CN216016745U - Low-voltage motor restart control system based on programmable controller - Google Patents
Low-voltage motor restart control system based on programmable controller Download PDFInfo
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- CN216016745U CN216016745U CN202122346572.3U CN202122346572U CN216016745U CN 216016745 U CN216016745 U CN 216016745U CN 202122346572 U CN202122346572 U CN 202122346572U CN 216016745 U CN216016745 U CN 216016745U
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Abstract
The utility model discloses a low-voltage motor control system that restarts based on programmable controller, this system contain and contain programmable controller (1), LED display device (2), high-power relay (3), switching power supply (4), voltage transmitter (5), current transmitter (6). The system can realize the function of restarting the low-voltage motor in batches. The system adopts conventional equipment, has simple structure, and is economical and easy to implement.
Description
Technical Field
The utility model relates to a low-voltage motor restart control system based on programmable controller.
Background
The low-voltage motors of industrial and mining enterprises are in a large number, and the continuous production process is forced to be interrupted because the alternating current contactor is released due to electricity interference and the motor stops running. The motor restarting control cabinet is widely used in low-voltage substations, the existing low-voltage motor group restarting control system in the market at present adopts a mode of combining an industrial personal computer and a restarting control device, the equipment cost is high, operation personnel cannot maintain the system when the system fails, the maintenance is required by a system supplier, the maintenance period is long, and the professional requirement is high.
Disclosure of Invention
In order to solve the problem, the utility model provides a low-voltage motor restart control system based on programmable controller realizes low-voltage motor restart function in batches. The technical scheme of the utility model is that: the LED power supply comprises a programmable controller (1), an LED display device (2), a high-power relay (3), a switching power supply (4), a voltage transmitter (5) and a current transmitter (6); the connection mode among each equipment is as follows: the output end of the switching power supply (4) is connected with a power supply terminal of the programmable controller (1), the output ends of the voltage transmitter (5) and the current transmitter (6) are respectively connected with an analog quantity acquisition terminal of the programmable controller (1), the outlet of the programmable controller (1) is connected with a coil of the high-power relay (3), and the display port of the programmable controller (1) is connected with the LED display device (2).
A low-voltage motor restarting control system based on a programmable controller is characterized in that: the output signals of the voltage transmitter (5) and the current transmitter (6) can adopt 4-20 mA or 0-5V.
A low-voltage motor restarting control system based on a programmable controller is characterized in that: the programmable controller (1) is provided with a communication interface which can adopt an RS485 interface or an RJ45 interface.
A low-voltage motor restarting control system based on a programmable controller is characterized in that: the LED display device (2) can display voltage and current real-time sampling values, the running state of the motor and the restarting action time of the motor.
The utility model discloses a theory of operation:
as shown in figure 1, the output end of a switching power supply (4) is connected with a power supply terminal of a programmable controller (1), the output ends of a voltage transmitter (5) and a current transmitter (6) are respectively connected with an analog quantity acquisition terminal of the programmable controller (1), the outlet of the programmable controller (1) is connected with an action coil of a high-power relay (3), and the display port of the programmable controller (1) is connected with an LED display device (2).
When the system runs, a switching power supply (4) supplies power to a programmable controller (1), a voltage transmitter (5) acquires system bus voltage, a current transmitter (6) acquires incoming current, the output ends of the voltage transmitter (5) and the current transmitter (6) are connected to an analog quantity acquisition end of the programmable controller (1), the running state of a low-voltage motor is input to a switching value input end of the programmable controller (1), an outlet of the programmable controller (1) is connected to an action coil of a high-power relay (3), a normally open contact of the high-power relay (3) is connected to a control loop of the low-voltage motor, and the low-voltage motor is controlled to restart the motor when a system electricity shaking contactor is tripped.
When the system voltage of the system is recovered, the programmable controller (1) detects the system voltage collected by the voltage transmitter (5) in real time, when the system voltage is recovered to the normal voltage, the programmable controller (1) sends a motor starting command according to internal logic, the motor starting command enables the coil of the high-power relay (3) to act, the normally open contact of the high-power relay (3) is closed to conduct a low-voltage motor starting control loop to enable the motor to start and operate, meanwhile, the programmable controller (1) detects the incoming line current collected by the current transmitter (6) in time, when the incoming line current is larger than a certain value, in order to prevent the batch motor starting current from being overlarge, the programmable controller (1) stops sending a motor restarting command, and when the incoming line current is lower than the certain value, the programmable controller (1) sends commands for starting other motors again.
The LED display device (2) can display voltage and current real-time sampling values, a motor running state, motor restarting action time, restarting action success and failure information and the like, and meanwhile, the programmable controller (1) is provided with a communication interface and can transmit the restarting information to the power monitoring system through the communication interface.
The utility model discloses realize low-voltage motor restart control function.
The utility model discloses technological effect:
the utility model discloses it is exactly to realize low-voltage motor restart control function in batches. The characteristics are as follows:
1. the system adopts a programmable controller industrial personal computer, so that the cost is reduced.
2. The system has simple structure, adopts conventional equipment and is easy to implement. When equipment is in failure, operators can process the equipment by themselves, and the recovery time is short.
3. The function is comprehensive, and the voltage, the current and the motor running state, the restarting action sequence and the action time of each motor and the like can be displayed in real time.
