An AC to DC module

Abstract

The utility model relates to the technical field of AC-DC conversion, and discloses an AC-DC module, including a bottom shell, a secondary coil is arranged on the right side of the lower circuit board, an upper circuit board is arranged on the right side of the secondary coil, a second insulating sheet is arranged on the right side of the upper circuit board, a second transformer core is arranged on the right side of the second insulating sheet, an upper shell is arranged on the right side of the second transformer core, and the bottom shell and the upper shell are tightly buckled during assembly. This AC-DC module can directly design the traditional wire-wound transformer coil onto the printed circuit board, directly integrate the circuit routing part and the transformer coil onto the same printed circuit board PCB, and use multiple (two to three) multi-layer (generally four-layer) printed circuit boards to overlap to realize the transformer coil, solving the problem of how to reduce the overall volume and reduce costs, and the product can be standardized and integrated, shorten the development cycle, and simplify production and manufacturing.

Description

Technical Field

[0001] The utility model relates to the technical field of AC-DC conversion, in particular to an AC-DC conversion module. Background Art

[0002] The switching power supply is one of the most common and common circuit forms. Its main function is to convert alternating current (AC) power into direct current (DC) power. The basic structure of the circuit consists of six main circuits: AC input filter circuit, AC rectifier filter circuit, AC-DC conversion (PWM) control circuit, transformer, secondary rectifier circuit, and primary voltage reference control. Among them, the AC-DC conversion (PWM) control circuit, transformer, secondary rectifier circuit, and primary voltage reference control are the core and key circuits, which play a decisive role in the core parameters of the switching power supply, such as EMI, temperature rise, efficiency, reliability, and cost. The AC-DC conversion (PWM) and control circuit, transformer, secondary rectifier circuit, and primary voltage reference control are packaged together and equipped with a shell to form an AC-DC power module.

[0003] However, the existing AC-DC modules still have the problem in actual use that they only implement simple circuit packaging, which increases the overall volume and brings additional cost increases.

[0004] For this purpose, the utility model introduces an AC to DC module. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an AC-to-DC module, which has the advantages of being able to simplify packaging and reduce costs, and solves the problems raised in the background technology.

[0006] The utility model provides the following technical solution: an AC-DC module, comprising a bottom shell, a first transformer core is arranged on the right side of the bottom shell, a first insulating sheet is arranged inside the first transformer core, a lower circuit board is arranged on the right side of the first insulating sheet, the inside of the first transformer core is clamped with the outer surface of the lower circuit board, a circuit board connector is arranged inside the bottom shell, a transformer secondary coil is arranged inside the bottom shell, and in some application occasions, the transformer secondary coil can also be implemented by a printed circuit board PCB, and in some application occasions, the transformer secondary coil can also be implemented by a copper sheet plus insulation. The transformer secondary coil is wound with three layers of insulating wire, an upper circuit board is arranged on the right side of the transformer secondary coil, the upper circuit board and the lower circuit board are connected through a circuit board connector, the output lead of the transformer secondary coil is welded on the upper circuit board or the lower circuit board and located between the two, a second insulating sheet is arranged inside the bottom shell, a second transformer core is arranged on the right side of the second insulating sheet, the inside of the second transformer core is clamped with the outer surface of the upper circuit board, and the upper shell is clamped on the right side of the bottom shell. In some applications, heat dissipation glue is poured into the bottom shell and the upper shell to facilitate heat conduction of the entire module.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] 1. This kind of AC-DC module, based on reality, can design the traditional wire-wound transformer coil directly onto the printed circuit board, directly integrate the circuit wiring part and the transformer coil onto the same printed circuit board PCB, and use multiple (two to three) multi-layer (generally four-layer) printed circuit boards to realize the transformer coil, and combine the transformer coil wiring and circuit wiring together, while achieving volume reduction, it also controls the cost. At the same time, it solves the problem of how to reduce the overall volume and reduce the cost, and the product can be standardized and integrated, shorten the development cycle, simplify the finished product production, improve the manufacturing efficiency, and achieve the effect of reducing the manufacturing cost in practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0010] Figure 2 For this utility model Figure 1 Schematic diagram of the internal structure;

[0011] Figure 3 For this utility model Figure 2 Schematic diagram of the circuit structure of the upper circuit board and the lower circuit board.

