CN212182113U - LLC integrated transformer - Google Patents

LLC integrated transformer Download PDF

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Publication number
CN212182113U
CN212182113U CN202020767259.XU CN202020767259U CN212182113U CN 212182113 U CN212182113 U CN 212182113U CN 202020767259 U CN202020767259 U CN 202020767259U CN 212182113 U CN212182113 U CN 212182113U
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CN
China
Prior art keywords
groove
primary
winding
transformer
framework
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Active
Application number
CN202020767259.XU
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Chinese (zh)
Inventor
蒋建跃
周晓媛
张志峰
钱凯耀
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Jiangxi Oumeiya Electronics Co ltd
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Jiangxi Oumeiya Electronics Co ltd
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Priority to CN202020767259.XU priority Critical patent/CN212182113U/en
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Abstract

The utility model discloses an LLC integrated transformer, including the skeleton, install in the magnetic core and the coil of skeleton, the coil includes primary and secondary, the skeleton includes outer skeleton and inner frame, the length one end of outer skeleton is the primary side, the other end is the secondary side, outer skeleton is equipped with primary stitch in the bottom surface of primary side, outer skeleton is equipped with secondary stitch in the bottom surface of secondary side, outer skeleton is equipped with upper groove and lower floor's groove, the inner frame is equipped with primary winding groove, the primary winding coiling is in primary winding groove, the upper groove is inserted to the inner frame, secondary inserts lower floor's groove, the magnetic core includes two E type magnetic cores, outer skeleton and inner frame correspond be equipped with the center pillar groove with E type magnetic core center pillar complex. The utility model discloses when separating primary winding and secondary winding, realized the flattening design, primary winding and secondary winding all can adopt the flattening design simultaneously to whole thickness has been reduced.

Description

LLC integrated transformer
Technical Field
The utility model belongs to the technical field of the transformer.
Background
There is a need for a LLC transformer for use in power supplies of electronic devices, which has high requirements for its size and thickness, and thus further reduction in thickness. The optimization and improvement of the transformer structure is always the research direction of the technicians in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an integrated transformer of LLC is provided, thickness can further be reduced.
In order to solve the technical problem, the utility model adopts the following technical scheme: the utility model provides an integrated transformer of LLC, includes the skeleton of transformer, installs in the magnetic core and the coil of skeleton of transformer, the coil includes primary and secondary, the skeleton of transformer includes outer skeleton and inner frame, the length one end of outer skeleton is primary side, and the other end is secondary side, outer skeleton is equipped with primary stitch in the bottom surface of primary side, outer skeleton is equipped with secondary stitch in the bottom surface of secondary side, outer skeleton is equipped with upper groove and lower floor's groove, the inner frame is equipped with primary winding groove, the primary winding coiling is in primary winding groove, the upper groove is inserted to the inner frame, secondary inserts lower floor's groove, the magnetic core includes two E type magnetic cores, outer skeleton and inner frame correspond be equipped with E type magnetic core center pillar complex center pillar groove.
Preferably, the upper layer groove and the lower layer groove are both provided with closed ends and open ends.
Preferably, the open ends of the upper and lower grooves are in opposite directions and are located on the primary and secondary sides, respectively.
Preferably, the outer side surfaces of the primary side and the secondary side are provided with convex columns protruding outwards corresponding to each stitch, the primary stitches and the secondary stitches are arranged on the bottom surfaces of the convex columns, and a thread passing groove is formed between every two adjacent convex columns.
Preferably, the exoskeleton is provided with baffles for isolating the magnetic cores on both the primary side and the secondary side.
Preferably, the primary side of the exoskeleton is provided with a step part for increasing the creeping distance between the baffle and the primary stitch.
The utility model discloses a technical scheme, following beneficial effect has:
the outer framework is of an upper-lower layered structure, the inner framework and the primary winding on the inner framework are inserted into the upper-layer groove, the secondary winding is inserted into the lower-layer groove, the primary winding and the secondary winding are separated, meanwhile, the flattening design is achieved, and meanwhile both the primary winding and the secondary winding can adopt the flattening design, so that the overall thickness is reduced.
The specific technical solution and the advantages of the present invention will be described in detail in the following detailed description with reference to the accompanying drawings.
Drawings
The invention will be further described with reference to the accompanying drawings and specific embodiments:
fig. 1 is a first schematic structural diagram of the middle and outer framework of the present invention;
FIG. 2 is a second schematic structural view of the outer frame of the present invention;
FIG. 3 is a schematic structural view of the inner frame of the present invention;
fig. 4 is a schematic diagram of the combination of the secondary windings in the present invention;
FIG. 5 is a schematic structural view of a first secondary copper sheet of the present invention;
FIG. 6 is a schematic structural view of a second copper sheet according to the present invention;
fig. 7 is a schematic structural view of the middle thin magnetic sheet of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It will be appreciated by those skilled in the art that features from the examples and embodiments described below may be combined with each other without conflict.
Referring to fig. 1 to 7, an LLC integrated transformer includes a bobbin, a magnetic core mounted to the bobbin, and a coil including a primary winding and a secondary winding.
Wherein, the transformer skeleton includes exoskeleton 1 and endoskeleton 2, the length one end of exoskeleton 1 is primary side 11, and the other end is secondary side 12, exoskeleton 1 is equipped with elementary stitch in the bottom surface of primary side, exoskeleton 1 is equipped with secondary stitch in the bottom surface of secondary side, exoskeleton 1 is equipped with upper groove 16 and lower floor's groove 15, adopts the baffle to separate between upper groove 16 and the lower floor's groove 15.
Referring to fig. 3, the inner bobbin 2 is provided with a primary winding groove 21 in which the primary winding is wound.
Further, the inner bobbin 2 is inserted into the upper layer slot 16 together with the primary winding, and the secondary winding is inserted into the lower layer slot 15. Therefore, through the layered design, the primary winding and the secondary winding are separated, meanwhile, the flat design is realized, and the thickness is reduced.
Referring to fig. 4 to 6, the secondary winding 3 includes a first secondary copper sheet 31 and a second secondary copper sheet 32 laminated together, the first secondary copper sheet 31 and the second secondary copper sheet 32 are both formed by winding a rectangular strip copper sheet, the first secondary copper sheet 31 and the second secondary copper sheet 32 both include an annular portion and pin portions at both ends, the two pin portions are located on one radial side of the annular portion and are parallel to each other, one of the two pin portions is longer than the other, the long pin portions of the first secondary copper sheet 31 and the second secondary copper sheet 32 are stacked in alignment, and the short pin portions of the first secondary copper sheet 31 and the second secondary copper sheet 32 are located on both sides of the width of the long pin portion. As mentioned above, when the secondary side copper sheet is wound, the two prefabricated copper sheets are assembled together in a rotating mode, which is equal to double-wire parallel winding, the coupling performance between the two copper sheets is improved, compared with the situation that the two copper sheets are stacked together, the thickness of the copper sheets can be reduced, and the winding space is more abundant.
In addition, the magnetic core includes two E type magnetic cores, exoskeleton 1 and inner frame 2 correspond and are equipped with the center pillar groove 13 with E type magnetic core center pillar complex.
The leakage inductance of the LLC transformer needs to be controlled within a certain range, and therefore, referring to fig. 7, the ultra-thin magnetic integrated transformer further includes a thin magnetic sheet 4 for increasing the leakage inductance, the thin magnetic sheet 4 is inserted into the lower slot 15 and stacked above the secondary winding, and the thin magnetic sheet 4 is square. The thin magnetic sheet is placed in the winding process, so that leakage inductance can be increased.
Wherein, the upper layer groove 16 and the lower layer groove 15 are both provided with a closed end and an open end. The open ends of the upper and lower slots 16, 15 are oppositely directed and are located on the primary and secondary sides, respectively.
In addition, can refer to current design, the lateral surface of primary side and secondary side corresponds every stitch and is equipped with the convex post of outside protrusion, and primary stitch and secondary stitch are located on the convex post bottom surface, are equipped with between two adjacent convex posts and cross the wire casing. The exoskeleton 1 is provided with baffles 14 on both the primary side and the secondary side to isolate the magnetic cores. The primary side of the exoskeleton is provided with a step part 17 for increasing the creeping distance between the baffle 14 and the primary stitch so as to improve the safety.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification which does not depart from the functional and structural principles of the present invention is intended to be included within the scope of the claims.

