CN203326871U

CN203326871U - Direct-current power supply

Info

Publication number: CN203326871U
Application number: CN201320401287XU
Authority: CN
Inventors: 刘景超; 张彦修; 乔春雨
Original assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Current assignee: AVIC Shenyang Xinghua Aero Electrical Appliance Co Ltd
Priority date: 2013-07-08
Filing date: 2013-07-08
Publication date: 2013-12-04
Anticipated expiration: 2023-07-08

Abstract

The utility model discloses a direct current power supply. The direct current power supply includes a shell; the shell is provided with two input interfaces and two output interfaces; a circuit board is arranged inside the shell; the circuit board is composed of an input protection circuit, a control circuit and an output circuit; the input end of the input protection circuit is connected with the input interfaces; the output end of the input protection circuit is connected with the input end of the control circuit; the output end of the control circuit is connected with the input end of the output circuit; and the output end of the output circuit is connected with the output interfaces. The direct current power supply of the utility model can supply power for a subway electrical system. The input voltage of the direct current power supply is in a range from 66V to 160V, the output voltage of the direct current power supply is 24V, and the rated output power of the direct current power supply is 200W. The direct current power supply of the utility model is advantageous in removal of differential-mode and common-mode interference, overvoltage protection, strong electromagnetic interference prevention ability, volume miniaturization, power stabilization and strong anti-interference ability. The direct current power supply can output 24V direct current voltage under situations where input voltage is instable and environmental interference is strong.

Description

A kind of DC power supply

Technical field

The utility model relates to a kind of DC power supply, provides especially a kind of for the DC power supply to the power supply of subway electrical system.

Background technology

The existing power supply product is the not measure of anti-electromagnetic interference in service on subway, and the utility model improves aspect circuit protection, and output performance is stable, can uninterruptedly use for a long time.

The utility model content

The purpose of this utility model is to provide a kind of DC power supply, can effectively address the above problem.

The technical solution of the utility model is: a kind of DC power supply; comprise: housing; be provided with two input interfaces and two output interfaces on housing; enclosure interior is provided with circuit board; circuit board is comprised of input protection circuit, control circuit and output circuit, and the input of input protection circuit connects input interface, and the output of input protection circuit connects the input of control circuit; the output of control circuit connects the input of output circuit, and the output of output circuit connects output interface.

Preferably; described input protection circuit comprises the first filtration module, the first counnter attack module and prevented die block; the first counnter attack module respectively with the first filtration module with prevented that die block was connected; the first filtration module is connected with the input of input protection circuit, prevents that die block was connected with the output of protective circuit.

Preferably, described control circuit comprises power module, the second filtration module, the second counnter attack module and output voltage fine setting module, the input of power module is connected with the second counnter attack module, the second filtration module is connected with the second counnter attack module with the input of control circuit respectively, and the voltage trim module is connected with the output of power module and the output of control circuit respectively.

Preferably, described output circuit comprises the 3rd filtration module and the 3rd counnter attack module, and the 3rd filtration module is connected with the 3rd counnter attack module, and the 3rd filtration module is connected with the input of output circuit, and the 3rd counnter attack module is connected with the output of output circuit.

Preferably, described the first filtration module, the second filtration module and the 3rd filtration module comprise respectively electric capacity and inductance.

Preferably, described the first counnter attack module, the second counnter attack module and the 3rd counnter attack module comprise respectively the TVS diode.

Preferably, describedly prevented that die block comprised piezo-resistance.

Preferably, the volume of described DC power supply is 65 * 160 * 160mm ³.

The utility model is the power supply of subway headstock air-conditioning system; input voltage is from 66V to the 160V scope, and output voltage is 24V, specified output 200W power; remove the differential mode common mode disturbances, overvoltage protection, overcurrent proof magnetic disturbance are set, volume miniaturization, power stability, antijamming capability are strong.In the situation that input voltage is unstable, environmental interference is strong, stable output 24V direct voltage.

The accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the structural representation of the utility model input protection circuit.

Fig. 3 is the structural representation of the utility model control circuit.

Fig. 4 is the structural representation of the utility model output circuit.

Fig. 5 is the circuit diagram of the utility model input protection circuit.

Fig. 6 is the circuit diagram of the utility model control circuit.

Fig. 7 is the circuit diagram of the utility model output circuit.

Embodiment

By reference to the accompanying drawings the utility model is described in further detail now.

