CN200983504Y - Anti-surge power adapter - Google Patents

Abstract

The utility model relates to a power adapter, in particular, to a surge protection power adapter, including a transformer, and also including a pair of copper sheets for discharging instantaneous surges, connected between the transformer and the power input terminal or on the transformer, with a certain distance between the two copper sheets. The utility model has low cost, simple process, and high reliability. It only needs to connect two copper sheets or PCB (printed circuit board) boards with copper sheets attached in the circuit. The copper sheets are used to discharge instantaneous high voltages, and the reaction speed is fast, and it can withstand 6-17KV instantaneous high voltages. It is suitable for linear and switching power adapters.

Description

An anti-surge power adapter

technical field

The utility model relates to a power adapter, in particular to an anti-surge power adapter.

Background technique

At present, anti-surge, especially power supply products for lightning protection mostly adopt the method of parallel connection of anti-detonator (varistor, RV) (circuit shown in Figure 1) to prevent surge, but the anti-detonator itself bears The capacity is limited, and the performance is not stable enough (slow response, failure after repeated surge voltage), usually the highest surge voltage can only withstand 5-8KV, and it has the disadvantages of large size and high cost. There is also a method of increasing the paint film thickness of the primary coil of the transformer (T) in the power adapter, sticking tape on the starting and ending lines, including sticking tape on the starting and ending lines, wrapping the tail and wrapping the tape, and sleeves to prevent surges. The disadvantages are that the process is complicated, The cost is high, the reliability is poor, and the lightning strike test can only withstand within 10KV.

Contents of the invention

The purpose of the utility model is to provide an anti-surge power adapter with simple process, low cost and good reliability, which can prevent the instantaneous voltage of 6-17KV.

The technical solution adopted by the utility model to solve the technical problem is: an anti-surge power adapter, including a transformer, and also includes a pair of copper sheets for releasing instantaneous surges, connected between the transformer and the input end of the power supply Sometimes or on the transformer, there is a certain distance between the two copper sheets.

As an embodiment of the present invention, one of the pair of copper sheets is connected to the live wire of the power supply, and the other is connected to the neutral wire of the power supply.

As another embodiment of the present invention, one of the pair of copper sheets is connected to the primary of the transformer, and the other is connected to the secondary of the transformer.

As another embodiment of the present invention, a common-mode inductor is connected between the transformer and the input end of the power supply, and one of the pair of copper sheets is connected to a pin of a winding in the common-mode inductor, The other piece is connected to the other pin of the winding; it also includes a pair of copper pieces used to relieve transient surges, one of which is connected to a pin of the other winding in the common mode inductor, and the other piece is connected to The other pin of this winding is connected.

In the present invention, the relative positions of the paired copper sheets may be in a symmetrical zigzag shape.

In the utility model, the copper sheet can be attached to the printed circuit board (PCB).

The beneficial effects of the utility model are: low cost, simple process, high reliability, only need to connect two pieces of copper in the circuit or PCB (printed circuit board) board or other insulating boards with copper attached, and use copper The tablet discharges instantaneous high voltage, and the response speed is fast. After testing, it can withstand the instantaneous high voltage of 6-17KV. The utility model is suitable for linear and switch power adapters.

Description of drawings

FIG. 1 is a schematic diagram of a circuit structure of an existing anti-surge power adapter.

Fig. 2 is a schematic diagram of the circuit structure of an anti-surge power adapter of the present invention.

Fig. 3 is a structural schematic diagram of a PCB board with copper sheets attached in the utility model.

Fig. 4 is a schematic diagram of the circuit structure of another anti-surge power adapter of the present invention.

Detailed ways

The utility model will be further elaborated below according to the accompanying drawings and specific embodiments.

The anti-surge power adapter of the utility model can be various power adapters suitable for various electrical equipment. For example, it can simply only include the copper sheet 10 used to relieve the instantaneous surge, and the alternating current power input terminal (AC), transformer T, rectification filter circuit 1 and direct current output terminal (DC) connected in sequence (as shown in the figure 2), it may also include a copper sheet 10 and an alternating current power input terminal (AC), a first rectification filter circuit 2, a control circuit 3, a transformer T, a second rectification filter circuit 4 and a direct current output terminal ( DC) more complex power adapter (as shown in Figure 4).

