CN116721843A

CN116721843A - Magnetic core planarization high-frequency switch transformer

Info

Publication number: CN116721843A
Application number: CN202310996058.5A
Authority: CN
Inventors: 薛志辉
Original assignee: Shenzhen Wzy Technology Co ltd
Current assignee: Shenzhen Wzy Technology Co ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2023-09-08
Anticipated expiration: 2043-08-09
Also published as: CN116721843B

Abstract

The invention discloses a magnetic core planarization high-frequency switch transformer which comprises a limiting shell and a base, wherein the outer side of the bottom of the limiting shell is fixedly clamped with the outer side of the top of the base, and a segmented magnetic core is arranged between the limiting shell and the base. The invention realizes that the magnetic powder in the phase-change heat-conducting material spreads outwards due to the action of magnetic attraction and gathers on the inner side surface of the insulating bag to form a compact magnetic powder layer, so that the insulating bag and the phase-change heat-conducting material filled in the insulating bag are tightly attached to the surface of the PCB, thereby facilitating heat conduction, and the magnetic powder tightly attached to the surface of the PCB is tightly extruded by the action of magnetic attraction until gathering into a protective layer on the inner side surface of the insulating bag, avoiding damaging the insulating bag due to scraping on the outer side, and supporting the insulating bag after being heated and softened, thereby ensuring that the air gap between every two adjacent PCBs and between the secondary winding and the primary winding is unchanged, further ensuring that the magnetic fluxes in the secondary winding and the primary winding are completely coupled, and reducing leakage inductance of the transformer.

Description

Magnetic core planarization high-frequency switch transformer

Technical Field

The invention relates to the technical field of transformers, in particular to a magnetic core planarization high-frequency switch transformer.

Background

The planar transformer is a novel high-frequency ferrite inductance element which is tried to be used in the industry all the time, and compared with the conventional transformer, the planar transformer has the advantages of high current density, high efficiency, low leakage inductance, small heating value, good heat dissipation and the like besides the advantages of structural volume. The planar transformer has square shape, is suitable for planar mounting, is convenient to design, and can realize light, thin and miniaturized electronic products of various types. Based on these performance advantages, planar transformers have attracted attention and realize small-scale applications in various fields of consumer electronics, automotive electronics, medical devices, industrial control, and the like.

In the prior art, for example, the Chinese patent number is: the utility model provides a "magnetic core planarization high frequency switch transformer" of CN210006577U, includes the base, the magnetic core base has been placed to the upper surface of base, two lower magnetic core grooves have been seted up to the upper surface of magnetic core base, two the flat magnetic core has all been pegged graft in the inslot of lower magnetic core groove, two the surface of flat magnetic core has all been twined the coil winding, two insulating core upper cover has been cup jointed at the top of flat magnetic core, two upper magnetic core grooves have been seted up to the lower surface of insulating core upper cover, two the top of flat magnetic core is pegged graft respectively in the inslot of two upper magnetic core grooves, insulating core upper cover both sides joint has insulating side cap, two insulating side cap all is connected with the base detachable through the bolt, two the inboard of insulating side cap has the interior curb plate. Through the cooperation of the above structures, the device has the advantages of thin thickness, stable structure, convenient disassembly and assembly, insulation, strong anti-interference capability and quick heat dissipation.

But in the prior art, the insulating film needs to be arranged between the adjacent PCBs to realize electrical insulation between the adjacent PCBs, namely, an air gap is formed, and the insulating film is easy to be heated and deformed or aged and aggravated in the actual use process, so that the insulating film with the edge part torn by external parts is extremely easy to damage/crack, the insulating effect is lost, the insulating film and the phase change material inside the insulating film are flexible, and the insulating film is difficult to be flatly attached to the PCBs in the actual assembly process, thereby greatly reducing the assembly efficiency of the planar transformer and improving the manufacturing cost of the planar transformer.

