CN212677074U - EMC power module for sensor - Google Patents

Abstract

The utility model discloses an EMC power module for a sensor, which comprises an upper slow starting circuit, a voltage conversion circuit, a voltage and current detection circuit and an EMC energy storage capacitor set; the power-on slow starting circuit is suitable for being connected with an external input power supply and supplying power to the voltage conversion circuit and the voltage and current detection circuit; the voltage conversion circuit is suitable for converting an external input power supply into a voltage required by the sensor; the voltage and current detection circuit is suitable for detecting the working voltage and current parameters of the power supply module; the EMC energy storage capacitor bank is suitable for releasing electric energy when lightning surge causes equipment to be powered off instantly. The utility model provides a EMC power module for sensor, it increases the EMC function, goes up the slow start function of electricity, voltage current detection function to have the overvoltage protection function, satisfy mining ann's demand.

Description

EMC power module for sensor

Technical Field

The utility model relates to an EMC power module for sensor belongs to colliery control technical field.

Background

At present, the development of the national coal industry is rapid, and the safe production of coal mines is important. The underground large and small-sized equipment of the coal mine is numerous, the electromagnetic environment is complicated, and the working stability and reliability of the monitoring equipment are seriously influenced. When the conventional power module for the sensor is just powered on, a very large impact current is generated at the input end, and the circuit is burnt. And conventional power module for the sensor only possesses the function of supplying power on the spot, and power module's voltage current information can't in time transmit to the coal mine safety monitoring system in, is unfavorable for the staff to carry out all-round analysis to the safety monitoring data.

Disclosure of Invention

The utility model aims at overcoming prior art's defect, provide a EMC power module for sensor, it increases the EMC function, goes up electric slow start function, voltage current detection function to have the overvoltage protection function, satisfy mining ann's demand.

In order to solve the technical problem, the technical scheme of the utility model is that:

an EMC power module for a sensor comprises a power-on slow start circuit, a voltage conversion circuit, a voltage and current detection circuit and an EMC energy storage capacitor bank;

the power-on slow starting circuit is suitable for being connected with an external input power supply and supplying power to the voltage conversion circuit and the voltage and current detection circuit;

the voltage conversion circuit is suitable for converting an external input power supply into a voltage required by the sensor;

the voltage and current detection circuit is suitable for detecting the working voltage and current parameters of the power supply module;

the EMC energy storage capacitor bank is suitable for releasing electric energy when lightning surge causes equipment to be powered off instantly.

Further, the EMC power module for a sensor includes:

and the overvoltage protection circuit is suitable for controlling the output voltage of the voltage conversion circuit within the intrinsic safety range.

Further, the EMC power module for a sensor includes:

the protection circuit comprises an anti-reverse connection protection circuit, wherein the input end of the anti-reverse connection protection circuit is connected with an external input power supply, and the output end of the anti-reverse connection protection circuit is connected with a power-on slow start circuit.

After the technical scheme is adopted, the utility model discloses to go up electric slow start circuit, EMC energy storage capacitor group, voltage conversion circuit, overvoltage crowbar and voltage current detection circuit integration setting. The voltage and the current of the power supply module can be monitored in real time, and the working state of the power supply module can be efficiently diagnosed and analyzed; the EMC energy storage capacitor bank can inhibit electromagnetic interference caused by complex industrial and mining underground coal mines, and the output continuity of the power supply module is ensured; the power-on slow starting circuit restrains the current impact at the moment of electrifying the sensor, and improves the working stability of the sensor. The utility model discloses the integrated level is high, and is with low costs, and the sexual valence relative altitude can be applied to various sensors in a flexible way, satisfies user's EMC upgrading transformation requirement.

Drawings

Fig. 1 is a schematic block diagram of an EMC power module for a sensor according to the present invention;

fig. 2 is a schematic circuit diagram of the power-on slow start circuit of the present invention;

fig. 3 is a schematic circuit diagram of the voltage conversion circuit of the present invention;

fig. 4 is a schematic circuit diagram of the voltage-current detection circuit of the present invention;

fig. 5 is a schematic circuit diagram of the overvoltage protection circuit of the present invention;

fig. 6 is a schematic circuit diagram of the EMC energy storage capacitor bank of the present invention;

fig. 7 is the utility model discloses a whole circuit schematic diagram of EMC power module for sensor.

Detailed Description

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.

As shown in fig. 1 to 7, an EMC power module for a sensor includes a power-on slow start circuit, a voltage conversion circuit, a voltage and current detection circuit, and an EMC energy storage capacitor bank.