As shown in Figure 2, in the preferred embodiment of the present utility model, comprise two pieces of copper sheet 10 that are used for releasing momentary surge, be attached to a PCB board, two pieces of copper sheet 10 are connected with two on PCB board respectively. The solder joints 11 are connected, and are connected to the live wire and neutral wire of the AC power supply through these two solder joints. Wherein, as shown in FIG. 3 , the relative positions of the two copper sheets 10 are in a symmetrical zigzag shape with a certain distance between them. The distance is determined by the connection position of the copper sheet 10 in the circuit and the specific parameters of the circuit. When it is necessary to withstand high voltage, the distance between the copper sheets will be reduced, but the minimum should not be less than 2.0mm; otherwise, the distance between the copper sheets will increase. In this way, when an instantaneous high voltage (such as encountering a lightning strike) arrives, the circuit can discharge through the two copper sheets 10 to protect the power supply and the electrical equipment connected to it from being damaged.

In another embodiment of the present utility model, a circuit structure of an anti-surge power adapter is shown in Figure 4, which includes an AC power input terminal (AC), a first rectifying and filtering circuit 2, a control circuit 3, and a transformer connected in sequence. T. The second rectifying and filtering circuit 4 and the direct current output terminal (DC), and a common mode inductor L is connected in series between the alternating current power input terminal (AC) and the first rectifying and filtering circuit 2 . In order to achieve anti-surge, two pairs of copper sheets 10 similar in structure and shape to the copper sheets 10 in Fig. 3 are provided, which are respectively connected between the two stages of the two windings of the common mode inductor L, that is, one pair of copper sheets 10 One of them is connected to one pin of a winding in the common mode inductor L, and the other is connected to the other pin of the winding, and one copper sheet 10 in the other pair of copper sheets 10 is connected to one of the other windings in the common mode inductor L pin and the other piece is connected to the other pin of this winding. It can improve the ability to resist instantaneous high voltage and antistatic ability. Wherein, the two pairs of copper sheets 10 can be attached to one PCB, or can be attached to two PCBs respectively, or can be directly connected between the two stages of the common mode inductor L.

In another embodiment of the present utility model, a circuit structure of an anti-surge power adapter is similar to the circuit shown in Figure 4, and also includes an alternating current power input terminal (AC), a first rectifying and filtering circuit 2, a control Circuit 3, transformer T, second rectification and filtering circuit 4 and direct current output terminal (DC). Among them, a pair of copper sheets 10 attached to the PCB are connected between the primary and secondary of the transformer T, that is, one of the copper sheets 10 is connected to the input end of the primary coil of the transformer T, and the other is connected to the secondary coil of the transformer T. connected to the output. It can improve the ability to resist instantaneous high voltage and antistatic ability.

In other embodiments of the present utility model, according to the actual circuit structure of the power adapter, it can be selected to connect between the live wire and the neutral wire of the power supply, between the two stages of the common mode inductor L, and between the primary and secondary of the transformer T. For the copper sheet 10 for releasing the instantaneous surge, the copper sheet 10 for releasing the instantaneous surge may also be provided at two of the above three positions at the same time.

In other embodiments of the present utility model, copper sheets 10 of other shapes and sizes can also be used, but the relative positions of two copper sheets 10 are preferably zigzag, so that the copper sheets 10 can realize rapid discharge. In other embodiments of the present utility model, the copper sheet 10 may not be attached to the PCB, but directly connected to the circuit. In other embodiments of the present invention, the copper sheet 10 can be attached to other insulating boards or insulating elements.

To sum up, the utility model provides an anti-surge power adapter that discharges instantaneous high voltage through copper sheets or copper sheets attached to PCB boards or other insulating boards. Although the embodiments of the present utility model have been specifically described here, it is obvious to those skilled in the art that various modifications and additions can be made without departing from the scope of the present utility model. , replacement and other changes. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention shall include all embodiments falling within the scope of the claims.

Claims (6)

1. An anti-surge power adapter, including a transformer, is characterized in that: it also includes a pair of copper sheets for discharging instantaneous surges, which are connected between the transformer and the input end of the power supply or on the transformer, and the two copper sheets There is a certain distance between them. 2. The anti-surge power adapter according to claim 1, wherein one of the pair of copper sheets is connected to the live wire of the power supply, and the other is connected to the neutral wire of the power supply. 3. The anti-surge power adapter according to claim 1, wherein one of the pair of copper sheets is connected to the primary of the transformer, and the other is connected to the secondary of the transformer. 4. The anti-surge power adapter according to claim 1, wherein a common-mode inductor is connected between the transformer and the input end of the power supply, and one of the pair of copper sheets is connected to the common-mode inductor. One pin of one winding is connected, and the other is connected to the other pin of the winding; a pair of copper sheets for discharging transient surges are also included, one of which is connected to the other winding of the common mode inductor One pin is connected and the other piece is connected to the other pin of this winding. 5. The anti-surge power adapter according to any one of claims 1 to 4, characterized in that: the relative positions of the paired copper sheets are in a symmetrical zigzag shape. 6. The anti-surge power adapter according to any one of claims 1 to 4, wherein the copper sheet is attached to a printed circuit board (PCB).

Images