[0012] In the figure: 1, bottom shell; 2, first transformer core; 3, first insulating sheet; 4, upper circuit board; 5, circuit board connector; 6, transformer secondary coil; 7, lower circuit board; 8, second insulating sheet; 9, second transformer core; 10, upper shell. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] See also Figure 1 and Figure 2 An AC-DC module includes a bottom shell 1, a first transformer core 2 is arranged on the right side of the bottom shell 1, a first insulating sheet 3 is arranged inside the first transformer core 2, a lower circuit board 7 is arranged on the right side of the first insulating sheet 3, the inside of the first transformer core 2 is clamped with the outer surface of the lower circuit board 7, a circuit board connector 5 is arranged inside the bottom shell 1, a transformer secondary coil 6 is arranged inside the bottom shell 1, in some application occasions, the transformer secondary coil 6 can also be implemented by a printed circuit board PCB, in some application occasions, the transformer secondary coil 6 can also be implemented by a copper sheet plus insulation, in this embodiment, the transformer secondary coil 6 is wound by three layers of insulating wire, an upper circuit board 4 is arranged on the right side of the transformer secondary coil 6, and the upper circuit board 4 The bottom shell 1 is connected to the lower circuit board 7 through a circuit board connector 5, the output lead of the transformer secondary coil 6 is welded on the upper circuit board 4 or the lower circuit board 7 and is located between the two, a second insulating sheet 8 is arranged inside the bottom shell 1, and a second transformer core 9 is arranged on the right side of the second insulating sheet 8. The inside of the second transformer core 9 is clamped with the outer surface of the upper circuit board 4, and the upper shell 10 is clamped on the right side of the bottom shell 1. In some applications, heat dissipation glue will be poured into the bottom shell 1 and the upper shell 10, which is beneficial to the heat conduction of the entire module, so that the product can be standardized and integrated, the development cycle can be shortened, and the product volume can be reduced during production, which is beneficial to product miniaturization, especially suitable for ultra-thin products. The modular design makes product manufacturing simple, the production efficiency is improved, and the manufacturing cost is reduced.

[0015] See also Figure 3 The upper circuit board 4 and the lower circuit board 7 shown in the figure integrate the AC-DC conversion (PWM) control circuit, the secondary rectification circuit, and the primary voltage reference control.

[0016] Working principle: when in use, the first transformer core 2, the first insulating sheet 3, the upper circuit board 4, the circuit board connector 5, the transformer secondary coil 6, the lower circuit board 7, the second insulating sheet 8 and the second transformer core 9 can be installed between the bottom shell 1 and the inside of the upper shell 10, and when installing, the transformer secondary coil 6 is welded on the upper circuit board 4 or the lower circuit board 7, the first transformer core 2 and the second transformer core 9 are directly clamped on the outer surface of the upper circuit board 4 and the lower circuit board 7, and the upper circuit board 4 and the lower circuit board 7 are connected to each other through the circuit board connector 5, and finally, the first transformer core 2, the second transformer core 9 and the upper circuit board 4 and the lower circuit board 7 are placed with the first insulating sheet 3 and the second insulating sheet 8, and then the bottom shell 1 and the upper shell 10 are connected, and the whole can be used.

[0017] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0018] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An AC to DC module, characterized in that: The invention comprises a bottom shell (1), a first transformer magnetic core (2) is arranged on the right side of the bottom shell (1), a first insulating sheet (3) is arranged inside the first transformer magnetic core (2), a lower circuit board (7) is arranged on the right side of the first insulating sheet (3), the inside of the first transformer magnetic core (2) is clamped with the outer surface of the lower circuit board (7), a circuit board connector (5) is arranged inside the bottom shell (1), a transformer secondary coil (6) is arranged inside the bottom shell (1), the transformer secondary coil (6) is wound with three layers of insulating wire, and the transformer secondary coil (6) is wound with three layers of insulating wire. An upper circuit board (4) is arranged on the right side of the coil (6); the upper circuit board (4) and the lower circuit board (7) are connected via a circuit board connector (5); the output lead of the transformer secondary coil (6) is welded on the upper circuit board (4) or the lower circuit board (7) and is located between the two; a second insulating sheet (8) is arranged inside the bottom shell (1); a second transformer magnetic core (9) is arranged on the right side of the second insulating sheet (8); the interior of the second transformer magnetic core (9) is clamped with the outer surface of the upper circuit board (4); and an upper shell (10) is clamped on the right side of the bottom shell (1).

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