Disclosure of Invention

The invention aims to provide a magnetic core planarization high-frequency switch transformer, which aims to solve the problems that an insulating film is required to be arranged between adjacent PCB boards in the planar transformer provided by the background technology so as to realize electrical insulation between the adjacent PCB boards, namely an air gap is formed, the insulating film is easy to deform by heating or aggravate aging in the actual use process, the edge part is easily damaged/broken by tearing of external parts, the insulating effect is lost, the insulating film and the phase change material in the insulating film are flexible, the insulating film is difficult to be flatly attached to the PCB boards in the actual assembly process, the assembly efficiency of the planar transformer is greatly reduced, and the manufacturing cost of the planar transformer is improved.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a magnetic core planarization high frequency switch transformer, including spacing shell spare and base, the bottom outside of spacing shell spare and the outside fixed joint in top of base, and be equipped with the segmentation magnetic core between spacing shell spare and the base, the segmentation magnetic core comprises magnetic core a with spacing shell spare lower surface fixed connection and magnetic core b with base upper surface fixed connection, and the bottom of magnetic core a and the inboard fixed joint in top of magnetic core b, the outside fixed cup joint of segmentation magnetic core has secondary winding and primary winding, and the bottom of secondary winding and primary winding top fixed connection, the secondary winding includes a plurality of PCB boards, every the top of PCB board is all fixedly connected with secondary coil, and all fixed joint has an insulation component between every two PCB boards, every PCB board and insulation component's axle center department all with the outside fixed joint of segmentation magnetic core, and every insulation component all includes the edge lantern ring and the insulating bag of inboard bonding, and the insulating bag is by the cavity form structure of elastic polymer plastics, the inboard of insulating bag is filled with the heat-conducting material, and the inside of heat-conducting material has filled with secondary winding and primary winding, the inside has a plurality of ring grooves to be equipped with inside the magnetic powder, every ring groove is all fixed with inside the core; when the primary winding is connected with current to generate electromagnetic induction, the magnetic powder in the phase-change heat-conducting material which becomes a flowing state is spread outwards due to the action of magnetic attraction and is converged on the inner side surface of the insulating bag to form a compact magnetic powder layer, so that the insulating bag and the phase-change heat-conducting material filled in the insulating bag are tightly attached to the surface of the PCB, heat conduction is facilitated, the phase-change heat-conducting material and the magnetic powder have extremely low thermal resistance and optimal heat conduction action, and heat dissipation of the secondary winding during operation is accelerated. Then, the magnetic powder tightly attached to the surface of the PCB is still subjected to the action of magnetic attraction, so that the magnetic powder is tightly extruded mutually until a layer of protective layer is converged on the inner side surface of the insulating bag, the insulating bag is prevented from being damaged due to scraping at the outer side, the heated and softened insulating bag is supported up, the air gap between every two adjacent PCBs is kept unchanged, the secondary winding and the primary winding are enabled to be completely coupled with the magnetic flux in the secondary winding, and leakage inductance of the transformer is reduced.

Preferably, the bottom integrated into one piece of magnetic core a has embedded fixture block, and the bottom of embedded fixture block and the inboard fixed joint of magnetic core b.

Preferably, a plurality of heat dissipation holes a are uniformly formed in the bottoms of the two sides of the limiting shell in a penetrating mode, a plurality of heat dissipation holes b are uniformly formed in the tops of the two sides of the base in a penetrating mode, and the bottoms of the heat dissipation holes a are overlapped with the tops of the heat dissipation holes b.

Preferably, the outer bottom of the limiting shell is uniformly integrated into one piece with a plurality of inserting blocks, a plurality of limiting grooves are uniformly formed in the outer top of the base, and the inner side of each limiting groove is fixedly clamped with the bottom of one inserting block.

Preferably, the primary winding comprises a primary coil and a bottom plate fixedly clamped at the bottom of the primary coil, an access port is fixedly arranged at one end of the primary coil, a clamping groove is formed in the inner side of the bottom plate in a penetrating mode, and the inner side of the clamping groove is fixedly clamped with the outer side of the magnetic core b.

Preferably, each of the PCB boards and one end of the secondary coil are provided with a break groove in a penetrating manner, each of the insulating assemblies is provided with a copper gasket in a fixed manner on the inner side of one end of the insulating assembly, the bottom of the copper gasket is fixedly connected with the top of the secondary coil, two groups of jacks are symmetrically provided on two sides of each break groove in a penetrating manner, one group of jacks is provided with a positive electrode wiring member in a fixed manner on the inner side of the jack, and the other group of jacks is provided with a negative electrode wiring member in a fixed manner on the inner side of the jack.

