CN212627158U

CN212627158U - Secondary power-on safety protection circuit of motor equipment

Info

Publication number: CN212627158U
Application number: CN202021669459.8U
Authority: CN
Inventors: 周天沛
Original assignee: Xuzhou College of Industrial Technology
Current assignee: Xuzhou Xuanteng Machinery Co ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-02-26
Anticipated expiration: 2030-08-12

Abstract

When a circuit of the motor equipment is electrified, after a switch K1 is closed, a relay J1 is electrified and attracted, a normally open contact J1-1 of the relay J1 is attracted, a motor M works, if power is suddenly cut off under the condition that the switch K1 is closed at the moment, then power is supplied again, a triode BG1 is conducted before a triode BG2, so that the triode BG2 is cut off, the relay J1 is powered off, the normally open contact J1-1 of the relay J1 is not attracted, and the motor M does not work; at the moment, only the switch K1 is disconnected firstly, so that the triode BG1 is cut off, then the switch K1 is closed, the triode BG2 is conducted, the relay J1 is electrified again, the normally open contact J1-1 of the relay J1 is attracted, the motor M works again, the circuit can control the switch K1 to be disconnected firstly and then closed, the motor M works again, electric energy is saved, and the safety of operators of motor equipment can be ensured.

Description

Secondary power-on safety protection circuit of motor equipment

Technical Field

The utility model relates to a safety protection circuit specifically is an electrical equipment secondary comes electrical safety protection circuit, belongs to safety protection technical field.

Background

The motor is mainly used for generating driving torque and serving as a power source of an electric appliance or various machines, the motor equipment can be powered off in the working process, the motor can stop working at the moment, power supply is recovered if a motor switch is still closed, the motor can work again suddenly, certain danger is caused to operating personnel, and meanwhile, the service life of the motor can be influenced by frequent starting and stopping in the process of repeatedly powering off and powering on.

Disclosure of Invention

To the problem that above-mentioned prior art exists, the utility model provides an electrical equipment secondary comes the electric safety protection circuit, electrical equipment have a power failure suddenly under the condition of incoming telegram again, this circuit can control switch break off earlier closed again, makes motor M reworking, practices thrift the electric energy, and can not reduce the life of motor owing to frequently opening and stopping the motor.

In order to achieve the purpose, the utility model provides a secondary incoming call safety protection circuit of motor equipment, including resistance R1 ~ R4, electric capacity C1, electrolytic capacitor C2 ~ C3, electric capacity C4 ~ C5, diode D1 ~ D2, zener diode DW1, triode BG1 ~ BG2, relay J1, normally open contact J1-1 of relay J1, motor M, switch K1;

the live wire L is respectively connected with one end of a normally open contact J1-1 of the relay J1 and one end of a capacitor C1, the other end of the normally open contact J1-1 of the relay J1 is connected with the zero line N after being connected with the motor M in series, the capacitor C5 is connected with two ends of the motor M in parallel, the other end of the capacitor C1 is connected with the anode of a diode D2, a resistor R1 is connected with two ends of a capacitor C1 in parallel, the cathode of a diode D2 is respectively connected with the cathode of a zener diode DW 27, the anode of an electrolytic capacitor C2, one end of a resistor R2 and one end of a switch K1, the other end of the switch K1 is respectively connected with one end of a resistor R1, the cathode of a diode D1 and one end of the relay J1, the other end of the resistor R1 is respectively connected with the anode of the electrolytic capacitor C1, one end of the capacitor C1, the base of a triode BG1 and the collector of the triode BG1, the other end of the, The anode of the diode D1, the other end of the relay J1, the collector of the transistor BG2, the anode of the zener diode DW1, the cathode of the electrolytic capacitor C2, the cathode of the electrolytic capacitor C3, the other end of the resistor R4, the emitter of the transistor BG1, and the emitter of the transistor BG2 are all grounded.

As a further improvement of the utility model, the triodes BG1 and BG2 are NPN tubes, and the model is BC 337.

As a further improvement of the present invention, the diodes D1 and D2 are IN 4007.

As a further improvement of the present invention, the voltage stabilizing value of the zener diode DW1 is 12V.

As a further improvement of the utility model, the relay J1 is a DC relay with model number JRX-20F.

