CN210167965U

CN210167965U - Power supply filter

Info

Publication number: CN210167965U
Application number: CN201921335763.6U
Authority: CN
Inventors: 郭其达
Original assignee: Deng Da (shenzhen) Electrical Appliance Co Ltd
Current assignee: Deng Da (shenzhen) Electrical Appliance Co Ltd
Priority date: 2019-08-17
Filing date: 2019-08-17
Publication date: 2020-03-20
Anticipated expiration: 2029-08-17

Abstract

The utility model provides a power filter, which comprises a filter circuit arranged on a PCB board; the PCB filter circuit also comprises a cavity for accommodating the PCB, wires for input and output in the filter circuit on the PCB are led out of the cavity, and fillers are filled and sealed around the PCB in the cavity. The utility model discloses a product stability is very strong, has accomplished thinnest embedment structure in height, and the product inner structure is the most reliable PCB plug-in components welded connection, and components and parts stability is very strong.

Description

Power supply filter

Technical Field

The utility model relates to a wave filter field, in particular to be applied to wave filter among power supply circuit.

Background

In the power supply, a filter is arranged behind a rectifier and filters direct current after rectification to generate a stable direct current power supply, which is an important device in a power supply circuit.

Disclosure of Invention

The utility model discloses to the not enough that the filter is bulky in the present power can not satisfy the user's needs, provide a power filter of integration.

The utility model discloses a realize that the technical scheme that its technical purpose adopted is: a power filter includes a filter circuit disposed on a PCB board; the PCB filter circuit also comprises a cavity for accommodating the PCB, wires for input and output in the filter circuit on the PCB are led out of the cavity, and fillers are filled and sealed around the PCB in the cavity.

The utility model discloses a product stability is very strong, has accomplished thinnest embedment structure in height, and the product inner structure is the most reliable PCB plug-in components welded connection, and components and parts stability is very strong.

Further, in the power filter described above: the cavity is a cuboid with the length of 50-200 mm, the width of 15-50 mm and the height of less than 25 mm.

Further, in the power filter described above: the cavity be the cuboid of length 124mm, width 33mm, height 20 mm.

Further, in the power filter described above: the filter circuit comprises a common-mode inductor L1, a common-mode inductor L2, an electrolytic capacitor C1 and an electrolytic capacitor C2; the positive lead and the negative lead of the input lead are respectively connected with the No. 1 pin and the No. 3 pin of the common-mode inductor L1; the No. 2 pin of the common-mode inductor L1 is connected with the No. 1 pin of the common-mode inductor L2, and the No. 4 pin of the common-mode inductor L1 is connected with the No. 3 pin of the common-mode inductor L2; a No. 3.4 pin of the common-mode inductor L2 is connected with a positive electrode lead and a negative electrode lead in the output lead respectively; the electrolytic capacitor C1 and the electrolytic capacitor C2 are respectively arranged between

pins

1, 3 and

pins

2 and 4 of the common-mode inductor L2.

Further, in the power filter described above: a diode is also arranged between the positive lead of the input lead and the No. 1 pin of the common-mode inductor L1.

Further, in the power filter described above: the common mode inductor L1 and the common mode inductor L2 are both 100mH/2A amorphous magnetic rings, and the specification models of the electrolytic capacitor C1 and the electrolytic capacitor C2 are 2200 UF/35V.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is an outline view of a power filter according to embodiment 1 of the present invention.

Fig. 2 is the utility model discloses embodiment 1 power filter PCB board structure chart.

Fig. 3 is a schematic circuit diagram of the power filter according to embodiment 1 of the present invention.

Detailed Description

Embodiment 1, this embodiment is an integrated power filter, as shown in fig. 1, the power filter is a cuboid as a whole, a PCB board 5 welded with a filter circuit is disposed in a cavity 1 of the cuboid, an input lead and an output lead 2 of the filter circuit extend from two ends of the cavity 1 respectively, when in use, one end of the input lead is connected to an output end of a rectifier circuit of a power supply, the output lead directly outputs a stable power supply, and a terminal 3 is further disposed at the end of the lead 2.

The structure of the PCB 5 is as shown in fig. 2, a first amorphous magnetic ring 10, a first capacitor 9, a second amorphous magnetic ring 8, and a second capacitor 7 are welded in sequence under the PCB 5, the solder joint 4 is at the lower side of the PCB 5, and a diode 6 is further disposed at the access wire 2.