Preferably, the positive electrode wiring member comprises a metal conductive sheet a and a conductive column a fixedly arranged at the bottom of the metal conductive sheet a, a plurality of positive electrode leads are uniformly welded on one side of the metal conductive sheet a, the negative electrode wiring member comprises a metal conductive sheet b and a conductive column b fixedly arranged at the bottom of the metal conductive sheet b, and a plurality of negative electrode leads are uniformly welded on one side of the metal conductive sheet b.

Preferably, a plurality of positive electrode pins are uniformly and fixedly installed at the bottom of one side of the base, the bottom of the positive electrode pins is fixedly connected with one end of the positive electrode lead, a plurality of negative electrode pins are uniformly and fixedly installed at the bottom of the other side of the base, and one end of each negative electrode pin is fixedly connected with one end of each negative electrode lead.

Preferably, each of the outer sides of the PCB boards is provided with a plurality of heat conduction holes in a penetrating mode, the outer side edge of each of the PCB boards is fixedly sleeved with an insulating ring, and the outer sides of the insulating rings are movably clamped with the outer sides of the edge lantern rings.

Preferably, the axes of the jack groups positioned on the same side of the breaking groove are all on the same straight line, one group of jack groups is fixedly inserted with one end of the conductive column a, and the other group of jack groups is fixedly inserted with one end of the conductive column b.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, through the arranged secondary winding, when the primary winding is connected with current to generate electromagnetic induction, the magnetic powder in the phase-change heat-conducting material which becomes a flowing state is spread outwards due to the action of magnetic attraction and is converged on the inner side surface of the insulating bag to form a compact magnetic powder layer, so that the insulating bag and the phase-change heat-conducting material filled in the insulating bag are tightly attached to the surface of the PCB, heat conduction is facilitated, and the heat dissipation of the secondary winding during working is accelerated by utilizing the extremely low thermal resistance and the optimal heat conduction action of the phase-change heat-conducting material and the magnetic powder.

According to the invention, through the secondary winding, the magnetic powder closely attached to the surface of the PCB is still subjected to the action of magnetic attraction, so that the magnetic powder is tightly extruded mutually until the inner side surface of the insulating bag is converged into a layer of protective layer, the insulating bag is prevented from being damaged by scraping outside, and the insulating bag after being heated and softened is supported up, so that the air gap between the secondary winding and the primary winding is kept unchanged between every two adjacent PCBs, and therefore, the secondary winding and the magnetic flux in the secondary winding are completely coupled, and leakage inductance of the transformer is reduced.

3. According to the invention, through the arranged secondary windings, the insulation assemblies for insulating and forming an air gap are arranged between every two PCBs, and the phase change heat conducting material is filled in the insulation bags of each insulation assembly, when the temperature is higher than a phase change point, the phase change heat conducting material absorbs heat and changes in morphology, the solid state is changed into a flowing state, and when the temperature is lower than the phase change point, the phase change heat conducting material releases heat, and the flowing state is changed into the solid state, so that the phase change performance of the phase change heat conducting material can be utilized to assist the rapid heat dissipation in the transformer when the secondary windings and the primary windings generate heat, so that the burning condition is prevented, and the service life and the safety of the device are improved.

4. According to the invention, through the arranged secondary winding, the accurate limiting assembly can be completed by stacking the primary winding, each PCB and the insulating component layer by layer on the top of the base in sequence and vertically inserting the inserting block of the combined limiting shell into the limiting groove when the high-frequency switch transformer is assembled, and the insulating layer is not required to be flatly adhered to the surface of the PCB, so that the manufacturing difficulty is reduced, and the production cost is saved.

Drawings

FIG. 1 is a schematic diagram of a core-planarized high frequency switching transformer in accordance with the present invention;

FIG. 2 is a schematic diagram showing a disassembled structure of a core-planarized high frequency switching transformer according to the present invention;

FIG. 3 is a schematic diagram of an assembled structure of a core-planarized high frequency switching transformer containment vessel and chassis in accordance with the present invention;

FIG. 4 is a schematic diagram of the primary winding of a core-planarized high frequency switching transformer in accordance with the present invention;

FIG. 5 is a schematic diagram showing the secondary winding of a core-planarized high frequency switching transformer according to the present invention with its structure broken away;

FIG. 6 is a schematic diagram of a partially cut-away structure of a secondary winding of a core-planarized high frequency switching transformer in accordance with the present invention;

FIG. 7 is a schematic diagram of the structure of the positive and negative pole connection members of the magnetic core planarization high frequency switch transformer;

FIG. 8 is a schematic diagram of the assembled structure of a secondary winding of a core-planarized high frequency switching transformer in accordance with the present invention;

FIG. 9 is a schematic circuit diagram of a positive pin of a core-planarized high frequency switching transformer in accordance with the present invention;

FIG. 10 is a schematic circuit diagram of a negative pin of a core-planarized high frequency switching transformer in accordance with the present invention;

fig. 11 is a schematic cross-sectional view of a core-planarized high frequency switching transformer insulation assembly of the present invention.

