CN216771828U

CN216771828U - Charged display circuit

Info

Publication number: CN216771828U
Application number: CN202123409811.1U
Authority: CN
Inventors: 梁忠伟
Original assignee: Xiamen Leelen High Voltage Electric Co ltd
Current assignee: Xiamen Leelen High Voltage Electric Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-06-17
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the field of charged display, in particular to a charged display circuit, which comprises a protection module, a switching power supply voltage-stabilizing output module, an anti-interference charged display module, a rectification energy storage module, an anti-interference isolation transmission module and a locking control loop module, wherein the input end of the protection module is connected with mains supply, the output end of the protection module is electrically connected with the input end of the switching power supply voltage-stabilizing module, a charged signal is rectified and stored by the rectification energy storage module and then is input to the anti-interference charged display module, the output end of the anti-interference charged display module is electrically connected with the input end of the anti-interference isolation transmission module, the output ends of the switching power supply voltage-stabilizing output module and the anti-interference isolation transmission module are electrically connected with the input end of the locking control loop module, and the switching power supply voltage-stabilizing output module uses a piezoresistor 1 and a resistor R34 as a protection device, the use of a large number of components is reduced, and the use cost is effectively reduced.

Description

Charged display circuit

Technical Field

The utility model relates to the field of charged display, in particular to a charged display circuit.

Background

At present, an electrified display is necessary equipment of a high-voltage switch cabinet, and the electrified display has high-voltage indicating and locking output functions and plays an important role in five prevention of the switch cabinet. In order to improve the EMC performance of the power supply, a plurality of protective devices are added at the power input end of the conventional power supply. An X2 capacitor is connected in parallel between the live wire (L) and the zero wire (N) to inhibit differential mode interference; the piezoresistor is connected in parallel and the thermistor is connected in series to absorb lightning surge current; and Y capacitors are connected in parallel between L and the ground, and between N and the ground, and are connected in series with a common-mode inductor for inhibiting common-mode interference. The conventional circuit has more components and higher use cost

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a charged display circuit which can solve the technical problems of more components, higher use cost and the like.

In order to solve the technical problems, the utility model provides the following technical scheme:

a charged display circuit is characterized by comprising a protective module, a switching power supply voltage-stabilizing output module, an anti-interference charged display module, a rectification energy-storing module, an anti-interference isolation transmission module and a locking control loop module, wherein the input end of the protective module is connected with mains supply, the output end of the protective module is electrically connected with the input end of the switching power supply voltage-stabilizing module, a charged signal is rectified and stored by the rectification energy-storing module and then is input into the anti-interference charged display module, the output end of the anti-interference charged display module is electrically connected with the input end of the anti-interference isolation transmission module, the output ends of the switching power supply voltage-stabilizing output module and the anti-interference isolation transmission module are electrically connected with the input end of the locking control loop module, the anti-interference charged display module filters an interference signal to ensure normal display of the anti-interference isolation transmission module, and the anti-interference isolation transmission module filters input interference, ensuring the input signal to be normal.

Further, the protection module comprises a piezoresistor RV1, a resistor R34, a polar capacitor C8 and a diode D11; the voltage dependent resistor RV1 is connected between live wire and zero line, resistance R34 and diode D11 establish ties in proper order between live wire and switching power supply voltage regulation output module's input, switching power supply voltage regulation output module's input still with have utmost point electric connection of electric capacity C8, there is utmost point electric capacity C8's negative pole ground connection.

Further, anti-interference electrified display module includes first display circuit, first display circuit includes emitting diode LED1, electric capacity C25, emitting diode LED 1's positive pole and rectification energy storage module's output electric connection, emitting diode LED 1's negative pole and anti-interference input electric connection who keeps apart transmission module, electric capacity C25's both ends respectively with emitting diode LED 1's positive pole and negative pole electric connection.

Further, the anti-interference isolation transmission module comprises a resistor R19, a capacitor C28 and a photoelectric coupler U3; the anti-interference electrified display module's output and the one end of resistance R19, photoelectric coupler U3's emitting diode's input electric connection, electric capacity C28 connects and ground connection between photoelectric coupler U3's emitting diode's input and output, photoelectric coupler U3's phototriode's input and shutting control circuit electric connection, resistance R19 and photoelectric coupler U3's phototriode's output all ground connection.

