CN214900656U

CN214900656U - Novel this ampere of display screen working power supply circuit

Info

Publication number: CN214900656U
Application number: CN202121017322.9U
Authority: CN
Inventors: 孙多辉; 许同乐; 陶新明; 彭玲; 王乐; 卢顺
Original assignee: Triumph Heavy Industry Co Ltd
Current assignee: Triumph Heavy Industry Co Ltd
Priority date: 2021-05-13
Filing date: 2021-05-13
Publication date: 2021-11-26
Anticipated expiration: 2031-05-13

Abstract

The utility model relates to the technical field of display screen power supply circuits, in particular to a novel intrinsic safety display screen working power supply circuit, which comprises a first stabilized voltage power supply module, a second stabilized voltage power supply module, a first power supply isolation module, a second power supply isolation module and a wiring terminal, wherein the first stabilized voltage power supply module is connected with the wiring terminal to provide intrinsic safety power supply, the first stabilized voltage power supply module and the second stabilized voltage power supply module are connected with each other, and the first power supply isolation module and the second power supply isolation module are both connected with the first stabilized voltage power supply module; the first voltage stabilizing power supply module, the second voltage stabilizing power supply module, the first power isolation module and the second power isolation module are all provided with GND ends, and the GND ends are grounded; the power circuit provided by the utility model can adopt small-capacity capacitors and inductors, and does not affect the normal work of the display screen; the circuit has high safety performance and stable operation.

Description

Novel this ampere of display screen working power supply circuit

Technical Field

The utility model relates to a display screen power supply circuit technical field specifically is a novel this ampere of display screen working power supply circuit.

Background

In recent years, the automation degree of coal mines in China is increasingly improved, the mine operation safety is particularly important, and most of electrical operation systems of mining tunneling machines are required to adopt intrinsic safety equipment.

The power supply of the intrinsic safety power supply needs to be matched with a working power supply circuit of a load, and the intrinsic safety test of no spark and low energy needs to be met and can be used after evidence obtaining; according to the standard of the intrinsic safety power supply for the coal mine, the capacitance value and the inductance value contained in a circuit of a load carried by the intrinsic safety power supply have certain requirements and are required to be smaller than the allowed value of the intrinsic safety power supply; based on this, the utility model provides a novel this ampere of display screen working power supply circuit to solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a novel this ampere of display screen working power supply circuit to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a novel working power supply circuit of an intrinsically safe display screen comprises a first voltage stabilizing power supply module, a second voltage stabilizing power supply module, a first power supply isolation module, a second power supply isolation module and a wiring terminal, wherein the first voltage stabilizing power supply module is connected with the wiring terminal to provide an intrinsically safe power supply; the first voltage stabilizing power supply module, the second voltage stabilizing power supply module, the first power isolation module and the second power isolation module are all provided with GND ends, and the GND ends are grounded.

Preferably, an end of a voltage input V1 of the first voltage-stabilized power supply module is sequentially connected in series with an inductor LDM1, a resistance wire FUSE1, a diode D2, and a diode D1, wherein the diode D1 is connected with a positive end of a connection terminal; the voltage input V1 end and the GND end of the first voltage-stabilizing power supply module are connected in parallel with a capacitor C3 and a capacitor C4, and the resistance wire type FUSE1 is connected with a safety capacitor CX1 and a voltage dependent resistor RV 1.

Preferably, one end of the capacitor C3 is connected with the inductor LDM1, and the other end is connected with the GND terminal; one end of the capacitor C4 is connected to the voltage input V1 end of the first voltage-stabilized power supply module, and the other end is connected to the GND end.

Preferably, the capacitor C3 is connected in parallel with a zener diode DW1 and a zener diode DW2, cathodes of the zener diode DW1 and the zener diode DW2 are connected to one end of the capacitor C3, and anodes thereof are connected to the common ground.

