CN215871258U - Intelligent continuous power supply control device for three-phase motor - Google Patents

Abstract

The intelligent continuous power supply control device for the three-phase motor comprises a power supply incoming line part and a secondary loop part, wherein the power supply incoming line part comprises a power supply incoming line W1 and a power supply incoming line W2, the power supply incoming lines W1 and W2 are connected with a bus W3, and main contacts of a load switch QS1 and a contactor KM1 are connected to the power supply incoming line W1 in series; a main contact of a load switch QS2 and a contactor KM2 are connected in series with a power supply inlet wire W1; the utility model aims to provide an intelligent continuous power supply control device of a three-phase motor, which has a manual control function and can realize the power failure, undervoltage and overload protection of a double-circuit power supply.

Description

Intelligent continuous power supply control device for three-phase motor

Technical Field

The utility model belongs to the technical field of double-circuit power supply control, and particularly relates to an intelligent continuous power supply control device for a three-phase motor.

Background

At present, the requirement of dual-power continuous power supply in one kind of load power supply is strict, in order to meet the requirement of modern industrial production application, a three-phase motor is required to have higher speed regulation precision, a larger speed regulation range and a faster response speed, the three-phase motor can not normally work due to factors such as overvoltage, undervoltage, overlarge current, higher temperature, insulation damage and the like in actual application, so that industrial production is influenced, and the conventional leakage protection switch, circuit breaker and open-phase protection equipment can break a motor working circuit aiming at a certain abnormal condition of an external circuit to protect the motor, but cannot judge whether the three-phase motor normally works or not and cannot inform a user of the current fault condition.

In order to solve the technical defects, the patent document with the publication number of CN209642306U discloses a two-way self-protection three-phase motor intelligent controller, which includes a voltage acquisition unit for acquiring voltage data of three phases of a motor; the first current acquisition unit and the second current acquisition unit are used for acquiring a main current data processor of three phases of the motor and judging a fault state according to voltage data and current data; the wireless transmission unit is used for transmitting the voltage data, the current data and the fault state in a wireless mode; the main processor is respectively and electrically connected with the voltage acquisition unit, the first current acquisition unit, the second current acquisition unit and the wireless transmission unit; the main processor comprises a voltage processing unit, a current processing unit and a power processing unit, wherein the voltage processing unit is electrically connected with the voltage acquisition unit, the current processing unit is electrically connected with the first current acquisition unit and the second current acquisition unit respectively, and the power processing unit is electrically connected with the voltage acquisition unit, the first current acquisition unit and the second current acquisition unit respectively; the three-phase current voltage and the three-phase current of the motor can be collected, whether a current input circuit is normal or not is judged by processing voltage data, whether the motor is normal or not is judged by the collected current data, working power is obtained by calculating the collected voltage data and the collected current data, whether abnormal conditions occur in the motor is judged by the working power, so that the motor and a working circuit can be subjected to fault judgment, if faults occur, a power supply can be timely cut off for processing, and equipment is not damaged.

However, in the above prior art, the main processor is mainly used as a core to monitor and emergency process the fault, and in case of a fault occurring in the main processor itself, the normal operation of the function of the whole system is affected.

Disclosure of Invention

The utility model aims to provide an intelligent continuous power supply control device of a three-phase motor, which has a manual control function and can realize the power failure, undervoltage and overload protection of a double-circuit power supply.

The intelligent continuous power supply control device for the three-phase motor comprises a power supply incoming line part and a secondary loop part, wherein the power supply incoming line part comprises a power supply incoming line W1 and a power supply incoming line W2, the power supply incoming lines W1 and W2 are connected with a bus W3, and main contacts of a load switch QS1 and a contactor KM1 are connected to the power supply incoming line W1 in series; a main contact of a load switch QS2 and a contactor KM2 are connected in series with a power supply inlet wire W1;

the secondary circuit part comprises a control circuit of a contactor KM1 and a control circuit of a contactor KM2, wherein the control circuit of the contactor KM1 comprises a normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of a contactor KM2, a normally closed contact of an intermediate relay KA3 and a coil of the contactor KM1 which are connected in series; a second pair of normally open contacts KM1-1 of the contactor KM1, a normally open contact of the intermediate relay KA1, a third pair of normally closed contacts KM2-3 of the contactor KM2 and a second pair of normally closed contacts 4KA-2 of the voltage relay are connected in parallel to two ends of a normally open button SB 1;

the control loop of the contactor KM2 comprises a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of a contactor KM1, a normally closed contact of an intermediate relay KA4 and a coil of a contactor KM2 which are connected in series; the second pair of normally open contacts KM2-1 of the contactor KM2, the normally open contact of the intermediate relay KA2, the third pair of normally closed contacts KM1-3 of the contactor KM1 and the second pair of normally closed contacts 3KA-2 of the voltage relay are connected in parallel to two ends of a normally open button SB 3.