In the figure:

1. a limiting shell member; 10. a heat radiation hole a; 11. inserting blocks;

2. a segmented magnetic core; 20. a magnetic core a; 201. a ring groove; 202. a clamping block is embedded; 21. a magnetic core b;

3. a secondary winding; 30. a PCB board; 31. a breaking groove; 32. an insulating ring; 33. a secondary coil; 34. a heat conduction hole; 35. a jack group; 36. an insulating assembly; 37. a copper gasket; 360. an edge collar; 361. an insulation bag; 362. a phase change thermally conductive material; 363. magnetic powder;

4. a primary winding; 40. a bottom plate; 41. a clamping groove; 42. a primary coil; 43. an access port;

5. a base; 50. a limit groove; 51. a positive electrode pin; 52. a negative electrode pin; 53. a heat radiation hole b;

6. a positive electrode wiring member; 60. a metal conductive sheet a; 61. a positive electrode lead; 62. a conductive column a;

7. a negative electrode wiring member; 70. a metal conductive sheet b; 71. a conductive post b; 72. and a negative electrode lead.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-11: the utility model provides a magnetic core planarization high frequency switch transformer, including spacing shell 1 and base 5, spacing shell 1's bottom outside and the top outside fixed joint of base 5, and be equipped with segmentation magnetic core 2 between spacing shell 1 and the base 5, segmentation magnetic core 2 comprises magnetic core a20 and the magnetic core b21 of being connected with spacing shell 1 lower surface fixed connection and base 5 upper surface fixed connection, and the bottom of magnetic core a20 and the inboard fixed joint of top of magnetic core b21, secondary winding 3 and primary winding 4 have been cup jointed to segmentation magnetic core 2's outside fixed, and secondary winding 3's bottom and primary winding 4 top fixed connection, secondary winding 3 includes a plurality of PCB boards 30, the top of every PCB board 30 all is fixedly connected with secondary coil 33, and all fixed joint has an insulation component 36 between every two PCB boards 30, the axle center department of every PCB board 30 and insulation component 36 all is with segmentation magnetic core 2's outside fixed joint, and every insulation component 36 all includes edge collar 360 and inboard insulation bag 361, and insulation bag 361 of elastic polymer bonding is made by the cavity form structure of core b, phase change material has a plurality of ring grooves 201 and inside of phase change material 362, phase change material 201 and inside of each core 201 has a fixed ring groove 201 and inside of phase change material 362 are filled; when the transformer is used in a high-frequency switch, the primary winding 4 is externally connected with a power supply, electric energy input into the transformer is converted into magnetic energy, the secondary winding 3 can induce electric energy due to the magnetic energy and is transmitted to an external switch circuit, the secondary winding 3 is formed by a plurality of PCBs 30 and secondary coils 33 on the surfaces of the PCBs, insulation assemblies 36 for insulating and forming air gaps are arranged between every two PCBs 30, phase-change heat-conducting materials 362 are filled in insulation bags 361 of each insulation assembly 36, the phase-change heat-conducting materials 362 are thermal interface materials formed by silicon-free substrates, when the temperature is higher than a phase-change point, the phase-change heat-conducting materials 362 absorb heat, the morphology changes from a solid state to a flowing state, when the temperature is lower than the phase-change point, the phase-change heat-conducting materials 362 release heat from the flowing state to the solid state, and the phase-change properties of the phase-change materials can be utilized to assist rapid heat dissipation in the transformer when heat is generated by the secondary winding 3 and the primary winding 4, so as to prevent burning.