Preferably, the safety regulation capacitor CX1 is connected in parallel with the piezoresistor RV1, the two ends are connected with the FUSE1, and one end is grounded; one end of the piezoresistor RV1 is connected to the negative end of the diode D2, then connected to the negative end of the diode D1, and finally connected to the positive end of the connecting terminal.

Preferably, the output end V0 of the DC5V of the first regulated power supply module is connected with the 5V input end V1 of the second regulated power supply module, the 5V input end V1 of the second regulated power supply module is connected with a capacitor C7, and the other end of the capacitor C7 is grounded; the capacitor C7 is connected with a resistor R1 and an electrolytic capacitor CT1 in parallel, and the resistor R1 and the electrolytic capacitor CT1 are connected in series; a 3.3V voltage output end V0 of the second voltage-stabilized power supply module is connected with a capacitor C8, and the other end of the capacitor C8 is grounded; the capacitor C8 is connected in parallel with a resistor R2 and an electrolytic capacitor CT2, and the resistor R2 and the electrolytic capacitor CT2 are connected in series.

Preferably, the 5V power input terminals V1 of the first power isolation module and the second power isolation module are connected with the DC5V output terminal V0 of the first regulated power supply module; a 5V output end V0 of the first power isolation module is connected with a capacitor C5, and the other end of the capacitor C5 is connected with a 0V end of the first power isolation module and is grounded; and the 5V output end V0 of the second power isolation module is connected with a capacitor C6, and the other end of the capacitor C6 is connected with the 0V end of the second power isolation module and is grounded.

Compared with the prior art, the beneficial effects of the utility model are that: the power circuit provided by the utility model can adopt small-capacity capacitors and inductors, and does not affect the normal work of the display screen; the circuit has high safety performance and stable operation.

Drawings

Fig. 1 is a schematic structural view of the present invention;

reference numbers in the figures: 1. a first regulated power supply module; 2. a second regulated power supply module; 3. a first power isolation module; 4. a second power isolation module; 5. and a terminal.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a novel working power supply circuit of an intrinsically safe display screen comprises a first voltage-stabilized power supply module 1, a second voltage-stabilized power supply module 2, a first power isolation module 3, a second power isolation module 4 and a wiring terminal 5, wherein the first voltage-stabilized power supply module 1 is connected with the wiring terminal 5 to provide an intrinsically safe power supply, the first voltage-stabilized power supply module 1 and the second voltage-stabilized power supply module 2 are connected with each other, and the first power isolation module 3 and the second power isolation module 4 are both connected with the first voltage-stabilized power supply module 1; the first voltage-stabilizing power supply module 1, the second voltage-stabilizing power supply module 2, the first power isolation module 3 and the second power isolation module 4 are all provided with GND ends, and the GND ends are grounded.

Further, an end of a voltage input V1 of the first voltage-stabilized power supply module 1 is sequentially connected in series with an inductor LDM1, a resistance wire FUSE1, a diode D2, and a diode D1, wherein the diode D1 is connected with a positive end of the connection terminal 5; the voltage input V1 end and the GND end of the first voltage-stabilized power supply module 1 are connected in parallel with a capacitor C3 and a capacitor C4, and the resistance wire type FUSE1 is connected with a safety capacitor CX1 and a voltage dependent resistor RV 1.

Furthermore, one end of the capacitor C3 is connected with the inductor LDM1, and the other end of the capacitor C3 is connected with the GND end; one end of the capacitor C4 is connected to the voltage input V1 end of the first voltage-stabilized power module 1, and the other end is connected to the GND end.

Furthermore, a voltage stabilizing diode DW1 and a voltage stabilizing diode DW2 are connected in parallel with the capacitor C3, cathodes of the voltage stabilizing diode DW1 and the voltage stabilizing diode DW2 are connected with one end of the capacitor C3, and anodes of the voltage stabilizing diode DW1 and the voltage stabilizing diode DW2 are connected with the same ground.