Compared with the prior art, the utility model comprises a resistor R1-R4, a capacitor C1, an electrolytic capacitor C2-C3, a capacitor C4-C5, diodes D1-D2, a voltage stabilizing diode DW1, a triode BG 1-BG 2, a relay J1, a normally open contact J1-1 of a relay J1, a motor M and a switch K1; when a motor equipment line is electrified, after a switch K1 is closed, a relay J1 is electrified and attracted, a normally open contact J1-1 of the relay J1 is attracted, a motor M works, if power is suddenly cut off under the condition that the switch K1 is closed at the moment, then power is supplied again, a triode BG1 is conducted before a triode BG2, so that the triode BG2 is cut off, the relay J1 is electrified, the normally open contact J1-1 of the relay J1 is not attracted, and the motor M does not work; at the moment, only the switch K1 is disconnected firstly, the triode BG1 is cut off, then the switch K1 is closed, the triode BG2 is conducted, the relay J1 is electrified again, the normally open contact J1-1 of the relay J1 is attracted, the motor M works again, the circuit can control the switch K1 to be disconnected firstly and then closed, the motor M works again, the electric energy is saved, the service life of the motor can not be shortened due to frequent starting and stopping of the motor, and the safety of operators of the motor equipment can be ensured.

Drawings

Fig. 1 is a schematic circuit diagram of the present invention.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, a secondary power-on safety protection circuit for motor equipment comprises resistors R1-R4, a capacitor C1, electrolytic capacitors C2-C3, capacitors C4-C5, diodes D1-D2, a zener diode DW1, triodes BG 1-BG 2, a relay J1, a normally open contact J1-1 of a relay J1, a motor M, and a switch K1; the triodes BG1 and BG2 are NPN tube type with model number BC 337; the type of the diodes D1 and D2 is IN 4007; the voltage stabilizing value of the voltage stabilizing diode DW1 is 12V; the relay J1 is a direct current relay with model number JRX-20F.

The resistance values of these elements in fig. 1 are well known and can be adjusted as required by those skilled in the art.

The working principle of the utility model is as follows: as shown in fig. 1, when the line of the motor apparatus is powered, at this time, the switch K1 is in an off state, because the capacitor C4 has the function of isolating direct current, the transistor BG1 is turned off, the power supply charges the electrolytic capacitor C3 through the resistor R2, when the charging is 0.7V, the transistor BG2 is turned on, when the switch K1 is turned on, because the transistor BG2 is already turned on, the transistor BG2 is turned on in a pilot mode, the transistor BG2 is turned on, so that the base voltage of the transistor BG1 is zero, the transistor BG1 is turned off, the relay J1 is powered, the normally open contact J1-1 of the relay J1 is attracted, and the motor M operates.

If power is suddenly cut off at the moment, power supply is recovered under the condition that the switch K1 is closed, the base voltage of the triode BG1 is turned on by 0.7V before the base voltage of the triode BG2 (the base voltage of the triode BG2 is obtained by charging an electrolytic capacitor C3 through a resistor R2 by a power supply), so that the triode BG1 is turned on first, the base voltage of the triode BG1 is reduced to be below 0.3V after the triode BG1 is turned on, the triode BG2 is turned off, the relay J1 is powered off, the normally open contact J1-1 of the relay J1 is not attracted, and the motor M does not work; at this time, only when the switch K1 is turned off first to cut off the transistor BG1 and then the switch K1 is turned on, the transistor BG2 is turned on, the relay J1 is powered on again to pull in, and the motor M can work again.

Claims

1. A safety protection circuit for secondary power on of motor equipment is characterized by comprising resistors R1-R4, a capacitor C1, electrolytic capacitors C2-C3, capacitors C4-C5, diodes D1-D2, a voltage stabilizing diode DW1, triodes BG 1-BG 2, a relay J1, a normally open contact J1-1 of a relay J1, a motor M and a switch K1;

2. The safety protection circuit for the secondary call of the motor equipment as claimed in claim 1, wherein the transistors BG1 and BG2 are NPN tube type, and BC337 type.

3. The secondary-power-on safety protection circuit for the motor equipment as claimed IN claim 1, wherein the type of the diodes D1 and D2 is IN 4007.

4. The secondary call safety protection circuit for the electric motor equipment according to claim 1, wherein the voltage stabilizing value of the voltage stabilizing diode DW1 is 12V.

5. The electrical equipment secondary call safety protection circuit as claimed in claim 1, wherein the relay J1 is a DC relay with model number JRX-20F.