A thermal relay FR1 is also connected in series with the power supply inlet wire W1, and a first pair of normally closed contacts FR1-1 of the thermal relay FR1 is connected in series with a control loop of the contactor KM 1; a thermal relay FR2 is also connected in series with the power supply inlet wire W2, and a second pair of normally closed contacts FR2-1 of the thermal relay FR2 is connected in series in the control loop of the contactor KM 2.

A normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of the contactor KM2, a normally closed contact of an intermediate relay KA3, a coil of the contactor KM1 and a first pair of normally closed contacts FR1-1 of a thermal relay FR1 are sequentially connected in series from the input end to the output end of a control loop of the contactor KM 1; a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of the contactor KM1, a normally closed contact of an intermediate relay KA4, a coil of the contactor KM2 and a second pair of normally closed contacts FR2-1 of a thermal relay FR2 are sequentially connected in series from the input end to the output end of a control loop of the contactor KM 2.

Fuse FU1 is also connected in series to power inlet W1, and fuse FU2 is also connected in series to power inlet W2.

A coil of a voltage relay 1KA of a voltage transformer TV1 and a voltage transformer TV1 is connected between a three-phase incoming line end and a load switch QS1 on a power supply incoming line W1; a coil of a voltage transformer TV2 and a coil of a voltage relay 2KA of a voltage transformer TV2 are connected to a power supply inlet wire W2 and between a three-phase inlet wire end and a load switch QS 2;

a coil of a voltage relay 3KA of a voltage transformer TV3 and a voltage transformer TV3 is connected to the power inlet wire W1 and the end close to the load, and a coil of a voltage relay 4KA of a voltage transformer TV4 and a voltage transformer TV3 is connected to the power inlet wire W2 and the end close to the load;

the controller is further provided with an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3, an intermediate relay KA4, a button SB5, a button SB6, a second pair of normally closed contacts KM1-2 of the contactor KM1, a second pair of normally closed contacts KM2-2 of the contactor KM2, a voltage relay 1KA and a voltage relay 2KA which are respectively connected with each contact of an IO port of the controller.

Compared with the prior art, the utility model has the following technical effects:

the utility model comprises two paths of incoming line power supplies, when the system works normally, only one path can be connected with a bus W3 through a load switch, a fuse, a thermal relay, a contactor, and when one path is overloaded (judged by the thermal relay), power-off and undervoltage (judged by a voltage transformer and a voltage relay), the other path is automatically switched; meanwhile, the working mode can be switched manually/manually through the button SB5, and the power supply can be switched regularly through the SB6 (the switching period can be set through the touch screen), so that the use is flexible and convenient, and the practicability is high.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a circuit diagram of the power inlet portion of the present invention;

FIG. 2 is a circuit diagram of a secondary loop portion of the present invention;

FIG. 3 is a diagram of a controller and its peripheral circuits according to the present invention.

Detailed Description

An intelligent continuous power supply control device for a three-phase motor comprises a power supply wire inlet part and a secondary circuit part;

as shown in fig. 1, the power inlet part comprises a power inlet wire W1 and a power inlet wire W2, the power inlet wires W1 and W2 are connected with a bus W3, and a main contact of a load switch QS1 and a contactor KM1 are connected in series with the power inlet wire W1; a main contact of a load switch QS2 and a contactor KM2 are connected in series with a power supply inlet wire W1;

as shown in fig. 2, the secondary circuit part comprises a control circuit of a contactor KM1 and a control circuit of a contactor KM2, and the control circuit of the contactor KM1 comprises a normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of a contactor KM2, a normally closed contact of an intermediate relay KA3 and a coil of a contactor KM1 which are connected in series; a second pair of normally open contacts KM1-1 of the contactor KM1, a normally open contact of the intermediate relay KA1, a third pair of normally closed contacts KM2-3 of the contactor KM2 and a second pair of normally closed contacts 4KA-2 of the voltage relay are connected in parallel to two ends of a normally open button SB 1;

the control loop of the contactor KM2 comprises a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of a contactor KM1, a normally closed contact of an intermediate relay KA4 and a coil of a contactor KM2 which are connected in series; the second pair of normally open contacts KM2-1 of the contactor KM2, the normally open contact of the intermediate relay KA2, the third pair of normally closed contacts KM1-3 of the contactor KM1 and the second pair of normally closed contacts 3KA-2 of the voltage relay are connected in parallel to two ends of a normally open button SB 3.

