Output type large-current flat coil transformer

Abstract

The utility model discloses an output type large-current flat coil transformer, which comprises a magnetic core and two coils, an insulating plate is arranged between the magnetic core and the coils, the two coils are respectively wound on the two sides of the magnetic core, the winding directions of the two coils are opposite, the winding inlet and the winding outlet of the coils are both bent inwards and attached to the magnetic core, and the magnetic core is connected with the insulating plate. Heat dissipation assemblies are further arranged on the two sides of the magnetic core, each heat dissipation assembly comprises a heat conduction piece attached to the magnetic core and heat dissipation fins connected with the heat conduction piece, heat dissipation channels used for heat dissipation are further arranged in the heat dissipation assemblies and penetrate through the heat conduction pieces and the heat dissipation fins, and a bottom plate is further fixedly connected to the bottom of the magnetic core. The base plate is further provided with a plurality of pins used for being connected with an external circuit, tightness between the coil and the magnetic core is effectively improved, electromagnetic interference is reduced, efficiency of the transformer is improved, the heat dissipation effect is enhanced due to the arrangement of the heat dissipation assembly, and stability and reliability of the transformer during high-load operation are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of large current transformer, concretely is a flat coil transformer of output type large current. BACKGROUND

[0002] Transformer is the device that uses the principle of electromagnetic induction to change AC voltage, and the main components are primary coil, secondary coil and core (magnetic core). Main functions include: voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer) and the like.

[0003] The transformer of traditional technology uses framework structure, and the space utilization rate of transformer is low, and higher height is needed to meet the power output of transformer, and the installation reliability of the framework type structure is poor, and the winding of the framework type transformer is made, and larger transformer structure is needed to meet the requirements, the framework is plastic material, and the heat dissipation performance is poor, the internal heat of the transformer cannot be dissipated, the temperature of the transformer body is high, the copper wire section area is needed to compensate the core loss, and then the cost and the size of the transformer are increased. UTILITY MODEL CONTENT

[0004] The utility model discloses a flat coil transformer of output type large current to solve the above technical problem.

[0005] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a flat coil transformer of output type large current, including the core and two coils, the core and coil are provided with the insulating plate, two coils are wound on the both sides of the core respectively, and the winding direction of two coils is opposite, the inlet and outlet of coil winding are all bent inward and fit the core, the both sides of the core are also provided with the heat dissipation component, the heat dissipation component includes the heat conduction sheet that fits the core and the heat dissipation fin that connects the heat conduction sheet, the heat dissipation channel for heat dissipation is also provided in the heat dissipation component, the heat dissipation channel penetrates the heat conduction sheet and the heat dissipation fin, the bottom of the core is also fixedly connected with the bottom plate, and a plurality of pins for connecting with external circuit are also provided on the bottom plate.

[0006] Preferably, the heat dissipation channel is a spiral structure, the heat conduction sheet is made of high thermal conductivity material, and the heat dissipation fin is a sheet structure and is provided with a plurality of.

[0007] Preferably, an insulating column for isolation is arranged between the two coils.

[0008] Preferably, the number of turns of the two coils is the same.

[0009] Preferably, the insulating plate is an epoxy plate.

[0010] Preferably, the coil is wound by a flat coil.

[0011] Preferably, the bottom plate side wall is fixed with a limiting plate, the limiting plate is provided with a pin positioning plate for fixing the pin, and the limiting plate is provided with a mounting hole on the side of the pin positioning plate.

[0012] Preferably, the bottom plate, the magnetic core and the pin are fixed by epoxy glue.

[0013] Compared with the prior art, the output type large current flat coil transformer has the following beneficial effects:

[0014] The output type large current flat coil transformer has the advantages of compact structure, effective tightness between the coil and the magnetic core by inwardly bending and adhering the magnetic core at the inlet and outlet of the coil winding, reduced electromagnetic interference, improved efficiency of the transformer, greatly enhanced heat dissipation effect by the setting of the heat dissipation assembly, especially the spiral heat dissipation channel, and ensured stability and reliability of the transformer in high load operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0016] Figure 1 is a whole schematic view of an output type large current flat coil transformer of the embodiment;

[0017] Figure 2 is a front view of an output type large current flat coil transformer of the embodiment;

[0018] Figure 3 is a top view of an output type large current flat coil transformer of the embodiment;

[0019] Figure 4 is an internal schematic view of a heat dissipation assembly in an output type large current flat coil transformer of the embodiment;

[0020] Figure 5 is a winding schematic view of a coil in an output type large current flat coil transformer of the embodiment.

