CN202889265U - Soft starter control system driving three-phase squirrel cage asynchronous motor to operate - Google Patents
Soft starter control system driving three-phase squirrel cage asynchronous motor to operate Download PDFInfo
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- CN202889265U CN202889265U CN 201220631111 CN201220631111U CN202889265U CN 202889265 U CN202889265 U CN 202889265U CN 201220631111 CN201220631111 CN 201220631111 CN 201220631111 U CN201220631111 U CN 201220631111U CN 202889265 U CN202889265 U CN 202889265U
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- asynchronous motor
- soft initiator
- soft
- cage asynchronous
- control system
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Abstract
The utility model discloses a soft starter control system driving a three-phase squirrel cage asynchronous motor to operate, and belongs to the electric field. The system provided by the utility model comprises a soft starter for controlling the three-phase squirrel cage asynchronous motor through soft start, and a main circuit part and a programmable logic controller respectively connected with the soft starter. Through above configuration, the system provided by the utility model overcomes the deficiency that the number of the required soft starters is increased because the existing soft starter just drives one motor each time and the cost is greatly increased. One soft starter can drive a plurality of motors at the same time, and the system is simple in connection, stable in performance and suitable for popularization and application.
Description
Technical field
The utility model relates to the motor soft starter control system based on programmable logic controller (PLC), specifically, relates to a kind of control system that realizes soft initiator one is dragged at least one motor start and stop by programmable logic controller (PLC).
Background technology
As everyone knows, starting current was large when squirrel cage asynchronous motor adopted directly startup, and start-up time is long.When power was larger, starting current was also very large, even was 5～8 times of rated current.Excessive starting current can produce larger pressure drop on the line, makes voltage ripple of power network very large, and impact is connected in parallel on the normal operation of other equipment on the electrical network.Simultaneously because detent torque is larger, load produced impact, will increase the wearing and tearing of drive disk assembly and reduce its useful life.So when the capacity of motor is larger, namely surpass power supply capacity 20%～30% the time adopt reduced-voltage starting.
Soft initiator also is a kind of of reduced voltage starter.It is utility advanced person's microprocessor, control in reasonable and orderly manner the conducting of high-power thyristor assembly, make it to produce the level and smooth alternating voltage that progressively increases and be added on the alternating current motor, motor is accelerated progressively by predefined mode and parameter, realize soft start.
Yet the soft start that adopts at present is that a soft initiator drags a motor mostly, every soft initiator is only controlled a motor like this, cause cost greatly to increase, if and the employing relay drags, namely allow to one drag two, and drag three, need to carry out mutual linking to control loop, control circuit also can become, and very complex and fault point increase, the Maintenance and Repair difficulty.
The utility model content
The purpose of this utility model is to overcome existing soft initiator and can only adopts the mode of one-to-one to cause demand soft initiator quantity to increase, greatly improved the defective of cost to motor, a kind of soft initiator control system that drags the governing type three phases squirrel-cage asynchronous motor operation is provided, make the soft initiator can the dragging multiple motor, overcome defects.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of soft initiator control system that drags the governing type three phases squirrel-cage asynchronous motor operation comprises the soft initiator of controlling this governing type three phases squirrel-cage asynchronous motor by soft start, and the main circuit section and the programmable logic controller (PLC) that link to each other with this soft initiator respectively.
In order to allow the soft initiator can the dragging multiple motor, described soft initiator quantity be one, and this soft initiator drags at least one governing type three phases squirrel-cage asynchronous motor, and the quantity of main circuit section equates with this governing type three phases squirrel-cage asynchronous motor.
Further, described main circuit section comprises main circuit breaker, main contactor, bypass contactor, current transformer, thermal relay and the indicator light that links to each other with soft initiator respectively.
In order better to realize disposing input module and output module on the described programmable logic controller (PLC) by the utility model.
Compared with prior art, the utlity model has following beneficial effect:
(1) the utility model is owing to the participation by programmable logic controller (PLC), be that a soft initiator can the dragging multiple three phase squirrel cage induction motor, simultaneously simple to operate, wiring is simple, do not need to carry out stable and reliable for performance and failure rate is low chain the time, Maintenance and Repair are convenient.
(2) the programmable logic controller (PLC) volume in the utility model is little, does not need too many annex and placement space, thereby it is so that the volume of control cubicle becomes less, and so not only conserve space is also saved the control cubicle cost simultaneously.
(3) the utility model soft initiator governing type three phases squirrel-cage asynchronous motor is carried out many drag in cooperation by contactor, circuit breaker etc.; realization is to all privacy protections of motor; prevent when control circuit goes wrong, its operation influences each other between the motor.