A thermal relay FR1 is also connected in series with the power supply inlet wire W1, and a first pair of normally closed contacts FR1-1 of the thermal relay FR1 is connected in series with a control loop of the contactor KM 1; a thermal relay FR2 is also connected in series with the power supply inlet wire W2, and a second pair of normally closed contacts FR2-1 of the thermal relay FR2 is connected in series in the control loop of the contactor KM 2.

A normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of the contactor KM2, a normally closed contact of an intermediate relay KA3, a coil of the contactor KM1 and a first pair of normally closed contacts FR1-1 of a thermal relay FR1 are sequentially connected in series from the input end to the output end of a control loop of the contactor KM 1; a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of the contactor KM1, a normally closed contact of an intermediate relay KA4, a coil of the contactor KM2 and a second pair of normally closed contacts FR2-1 of a thermal relay FR2 are sequentially connected in series from the input end to the output end of a control loop of the contactor KM 2.

Fuse FU1 is also connected in series to power inlet W1, and fuse FU2 is also connected in series to power inlet W2.

A coil of a voltage relay 1KA of a voltage transformer TV1 and a voltage transformer TV1 is connected between a three-phase incoming line end and a load switch QS1 on a power supply incoming line W1; a coil of a voltage transformer TV2 and a coil of a voltage relay 2KA of a voltage transformer TV2 are connected to a power supply inlet wire W2 and between a three-phase inlet wire end and a load switch QS 2;

a coil of a voltage relay 3KA of a voltage transformer TV3 and a voltage transformer TV3 is connected to the power inlet wire W1 and the end close to the load, and a coil of a voltage relay 4KA of a voltage transformer TV4 and a voltage transformer TV3 is connected to the power inlet wire W2 and the end close to the load;

as shown in fig. 3, the controller is further included, and the intermediate relay KA1, the intermediate relay KA2, the intermediate relay KA3, the intermediate relay KA4, the button SB5, the button SB6, a second pair of normally closed contacts KM1-2 of the contactor KM1, a second pair of normally closed contacts KM2-2 of the contactor KM2, the voltage relay 1KA and the voltage relay 2KA are respectively connected to contacts of the IO port of the controller.

Further, the following examples are provided to enable one of ordinary skill in the art to further understand:

when the bus-bar type power supply device operates normally, only one of power supply incoming lines W1 (A1, B1 and C1) and power supply incoming lines W2 (A2, B2 and C2) is communicated with a bus W3. Before working, load switches QS 1-QS 2 are all put in, and contacts of voltage relays of voltage transformers TV 1-TV 4 are all connected to input contacts I0.4-I0.7 of a controller, so that voltages of a power supply incoming line W1 and a power supply incoming line W2 are detected, and the power supply incoming line W1 and the power supply incoming line W2 participate in power supply switching control.

In a secondary circuit of the device, a normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of a contactor KM2, a normally closed contact of an intermediate relay KA3, a normally closed contact of a thermal relay FR1 and a coil of a contactor KM1 form a control circuit of a contactor KM1, and a second pair of normally open contacts KM1-1 of the contactor KM1, a normally open contact of the intermediate relay KA1, a third pair of normally closed contacts KM2-3 of the contactor KM2 and a second pair of normally closed contacts 4KA-2 of a voltage relay are all connected with a normally open button SB1 in parallel.

In a secondary circuit of the device, a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of a contactor KM1, a normally closed contact of an intermediate relay KA4, a normally closed contact of a thermal relay FR2 and a coil of a contactor KM2 form a control circuit of a contactor KM2, and a second pair of normally open contacts KM2-1 of the contactor KM2, a normally open contact of the intermediate relay KA2, a third pair of normally closed contacts KM1-3 of the contactor KM1 and a second pair of normally closed contacts 3KA-2 of a voltage relay are all connected with a normally open button SB3 in parallel.

