CN212811266U

CN212811266U - Anti-misoperation relay protection output control circuit and application equipment thereof

Info

Publication number: CN212811266U
Application number: CN202021030560.9U
Authority: CN
Inventors: 马佳来; 束建强; 兰飞飞; 任斌; 王�琦
Original assignee: Nanjing Hanyuan Technology Co ltd
Current assignee: Nanjing Hanyuan Technology Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-03-26
Anticipated expiration: 2030-06-08

Abstract

The utility model relates to a distribution automation terminal field discloses a control circuit is driven out in relay protection of preventing maloperation and application apparatus thereof, has solved current relay when driving out the operation, produces the problem of malfunction because of the state is undefined easily, and its technical scheme main points are including dual logic control circuit, dual logic control circuit includes including relay power supply control circuit and export relay control circuit, relay power supply control circuit is the common drive circuit of dual control signal, export relay control circuit is the circuit through second MOS pipe control relay coil, and dual logic control circuit makes every control signal's state clear and definite, can effectively avoid the driving out malfunction in the product operation in the control of driving out.

Description

Anti-misoperation relay protection output control circuit and application equipment thereof

Technical Field

The utility model relates to a distribution automation terminal field, more specifically say, it relates to a control circuit is opened in relay protection of preventing maloperation and application apparatus thereof.

Background

Along with the gradual intellectualization of the power industry, the requirements on the accuracy and the sensitivity of a power system are higher and higher, the normal operation of all the industries cannot be supported by the power industry, and simultaneously, along with the vigorous development of economy, huge pressure is brought to the power industry. In recent years, the capacity and complexity of a power system are continuously improved, and an output end of a power grid is also provided with more and more devices, so that a relay protection device is required to accurately perform operation, once the operation is given, other devices also need to perform corresponding operation, and therefore, the accuracy of an output part of a relay is very important. The existing traditional relay protection circuit only adds a pull-up resistor or a pull-down resistor on a control signal, most pins of a processor are in a high-impedance state, and meanwhile, the environment of a power system is complex, and the factors of interference are more, so that the state of the relay is not clear and false operation is generated when the relay is in an open operation. Such malfunction has a great influence on the safety of the entire power system, and also affects other industries and trades.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a control circuit is opened to relay protection of preventing maloperation, dual logic control circuit makes every control signal's state clear and definite, can effectively avoid the product in service to open the malfunction of opening in the control.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a control circuit is opened in relay protection of preventing maloperation, includes dual logic control circuit, dual logic control circuit includes relay power supply control circuit and export relay control circuit, relay power supply control circuit is the common drive circuit of dual control signal, export relay control circuit is the circuit through second MOS pipe control relay coil.

As the utility model discloses a preferred technical scheme, including current drive type triode and first MOS pipe in the relay power supply control circuit, current drive type triode receives dual control signal control, first MOS pipe inserts the relay power.

As an optimized technical scheme of the utility model, export relay control circuit is including GPIO, GPIO connects and controls the second MOS pipe.

As a preferred technical solution of the present invention, the relay power supply control circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, an NPN-type triode Q2, and an NMOS tube Q1, the resistor R1 is connected in series between the emitters of the GPIO _ KD1 and the triode Q2, the resistor R2 is connected in series between the emitters of the power supply DC3.3V and the triode Q2, the resistor R3 is connected in series between the BS of the GPIO and the base of the triode Q2, the resistor R4 is connected in series between the power supply VCC and the collector of the triode Q2, the capacitor C2 is connected in series between the power supply VCC and the ground GND, the capacitor C2 is connected in parallel with the capacitor C2, the capacitor C2 is connected in series between the power supply DZ _ VCC and the ground GND, the gate of the NMOS tube Q2 is connected to the collector, the source of the NMOS tube Q2 is connected to the power supply, and the drain of the power.

As a preferred technical scheme of the utility model, export relay control circuit is including resistance R5, resistance R6, diode D1, electric capacity C4, electric capacity C5 and NMOS pipe Q3, resistance R5 connects in series between GPIO _ KD2 and NMOS pipe Q3's grid, resistance R3 connects in series between NMOS pipe Q3's grid and source electrode, relay 4 mouth and diode D1 just all connect NMOS pipe Q3 drain electrode respectively, relay 5 mouth and diode D1 negative pole all connect power supply DZ _ VCC, NMOS pipe Q3's source ground connection GND, electric capacity C4 connects in series between power DZ _ VCC and GND, electric capacity C5 and electric capacity C4 connect in parallel, the D01 of relay 1 mouth links to each other, the D02 serial ports of GPIO links to each other with relay 8 mouth.