Claims (6)

1. The utility model provides an integrated transformer of LLC, includes the skeleton of transformer, installs in the magnetic core and the coil of skeleton of transformer, the coil includes primary winding and secondary winding, its characterized in that: the transformer framework comprises an outer framework and an inner framework, wherein one end of the length of the outer framework is a primary side, the other end of the outer framework is a secondary side, primary pins are arranged on the bottom surface of the primary side of the outer framework, secondary pins are arranged on the bottom surface of the secondary side of the outer framework, the outer framework is provided with an upper groove and a lower groove, the inner framework is provided with a primary winding groove, a primary winding is wound in the primary winding groove, the inner framework is inserted into the upper groove, the secondary winding is inserted into the lower groove, the magnetic core comprises two E-type magnetic cores, and the outer framework and the inner framework are correspondingly provided with center post grooves matched with center posts of the E-type magnetic cores.
2. The LLC integrated transformer of claim 1, wherein: the upper layer groove and the lower layer groove are both provided with closed ends and open ends.
3. The LLC integrated transformer of claim 2, wherein: the opening ends of the upper layer groove and the lower layer groove are opposite in direction and are respectively positioned on the primary side and the secondary side.
4. An LLC integrated transformer as claimed in any one of claims 1 to 3, wherein: the outer side surfaces of the primary side and the secondary side are provided with convex columns protruding outwards corresponding to each stitch, the primary stitches and the secondary stitches are arranged on the bottom surfaces of the convex columns, and a thread passing groove is formed between every two adjacent convex columns.
5. The LLC integrated transformer of claim 4, wherein: the exoskeleton is provided with baffles for isolating the magnetic cores at the primary side and the secondary side.
6. The LLC integrated transformer of claim 5, wherein: the primary side of the outer framework is provided with a step part for increasing the creeping distance between the baffle and the primary stitch.
CN202020767259.XU 2020-05-11 2020-05-11 LLC integrated transformer Active CN212182113U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202020767259.XU CN212182113U (en) 2020-05-11 2020-05-11 LLC integrated transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202020767259.XU CN212182113U (en) 2020-05-11 2020-05-11 LLC integrated transformer

Publications (1)

Publication Number Publication Date
CN212182113U true CN212182113U (en) 2020-12-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202020767259.XU Active CN212182113U (en) 2020-05-11 2020-05-11 LLC integrated transformer

Country Status (1)

Country Link
CN (1) CN212182113U (en)

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