Further, the safety regulation capacitor CX1 is connected in parallel with the piezoresistor RV1, the two ends are connected with the resistance wire type FUSE1, and one end is grounded; one end of the piezoresistor RV1 is connected to the negative terminal of the diode D2, then connected to the negative terminal of the diode D1, and finally connected to the positive terminal of the connecting terminal 5.

Further, an output end V0 of the DC5V of the first regulated power supply module 1 is connected to a 5V input end V1 of the second regulated power supply module 2, a 5V input end V1 of the second regulated power supply module 2 is connected to a capacitor C7, and the other end of the capacitor C7 is grounded; the capacitor C7 is connected with a resistor R1 and an electrolytic capacitor CT1 in parallel, and the resistor R1 and the electrolytic capacitor CT1 are connected in series; a 3.3V voltage output end V0 of the second voltage-stabilized power supply module 2 is connected with a capacitor C8, and the other end of the capacitor C8 is grounded; the capacitor C8 is connected in parallel with a resistor R2 and an electrolytic capacitor CT2, and the resistor R2 and the electrolytic capacitor CT2 are connected in series.

Furthermore, the 5V power input terminals V1 of the first power isolation module 3 and the second power isolation module 4 are connected to the DC5V output terminal V0 of the first regulated power supply module 1; a 5V output end V0 of the first power isolation module 3 is connected with a capacitor C5, and the other end of the capacitor C5 is connected with a 0V end of the first power isolation module 3 and is grounded; and a 5V output end V0 of the second power isolation module 4 is connected with a capacitor C6, and the other end of the capacitor C6 is connected with the 0V end of the second power isolation module 4 and is grounded.

The working principle is as follows: the first regulated power supply module 1 provides a DC12V input and a DC5V output, the second regulated power supply module 2 provides a DC5V input and a DC3.3V output, and the first power isolation module 3 and the second power isolation module 4 are both a DC5V input and a DC5V output to provide power for the following circuits.

The FUSE1, the diode D2 and the diode D1 form a reliable shunt safety component, and an interface device is arranged between the intrinsic safety circuit and the non-intrinsic safety circuit; diodes D1 and D2 are rated to carry current in a short circuit condition, and FUSE1 is a resistance wire FUSE that limits current to the intrinsically safe circuit and requires encapsulation. The voltage dependent resistor RV1 is used for limiting surge voltage of the intrinsic safety circuit, the safety capacitor CX1 mainly plays a filtering role, the voltage stabilizing diode DW1 and the voltage stabilizing diode DW2 which are connected in parallel are used for limiting voltage, and the capacitor C3, the capacitor C4 and the inductor LDM1 form an n-shaped filter circuit.

The electrolytic capacitor CT1 is electrically connected in series with the resistor R1 and then connected in parallel with the capacitor C7 to provide a stable 5V power input for the second regulated power supply module 2. Meanwhile, the capacitance value is reduced by half, the capacitance value of the electrolytic capacitor CT1 is converted from 22 muF to 11 muF, the energy of the energy storage element of the circuit which can ignite sparks is reduced, and the safety of the intrinsic safety circuit is ensured.

The electrolytic capacitor CT2 is connected in series with the resistor R2 and then connected in parallel with the capacitor C8, and a stable 3.3V power supply is provided for a circuit behind the electrolytic capacitor CT. Meanwhile, the capacitance value is reduced by half, the capacitance value of the electrolytic capacitor CT2 is converted from 22 muF to 11 muF, the energy of the energy storage element of the circuit which can ignite sparks is reduced, and the safety of the intrinsic safety circuit is ensured. Because the capacitor value of the part is not counted in the calculation of the capacitance value of the energy storage element of the intrinsic safety circuit after the integrated voltage-stabilizing power supply chip U2.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel this ampere of display screen power supply circuit that works which characterized in that: the power supply comprises a first voltage-stabilizing power supply module (1), a second voltage-stabilizing power supply module (2), a first power isolation module (3), a second power isolation module (4) and a wiring terminal (5), wherein the first voltage-stabilizing power supply module (1) is connected with the wiring terminal (5) to provide an intrinsic safety power supply, the first voltage-stabilizing power supply module (1) and the second voltage-stabilizing power supply module (2) are connected with each other, and the first power isolation module (3) and the second power isolation module (4) are both connected with the first voltage-stabilizing power supply module (1); the first voltage-stabilizing power supply module (1), the second voltage-stabilizing power supply module (2), the first power supply isolation module (3) and the second power supply isolation module (4) are all provided with GND ends, and the GND ends are grounded.

