Novel LLC transformer

Abstract

The utility model relates to the technical field of transformers, and discloses a novel LLC transformer which comprises a base and two magnetic cores, the magnetic cores on the two sides are both fixedly connected to the inner wall of the base, the two sides of the tops of the magnetic cores on the two sides are both fixedly connected with frameworks, the two sides of the middle of the base are both provided with a plurality of three-layer insulated wires, and the middle of the inner wall of the base is provided with a plurality of magnetic sheets. The outer wall of the base is provided with a protection maintenance assembly used for maintaining the whole LLC transformer. The size of leakage inductance is adjusted to adapt to different resonance requirements by utilizing a special structure of the framework and combining different sizes, shapes and placement positions of the magnetic sheets, so that the purpose of canceling a traditional independent resonance inductor or a common magnetic circuit inductor is achieved, the wire rod adopts a multi-strand three-layer insulated wire winding to effectively reduce the turn-to-turn capacitance and the interlayer capacitance of the winding, and the cost is reduced. And the magnetic core is made of a manganese-zinc material, so that the magnetic core has the characteristics of broadband, high temperature and low loss.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, concretely is a novel LLC transformer. BACKGROUND

[0002] LLC transformer is a kind of transformer for power electronic conversion, usually used in high-frequency switching power supply, and the "LLC" in its name represents the three main components in its working principle: L (inductance), L (inductance) and C (capacitance), the design of this kind of transformer aims at realizing efficient energy transmission and good electrical performance, in recent ten years, transformer has got rapid development in domestic, is widely used in city power supply system, high-rise building, trade plaza, entertainment center, hotel, entertainment center and the fireproof and explosion-proof place and low-temperature humid environment, with the rapid development of China's economic construction, market and the quality requirement of mass users to transformer are gradually improved, for this reason, transformer manufacturers should improve the quality of transformer in the process of production, reduce the bad rate of transformer;

[0003] However, the traditional LLC transformer adopts two separate individuals or adopts the structure of transformer and resonant common magnetic circuit, with the miniaturization of market demand, the price competition of peer, the cost advantage of two independent devices or common magnetic circuit structure is more and more unobvious, manufacturing process and material cost compared with the new technology integrated structure of the present application obviously have no competitive advantage, and the existing LLC integrated transformer body is directly exposed to air, in some dusty places, LLC integrated transformer body appears the phenomenon that the surface insulation layer is corroded under the pollution of dust, and LLC integrated transformer body does not have protection function, LLC integrated transformer body directly exposed to the outside is vulnerable to extrusion collision under the outside world and appears the phenomenon of damage, simultaneously, the existing LLC integrated transformer body generates a lot of heat in the process of running, if not heat dissipation in time, it will lead to the service life of LLC integrated transformer body shortening, even to LLC integrated transformer body unable to work normally;

[0004] Therefore, a novel LLC transformer is provided. Utility model content

[0005] The utility model aims at providing a novel LLC transformer to solve the problems in the above background.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A novel LLC transformer, including base and two magnetic cores, both sides magnetic core all are fixedly connected in the inner wall of base, both sides the top of both sides magnetic core all is fixedly connected with framework, the middle part both sides of base all is provided with a plurality of three layer insulation wire, the inner wall middle part of base is provided with a plurality of magnetic sheet, the outer wall of base is provided with the protection and maintenance inspection subassembly for maintaining LLC transformer whole body, wherein:

[0007] The protection and maintenance inspection subassembly includes a mounting seat, the mounting seat is fixedly connected to the outer wall of any one side magnetic core, the top of the mounting seat is fixedly connected with an L-shaped board, the middle part of the L-shaped board is fixedly connected with an electric telescopic rod, the driving end of the electric telescopic rod is fixedly connected with a wedge-shaped block, the top center of the mounting seat is fixedly connected with a T-shaped rail, the wedge-shaped block is slidably connected to the top of the T-shaped rail, the middle part of the L-shaped board is slidably connected with a movable column, and the bottom end of the movable column is fixedly connected with a roller.

[0008] Preferably, the outer wall of the movable column is located below the L-shaped board and is sleeved with a connecting spring.

[0009] Preferably, one end of the connecting spring is fixedly connected with the L-shaped board, and the other end of the connecting spring is fixedly connected with the roller.

[0010] Preferably, the outer wall of the roller is slidably connected to the top of the wedge-shaped block, and an arc groove is formed in the middle part of the side of the top end outer wall of the movable column close to the magnetic core.

[0011] Preferably, the top of the L-shaped board is fixedly connected with a guide column, and the outer wall of the guide column is slidably connected to the inner wall of the arc groove.

[0012] Preferably, the top end of the movable column is fixedly connected with a refrigeration fin.

