CN212063867U

CN212063867U - Intelligent motor control cabinet

Info

Publication number: CN212063867U
Application number: CN202020880324.XU
Authority: CN
Inventors: 吕旭文; 乔磊; 温称; 李囡
Original assignee: Xi'an Hongshi Electromechanical Technology Co ltd
Current assignee: Xi'an Hongshi Electromechanical Technology Co ltd
Priority date: 2020-05-23
Filing date: 2020-05-23
Publication date: 2020-12-01
Anticipated expiration: 2030-05-23

Abstract

The utility model discloses an intelligent motor control cabinet, the intelligent cabinet temperature adjusting device comprises a cabinet body and a cabinet door, the cabinet body is articulated with the cabinet door, the internal fixedly connected with PLC programmable controller of cabinet, the internal portion of cabinet is equipped with the converter, the link of converter has a plurality of motor drive circuit that are equipped with through serial ports connection, and a plurality of motor drive circuit all connect in parallel on the main power supply, every all establish ties on the motor drive circuit has circuit control system, control system includes signal acquisition module and circuit control module. The utility model discloses an install additional current acquisition module, gather and show motor drive circuit's each phase current signal to in time make the early warning instruction, when monitoring motor current too high, shut down, power protection, and do alarm indication, provide accurate monitoring and timely effective control, can prevent that the system from taking place the short circuit, overflowing fault, effective protection system safety.

Description

Intelligent motor control cabinet

Technical Field

The utility model relates to a switch board field, concretely relates to intelligent motor control cabinet.

Background

Traditional intelligent motor control cabinet has protect function such as overload, short circuit, default phase protection, has the operating frequency of adjusting device, reduces energy loss. With its own analog input (for speed control or feedback signals), PID control, etc. The application of the intelligent motor control cabinet relates to the aspects of life, the industrial and civil fields of office automation, household appliances, process control and the like, and various intelligent motor control cabinets are not actively used. Accordingly, the development of drive control around the motor is rapidly developing, and various application products such as speed regulation systems, servo systems, frequency converters and the like are developed, so that the motor is widely applied to various industries.

At present, most of intelligent motor control cabinets in the market cannot monitor the motor current, and actually, when the motor runs above the rated current, the temperature of a coil rises, so that the insulation deterioration, the service life shortening or the coil burning loss are caused, and therefore, the load is reduced, and the intelligent motor control cabinet works below the rated current. Further, when the voltages between the phases of the three-phase motor are unbalanced, unbalanced currents are generated, the temperature rises unevenly, and local overheating occurs, and therefore, it is a function that is required at present to measure and record the current values of the respective phases periodically.

Therefore, it is necessary to invent an intelligent motor control cabinet to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an intelligence motor control cabinet, through the current acquisition module who installs additional, gather and show motor drive circuit's each phase current signal to in time make the early warning instruction, when monitoring motor current too high, shut down, power protection, and do alarm indication, provide accurate monitoring and timely effective control, with the above-mentioned weak point in the solution technique.

In order to achieve the above object, the present invention provides the following technical solutions: the utility model provides an intelligent motor control cabinet, includes the cabinet body and cabinet door, the cabinet body is articulated with the cabinet door, the internal fixedly connected with PLC programmable controller of cabinet, the internal portion of cabinet is equipped with the converter, the link of converter has a plurality of motor drive circuit that are equipped with through serial ports connection, and a plurality of motor drive circuit all connect in parallel on the main power, every all establish ties on the motor drive circuit has circuit control system, control system includes signal acquisition module and circuit control module, signal acquisition module includes the current acquisition module that is used for motor drive circuit to monitor, circuit control module comprises moulded case circuit breaker, minirelay, thermorelay and alarm module, moulded case circuit breaker, minirelay and thermorelay all set up in the internal portion of cabinet, alarm module sets up in the cabinet door outside, moulded case circuit breaker, minirelay and alarm module, The miniature relay and the thermal relay are connected in series on a motor driving circuit, and a contactor is further arranged on the motor driving circuit;

an HMI (human machine interface) is mounted on the surface of the cabinet door and connected with a PLC (programmable logic controller) through an RS (remote sensing) interface, a plurality of contact connecting switches, manual adjusting branch switches and a main switch which are uniformly distributed are arranged on the outer side of the cabinet door, the contact connecting switches are electrically connected with a contactor, the manual adjusting branch switches are connected with a motor driving circuit in series, and the main switch is connected with a main power supply in series;

the input end of the PLC is provided with an A/D converter, the output end of the PLC is provided with a D/A converter, the current acquisition module is electrically connected with the A/D converter, and the molded case circuit breaker, the thermal relay, the miniature relay and the alarm module are all electrically connected with the D/A converter.

