CN214177200U

CN214177200U - Low-voltage variable-frequency control cabinet

Info

Publication number: CN214177200U
Application number: CN202023232558.2U
Authority: CN
Inventors: 王潜
Original assignee: Anshan Junlong Automation Control System Co ltd
Current assignee: Anshan Junlong Automation Control System Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2021-09-10
Anticipated expiration: 2030-12-28

Abstract

The utility model relates to a low-voltage variable-frequency control cabinet, which comprises a controller, a frequency converter and a first breaker, and also comprises a power supply protection circuit, a sensor module and an upper computer, wherein the power supply protection circuit is connected into a power grid through a second breaker to supply power to the controller and the frequency converter, the controller is connected with the frequency converter, and the controller is connected with the sensor module; the power supply protection circuit comprises a power supply module, a brake resistor, a temperature control switch, a contactor, a second breaker, a third breaker, an incoming line reactor and a stabilized voltage supply, and the stability and the safety of the power supply are ensured; the utility model discloses a still realized the collection of accurate data, can real time monitoring valid data at the host computer end, transfer historical data at any time, effective analysis fault reason and control data improve failure analysis efficiency, the operation of effective control motor.

Description

Low-voltage variable-frequency control cabinet

Technical Field

The utility model relates to a low-voltage control cabinet especially relates to a low pressure variable frequency control cabinet.

Background

The variable frequency control cabinet is mainly used for adjusting the working frequency of equipment, reducing energy loss, stably starting the equipment and reducing the damage of large current generated when the equipment is directly started to a motor. Meanwhile, the device is provided with analog quantity input (for speed control or feedback signals), PID control, pump switching control (for constant pressure), a communication function, a macro function (different parameter settings aiming at different occasions), multi-speed and the like. The automatic control system can be widely applied to the automatic control of various occasions such as water supply, drainage, fire fighting, spraying pipe network pressurization, heating, ventilation, air conditioning, cold and hot water circulation and the like in industrial and agricultural production and various buildings.

Disclosure of Invention

The utility model provides a low-voltage variable frequency control cabinet, which fully protects the power supply of the control cabinet, has the energy consumption braking function and realizes the safety and stability of the power supply of the control cabinet; the sensor module of the motor is added to realize that the collected motor data is more accurate and easy to control; and the upper computer is connected with the control unit to realize the real-time monitoring of the variable frequency control cabinet.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a low pressure variable frequency control cabinet, includes controller, converter and circuit breaker one, still includes power protection circuit, sensor module and host computer, and power protection circuit passes through circuit breaker two and inserts the electric wire netting, gives controller and converter power supply, controller and converter both way communication, and sensor module is connected to the controller.

Further, the power protection circuit comprises a power module, a brake resistor, a temperature control switch, a contactor, a second circuit breaker, a third circuit breaker, an incoming line reactor and a stabilized voltage power supply, a power grid is connected into the second circuit breaker, the second circuit breaker is connected with the contactor in parallel and then connected with the incoming line reactor in series, then a three-phase power supply is connected into a bus voltage end of the power module, the power module is connected with the brake resistor and the temperature control switch in parallel respectively, and the output end of the stabilized voltage power supply is connected into 24V input of the power module.

Furthermore, the sensor module adopts a Siemens SMC30 sensor module, is connected with an encoder of the motor, transmits encoder data to the controller, and the controller is in two-way communication with the frequency converter.

Furthermore, the software installed on the upper computer is communicated with the controller through the Ethernet, so that the running state of the motor can be monitored on the upper computer in real time, the running curve of the motor can be checked, and historical data can be retrieved.

Compared with the prior art, the beneficial effects of the utility model are that:

1) the brake resistor is added to effectively perform energy consumption braking, and a voltage-stabilized power supply, an incoming line reactor and a temperature control switch are added to ensure safe and stable operation of the power supply module;

2) the sensor module is adopted to more accurately acquire the motor running data, so that more precise motor control is realized;

3) the upper computer is used for realizing real-time recording and monitoring of data, so that historical data can be conveniently called at any time, and fault reasons can be analyzed.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the power protection circuit of the present invention.

Fig. 3 is a block diagram of a sensor module.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

see fig. 1, which is a schematic structural diagram of the present invention. The utility model relates to a low pressure variable frequency control cabinet, including controller, converter and circuit breaker 1, still include power protection circuit, sensor module and host computer, power protection circuit passes through circuit breaker 2 and inserts the electric wire netting, gives controller and converter power supply, and the converter is connected to the controller, and sensor module is connected to the converter.