Meanwhile, when the primary winding 4 is connected with current to work and generates electromagnetic induction, the phase change heat conduction material 362 absorbs heat and then becomes a flowing state from a solid state along with the rise of temperature, the magnetic powder 363 in the phase change heat conduction material 362 is also deflected due to the action of magnetic attraction, the magnetic powder 363 is scattered outwards from the central part of the phase change heat conduction material 362 and is converged on the inner side surface of the insulating bag 361 to form a layer of compact magnetic powder 363 layer, the insulating bag 361 is expanded outwards by the initial magnetic powder 363, the insulating bag 361 and the phase change heat conduction material 362 filled in the insulating bag are tightly attached to the surface of the PCB 30 so as to facilitate heat conduction, the phase change heat conduction material 362 and the magnetic powder 363 have extremely low thermal resistance and optimal heat conduction action, the heat dissipation of the secondary winding 3 is accelerated, and after the magnetic powder 363 is tightly attached to the surface of the PCB 30, the magnetic powder 363 still receives the action of magnetic attraction, internal stress is generated between the magnetic powder 363, the magnetic powder 363 is tightly pressed mutually, so that the inner side surface of the insulating bag 361 is converged into a layer with a certain hardness, the insulating bag with reduced thickness after the expansion is avoided, and the insulating bag 361 is tightly attached to the outside/collide is softened, the insulating bag with the surface after the expansion is tightly attached, the insulating bag with the surface of the insulating bag, the phase change heat conduction material 362 is tightly attached to the surface of the PCB 30, and the secondary winding is completely attached to the secondary winding 3, and the magnetic flux leakage is completely and the secondary winding 3 is not attached to the primary winding, and the secondary winding 3.

According to fig. 11, the bottom end of the magnetic core a20 is integrally formed with an embedded clamping block 202, and the bottom of the embedded clamping block 202 is fixedly clamped with the inner side of the magnetic core b21, and the embedded clamping block 202 is used for limiting and installing the magnetic core a20 and the magnetic core b 21.

According to the illustration shown in fig. 3, a plurality of heat dissipation holes a10 are uniformly formed through the bottoms of the two sides of the limiting shell 1, a plurality of heat dissipation holes b53 are uniformly formed through the tops of the two sides of the base 5, the bottoms of the heat dissipation holes a10 are overlapped with the tops of the heat dissipation holes b53, and the heat dissipation holes a10 and the heat dissipation holes b53 corresponding to the bottoms of the heat dissipation holes a10 can form a complete through hole positioned on the two sides of the transformer, so that heat generated by the secondary winding 3 and the primary winding 4 in the transformer is quickened.

According to the illustration in fig. 3, a plurality of insert blocks 11 are uniformly integrated into one piece in the bottom of the outer side of the limiting shell 1, a plurality of limiting grooves 50 are uniformly formed in the top of the outer side of the base 5, and the inner side of each limiting groove 50 is fixedly clamped with the bottom of one insert block 11, when the limiting shell 1 and the base 5 are combined, the insert blocks 11 can be vertically inserted into the limiting grooves 50, and then accurate limiting assembly between the two can be completed.

According to fig. 4, the primary winding 4 includes a primary coil 42 and a bottom plate 40 fixedly clamped at the bottom thereof, an access port 43 is fixedly mounted at one end of the primary coil 42, a clamping slot 41 is formed in the inner side of the bottom plate 40 in a penetrating manner, the inner side of the clamping slot 41 is fixedly clamped with the outer side of the magnetic core b21, the access port 43 is used for being connected with an external power supply, thereby generating an electromagnetic effect, and the clamping slot 41 is used for precisely mounting the primary winding 4.

According to fig. 5, a breaking groove 31 is formed through one end of each PCB board 30 and one end of each secondary coil 33, a copper gasket 37 is fixedly mounted on the inner side of one end of each insulation component 36, the bottom of each copper gasket 37 is fixedly connected with the top of each secondary coil 33, two groups of jack groups 35 are symmetrically formed through two sides of each breaking groove 31, a positive electrode wiring member 6 is fixedly mounted on the inner side of one group of jack groups 35, a negative electrode wiring member 7 is fixedly mounted on the inner side of the other group of jack groups 35, the breaking groove 31 breaks the secondary coil 33 on the top of the PCB board 30, positive and negative poles of each secondary coil 33 can be formed, and each group of secondary coils 33 are connected with the corresponding negative electrode wiring member 7 through the positive electrode wiring member 6 by the copper gasket 37.