Preferably, the current collection module is configured as a current transformer, a primary side of the current transformer is connected in parallel to the primary system, and a secondary side of the current transformer is connected in parallel to the secondary system.

Preferably, the primary system is a motor driving circuit, and the secondary system comprises a measuring instrument, a relay protection measuring device and a controller.

Preferably, the alarm module includes alarm lamp and alarm, the alarm lamp comprises trouble lamp and pilot lamp, warning when trouble lamp and alarm are used for motor drive circuit trouble to take place, the pilot lamp is used for definitely indicating trouble motor drive circuit.

Preferably, the number of pilot lamp sets up to a plurality ofly, and is a plurality of the pilot lamp respectively with a plurality of motor drive circuit phase-matchs, the number of manual regulation branch switch sets up to a plurality ofly, and is a plurality of manual regulation branch switch and a plurality of motor drive circuit phase-matchs.

Preferably, the cabinet body is fixedly connected with a temperature sensor, and the temperature sensor is electrically connected with the A/D converter.

Preferably, one side of the cabinet door, which is far away from the hinge point, is provided with a buckling door lock, and the cabinet body is connected with the cabinet door through the buckling door lock in a locking manner.

In the technical scheme, the utility model provides a technological effect and advantage:

through the current acquisition module who installs additional, gather and show motor drive circuit's each phase current signal to in time make early warning instruction, monitor when motor current is too high, shut down, power protection, and do the warning instruction, provide accurate monitoring and timely effective control, can prevent that the system from taking place the short circuit, overflowing the trouble, compare with prior art, this technical scheme can effectively protect system safety.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the internal structure of the cabinet body of the present invention;

fig. 3 is a flow chart of the system control of the present invention.

Description of reference numerals:

the intelligent cabinet temperature controller comprises a cabinet body 1, a cabinet door 2, a PLC 3, a frequency converter 4, a current acquisition module 5, a molded case circuit breaker 6, a miniature relay 7, a thermal relay 8, an alarm module 9, an alarm lamp 91, an alarm 92, a contactor 10, an HMI (human machine interface) 11, a contact connecting switch 12, a manual adjusting branch switch 13, a main switch 14 and a temperature sensor 15.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings.

The utility model provides an intelligent motor control cabinet as shown in figures 1-3, which comprises a cabinet body 1 and a cabinet door 2, wherein the cabinet body 1 is hinged with the cabinet door 2, a PLC programmable controller 3 is fixedly connected in the cabinet body 1, a frequency converter 4 is arranged in the cabinet body 1, the connecting end of the frequency converter 4 is connected with a plurality of motor driving circuits through serial ports, the motor driving circuits are all connected in parallel on a main power supply, a circuit control system is connected in series on each motor driving circuit, the control system comprises a signal acquisition module and a circuit control module, the signal acquisition module comprises a current acquisition module 5 for monitoring the motor driving circuits, the circuit control module comprises a plastic shell breaker 6, a miniature relay 7, a thermal relay 8 and an alarm module 9, the plastic shell breaker 6, the miniature relay 7 and the thermal relay 8 are all arranged in the cabinet body 1, the alarm module 9 is arranged on the outer side of the cabinet door 2, the molded case circuit breaker 6, the miniature relay 7 and the thermal relay 8 are all connected in series on a motor driving circuit, and a contactor 10 is further arranged on the motor driving circuit;

an HMI (human machine interface) 11 is mounted on the surface of the cabinet door 2, the HMI 11 is connected with the PLC 3 through an RS485 interface, a plurality of contact connecting switches 12, manual adjusting branch switches 13 and a main switch 14 which are uniformly distributed are arranged on the outer side of the cabinet door 2, the contact connecting switches 12 are electrically connected with the contactor 10, the manual adjusting branch switches 13 are connected with a motor driving circuit in series, and the main switch 14 is connected with a main power supply in series;

the input end of the PLC 3 is provided with an A/D converter, the output end of the PLC 3 is provided with a D/A converter, the current collection module 5 is electrically connected with the A/D converter, and the molded case circuit breaker 6, the thermal relay 8, the miniature relay 7 and the alarm module 9 are all electrically connected with the D/A converter.