[0013] Compared with the prior art, the utility model has the beneficial effects that:

[0014] 1. By adopting an open structure, heat dissipation is facilitated, the current density of the wire can be larger, the volume can be smaller under the same power, the size of leakage inductance is adjusted by the special structure of the skeleton combined with the size, shape and placement position of the magnetic sheet to adapt to different resonance requirements, the purpose of canceling the traditional separate resonance inductor or common magnetic circuit inductor is achieved, thus reducing production time, reducing material cost, reducing product volume, fully meeting the needs of the current market competition, the multi-strand three-layer insulated wire winding of the wire can effectively reduce the turn-to-turn and layer-to-layer capacitance of the winding, and the insulation performance is enhanced, the magnetic sheet adopts a runway shape and is installed with the skeleton, the process is simple, convenient and fast, the magnetic core uses manganese-zinc material, has the characteristics of wide frequency, high temperature and low loss, and adopts a UU shape, which is beneficial to heat dissipation of the coil and the magnetic core. Smaller volume can be achieved under the same power;

[0015] 2. By arranging the electric telescopic rod to drive the wedge-shaped block to move on the outer wall of the T-shaped rail, and by designing the slope of the contact surface, the roller can roll along the slope, the movable column is triggered to move in the vertical direction by extruding the connecting spring, when the LLC transformer is in operation, the cooling fin is adjusted to be close to the LLC transformer, the accumulated heat generated by the LLC transformer is dispersed and eliminated, on the contrary, when maintenance is needed, the cooling fin is away from the LLC transformer, so that enough space is left above for the operator to operate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic view of the overall device of the utility model;

[0017] Figure 2 It is a side view schematic view of the overall device of the utility model;

[0018] Figure 3 It is the utility model Figure 2 It is an enlarged schematic view of A in the utility model;

[0019] Figure 4 It is a partial structure schematic view of the protection and maintenance assembly of the utility model;

[0020] Figure 5 It is a structure integrated schematic view of the magnetic sheet of the utility model.

[0021] In the figure:

[0022] 1. Base; 2. Magnetic core; 3. Skeleton; 4. Three-layer insulated wire; 5. Magnetic sheet;

[0023] The protection and maintenance assembly comprises: 61, mounting seat; 62, T-shaped rail; 63, L-shaped plate; 64, electric telescopic rod; 65, wedge-shaped block; 66, movable column; 67, connecting spring; 68, roller; 69, arc groove; 610, guide column; 611, cooling fin. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figures 1 to 5 An embodiment provided by the utility model: a novel LLC transformer, comprising a base 1 and two magnetic cores 2, both of the two magnetic cores 2 are fixedly connected to the inner wall of the base 1, the top of both of the two magnetic cores 2 is fixedly connected with a framework 3, the middle of both sides of the base 1 is provided with a plurality of three-layer insulation wires 4, the middle of the inner wall of the base 1 is provided with a plurality of magnetic sheets 5, and the outer wall of the base 1 is provided with a protection and maintenance assembly for maintaining the whole LLC transformer, wherein:

[0026] The protection and maintenance assembly comprises a mounting seat 61, the mounting seat 61 is fixedly connected to the outer wall of any one of the magnetic cores 2, the top of the mounting seat 61 is fixedly connected with an L-shaped plate strip 63, the middle of the L-shaped plate strip 63 is fixedly connected with an electric telescopic rod 64, the driving end of the electric telescopic rod 64 is fixedly connected with a wedge-shaped block 65, the top center of the mounting seat 61 is fixedly connected with a T-shaped rail strip 62, the wedge-shaped block 65 is slidingly connected to the top of the T-shaped rail strip 62, the middle of the L-shaped plate strip 63 is slidingly connected with a movable column 66, and the bottom end of the movable column 66 is fixedly connected with a roller 68;

[0027] Among them: the three-layer insulation wires 4 and the magnetic sheets 5 are symmetrically arranged with the center line of the base 1, and the movement track of the roller 68 is consistent with the center line of the wedge-shaped block 65;

[0028] Better: the three-layer insulation wires 4 are wound on the specially structured framework 3 through automatic equipment, and then the assembly of the wire package, the runway magnetic sheet 5, the magnetic core 2 and the base 1 (the three-layer insulation wire 4 winding is directly soldered and the foot is out of the bottom of the base 1) is completed by using automatic assembly equipment. When assembling, the runway magnetic sheet 5 is placed between the primary and the secondary to control the size of the leakage inductance, the mounting seat 61 plays a supporting and connecting role, the electric telescopic rod 64 drives the wedge-shaped block 65 to move on the top of the T-shaped rail strip 62, and along with the change of the inclined surface movement track of the wedge-shaped block 65, the roller 68 can be adjusted and rolled along the inclined surface.

[0029] The outer wall of the movable column 66 is sleeved below the L-shaped plate strip 63, and a connecting spring 67 is sleeved below the L-shaped plate strip 63. One end of the connecting spring 67 is fixedly connected with the L-shaped plate strip 63, and the other end of the connecting spring 67 is fixedly connected with a roller 68. The outer wall of the roller 68 is slidingly connected to the top of the wedge-shaped block 65. An arc-shaped groove 69 is formed in the top end of the outer wall of the movable column 66, near the middle of one side of the magnetic core 2. A guide column 610 is fixedly connected to the top of the L-shaped plate strip 63, and the outer wall of the guide column 610 is slidingly connected to the inner wall of the arc-shaped groove 69. A refrigeration sheet 611 is fixedly connected to the top end of the movable column 66.