The power supply switching working mode is divided into manual and automatic. The normally open button SB1 is triggered manually, and as the normally closed button SB2, the second pair of normally closed contacts KM2-2 of the contactor KM2, the normally closed contacts of the intermediate relay KA3 and the first pair of normally closed contacts FR1-1 of the thermal relay FR1 are all closed, the coil of the contactor KM1 is electrified, the main contact of the contactor KM1 is closed, the power supply incoming line W1 (A1, B1 and C1) is communicated with the power supply bus W3, and the power supply W1 supplies power to the motor. Meanwhile, a second pair of normally open contacts KM1-1 of the contactor KM1 is self-locked in a closed loop, and continuous power supply is kept. When the normally closed button SB2 is triggered, the coil of the contactor KM1 loses power, the main contact of the contactor KM1 is disconnected, the power supply inlet wire W1 (A1, B1 and C1) is disconnected with the power supply bus W3, and the power supply W2 stops supplying power to the motor.

The normally open button SB3 is triggered manually, and as the normally closed button SB4, the second pair of normally closed contacts KM1-2 of the contactor KM1, the normally closed contacts of the intermediate relay KA4 and the first pair of normally closed contacts FR2-1 of the thermal relay FR2 are all closed, the coil of the contactor KM2 is electrified, the main contact of the contactor KM2 is closed, the power supply incoming line W2 (A2, B2 and C2) is communicated with the power supply bus W3, and the power supply W2 supplies power to the motor. Meanwhile, a second pair of normally open contacts KM2-1 of the contactor KM2 is self-locked in a closed loop, and continuous power supply is kept. When the normally closed button SB4 is triggered, the coil of the contactor KM2 loses power, the main contact of the contactor KM2 is disconnected, the power supply inlet wire W2 (A2, B2 and C2) is disconnected with the power supply bus W3, and the power supply W2 stops supplying power to the motor.

In a manual mode, when a coil of KM1 loses power, a third pair of normally closed contacts KM1-3 of the contactor KM1 is closed, and a second pair of normally closed contacts 3KA-2 of a voltage relay 3KA of a voltage transformer TV3 is closed (representing that a power supply inlet wire W1 loses power), the coil of the contactor KM2 is automatically powered on, a main contact of KM2 of the contactor is closed, a power supply inlet wire W2 (A2, B2 and C2) is communicated with a power supply bus W3, the power supply W2 supplies power to the motor, and the power supply inlet wire W1 is automatically switched to the power supply inlet wire W2 when in a fault.

In a manual mode, when a coil of the KM2 is powered off, a third pair of normally closed contacts KM2-3 of the contactor KM2 is closed, and a second pair of normally closed contacts 4KA-2 of a voltage relay 4KA of a voltage transformer TV4 is closed (representing that a power supply inlet wire W2 is powered off), the coil of the contactor KM1 is automatically powered on, a main contact of the contactor KM1 is closed, a power supply inlet wire W1 (A1, B1 and C1) is communicated with a power supply bus W3, the power supply W1 supplies power to the motor, and the power supply inlet wire W2 is automatically switched to the power supply inlet wire W1 when in a fault.

In an automatic mode, SB5 and SB6 are triggered firstly, and after I0.0 of the controller receives a signal, Q0.0 and Q0.2 are switched on, and KA1 and KA3 are switched on. Then the normally open contact of KA1 is closed, the main contact of KM1 of contactor is closed, power inlet wire W1 (A1, B1, C1) is connected with power bus W3, power W1 supplies power to the motor, timing (can be set through a touch screen) is up, Q0.2 is opened, Q0.1 is powered, and KA3 and KA2 are powered. The normally closed contact of KA3 is disconnected, the coil of the contactor KM1 loses power, the main contact of KM1 of the contactor is disconnected, a power incoming line W1 (A1, B1 and C1) is disconnected with a power bus W3, the power supply W2 stops supplying power to the motor, on the other hand, the normally open contact of KA2 is closed, the main contact of KM2 of the contactor is closed, the power incoming line W2 (A2, B2 and C2) is connected with the power bus W3, the power supply W2 supplies power to the motor, and power switching is automatically realized in a circulating mode.