Further, in the above technical solution, the current collecting module 5 is configured as a current transformer, and a primary side of the current transformer is connected in parallel to the primary system, and a secondary side of the current transformer is connected in parallel to the secondary system.

Further, in the above technical solution, the primary system is a motor driving circuit, and the secondary system includes a measuring instrument, a relay protection measuring device, and a controller.

Further, in the above technical solution, the alarm module 9 includes an alarm lamp 91 and an alarm 92, the alarm lamp is composed of a fault lamp and an indicator lamp, the fault lamp and the alarm 92 are used for alarming when a fault occurs in the motor driving circuit, and the indicator lamp is used for explicitly indicating the fault motor driving circuit.

Further, in above-mentioned technical scheme, the quantity of pilot lamp sets up to a plurality ofly, and is a plurality of the pilot lamp respectively with a plurality of motor drive circuit phase-matchs, the quantity of manual regulation branch switch 13 sets up to a plurality of, and is a plurality of manual regulation branch switch 13 and a plurality of motor drive circuit phase-matchs, after detecting local motor drive circuit trouble and taking place, the pilot lamp that this motor drive circuit connects is luminous, and the trouble lamp scintillation, reminds personnel to break off appointed motor drive circuit through manual regulation branch switch 13.

Further, in above-mentioned technical scheme, the internal fixedly connected with temperature sensor 15 of cabinet 1, temperature sensor 15 and AD converter electric connection, through the internal temperature of temperature sensor 15 sensing cabinet to with the analysis and processing of temperature information transmission PLC programmable controller 3, when the high temperature reaches the early warning setting value, PLC programmable controller 3 control alarm lamp 91 and alarm 92 warn, simultaneously through the disconnected motor drive circuit of thermal relay 8.

Further, in the above technical scheme, one side of the cabinet door 2 far away from the hinge point is provided with a lock door lock, the cabinet body 1 is connected with the cabinet door 2 through the lock door lock, the cabinet door 2 is closed under the working state, the circuit is safe and closed, and the safety is improved.

The implementation mode is specifically as follows: in the practical use of the intelligent motor control cabinet, a current transformer is added as a current acquisition module 5 to monitor the current signal of a motor driving circuit in real time and convert the monitoring signal into a voltage signal, then the voltage signal is processed and converted and is input into an A/D converter of a PLC (programmable logic controller) 3 to fulfill the aim of detection, because the voltage on a primary side circuit is higher, if direct measurement is very dangerous, the current transformer has the functions of current transformation and electrical isolation, converts high current into low current in proportion, monitors a main current signal of a motor circuit, ensures that the PLC 3 gives out an exact control signal to realize current closed-loop control and ensure the quick starting performance of the motor, and in order to ensure the faults of short circuit, overcurrent and the like in the actual operation of the motor, the fault information can be accurately fed back to the PLC 3 in time, the HMI human-computer interface 11 reads the relevant parameters of the motor current of the current transformer in a communication mode to facilitate the identification of a user, when the monitored motor current is higher than an early warning set value, the PLC 3 controls the alarm module 9 to make an early warning indication to prompt the overlarge motor current and abnormal cable temperature and to prompt an operator, when the monitored motor current is higher than the early warning set value, the manual adjustment branch switch 13 or the main switch 14 is manually closed and the conditions of each component and cable in the motor and the cabinet body 1 are overhauled, when the monitored motor current is higher than a shutdown set value, the PLC 3 makes an alarm indication and automatically shuts down to prompt the operator to immediately check the conditions of each component and cable in the motor and the control cabinet, the accurate current monitoring plays a key role in a motor driving control system and can prevent the system from short circuit, Overcurrent fault, effective protection system safety, this embodiment specifically solved the intelligent motor control cabinet local heating that exists among the prior art and damaged can not lead to the impaired problem of overall circuit from the self-checking.