According to fig. 7, the positive electrode terminal 6 includes a metal conductive sheet a60 and a conductive post a62 fixedly installed at the bottom thereof, a plurality of positive electrode leads 61 are uniformly welded to one side of the metal conductive sheet a60, the negative electrode terminal 7 includes a metal conductive sheet b70 and a conductive post b71 fixedly installed at the bottom thereof, a plurality of negative electrode leads 72 are uniformly welded to one side of the metal conductive sheet b70, the conductive post a62 is connected to the positive electrode of each secondary coil 33, and the conductive post b71 is connected to the negative electrode of each secondary coil 33.

According to the embodiments shown in fig. 3, 9 and 10, a plurality of positive pins 51 are uniformly and fixedly mounted at the bottom of one side of the base 5, the bottom of the positive pin 51 is fixedly connected with one end of a positive lead 61, a plurality of negative pins 52 are uniformly and fixedly mounted at the bottom of the other side of the base 5, one end of the negative pin 52 is fixedly connected with one end of a negative lead 72, and the positive pin 51 and the negative pin 52 are respectively communicated with corresponding contacts of a switch control circuit for adding the transformer into the switch circuit.

According to the illustration in fig. 5, a plurality of heat conducting holes 34 are formed in the outer side of each PCB 30, and the outer side edge of each PCB 30 is fixedly sleeved with an insulating ring 32, the outer side of the insulating ring 32 is movably clamped with the outer side of an edge collar 360, the plurality of heat conducting holes 34 formed in each PCB 30 can utilize the heat circulation inside the transformer for accelerating heat dissipation, the insulating ring 32 is clamped with an insulating bag 361 between two PCBs 30, the tightness in the transformer is improved, water flow is prevented from directly contacting the PCBs 30 when water is fed, and the insulating bag 361 and the insulating ring 32 block the use safety performance is enhanced.

According to fig. 7, the axes of the jack groups 35 positioned on the same side of the breaking groove 31 are all on the same straight line, one end of a conductive column a62 is fixedly inserted into the inner side of one jack group 35, one end of a conductive column b71 is fixedly inserted into the inner side of the other jack group 35, and the conductive column a62 and the conductive column b71 are used for limiting and installing each PCB 30 to prevent the PCB 30 from deflection dislocation.

The application method and the working principle of the device are as follows: when the high-frequency switch transformer is assembled, accurate limiting assembly can be completed by only stacking the primary winding 4, each PCB 30 and the insulating component 36 on the top of the base 5 layer by layer in sequence and then vertically inserting the inserting block 11 of the combined limiting shell 1 into the limiting groove 50. When the transformer is used in a high-frequency switch, the primary winding 4 is externally connected with a power supply, electric energy input into the transformer is converted into magnetic energy, the secondary winding 3 can induce electric energy due to the magnetic energy and is transmitted to an external switch circuit, the secondary winding 3 is formed by a plurality of PCBs 30 and secondary coils 33 on the surfaces of the PCBs, insulation assemblies 36 for insulating and forming air gaps are arranged between every two PCBs 30, phase-change heat-conducting materials 362 are filled in insulation bags 361 of each insulation assembly 36, the phase-change heat-conducting materials 362 are thermal interface materials formed by silicon-free substrates, when the temperature is higher than a phase-change point, the phase-change heat-conducting materials 362 absorb heat, the morphology changes from a solid state to a flowing state, when the temperature is lower than the phase-change point, the phase-change heat-conducting materials 362 release heat from the flowing state to the solid state, and the phase-change properties of the phase-change materials can be utilized to assist rapid heat dissipation in the transformer when heat is generated by the secondary winding 3 and the primary winding 4, so as to prevent burning.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a magnetic core planarization high frequency switch transformer, includes spacing shell (1) and base (5), its characterized in that, the bottom outside of spacing shell (1) and the top outside fixed joint of base (5), and be equipped with segmentation magnetic core (2) between spacing shell (1) and base (5), segmentation magnetic core (2) by with spacing shell (1) lower surface fixed connection's magnetic core a (20) and with base (5) upper surface fixed connection's magnetic core b (21), and the bottom of magnetic core a (20) and the inboard fixed joint of top of magnetic core b (21), the outside fixed joint of segmentation magnetic core (2) has secondary winding (3) and primary winding (4), and the bottom of secondary winding (3) and primary winding (4) top fixed connection, secondary winding (3) include a plurality of PCB boards (30), the top of each PCB board (30) all is fixedly connected with secondary coil (30), and has fixed joint an insulation subassembly (36) between each two board (30), every insulation subassembly (36) and every the inside fixed joint of PCB board (36) and the core (36) and every fixed subassembly of the center (360) and the outside of the insulation subassembly (360), and insulating bag (361) is by the cavity form structure that elasticity polymer plastic made, the inboard of insulating bag (361) is filled with phase transition heat conduction material (362), and the inside of phase transition heat conduction material (362) is filled with magnetic powder (363), a plurality of annular (201) have all been seted up to the outside of magnetic core a (20) and magnetic core b (21), and the inside of every annular (201) all fixed joint has the inboard of an edge lantern ring (360).