The utility model has the beneficial effects that:

1. in this scheme, switching power supply steady voltage output module uses piezo-resistor RV1 and resistance R34 as protector, uses single diode to rectify, has filtered common mode and differential mode interference through electric capacity simultaneously, on the basis of guaranteeing that product EMC dependable performance, reduces to use the effectual use cost that has reduced of a large amount of components and parts.

2. In the scheme, in the anti-interference charged display module, a capacitor filtering interference signal is connected in parallel between the input end of the photoelectric coupler U3 and the light-emitting diode, so that the normal work of the light-emitting diode is effectively ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a general flow diagram of a powered display circuit according to the present invention;

FIG. 2 is a block diagram of a multi-display circuit of the charged display circuit according to the present invention;

FIG. 3 is a circuit diagram of a live display protection module according to the present invention;

fig. 4 is a circuit diagram of an anti-interference live display module of the live display circuit according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Referring to fig. 1-4, the present invention provides a live display circuit, which comprises a protection module, a switching power supply voltage stabilization output module, an anti-interference live display module, a rectification energy storage module, an anti-interference isolation transmission module and a locking control loop module, wherein the input end of the protection module is connected with mains supply, the output end of the protection module is electrically connected with the input end of the switching power supply voltage stabilization module, a live signal is rectified and stored by the rectification energy storage module and then input to the anti-interference live display module, the output end of the anti-interference live display module is electrically connected with the input end of the anti-interference isolation transmission module, the output ends of the switching power supply voltage stabilization output module and the anti-interference isolation transmission module are electrically connected with the input end of the locking control loop module, the anti-interference live display module filters an interference signal to ensure normal display of the circuit, and the anti-interference isolation transmission module filters input interference, ensuring the input signal to be normal.

Referring to fig. 3, the protection module includes a voltage dependent resistor RV1, a resistor R34, a polar capacitor C8, and a diode D11; the voltage dependent resistor RV1 is connected between the live wire and the zero wire, the resistor R34 and the diode D11 are sequentially connected in series between the live wire and the input end of the switching power supply voltage-stabilizing output module, the input end of the switching power supply voltage-stabilizing output module is also electrically connected with the anode of the active capacitor C8, and the cathode of the active capacitor C8 is grounded.

The switching power supply voltage-stabilizing output module comprises a resistor R18, a resistor R31, a resistor R32, a capacitor C16, an electrode capacitor C14, an electrode capacitor C24, a diode D15, a diode D16, an inductor L2 and a driving chip U1; pin 1 of the driving chip U1 is an input terminal of the switching power supply voltage stabilization output module, a resistor R34 and a diode D11 are sequentially connected in series between a live wire and pin 1 of the driving chip U1, pin 1 of the driving chip U1 is also electrically connected with an anode of a polar capacitor C8, pin 2 of the driving chip U1 is electrically connected with one end of the resistor R31 and one end of the resistor R18, the other end of the resistor R31 is electrically connected with an anode of the polar capacitor C24 and a cathode of the diode D15, pin 3 of the driving chip U1 is electrically connected with one end of the capacitor C16, the other end of the capacitor C16 is electrically connected with pin 4-pin 7 of the driving chip U1, the other end of the resistor R18, a cathode of the polar capacitor C24, a cathode of the diode D16 and one end of an inductor L2, the other end of the inductor L2 is electrically connected with an anode of the diode D15, an anode of the polar capacitor C14, one end of the resistor R32 and an input terminal of the latching control loop, the anode of the diode D16, the cathode of the electrode capacitor C14, and the other end of the resistor R32 are all grounded. In this embodiment, the driver chip U1 is model LYT 0005D.

Referring to fig. 4, the anti-interference charged display module includes a first display circuit, the first display circuit includes a light emitting diode LED1 and a capacitor C25, an anode of the light emitting diode LED1 is electrically connected to an output terminal of the rectification energy storage module, a cathode of the light emitting diode LED1 is electrically connected to an input terminal of the anti-interference isolation transmission module, and two ends of the capacitor C25 are electrically connected to an anode and a cathode of the light emitting diode LED1, respectively.