[0021] In the drawings, the components represented by each reference numeral are listed as follows:

[0022] 1, magnetic core; 2, coil; 3, insulating plate; 4, heat dissipation assembly; 5, heat conduction sheet; 6, heat dissipation fin; 7, heat dissipation channel; 8, bottom plate; 9, pin; 10, insulating column; 11, limiting plate; 12, pin positioning plate; 13, mounting hole. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be apparently 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 other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a kind of output type large current flat coil transformer, including magnetic core 1 and two coils 2, magnetic core 1 and coil 2 between being provided with insulating plate 3, two coils 2 are wound in the two sides of magnetic core 1 respectively, and the winding direction of two coils 2 is opposite, the inlet and outlet of coil 2 are bent inward and adhere to magnetic core 1, magnetic core 1 two sides are also provided with heat dissipation component 4, heat dissipation component 4 includes the heat conduction sheet 5 of adhering magnetic core 1 and the heat dissipation fin 6 of connecting heat conduction sheet 5, heat dissipation channel 7 for dissipating heat is also provided in heat dissipation component 4, heat dissipation channel 7 penetrates heat conduction sheet 5 and heat dissipation fin 6, magnetic core 1 bottom is also fixedly connected with bottom plate 8, bottom plate 8 is also provided with several pins 9 for being connected with external circuit.

[0025] Specifically, heat dissipation channel 7 is spiral structure, heat conduction sheet 5 is made of high thermal conductivity material, heat dissipation fin 6 is sheet structure, and multiple are provided, by the above setting, the heat generated by transformer can be quickly dissipated through heat dissipation channel 7, heat conduction sheet 5 and heat dissipation fin 6 when working, effectively improve the heat dissipation efficiency of transformer, ensure the working stability and service life of transformer, the spiral heat dissipation channel 7 design increases the heat dissipation area, further improves the heat dissipation effect.

[0026] Specifically, two coils 2 between being provided with the insulating column 10 for isolation, further, the number of turns of two coils 2 is same, by being provided with insulating column 10 between two coils 2, two coils 2 can maintain good electrical isolation when working, avoid the electromagnetic interference between coil 2, ensure the output current stability of transformer, the number of turns of two coils 2 is same, ensure that the output voltage of the two sides of transformer is equal, further improve the performance and stability of transformer.

[0027] Specifically, insulating plate 3 is epoxy plate, epoxy plate not only can provide good insulating property, also has higher mechanical strength and heat resistance, ensure the safety and reliability of transformer in working process, in addition, epoxy plate also has good moisture resistance, can effectively prevent the insulation performance decline due to damp, further prolong the service life of transformer.

[0028] Specifically, the coil 2 is wound in a flat coil 2, greatly reducing the volume and weight of the coil 2, making the entire transformer structure more compact, easy to install and use, the design of the flat coil 2 also improves the heat dissipation efficiency of the coil 2, so that the transformer can dissipate heat more effectively when working, further improving the performance and stability of the transformer, the winding method of the flat coil 2 also makes the inductance of the coil 2 more uniform, reduces the electromagnetic noise of the transformer.

[0029] Specifically, the bottom plate 8 side wall is fixedly provided with a limiting plate 11, the limiting plate 11 is provided with a pin positioning plate 12 for fixing the pin 9, and the limiting plate 11 is provided with a mounting hole 13 on the side of the pin positioning plate 12. Further, the bottom plate 8, the magnetic core 1 and the pin 9 are all fixed by epoxy glue. Through the above-mentioned setting, the overall structure of the transformer is more stable and is not easy to loosen or deform, thereby improving the durability and reliability of the transformer. The design of the pin positioning plate 12 ensures the accurate positioning of the pin 9 during installation, avoiding problems such as poor circuit connection or short circuit caused by deviation of the position of the pin 9, and further improving the safety and stability of the transformer.

