar core is formed in an elliptical shape or a circular shape.

116. The method of claim 116 wherein
And a second left step or second right step of the second planar core has a quadrangular shape.

116. The method of claim 116 wherein
The second left stepped jaw or the second right stepped jaw of the second planar core has an elliptical shape or a circular shape.

116. The method of claim 116 wherein
And a first central step of the first planar core has a quadrangular shape.

116. The method of claim 116 wherein
And a first central step of the first planar core is formed in an elliptic shape or a circular shape.

116. The method of claim 116 wherein
And a second central step of the second planar core has a quadrangular shape.

116. The method of claim 116 wherein
And a second central step of the second planar core has an ellipse shape or a circular shape.