In this embodiment, the anti-interference charged display module further includes a second display circuit and a third display circuit, the second display circuit includes a light emitting diode LED2 and a capacitor C26, an anode of the light emitting diode LED2 is electrically connected to an output end of the rectification energy storage module, a cathode of the light emitting diode LED2 is electrically connected to an input end of the anti-interference isolation transmission module, and two ends of the capacitor C26 are electrically connected to an anode and a cathode of the light emitting diode LED2, respectively.

The third display circuit comprises a light emitting diode LED3 and a capacitor C27, wherein the anode of the light emitting diode LED3 is electrically connected with the output end of the rectification energy storage module, the cathode of the light emitting diode LED3 is electrically connected with the input end of the anti-interference isolation transmission module, and two ends of the capacitor C27 are respectively electrically connected with the anode and the cathode of the light emitting diode LED 3.

Referring to fig. 4, the anti-interference isolation transmission module includes a resistor R19, a capacitor C28, and a photocoupler U3; the light-emitting diode LED1, the light-emitting diode LED2, the negative pole of light-emitting diode LED3 and the one end of resistance R19, photoelectric coupler U3's emitting diode's input electric connection, electric capacity C28 connects and ground connection between photoelectric coupler U3's emitting diode's input and output, photoelectric coupler U3's phototriode's input and shutting control circuit electric connection, resistance R19 and photoelectric coupler U3's phototriode's output all ground connection.

When the circuit is used, the time is rectified by a diode D11, and then the time is output to a locking control loop module after common mode interference and differential mode interference are filtered by a driving and capacitor C16 of a driving chip U1, an active electrode capacitor C8, an active electrode capacitor C14 and an active electrode capacitor C24; the multi-path high-voltage signal is rectified and stored by the rectifying and energy storing module, displayed by the light emitting diode and transmitted to the photoelectric coupler U3, and transmitted to the locking control loop through the photoelectric coupler U3.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, which fall within the scope of the claimed invention. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A charged display circuit is characterized by comprising a protective module, a switching power supply voltage-stabilizing output module, an anti-interference charged display module, a rectification energy storage module, an anti-interference isolation transmission module and a locking control loop module, wherein the input end of the protective module is connected with mains supply, the output end of the protective module is electrically connected with the input end of the switching power supply voltage-stabilizing module, a charged signal is input to the anti-interference charged display module after being rectified and stored by the rectification energy storage module, the output end of the anti-interference charged display module is electrically connected with the input end of the anti-interference isolation transmission module, the output ends of the switching power supply voltage-stabilizing output module and the anti-interference isolation transmission module are electrically connected with the input end of the locking control loop module, the anti-interference charged display module filters an interference signal to ensure normal self display, and the anti-interference isolation transmission module filters input interference, ensuring the input signal to be normal.

2. The live display circuit according to claim 1, wherein: the protection module comprises a piezoresistor RV1, a resistor R34, an active capacitor C8 and a diode D11; the voltage dependent resistor RV1 is connected between live wire and zero line, resistance R34 and diode D11 establish ties in proper order between live wire and switching power supply voltage regulation output module's input, switching power supply voltage regulation output module's input still with have utmost point electric connection of electric capacity C8, there is utmost point electric capacity C8's negative pole ground connection.

3. The live display circuit according to claim 1, wherein: the anti-interference electrified display module includes first display circuit, first display circuit includes emitting diode LED1, electric capacity C25, emitting diode LED 1's anodal and rectification energy storage module's output electric connection, emitting diode LED 1's negative pole and anti-interference input electric connection who keeps apart transmission module, electric capacity C25's both ends respectively with emitting diode LED 1's anodal and negative pole electric connection.

4. The live display circuit according to claim 3, wherein: the anti-interference isolation transmission module comprises a resistor R19, a capacitor C28 and a photoelectric coupler U3; the anti-interference electrified display module's output and the one end of resistance R19, photoelectric coupler U3's emitting diode's input electric connection, electric capacity C28 connects and ground connection between photoelectric coupler U3's emitting diode's input and output, photoelectric coupler U3's phototriode's input and shutting control circuit electric connection, resistance R19 and photoelectric coupler U3's phototriode's output all ground connection.