In an automatic mode, the function of automatically switching to the power inlet wire W2 when the power inlet wire W1 fails and automatically switching to the power inlet wire W1 when the power inlet wire W2 fails can also be realized by the same manual operation.

By adopting the structure, the functions of switching of power failure, undervoltage, overload and the like of the double-circuit power supply, realizing timing switching and the like through the touch screen and having strong applicability can be realized.

Claims (5)

1. The intelligent continuous power supply control device for the three-phase motor is characterized by comprising a power supply incoming line part and a secondary loop part, wherein the power supply incoming line part comprises a power supply incoming line W1 and a power supply incoming line W2, the power supply incoming lines W1 and W2 are connected with a bus W3, and a main contact of a load switch QS1 and a contactor KM1 is connected to the power supply incoming line W1 in series; a main contact of a load switch QS2 and a contactor KM2 are connected in series with a power supply inlet wire W1;

the secondary circuit part comprises a control circuit of a contactor KM1 and a control circuit of a contactor KM2, wherein the control circuit of the contactor KM1 comprises a normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of a contactor KM2, a normally closed contact of an intermediate relay KA3 and a coil of the contactor KM1 which are connected in series; a second pair of normally open contacts KM1-1 of the contactor KM1, a normally open contact of the intermediate relay KA1, a third pair of normally closed contacts KM2-3 of the contactor KM2 and a second pair of normally closed contacts 4KA-2 of the voltage relay are connected in parallel to two ends of a normally open button SB 1;

the control loop of the contactor KM2 comprises a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of a contactor KM1, a normally closed contact of an intermediate relay KA4 and a coil of a contactor KM2 which are connected in series; the second pair of normally open contacts KM2-1 of the contactor KM2, the normally open contact of the intermediate relay KA2, the third pair of normally closed contacts KM1-3 of the contactor KM1 and the second pair of normally closed contacts 3KA-2 of the voltage relay are connected in parallel to two ends of a normally open button SB 3.

2. The device according to claim 1, characterized in that a thermal relay FR1 is connected in series with the power supply inlet wire W1, and a first pair of normally closed contacts FR1-1 of the thermal relay FR1 is connected in series with the control loop of the contactor KM 1; a thermal relay FR2 is also connected in series with the power supply inlet wire W2, and a second pair of normally closed contacts FR2-1 of the thermal relay FR2 is connected in series in the control loop of the contactor KM 2.

3. The device as claimed in claim 2, characterized in that a normally open button SB1, a normally closed button SB2, a second pair of normally closed contacts KM2-2 of the contactor KM2, a normally closed contact of the intermediate relay KA3, a coil of the contactor KM1, a first pair of normally closed contacts FR1-1 of the thermal relay FR1 are connected in series in sequence from the input end to the output end of the control loop of the contactor KM 1; a normally open button SB3, a normally closed button SB4, a second pair of normally closed contacts KM1-2 of the contactor KM1, a normally closed contact of an intermediate relay KA4, a coil of the contactor KM2 and a second pair of normally closed contacts FR2-1 of a thermal relay FR2 are sequentially connected in series from the input end to the output end of a control loop of the contactor KM 2.

4. The apparatus of one of claims 1 to 3, wherein fuse FU1 is further connected in series to power supply line W1, and fuse FU2 is further connected in series to power supply line W2.

5. The device according to claim 4, characterized in that, a voltage transformer TV1 and a coil of a voltage relay 1KA of the voltage transformer TV1 are connected on a power supply inlet line W1 and between a three-phase inlet line end and a load switch QS 1; a coil of a voltage transformer TV2 and a coil of a voltage relay 2KA of a voltage transformer TV2 are connected to a power supply inlet wire W2 and between a three-phase inlet wire end and a load switch QS 2;

a coil of a voltage relay 3KA of a voltage transformer TV3 and a voltage transformer TV3 is connected to the power inlet wire W1 and the end close to the load, and a coil of a voltage relay 4KA of a voltage transformer TV4 and a voltage transformer TV3 is connected to the power inlet wire W2 and the end close to the load;

the controller is further provided with an intermediate relay KA1, an intermediate relay KA2, an intermediate relay KA3, an intermediate relay KA4, a button SB5, a button SB6, a second pair of normally closed contacts KM1-2 of the contactor KM1, a second pair of normally closed contacts KM2-2 of the contactor KM2, a voltage relay 1KA and a voltage relay 2KA which are respectively connected with each contact of an IO port of the controller.

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