The power-on slow starting circuit is suitable for being connected with an external input power supply and supplying power for the voltage conversion circuit and the voltage and current detection circuit, and the input voltage range of the external input power supply is DC 9-30V. As shown in fig. 2, the model of the fet Q1 is IRFU9120, the voltage of the capacitor C7 is zero at the moment of power-on, at this time, Vgs of the fet Q1 is 0, the fet Q1 is not turned on, and as the capacitor C7 is charged, Vgs is gradually increased, and the fet Q1 is gradually turned on, so that the current is gradually increased, and finally, the fet Q1 is completely turned on, which achieves the purpose of power-on slow start, and prevents large current from generating on the input side to affect other devices.

The voltage conversion circuit is suitable for converting an external input power into a voltage required by the sensor, as shown in fig. 3, the power conversion chip U2 adopts LMR16020S, in the embodiment, the input voltage range is DC 9-30V, and the power conversion chip U2 converts a DC 3.3V output voltage to provide a power for the sensor.

The voltage and current detection circuit is suitable for detecting the working voltage and current parameters of the power supply module, as shown in fig. 4, the resistors R5 and R7 transmit the voltage of an input power supply to a single chip microcomputer in a sensor for collection through voltage division, the current is amplified through a chip U1 through the voltage on a collection current sampling resistor R8 and the voltage on the R9, the 7 pin of the chip U1 transmits the amplified signal to the single chip microcomputer in the sensor for collection, the detection range of the input current is 5-500 mA, the model of the chip U1 is LM358, the single chip microcomputer in the sensor transmits the collected voltage and current parameters to a safety monitoring system, the state of the power supply of the monitoring personnel equipment is prompted, and whether the equipment is abnormal or not is judged

EMC energy storage electric capacity group is suitable for when the thunderbolt surge leads to equipment to cut off the power supply in the twinkling of an eye, when equipment suffered the thunderbolt surge, leads to equipment to cut off the power supply in the twinkling of an eye, and EMC energy storage electric capacity group releases the electric energy and prevents to cut off the power supply this moment. As shown in FIG. 6, the electrolytic capacitor is mainly formed by connecting electrolytic capacitors C11, C2, C11 and C12 in parallel, wherein the electrolytic capacitors are 220uF/25V in type.

The EMC power module for the sensor comprises an overvoltage protection circuit, and the overvoltage protection circuit is suitable for controlling the output voltage of the voltage conversion circuit within an intrinsic safety range. As shown IN fig. 5, the overvoltage protection circuit is formed by connecting three sets of unidirectional thyristors C106D and a voltage regulator IN4733 IN parallel, when the output voltage exceeds the set voltage, the voltage regulator D10, D11 and D12 are broken down, and then the corresponding unidirectional thyristors D7, D8 and D9 are turned on. After the unidirectional silicon controlled rectifier is conducted, the internal resistance is very small, and the current is very large, so that the voltage is clamped at a very small voltage, and the purpose of voltage protection is achieved.

The EMC power module for the sensor comprises an anti-reverse connection protection circuit, wherein the input end of the anti-reverse connection protection circuit is connected with an external input power supply, and the output end of the anti-reverse connection protection circuit is connected with a power-on slow starting circuit to prevent the positive and negative electrodes of the external input power supply from being connected with a reverse burning circuit. As shown in fig. 7, the reverse connection prevention protection circuit is formed by connecting diodes D1, D2 and D3 in series, wherein the model of the diode is SS 14.

The above embodiments further describe the technical problems, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. An EMC power module for sensor which characterized in that: the power-on slow start circuit comprises a power-on slow start circuit, a voltage conversion circuit, a voltage and current detection circuit and an EMC energy storage capacitor set;

the power-on slow starting circuit is suitable for being connected with an external input power supply and supplying power to the voltage conversion circuit and the voltage and current detection circuit;

the voltage conversion circuit is suitable for converting an external input power supply into a voltage required by the sensor;

the voltage and current detection circuit is suitable for detecting the working voltage and current parameters of the power supply module;

the EMC energy storage capacitor bank is suitable for releasing electric energy when lightning surge causes equipment to be powered off instantly.

2. The EMC power module for the sensor as claimed in claim 1, comprising:

and the overvoltage protection circuit is suitable for controlling the output voltage of the voltage conversion circuit within the intrinsic safety range.

3. The EMC power module for the sensor as claimed in claim 1, comprising:

the protection circuit comprises an anti-reverse connection protection circuit, wherein the input end of the anti-reverse connection protection circuit is connected with an external input power supply, and the output end of the anti-reverse connection protection circuit is connected with a power-on slow start circuit.

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