2. The novel intrinsically safe display screen working power supply circuit as claimed in claim 1, wherein: the voltage input V1 end of the first voltage-stabilized power supply module (1) is sequentially connected in series with an inductor LDM1, a resistance wire type FUSE1, a diode D2 and a diode D1, and the diode D1 is connected with the positive end of a connecting terminal (5); the voltage input V1 end and the GND end of the first voltage-stabilized power supply module (1) are connected in parallel with a capacitor C3 and a capacitor C4, and the resistance wire type FUSE1 is connected with a safety capacitor CX1 and a voltage dependent resistor RV 1.

3. The novel intrinsically safe display screen working power supply circuit as claimed in claim 2, wherein: one end of the capacitor C3 is connected with the inductor LDM1, and the other end of the capacitor C3 is connected with the GND end; one end of the capacitor C4 is connected to the voltage input V1 end of the first voltage-stabilized power supply module (1), and the other end is connected to the GND end.

4. The novel intrinsically safe display screen working power supply circuit as claimed in claim 2, wherein: the capacitor C3 is connected in parallel with a voltage stabilizing diode DW1 and a voltage stabilizing diode DW2, the cathodes of the voltage stabilizing diode DW1 and the voltage stabilizing diode DW2 are connected with one end of the capacitor C3, and the anodes are connected with the same ground.

5. The novel intrinsically safe display screen working power supply circuit as claimed in claim 2, wherein: the safety capacitor CX1 is connected with the piezoresistor RV1 in parallel, the two ends of the safety capacitor CX1 are connected with the resistance wire type FUSE1, and one end of the safety capacitor CX1 is grounded; one end of the piezoresistor RV1 is connected to the negative end of the diode D2, then connected to the negative end of the diode D1, and finally connected to the positive end of the connecting terminal (5).

6. The novel intrinsically safe display screen working power supply circuit as claimed in claim 1, wherein: the output end V0 of the DC5V of the first stabilized power supply module (1) is connected with the input end V1 of the 5V of the second stabilized power supply module (2), the input end V1 of the 5V of the second stabilized power supply module (2) is connected with a capacitor C7, and the other end of the capacitor C7 is grounded; the capacitor C7 is connected with a resistor R1 and an electrolytic capacitor CT1 in parallel, and the resistor R1 and the electrolytic capacitor CT1 are connected in series; a 3.3V voltage output end V0 of the second voltage-stabilized power supply module (2) is connected with a capacitor C8, and the other end of the capacitor C8 is grounded; the capacitor C8 is connected in parallel with a resistor R2 and an electrolytic capacitor CT2, and the resistor R2 and the electrolytic capacitor CT2 are connected in series.

7. The novel intrinsically safe display screen working power supply circuit as claimed in claim 1, wherein: the 5V power input ends V1 of the first power isolation module (3) and the second power isolation module (4) are connected with the DC5V output end V0 of the first stabilized power supply module (1); a 5V output end V0 of the first power isolation module (3) is connected with a capacitor C5, and the other end of the capacitor C5 is connected with a 0V end of the first power isolation module (3) and is grounded; and a 5V output end V0 of the second power isolation module (4) is connected with a capacitor C6, and the other end of the capacitor C6 is connected with the 0V end of the second power isolation module (4) and is grounded.