As a preferred technical solution of the present invention, the diode D1 is a freewheeling diode.

The utility model provides an application equipment of relay protection switching-on control circuit of preventing maloperation, includes the export relay, the relay is connected with foretell dual logic control circuit.

To sum up, the utility model discloses following beneficial effect has: the dual logic control circuit ensures that the state of each control signal is definite, the outlet opening action is not influenced even if local signals are influenced in the environment with any interference in any place, the response is quick and accurate, and the opening misoperation in the operation of a product can be effectively avoided in the opening control.

Drawings

Fig. 1 is the relay power supply control circuit of the present invention.

Fig. 2 is the outlet relay control circuit of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a relay protection opening control circuit for preventing maloperation, which comprises a double logic control circuit, wherein the double logic control circuit comprises a relay power supply control circuit and an outlet relay control circuit;

the relay power supply control circuit is a double-control signal common driving circuit, and the relay working power supply is simultaneously controlled by two paths of signals, so that the condition of mistaken conduction of a single signal due to electromagnetic interference or crosstalk of adjacent signal lines is effectively avoided; including current drive type triode and first MOS pipe in the relay power supply control circuit, current drive type triode receives dual control signal control, can effectively promote hardware circuit's robustness, and relay power supply is gone into to first MOS pipe, and relay power supply's on-off control realizes through first MOS pipe, can effectively reduce control switch's contact impedance, avoids reactive loss, promotes power supply efficiency.

Export relay control circuit is the circuit through second MOS pipe control relay coil, and is specific, export relay control circuit including GPIO, and GPIO connects and controls the second MOS pipe, and whether the coil of export relay circular telegram receives processor signal control, and the coil current passes through the second MOS pipe and is connected to GND. The mode that adopts treater control MOS pipe can effectively reduce the current consumption of treater pin, and the second MOS pipe accessible is great relay coil current simultaneously.

The utility model discloses a dual logic control circuit makes every control signal's state clear and definite, has any environment of disturbing in any place, just if local signal receives the influence, can not influence the export action of opening yet, and the response is quick and accurate, can effectively avoid the product in service to open the malfunction in opening the control.

As a specific embodiment of the present invention, as shown in fig. 1, the relay power supply control circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, an NPN-type transistor Q2, and an NMOS transistor Q1, wherein the resistor R1 is connected in series between the GPIO _ KD1 and the emitter of the transistor Q2, the resistor R2 is connected in series between the power supply DC3.3V and the emitter of the transistor Q2, the resistor R3 is connected in series between the BS of GPIO and the base of the transistor Q2, the resistor R4 is connected in series between the power supply VCC and the collector of the transistor Q2, the capacitor C2 is connected in series between the power supply VCC and the ground GND, the capacitor C2 is connected in parallel with the capacitor C2, the capacitor C2 is connected in series between the power supply DZ _ VCC and the ground GND, the gate of the NMOS transistor Q2 is connected to the collector of the transistor Q2, the source of the NMOS 2 is connected to the power supply.

The emitter of the transistor Q2 is connected to the power supply DC3.3V through a pull-up resistor R2, and then connected to the GPIO of the CPU, i.e., GPIO _ KD1, through a resistor R1. R2 ensures that the emitter of transistor Q2 is at a default high level to prevent the transistor Q2 from being turned on by mistake. The base of the transistor Q2 is connected to the BS of GPIO through a resistor R3. When only the BS signal is high and the GPIO _ KD1 is low, the triode Q2 is conducted, the collector potential of the triode Q2 is low, the Vgs voltage of the MOS transistor Q1 is close to-5V, the conduction condition is met, the power supply DZ _ VCC is electrified, and the potential is equal to VCC. When the BS signal and the GPIO _ KD1 signal are in other states, the transistor Q2 can not be conducted, the Vgs voltage of the MOS transistor Q1 is zero, the conduction condition is not met, and the power supply DZ _ VCC can not be powered. The capacitor C1, the capacitor C2 and the capacitor C3 play a role in power supply filtering, so that the power supply loop keeps the power supply stable in the process of channel switching.