[0030] The size of the arc-shaped groove 69 and the guide column 610 is consistent, and the material of the refrigeration sheet 611 is selected from bismuth telluride.

[0031] More preferably, as the roller 68 moves on the inclined surface, the movable column 66 can be moved in the vertical direction by extruding the connecting spring 67, and the movable column 66 can be moved more stably with the auxiliary cooperation of the arc-shaped groove 69 and the guide column 610, thereby driving the refrigeration sheet 611 to approach or move away from the LLC transformer. For the corresponding mode, when the LLC transformer is in operation, the refrigeration sheet 611 is adjusted to approach the LLC transformer to disperse and eliminate the heat accumulated by the LLC transformer. Conversely, when maintenance is needed, the refrigeration sheet 611 can be moved away from the LLC transformer, so that enough space is left above to facilitate the operation of the staff.

[0032] The working principle of the above implementation is as follows:

[0033] The working steps are as follows:

[0034] Multi-strand three-layer insulated wire 4 is wound on the specially structured skeleton 3 by automatic equipment, and then the assembly of the wire package, the runway magnetic sheet 5, the magnetic core 2, the base 1 (the three-layer insulated wire 4 winding is directly soldered and the feet are out from the bottom of the base 1) is completed by using automatic assembly equipment, the runway magnetic sheet 5 is placed between the primary and the secondary during assembly to control the size of the leakage inductance, the mounting seat 61 plays a supporting and connecting role, the electric telescopic rod 64 drives the wedge-shaped block 65 to move on the top of the T-shaped rail 62, along with the change of the inclined surface movement track of the wedge-shaped block 65, the roller 68 can be adjusted and rolled along the inclined surface, along with the movement of the roller 68 on the inclined surface, the movable column 66 can be moved in the vertical direction by extruding the connecting spring 67, and the movable column 66 moves more stably under the auxiliary cooperation of the arc surface groove 69 and the guide column 610, thereby driving the refrigeration sheet 611 to approach or move away from the LLC transformer, for the corresponding mode, when the LLC transformer is in the operation and use process, the refrigeration sheet 611 is adjusted to approach the LLC transformer, and the accumulated heat generated by the LLC transformer is dispersed and eliminated, on the contrary, when maintenance is needed, the refrigeration sheet 611 can move away from the LLC transformer, so that enough space is left above to facilitate the operation of the staff.

[0035] It should be noted that, in the present document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0036] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the changes in form and details of the embodiments can be made by those skilled in the art without departing from the spirit and scope of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A novel LLC transformer, characterized in that: The system includes a base (1) and two magnetic cores (2). The magnetic cores (2) on both sides are fixedly connected to the inner wall of the base (1). A frame (3) is fixedly connected to the top of each magnetic core (2). Multiple triple-insulated wires (4) are provided on both sides of the middle portion of the base (1). Several magnetic sheets (5) are provided in the middle of the inner wall of the base (1). A protective maintenance assembly for the overall maintenance of the LLC transformer is provided on the outer wall of the base (1). The protection and maintenance component includes a mounting base (61), which is fixedly connected to the outer wall of the magnetic core (2) on any side. An L-shaped strip (63) is fixedly connected to the top of the mounting base (61), and an electric telescopic rod (64) is fixedly connected to the middle of the L-shaped strip (63). A wedge block (65) is fixedly connected to the driving end of the electric telescopic rod (64). A T-shaped rail (62) is fixedly connected to the top center of the mounting base (61), and the wedge block (65) is slidably connected to the top of the T-shaped rail (62). A movable column (66) is slidably connected to the middle of the L-shaped strip (63), and a roller (68) is fixedly connected to the bottom end of the movable column (66).

2. A novel LLC transformer according to claim 1, characterized in that: The outer wall of the movable column (66) is fitted with a connecting spring (67) below the L-shaped strip (63).

3. A novel LLC transformer according to claim 2, characterized in that: One end of the connecting spring (67) is fixedly connected to the L-shaped strip (63), and the other end of the connecting spring (67) is fixedly connected to the roller (68).

4. A novel LLC transformer according to claim 3, characterized in that: The outer wall of the roller (68) is slidably connected to the top of the wedge block (65), and an arc-shaped groove (69) is provided in the middle of the outer wall of the top of the movable column (66) near the magnetic core (2).

5. A novel LLC transformer according to claim 4, characterized in that: The top of the L-shaped strip (63) is fixedly connected to a guide post (610), and the outer wall of the guide post (610) is slidably connected to the inner wall of the arc-shaped groove (69).

6. A novel LLC transformer according to claim 5, characterized in that: A cooling plate (611) is fixedly connected to the top of the movable column (66).

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