See fig. 2, the power protection circuit includes power module, brake resistance, temperature detect switch, contactor, circuit breaker 2, circuit breaker 3, inlet wire reactor and constant voltage power supply, and the electric wire netting inserts circuit breaker 2, and circuit breaker 2 connects in parallel with the contactor, and then establishes ties with the inlet wire reactor, then three phase current inserts the busbar voltage end of power module, and brake resistance and temperature detect switch are connected in parallel respectively again on the power module, insert the 24V input of power module with the output of constant voltage power supply.

As shown in fig. 3, the sensor module adopts a siemens SMC30 sensor module,

pins

1 and 2 of an X524 pin of an SMC30 sensor module are connected with a 24V power supply to supply power to the sensor module,

pins

1 and 2 of an X531 pin of an SMC30 sensor module are connected with a positive end and a negative end of a power supply line of an encoder to supply power to the encoder,

pins

1, 2, 3, 4, 5 and 6 of an X521 pin of an SMC30 sensor module are respectively connected with a positive end and a negative end of an a phase, a positive end and a negative end of a B phase and a positive end and a negative end of a C phase of the encoder to effectively transmit encoder data to a controller, the controller is in bidirectional communication with a frequency converter, the controller performs accurate calculation on motor operation data, and the frequency converter is connected with a motor.

The following examples are carried out on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

[ examples ] A method for producing a compound

As shown in fig. 1, a power protection circuit is connected to a power grid through a circuit breaker 2 to supply power to a controller and a frequency converter, the controller is connected with the frequency converter, the controller is connected with a sensor module, the frequency converter is connected with a field motor, and the operation data of the motor is acquired; as shown in fig. 3, the sensor module is connected to an encoder of the motor, so as to accurately monitor the operation condition of the motor, accurately calculate data through the controller, and control the frequency converter through the controller, so as to accurately control the motor; as shown in fig. 2, the power protection circuit includes a power module, a brake resistor, a temperature control switch, a contactor, a circuit breaker 2, a circuit breaker 3, an incoming line reactor and a regulated power supply, a three-phase power is connected into the circuit breaker 2, the circuit breaker 2 and the contactor are connected in series, the contactor is connected in series with the incoming line reactor, inrush current is suppressed through the incoming line reactor, a slope is limited, and the three-phase power terminal of the power module is connected; the power supply passes through the circuit breaker 3, the circuit breaker 3 is connected with a stabilized voltage power supply in series, and the output end of the stabilized voltage power supply is connected to the 24V input end of the power supply module to supply power to the 24V power supply of the power supply module; and finally, the brake resistor and the temperature control switch are connected to corresponding wiring terminals of the power module, the brake resistor realizes energy consumption braking, the temperature control switch gives an alarm when the power overload temperature is too high, the operation of the power module is protected in an all-dimensional manner, and a good guarantee is provided for a power supply system of the low-voltage frequency conversion cabinet.

Claims

1. The utility model provides a low pressure variable frequency control cabinet, includes controller, converter and circuit breaker one, its characterized in that still includes power protection circuit, sensor module and host computer, and power protection circuit inserts the electric wire netting through circuit breaker two, gives controller and converter power supply, controller and converter both way communication, and the sensor module is connected to the controller.

2. The low-voltage variable-frequency control cabinet according to claim 1, wherein the power protection circuit comprises a power module, a brake resistor, a temperature control switch, a contactor, a second circuit breaker, a third circuit breaker, an incoming line reactor and a stabilized voltage power supply, a power grid is connected into the second circuit breaker, the second circuit breaker is connected with the contactor in parallel and then connected with the incoming line reactor in series, then a three-phase power supply is connected into a bus voltage end of the power module, the power module is connected with the brake resistor and the temperature control switch in parallel respectively, and an output end of the stabilized voltage power supply is connected into a 24V input of the power module.

3. The low-voltage variable-frequency control cabinet according to claim 1, wherein the sensor module is a Siemens SMC30 sensor module, is connected with an encoder of a motor, and transmits encoder data to the controller.

4. The low-voltage variable-frequency control cabinet according to claim 1, wherein the upper computer communicates with the controller through Ethernet, so that the motor running state can be monitored in real time on the upper computer, a motor running curve can be checked, and historical data can be retrieved.