2. The core-planarized high frequency switching transformer of claim 1 wherein: the bottom of magnetic core a (20) integrated into one piece has embedded fixture block (202), and the bottom of embedded fixture block (202) and the inboard fixed joint of magnetic core b (21).

3. The core-planarized high frequency switching transformer of claim 1 wherein: the two sides of the limiting shell (1) are uniformly penetrated and provided with a plurality of radiating holes a (10), the two sides of the base (5) are uniformly penetrated and provided with a plurality of radiating holes b (53), and the bottoms of the radiating holes a (10) are overlapped with the tops of the radiating holes b (53).

4. The core-planarized high frequency switching transformer of claim 1 wherein: the utility model discloses a spacing shell piece, including spacing shell piece (1), a plurality of inserted blocks (11) are evenly integrated into one piece in outside bottom, a plurality of spacing groove (50) have evenly been seted up at the outside top of base (5), and the inboard of every spacing groove (50) all with the fixed joint in bottom of an inserted block (11).

5. The core-planarized high frequency switching transformer of claim 1 wherein: the primary winding (4) comprises a primary coil (42) and a bottom plate (40) fixedly clamped at the bottom of the primary coil, an access port (43) is fixedly arranged at one end of the primary coil (42), a clamping groove (41) is formed in the inner side of the bottom plate (40) in a penetrating mode, and the inner side of the clamping groove (41) is fixedly clamped with the outer side of the magnetic core b (21).

6. The core-planarized high frequency switching transformer of claim 1 wherein: every PCB board (30), the one end of secondary coil (33) all run through and have seted up breaking groove (31), every insulating subassembly (36) one end inboard all fixed mounting have copper gasket (37), and the bottom of copper gasket (37) and the top fixed connection of secondary coil (33), every breaking groove (31) both sides all symmetry run through and have seted up two sets of jack group (35), one of them set of the inboard fixed mounting of jack group (35) has positive pole wiring spare (6), and another set of the inboard fixed mounting of jack group (35) has negative pole wiring spare (7).

7. The core-planarized high frequency switching transformer of claim 6 wherein: the positive electrode wiring piece (6) comprises a metal conducting strip a (60) and a conducting column a (62) fixedly mounted at the bottom of the metal conducting strip a, a plurality of positive electrode leads (61) are uniformly welded on one side of the metal conducting strip a (60), the negative electrode wiring piece (7) comprises a metal conducting strip b (70) and a conducting column b (71) fixedly mounted at the bottom of the metal conducting strip b (70), and a plurality of negative electrode leads (72) are uniformly welded on one side of the metal conducting strip b (70).

8. The core-planarized high frequency switching transformer of claim 6 wherein: a plurality of positive electrode pins (51) are uniformly and fixedly installed at the bottom of one side of the base (5), the bottom ends of the positive electrode pins (51) are fixedly connected with one end of a positive electrode lead (61), a plurality of negative electrode pins (52) are uniformly and fixedly installed at the bottom of the other side of the base (5), and one end of each negative electrode pin (52) is fixedly connected with one end of a negative electrode lead (72).

9. The core-planarized high frequency switching transformer of claim 1 wherein: every the outside of PCB board (30) has all run through and has offered a plurality of heat conduction holes (34), and the outside edge of every PCB board (30) has all fixedly cup jointed insulating ring (32), the outside of insulating ring (32) and the outside activity joint of edge lantern ring (360).

10. The core-planarized high frequency switching transformer of claim 7 wherein: the axes of the jack groups (35) positioned on the same side of the breaking groove (31) are all on the same straight line, one group of jack groups (35) is fixedly inserted with one end of a conductive column a (62), and the other group of jack groups (35) is fixedly inserted with one end of a conductive column b (71).