[0030] One specific application example of the embodiment is:

[0031] In use, the flat coil 2 transformer is connected to the circuit, the current enters the bottom plate 8 through the pin 9, and then flows through the magnetic core 1 and the two coils 2. Since the winding directions of the two coils 2 are opposite, the magnetic fields generated by them will cancel each other out, thereby reducing electromagnetic interference. When a large current passes through the coil 2, a large amount of heat will be generated, which is quickly transferred to the heat dissipation fins 6 through the heat conduction sheet 5, and then carried away by the air flow in the heat dissipation channel 7, ensuring the stable operation of the transformer. The setting of the insulating plate 3 and the insulating column 10 effectively isolates the electrical connection between the coils 2, preventing short circuit phenomenon. In addition, the design of the limiting plate 11 and the pin 9 positioning plate 12 enables the pin 9 to be firmly fixed on the bottom plate 8, avoiding circuit failure caused by loose pin 9. The entire device has a compact structure and good heat dissipation effect, and is suitable for occasions with large current output.

[0032] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the utility model, unless another definite provision and limitation, the term "installation", "arrangement", "connection", "fixation", "screw connection" and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation, for the ordinary skill of the person of the art, can understand the above-mentioned term in the utility model specific meaning according to specific circumstances.

[0034] Although the embodiments of the utility model have been shown and described, it will be appreciated by those of ordinary skill in the art that changes can be made to these embodiments without departing from the principles and spirit of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A flat coil transformer of output type and high current, characterized in that: The utility model relates to a magnetic core (1) and two coils (2) are included between the magnetic core (1) and coil (2) are provided with insulating plate (3), two coils (2) are respectively wound in the both sides of magnetic core (1), and the winding direction of two coils (2) is opposite, the import and export of coil (2) are all inwardly bent and adhere to magnetic core (1), the both sides of magnetic core (1) are further provided with heat dissipation assembly (4), heat dissipation assembly (4) includes the heat conduction sheet (5) of adhering magnetic core (1) and the heat dissipation fin (6) of connecting heat conduction sheet (5), heat dissipation assembly (4) inside is further provided with the heat dissipation channel (7) for heat dissipation, the heat dissipation channel (7) penetrates heat conduction sheet (5) and heat dissipation fin (6), the bottom of magnetic core (1) is still fixedly connected with bottom plate (8), bottom plate (8) is still provided with a plurality of pin (9) for connecting with external circuit.

2. The flat coil transformer of claim 1, wherein: The heat dissipation channel (7) is a spiral structure, the heat conduction sheet (5) is made of high thermal conductivity material, the heat dissipation fin (6) is a sheet structure, and a plurality of heat dissipation fins (6) are provided.

3. The flat coil transformer with high output current according to claim 1, characterized in that: Two coils (2) are provided with an insulating column (10) for isolation.

4. The flat coil transformer of claim 1, wherein: The number of turns of two coils (2) is the same.

5. The flat coil transformer of claim 1, wherein: the first and second primary coils are formed by a plurality of turns of wire; and the first and second secondary coils are formed by a plurality of turns of wire. The insulating plate (3) is an epoxy plate.

6. The flat coil transformer of claim 1, wherein: The coil (2) is wound by a flat coil.

7. The flat coil transformer of claim 1, wherein: the first and second primary coils are formed by a plurality of turns of wire; and the first and second secondary coils are formed by a plurality of turns of wire. The bottom plate (8) is provided with a limiting plate (11) on the side wall, the limiting plate (11) is provided with a pin positioning plate (12) for fixing the pin (9), and the limiting plate (11) is provided with a mounting hole (13) on the side of the pin positioning plate (12).

8. The flat coil transformer of claim 1, wherein: The bottom plate (8), the magnetic core (1) and the pin (9) are fixed by epoxy glue.

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