CN213844987U

CN213844987U - Low-cost flat safety type LLC transformer

Info

Publication number: CN213844987U
Application number: CN202120023281.8U
Authority: CN
Inventors: 高应存; 杨胜麒; 傅翼
Original assignee: Shanghai Meixing Electronic Co ltd
Current assignee: Shanghai Meixing Electronic Co ltd
Priority date: 2021-01-05
Filing date: 2021-01-05
Publication date: 2021-07-30
Anticipated expiration: 2031-01-05

Abstract

A low-cost flat safety type LLC transformer, includes: the transformer is connected with the framework structure, and the insulating adhesive tape is connected with the transformer and the surface of the framework structure. Wherein, the transformer includes: the coil comprises a primary coil, a double secondary coil, a sheath, a magnetic core and a magnetic core center pillar. Compared with the prior art, the utility model, through the circuit part of design multislot coiling, from the aspect of magnetic circuit structure and skeleton texture, vertical mounting means is adopted in the magnetic core installation, and the mode of side insertion hook is adopted to the skeleton mounting means, realizes that the transformer reaches the platformization, and is small, and anti saturation capacity is strong, low cost, and the security level is high.

Description

Low-cost flat safety type LLC transformer

Technical Field

The utility model relates to an used novel high efficiency flattening LLC transformer of switching power supply, concretely relates to low-cost flattening ann rule type LLC transformer.

Background

Since the switching losses of LLC circuits are very small, the operating frequency can be designed higher and therefore the power can be made larger. Therefore, the high-power LLC transformer is widely applied to a high-power switching power supply, but the high-power LLC transformer has large power and thick wire diameter and still meets the safety requirements, so that the volume of the conventional LLC transformer is large, particularly the height of the conventional LLC transformer is high, and the height of the 100W LLC transformer reaches 25 mm; therefore, the volume, particularly the height, of the whole power supply can not meet the requirements of a miniaturized and flattened power supply, so that the height of the power supply shell can be reduced only by flattening installation, and the space is saved; because LLC transformer current output is big, and the line footpath is thick, consequently still can not adopt conventional SMD paster skeleton mounting structure to reduce the height, and SMD paster structure height reduction is also limited.

Therefore, the design and development of a flat LLC transformer are urgently needed, the height of 100W is required to be reduced to be within 15mm, the difference of two groups of output leakage inductance is small, the anti-saturation capacity is strong, and the safety requirements are met.

In order to solve the above problems, we have made a series of improvements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low-cost flat ann rule type LLC transformer to overcome the above-mentioned shortcoming and not enough that prior art exists.

A low-cost flat safety type LLC transformer, includes: the transformer is connected with the framework structure, and the insulating adhesive tape is connected with the transformer and the surface of the framework structure;

wherein the transformer comprises: the magnetic core comprises a primary coil, two secondary coils, a sheath, a magnetic core and magnetic core center pillars, wherein the primary coil, the two secondary coils and the magnetic core are connected with a framework structure, the sheath is connected with the two secondary coils, the magnetic core center pillars are connected with the magnetic core, the distance between the primary coil and the two secondary coils is larger than 8.0mm, and the air gap of the magnetic core center pillars is 0.5 mm.

Further, the skeletal structure comprises: the novel transformer comprises a framework, a first notch, a second notch and a bent foot, wherein the first notch and the second notch are arranged on the framework, the first notch is connected with a primary coil, the second notch is connected with a double secondary coil and a sheath, and the bent foot is connected with two sides of the framework.

Further, the magnetic core is an EEDS specification magnetic core, and the material of the magnetic core is MX50B high-temperature high-magnetic-induction-strength magnetic material.

The utility model has the advantages that:

compared with the prior art, the utility model, through the circuit part of design multislot coiling, from the aspect of magnetic circuit structure and skeleton texture, vertical mounting means is adopted in the magnetic core installation, and the mode of side insertion hook is adopted to the skeleton mounting means, realizes that the transformer reaches the platformization, and is small, and anti saturation capacity is strong, low cost, and the security level is high.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the framework structure of the present invention.

Fig. 3 is a schematic structural diagram of the magnetic core of the present invention.

Reference numerals:

transformer 100, primary coil 110, dual secondary coil 120, sheath 130, magnetic core 140, and core leg 150.

Skeleton structure 200, skeleton 210, first notch 220, second notch 230, curved foot 240 and insulating tape 300.

Detailed Description

The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.

Example 1

Fig. 1 is a schematic structural diagram of the present invention. Fig. 2 is a schematic structural diagram of the framework structure of the present invention. Fig. 3 is a schematic structural diagram of the magnetic core of the present invention.