4. The programmable controller belongs to conventional equipment, and operation and debugging personnel can compile internal logic by themselves, so that various control modes are realized, and the requirements of different starting modes are met.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention
Detailed Description
As shown in fig. 1, a low-voltage motor restart control system based on a programmable controller comprises a programmable controller 1, an LED display device 2, a high-power relay 3, a switching power supply 4, a voltage transmitter 5, and a current transmitter 6; the connection mode among each equipment is as follows: the output end of the switch power supply 4 is connected with a power supply terminal of the programmable controller 1, the output ends of the voltage transducer 5 and the current transducer 6 are respectively connected with an analog quantity acquisition terminal of the programmable controller 1, the outlet of the programmable controller 1 is connected with a coil of the high-power relay 3, and the display port of the programmable controller 1 is connected with the LED display device 2.
A low-voltage motor restarting control system based on a programmable controller is characterized in that: the output signals of the voltage transmitter 5 and the current transmitter 6 can adopt 4-20 mA or 0-5V.
A low-voltage motor restarting control system based on a programmable controller is characterized in that: the programmable controller 1 is provided with a communication interface, and the communication interface can adopt an RS485 interface or an RJ45 interface.
A low-voltage motor restarting control system based on a programmable controller is characterized in that: the LED display device 2 can display voltage and current real-time sampling values, the running state of the motor and the restarting action time of the motor.
The specific working process is as follows: as shown in fig. 1, the output end of the switching power supply (4) is connected to the power supply terminal of the programmable controller 1, the output ends of the voltage transducer 5 and the current transducer 6 are respectively connected to the analog quantity acquisition terminal of the programmable controller 1, the outlet of the programmable controller 1 is connected to the action coil of the high-power relay 3, and the display port of the programmable controller 1 is connected to the LED display device 2. When the system operates, a switching power supply 4 supplies power to the programmable controller 1, a voltage transmitter 5 acquires system bus voltage, a current transmitter 6 acquires incoming current, output ends of the voltage transmitter 5 and the current transmitter 6 are connected to an analog quantity acquisition end of the programmable controller 1, the operating state of the low-voltage motor is input to a switching value input end of the programmable controller 1, an outlet of the programmable controller 1 is connected to an action coil of a high-power relay 3, a normally open contact of the high-power relay 3 is connected to a control loop of the low-voltage motor, and the low-voltage motor is controlled to restart the motor when a system electric dazzling contactor is tripped.
When the system voltage of the system is recovered, the programmable controller 1 detects the system voltage collected by the voltage transmitter 5 in real time, when the system voltage is recovered to the normal voltage, the programmable controller 1 sends a motor starting command according to internal logic, the motor starting command enables the high-power relay 3 to act, a normally open contact of the high-power relay 3 is closed and conducted to a low-voltage motor starting control loop to start and operate the motor, meanwhile, the programmable controller 1 detects the incoming line current collected by the current transmitter 6, when the incoming line current is larger than a certain value, in order to prevent the batch motor starting current from being too large, the programmable controller 1 stops sending a motor restarting command, and when the incoming line current is lower than the certain value, the programmable controller 1 sends commands for starting other motors again.
The LED display device 2 can display information such as voltage and current real-time sampling values, a motor running state, motor restarting action time, restarting action success and failure information, and meanwhile, the programmable controller 1 is provided with a communication interface and can transmit the restarting information to the power monitoring system through the communication interface.
The above detailed description is made on the working principle and the embodiments of the present invention with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and the scope of the present invention is based on the changes and the improvements of the present invention. The utility model discloses can realize low-voltage motor restart control function in batches. The system is simple in structure and easy to implement. The system can select the quantity of analog quantity acquisition and input/output switching quantities of the programmable controller according to the quantity of the participating motors, and is more flexible.
Claims (4)
1. A low-voltage motor restarting control system based on a programmable controller is characterized in that: the LED power supply comprises a programmable controller (1), an LED display device (2), a high-power relay (3), a switching power supply (4), a voltage transmitter (5) and a current transmitter (6); the connection mode among each equipment is as follows: the output end of the switching power supply (4) is connected with a power supply terminal of the programmable controller (1), the output ends of the voltage transmitter (5) and the current transmitter (6) are respectively connected with an analog quantity acquisition terminal of the programmable controller (1), the outlet of the programmable controller (1) is connected with a coil of the high-power relay (3), and the display port of the programmable controller (1) is connected with the LED display device (2).
2. The low-voltage motor restarting control system based on programmable controller of claim 1 wherein: the output signals of the voltage transmitter (5) and the current transmitter (6) can adopt 4-20 mA or 0-5V.
3. The low-voltage motor restarting control system based on programmable controller of claim 1 wherein: the programmable controller (1) is provided with a communication interface which can adopt an RS485 interface or an RJ45 interface.
4. The low-voltage motor restarting control system based on programmable controller of claim 1 wherein: the LED display device (2) can display voltage and current real-time sampling values, the running state of the motor and the restarting action time of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346572.3U CN216016745U (en) | 2021-09-27 | 2021-09-27 | Low-voltage motor restart control system based on programmable controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122346572.3U CN216016745U (en) | 2021-09-27 | 2021-09-27 | Low-voltage motor restart control system based on programmable controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216016745U true CN216016745U (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122346572.3U Active CN216016745U (en) | 2021-09-27 | 2021-09-27 | Low-voltage motor restart control system based on programmable controller |
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|---|---|
| CN (1) | CN216016745U (en) |
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2021
- 2021-09-27 CN CN202122346572.3U patent/CN216016745U/en active Active
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