As shown in Fig. 1-7; a kind of DC power supply; comprise: housing; be provided with two input interfaces 1 and two output interfaces 2 on housing, enclosure interior is provided with circuit board, and circuit board is comprised of input protection circuit 3, control circuit 4 and output circuit 5; the input 6 of input protection circuit connects input interface 1; the output 10 of input protection circuit connects the input 11 of control circuit, and the output 16 of control circuit connects the input 17 of output circuit, and the output 20 of output circuit connects output interface 2.

Input protection circuit 3 comprises the first filtration module 7, the first counnter attack module 8 and prevented die block 9; the first counnter attack module 8 respectively with the first filtration module 7 with prevented that die block 9 was connected; the first filtration module 7 is connected with the input 6 of input protection circuit, prevents that die block 9 was connected with the output 10 of protective circuit.

Control circuit 4 comprises power module 14, the second filtration module 12, the second counnter attack module 13 and output voltage fine setting module 15, the input of power module 14 is connected with the second counnter attack module 13, the second filtration module 12 is connected with the second counnter attack module 13 with the input 11 of control circuit respectively, and voltage trim module 15 is connected with the output of control circuit 16 with the output of power module 14 respectively.

Output circuit 5 comprises the 3rd filtration module 18 and the 3rd counnter attack module 19, the 3rd filtration module 18 is connected with the 3rd counnter attack module 19, and the 3rd filtration module 18 is connected with the input 17 of output circuit, the 3rd counnter attack module 19 is connected with the output 20 of output circuit.

The first filtration module 7, the second filtration module 12 and the 3rd filtration module 18 comprise respectively electric capacity and inductance.

The first counnter attack module 8, the second counnter attack module 13 and the 3rd counnter attack module 19 comprise respectively the TVS diode.

Describedly prevented that die block 9 comprised piezo-resistance.

The volume of DC power supply is 65 * 160 * 160mm ³.

Above-described embodiment is only explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection range of the present utility model.

Claims

1. a DC power supply, it is characterized in that, comprise: housing, be provided with two input interfaces (1) and two output interfaces (2) on housing, enclosure interior is provided with circuit board, circuit board is by input protection circuit (3), control circuit (4) and output circuit (5) form, the input of input protection circuit (6) connects input interface (1), the output of input protection circuit (10) connects the input (11) of control circuit, the output of control circuit (16) connects the input (17) of output circuit, the output of output circuit (20) connects output interface (2).

2. according to a kind of DC power supply claimed in claim 1; it is characterized in that; described input protection circuit (3) comprises the first filtration module (7), the first counnter attack module (8) and prevented die block (9); the first counnter attack module (8) respectively with the first filtration module (7) with prevented that die block (9) was connected; the first filtration module (7) is connected with the input (6) of input protection circuit, prevents that die block (9) was connected with the output (10) of protective circuit.

3. according to a kind of DC power supply claimed in claim 2, it is characterized in that, described control circuit (4) comprises power module (14), the second filtration module (12), the second counnter attack module (13) and output voltage fine setting module (15), the input of power module (14) is connected with the second counnter attack module (13), the second filtration module (12) is connected with the second counnter attack module (13) with the input (11) of control circuit respectively, and voltage trim module (15) is connected with the output of power module (14) and the output (16) of control circuit respectively.

4. according to a kind of DC power supply claimed in claim 3, it is characterized in that, described output circuit (5) comprises the 3rd filtration module (18) and the 3rd counnter attack module (19), the 3rd filtration module (18) is connected with the 3rd counnter attack module (19), and the 3rd filtration module (18) is connected with the input (17) of output circuit, the 3rd counnter attack module (19) is connected with the output (20) of output circuit.

5. according to a kind of DC power supply claimed in claim 4, it is characterized in that, described the first filtration module (7), the second filtration module (12) and the 3rd filtration module (18) comprise respectively electric capacity and inductance.

6. according to a kind of DC power supply claimed in claim 5, it is characterized in that, described the first counnter attack module (8), the second counnter attack module (13) and the 3rd counnter attack module (19) comprise respectively the TVS diode.

7. according to a kind of DC power supply claimed in claim 6, it is characterized in that, describedly prevented that die block (9) comprised piezo-resistance.

8. according to a kind of DC power supply claimed in claim 7, it is characterized in that, the volume of described DC power supply is 65 * 160 * 160mm ³.