In practice, the volume of the cavity 1 can be designed according to the size of the accommodated PCB 5, and is generally 50-200 mm long, 15-50 mm wide and less than 25mm high, in this embodiment, 124mm, 33mm and 20mm long and wide respectively.

The circuit schematic diagram of the present embodiment is shown in fig. 3: the filter circuit comprises four components of a common-mode inductor L1, a common-mode inductor L2, an electrolytic capacitor C1 and an electrolytic capacitor C2, wherein: the common mode inductor L1 and the common mode inductor L2 are 100mH/2A amorphous magnetic rings, and the specification models of the electrolytic capacitor C1 and the electrolytic capacitor C2 are 2200 UF/35V; the connection mode is as follows: the positive electrode lead and the negative electrode lead of the input lead 1 are respectively connected with the No. 1 pin and the No. 3 pin of the common-mode inductor L1; the No. 2 pin of the common-mode inductor L1 is connected with the No. 1 pin of the common-mode inductor L2, and the No. 4 pin of the common-mode inductor L1 is connected with the No. 3 pin of the common-mode inductor L2; a No. 3.4 pin of the common-mode inductor L2 is connected with a positive electrode lead and a negative electrode lead in the output lead respectively; the electrolytic capacitor C1 and the electrolytic capacitor C2 are respectively arranged between

pins

1, 3 and

pins

2 and 4 of the common-mode inductor L2. In addition, a diode is further provided between the positive electrode lead of the input lead and the No. 1 pin of the common mode inductor L1. IN practice two diodes of type IN4007 may be used IN parallel. In practice, the values of the capacitance and inductance may vary according to variations in the power and voltage of the power supply.

The product of this embodiment is a custom power filter, very low in height, as described below:

firstly, the method comprises the following steps: the product cavity can be formed by combining a plurality of parts and can also be of an integrally formed structure.

Secondly, the method comprises the following steps: the internal device of the product is a PCB welding structure, and the stability of the product is effectively improved.

Thirdly, the method comprises the following steps: the input and output of the product are in an electronic wire connection mode.

Fourthly: the product is currently the thinnest structural model in the market.

The power filter of this embodiment, theory of operation is mains voltage input, through amorphous magnetic ring and electric capacity, exports again, has effectually purified mains voltage for voltage is more reliable and more stable.

Claims

1. A power filter includes a filter circuit disposed on a PCB board; the method is characterized in that: the PCB filter circuit also comprises a cavity for accommodating the PCB, wires for input and output in the filter circuit on the PCB are led out of the cavity, and fillers are filled and sealed around the PCB in the cavity.

2. The power filter of claim 1, wherein: the cavity is a cuboid with the length of 50-200 mm, the width of 15-50 mm and the height of less than 25 mm.

3. The power filter of claim 2, wherein: the cavity be the cuboid of length 124mm, width 33mm, height 20 mm.

4. A power filter as claimed in claim 1, 2 or 3, wherein: the filter circuit comprises a common-mode inductor L1, a common-mode inductor L2, an electrolytic capacitor C1 and an electrolytic capacitor C2; the positive lead and the negative lead of the input lead are respectively connected with the No. 1 pin and the No. 3 pin of the common-mode inductor L1; the No. 2 pin of the common-mode inductor L1 is connected with the No. 1 pin of the common-mode inductor L2, and the No. 4 pin of the common-mode inductor L1 is connected with the No. 3 pin of the common-mode inductor L2; a No. 3.4 pin of the common-mode inductor L2 is connected with a positive electrode lead and a negative electrode lead in the output lead respectively; the electrolytic capacitor C1 and the electrolytic capacitor C2 are respectively arranged between pins 1, 3 and pins 2 and 4 of the common-mode inductor L2.

5. The power filter of claim 4, wherein: a diode is also arranged between the positive lead of the input lead and the No. 1 pin of the common-mode inductor L1.

6. The power filter of claim 4, wherein: the common mode inductor L1 and the common mode inductor L2 are both 100mH/2A amorphous magnetic rings, and the specification models of the electrolytic capacitor C1 and the electrolytic capacitor C2 are 2200 UF/35V.