This practical theory of operation:

referring to the attached drawings 1-3 of the specification, a current acquisition module 5 monitors a current signal of a motor driving circuit in real time, converts the monitoring signal into a voltage signal, processes and converts the voltage signal, inputs the voltage signal into an A/D converter of a PLC (programmable logic controller) 3, a current transformer converts high current into low current in proportion, monitors a main current signal of a motor circuit, and enables the PLC 3 to give an exact control signal which gives a control signal to turn off a switch in time so that a hardware is protected, when the monitored motor current is higher than an early warning set value, the PLC 3 controls an alarm module 9 to give an early warning indication to prompt that the motor current is too large and the temperature of a cable is abnormal, thereby prompting an operator to manually close a manual adjustment branch switch 13 or a main switch 14 and overhaul the motor and various components and cables in a cabinet body 1, when the monitored motor current is higher than a stop set value, an alarm indication is made, the motor is automatically stopped, and an operator is reminded to immediately check the conditions of all components and cables in the motor and the control cabinet.

While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.

Claims

1. The utility model provides an intelligence motor control cabinet, includes the cabinet body (1) and cabinet door (2), the cabinet body (1) is articulated with cabinet door (2), its characterized in that: the intelligent cabinet is characterized in that a PLC (programmable logic controller) (3) is fixedly connected inside the cabinet body (1), a frequency converter (4) is arranged inside the cabinet body (1), the connecting end of the frequency converter (4) is connected with a plurality of motor driving circuits through serial ports, the motor driving circuits are all connected in parallel on a main power supply, each motor driving circuit is connected with a circuit control system in series, the control system comprises a signal acquisition module and a circuit control module, the signal acquisition module comprises a current acquisition module (5) for monitoring the motor driving circuits, the circuit control module comprises a molded case circuit breaker (6), a miniature relay (7), a thermal relay (8) and an alarm module (9), the molded case circuit breaker (6), the miniature relay (7) and the thermal relay (8) are all arranged inside the cabinet body (1), and the alarm module (9) is arranged outside the cabinet door (2), the molded case circuit breaker (6), the miniature relay (7) and the thermal relay (8) are all connected in series on a motor driving circuit, and a contactor (10) is further arranged on the motor driving circuit;

an HMI (human machine interface) is mounted on the surface of the cabinet door (2), the HMI (human machine interface) is connected with the PLC (programmable logic controller) 3 through an RS485 interface, a plurality of contact connecting switches (12), manual adjusting branch switches (13) and a main switch (14) which are uniformly distributed are arranged on the outer side of the cabinet door (2), the contact connecting switches (12) are electrically connected with the contactor (10), the manual adjusting branch switches (13) are connected with a motor driving circuit in series, and the main switch (14) is connected with a main power supply in series;

the input end of the PLC (3) is provided with an A/D converter, the output end of the PLC (3) is provided with a D/A converter, the current collection module (5) is electrically connected with the A/D converter, and the molded case circuit breaker (6), the thermal relay (8), the miniature relay (7) and the alarm module (9) are all electrically connected with the D/A converter.

2. The intelligent motor control cabinet of claim 1, wherein: the current acquisition module (5) is set as a current transformer, the primary side of the current transformer is connected in parallel to the primary system, and the secondary side of the current transformer is connected in parallel to the secondary system.

3. The intelligent motor control cabinet of claim 2, wherein: the primary system is a motor driving circuit, and the secondary system comprises a measuring instrument, a relay protection measuring device and a controller.

4. The intelligent motor control cabinet of claim 1, wherein: alarm module (9) include alarm lamp (91) and alarm (92), the alarm lamp comprises trouble lamp and pilot lamp, warning when trouble lamp and alarm (92) are used for motor drive circuit trouble to take place, the pilot lamp is used for definitely indicating trouble motor drive circuit.

5. The intelligent motor control cabinet of claim 4, wherein: the quantity of pilot lamp sets up to a plurality ofly, and is a plurality of the pilot lamp respectively with a plurality of motor drive circuit phase-matchs, the quantity of manual regulation branch switch (13) sets up to a plurality ofly, and is a plurality of manual regulation branch switch (13) and a plurality of motor drive circuit phase-matchs.

6. The intelligent motor control cabinet of claim 1, wherein: the cabinet body (1) is internally and fixedly connected with a temperature sensor (15), and the temperature sensor (15) is electrically connected with the A/D converter.

7. The intelligent motor control cabinet of claim 1, wherein: one side of the cabinet door (2) far away from the hinged point is provided with a buckling door lock, and the cabinet body (1) is connected with the cabinet door (2) through the buckling door lock in a locking mode.