As a specific embodiment of the present invention, as shown in fig. 2, the outlet relay control circuit includes a resistor R5, a resistor R6, a diode D1, a capacitor C4, a capacitor C5 and an NMOS tube Q3, the resistor R5 is connected in series between the gates of GPIO _ KD2 and NMOS tube Q3, a resistor R3 is connected in series between the gate and the source of NMOS tube Q3, the relay 4 port and the diode D1 are just connected to the drain of NMOS tube Q3, the cathodes of the relay 5 port and the diode D1 are connected to the power supply DZ _ VCC, the source of NMOS tube Q3 is grounded GND, the capacitor C4 is connected in series between the power supply DZ _ VCC and the ground GND, the capacitor C5 is connected in parallel to the capacitor C4, the GPIO D01 serial port is connected to the relay 1 port, and the GPIO D02 is connected to the relay 8 port.

The MOS tube Q3 is controlled by a signal GPIO _ KD2, when the GPIO _ KD2 signal is high, Vgs voltage of the MOS tube Q3 meets a conducting condition, and at the moment, the relay coil loop can be electrified and operated. When the GPIO _ KD2 signal is low, the Vgs voltage of the MOS tube Q3 is zero, and the relay coil is not powered and does not work. The NMOS tube is used as the switch device, so that the current consumption condition of the GPIO system can be effectively reduced, and the CPU works in a relatively more reasonable state. The diode D1 is a freewheeling diode and is used for releasing the energy generated by the electromotive force induced in the reverse direction of the coil at the moment of switching on and off the power supply of the coil of the relay. The capacitor C4 and the capacitor C5 play a role in power supply filtering and maintain the stability of the coil working power supply.

The utility model also provides a prevent relay protection of maloperation and open control circuit's application apparatus, including outlet relay, the relay is connected with foretell dual logic control circuit to this realizes the preventing maloperation that relay protection opened.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides an anti-malfunction relay protection opens out control circuit which characterized by: including dual logic control circuit, dual logic control circuit includes relay power supply control circuit and export relay control circuit, relay power supply control circuit is the common drive circuit of dual control signal, export relay control circuit is the circuit through second MOS pipe control relay coil.

2. The relay protection open-close control circuit for preventing malfunction according to claim 1, wherein: the relay power supply control circuit comprises a current-driven triode and a first MOS (metal oxide semiconductor) tube, wherein the current-driven triode is controlled by a dual control signal, and the first MOS tube is connected into the relay power supply.

3. The relay protection open-close control circuit for preventing malfunction according to claim 2, wherein: the outlet relay control circuit comprises a GPIO (general purpose input/output), and the GPIO is connected with and controls the second MOS tube.

4. The relay protection open-close control circuit for preventing malfunction according to claim 3, wherein: the relay power supply control circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, an NPN triode Q2 and an NMOS tube Q1, wherein the resistor R1 is connected in series between the emitters of the GPIO _ KD1 and the triode Q2, the resistor R2 is connected in series between the emitter of the power supply DC3.3V and the emitter of the triode Q2, the resistor R3 is connected in series between the BS of the GPIO and the base of the triode Q2, the resistor R4 is connected in series between the power supply VCC and the collector of the triode Q2, the capacitor C2 is connected in series between the power supply VCC and the ground GND, the capacitor C2 is connected in parallel with the capacitor C2, the capacitor C2 is connected in series between the power supply DZ _ VCC and the ground, the gate of the NMOS tube Q2 is connected with the collector of the triode Q2, the source of the NMOS tube Q2 is connected with the.

5. The relay protection open-close control circuit for preventing malfunction according to claim 4, wherein: the outlet relay control circuit comprises a resistor R5, a resistor R6, a diode D1, a capacitor C4, a capacitor C5 and an NMOS tube Q3, wherein the resistor R5 is connected in series between the GPIO _ KD2 and the grid electrode of the NMOS tube Q3, the resistor R3 is connected in series between the grid electrode and the source electrode of the NMOS tube Q3, the port 4 of the relay and the diode D1 are positively connected with the drain electrode of the NMOS tube Q3 respectively, the port 5 of the relay and the negative electrode of the diode D1 are connected with a power supply DZ _ VCC, the source electrode of the NMOS tube Q3 is grounded GND, the capacitor C4 is connected in series between a power supply DZ _ VCC and the ground GND, the capacitor C5 and the capacitor C4 are connected in parallel, the serial port D01 of the GPIO is connected with the port 1 of.

6. The relay protection open-close control circuit for preventing malfunction according to claim 5, wherein: the diode D1 is a freewheeling diode.

7. The utility model provides an application apparatus of relay protection switching-on control circuit of anti-maloperation which characterized by: comprising an outlet relay to which is connected a dual logic control circuit according to any of claims 1-6.