As shown in fig. 1 and 3, a low-cost flat safety-type LLC transformer includes: the transformer 100 is connected with the framework structure 200, and the insulating adhesive tape 300 is connected with the surfaces of the transformer 100 and the framework structure 200;

wherein, transformer 100 includes: the transformer comprises a primary coil 110, a double secondary coil 120, a sheath 130, a magnetic core 140 and a core leg 150, wherein the primary coil 110, the double secondary coil 120 and the magnetic core 140 are connected with a framework structure 200, the sheath 130 is connected with the double secondary coil 120, the core leg 150 is connected with the magnetic core 140, the distance between the primary coil 110 and the double secondary coil 120 is larger than 8.0mm, and the core leg 150 is provided with an air gap of 0.5 mm.

As shown in fig. 2, the skeletal structure 200 includes: the primary coil comprises a framework 210, a first notch 220, a second notch 230 and a bent foot 240, wherein the first notch 220 and the second notch 230 are arranged on the framework 210, the first notch 220 is connected with the primary coil 110, the second notch 230 is connected with the double secondary coils 120 and the sheath 130, and the bent foot 240 is connected with two sides of the framework 210.

The magnetic core 140 is an EEDS-compliant magnetic core, and the material of the magnetic core 140 is MX50B high-temperature high-magnetic-induction-strength magnetic material.

The utility model discloses an operating principle is, design the magnetic core 140 of transformer 100 of flattening structure, in the aspect of magnetic core 140's design, conventional appearance structure has been broken, adopt EEDS structure to replace traditional EER structure, non-standard design is widened in magnetic core center pillar 150 adoption flattening, conventional circular design has been broken, the required sectional area of product has not only been guaranteed, simultaneously can greatly reduced product height, realize the product miniaturization, magnetic core 140 material adopts MX50B high-temperature high magnetic induction intensity magnetic material, satisfy the requirement of product high saturation intensity.

The design of skeleton texture 200 adopts 2 grooves, including first notch 220 and second notch 230, is suitable for high voltage 600VDC operating requirement, and the maximize increases the ann rule distance between first/secondary stage > 8.0mm for the product satisfies the VDE standard, and the mounting means adopts the mode of side insertion hook 240, and greatly reduced product height, final product height can satisfy <14.5 mm.

The transformer is designed by winding a primary coil in a first notch 220, uniformly distributing the primary coil, placing 2/3 wound around a double-secondary coil 120 in a second notch 230 in a balanced manner, ensuring that the high-efficiency double-output balanced characteristic is less than 2% of error, completely isolating a primary coil 110 from the double-secondary coil 120 by a secondary second notch 230 and a sheath 130, ensuring that the safety distance between the primary coil 110 and the double-secondary coil 120 is more than 8.0mm, adopting ED25.7/14/30.1 for a magnetic core 140, opening an air gap of 0.5mm in a center pillar 150 of the magnetic core, and finally carrying out moisture-proof treatment by vacuum dip coating on a product. The utility model discloses a design the circuit part of multislot coiling, from the aspect of magnetic circuit structure and skeleton texture, vertical mounting means is adopted in the magnetic core installation, and the mode of hook is inserted to the skeleton mounting means adoption side, realizes that the transformer reaches the flattening, and is small, and anti saturation capacity is strong, low cost, and the security level is high.

The above description has been made of the embodiments of the present invention, but the present invention is not limited thereto, and various changes may be made without departing from the spirit of the present invention.

Claims

1. A low-cost flattening ann rule type LLC transformer which characterized in that includes: the transformer comprises a transformer (100), a framework structure (200) and an insulating adhesive tape (300), wherein the transformer (100) is connected with the framework structure (200), and the insulating adhesive tape (300) is connected with the surfaces of the transformer (100) and the framework structure (200);

wherein the transformer (100) comprises: the transformer comprises a primary coil (110), a double-secondary coil (120), a sheath (130), a magnetic core (140) and a magnetic core center pillar (150), wherein the primary coil (110), the double-secondary coil (120) and the magnetic core (140) are connected with a framework structure (200), the sheath (130) is connected with the double-secondary coil (120), the magnetic core center pillar (150) is connected with the magnetic core (140), the distance between the primary coil (110) and the double-secondary coil (120) is larger than 8.0mm, and the air gap of the magnetic core center pillar (150) is 0.5 mm.

2. A low cost flattened safety-compliant LLC transformer according to claim 1, characterized in that said skeleton structure (200) comprises: skeleton (210), first notch (220), second notch (230) and hook (240), first notch (220) and second notch (230) are located on skeleton (210), first notch (220) are connected with primary coil (110), second notch (230) are connected with two secondary coil (120) and sheath (130), hook (240) are connected with skeleton (210) both sides.

3. The low-cost flat safety-type LLC transformer according to claim 1, wherein: the magnetic core (140) is an EEDS standard magnetic core, and the material of the magnetic core (140) is MX50B high-temperature high-magnetic-induction-strength magnetic material.