Description of drawings
Fig. 1 is the theory diagram of the utility model-embodiment.
Fig. 2 is the control module winding diagram of the utility model-embodiment.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment, and execution mode of the present utility model includes but not limited to the following example.
Embodiment
As depicted in figs. 1 and 2, motor soft starter control system based on programmable logic controller (PLC), comprise four motor 1#, 2#, 3#, 4#, the soft initiator of dragging motor, the main circuit section and the programmable logic controller (PLC) that links to each other with soft initiator that are subjected to the work of soft initiator control drive motor.Wherein main circuit section is by soft initiator, and main circuit breaker Q1, Q2, Q3, Q4 and the QF11, QF12, QF13, the QF14 that are attached thereto respectively, with four main contactor KM11, KM21, KM31, KM41, bypass contactor KM12, KM22, KM32, KM42, current transformer LH1, LH2, LH3, LH4, thermal relay FR1, FR2, FR3, FR4, indicator lights that motor is corresponding, wherein also be connected with input/output module on the programmable logic controller (PLC) respectively.
Wherein give cost consideration; this soft initiator is selected the NJR2D soft starter of domestic positive safe company; and programmable logic controller (PLC) is selected the miniature Logic control module LOGO of Siemens Company; it has flexibly and characteristics cheaply; the utility model adds a digital quantity input and output enlargement module at basic universal logic module; its concrete model is: 6ED1 052-1FB00-0BA6 and 6ED1 055-1FB00-0BA1; and also be connected with bypass contactor with main contactor on this input/output module; also be connected with simultaneously the close push button switch S B1 for Long-distance Control on this input/output module; SB2; SB3; SB4 and the close push button switch S B5 that stops for this locality; SB6; SB7; SB8; wherein thermal relay cooperates with the close push button switch, realizes safeguard protection and control.
In above-mentioned device, Programmable Logic Controller is as the control core of electric motor starting, be mainly used in controlling the soft start of motor, simultaneously, according to the on off state of external cabling, the start and stop of soft initiator are operated, and the contactor that links to each other with soft initiator in the control is carried out adhesive and opening operation, detect simultaneously the by-passing signal of soft initiator, and gather the fault-signal of soft initiator.The course of work of the present utility model is as follows:
The I1 of LOGO, I2, I3, I4 are that Local or Remote starts control inputs, I5 is the soft start fault-signal, I6 is soft start bypass run signal, Q1, Q2, Q3, Q4 are soft start output, I1 ' on the expansion module, I2 ', I3 ', I4 ' stop control inputs for local/remote, and Q1 ', Q2 ', Q3 ', Q4 ' are total head operation output.
When detecting, controller starts input signal I1, I2, I3, I4 any one when effective, the corresponding input signal I1 ' that stops, I2 ', I3 ', when I4 ' is invalid, enter this electric motor starting program: preferred input signal I1 is effective for the present embodiment, therefore correspondence stops input signal I1 ' when invalid, corresponding main contactor, be KM11, KM21, KM31, K11 adhesive among the KM41, the normally opened contact of main contactor is closed simultaneously, give soft initiator with enabling signal, and the by-passing signal of wait soft initiator, after LOGO monitors by-passing signal, control output makes corresponding loop bypass contactor KM12, KM22, KM32, KM12 among the KM42 is closed, main contactor and auxiliary contact thereof disconnect simultaneously, and controller is finished the click start-up routine, and motor enters the total head running status, otherwise work as monitoring control devices to stopping input signal I1 ', I2 ', I3 ', when the I1 ' among the I4 ' is effective, when if this motor is in running status, main contactor and auxiliary contact thereof disconnect, and motor stops.If starting to the whole process of not total head operation, controller detects certain fault, then enters immediately shut down procedure, and it is the contactor disconnection of closure, and motor stops.And behind other normal startup the electric motor loop of total head operation be not subjected to the impact of fault, will continue its running status of maintenance.
According to above-described embodiment, just can well realize the utility model.
Claims (4)
1. one kind drags the soft initiator control system that governing type three phases squirrel-cage asynchronous motor moves, it is characterized in that, comprise the soft initiator by soft start control governing type three phases squirrel-cage asynchronous motor, and the main circuit section and the programmable logic controller (PLC) that link to each other with this soft initiator respectively.
2. a kind of soft initiator control system that drags governing type three phases squirrel-cage asynchronous motor operation according to claim 1, it is characterized in that, described soft initiator quantity is one, and this soft initiator drags at least one governing type three phases squirrel-cage asynchronous motor, and the quantity of main circuit section equates with this governing type three phases squirrel-cage asynchronous motor.
3. a kind of soft initiator control system that drags governing type three phases squirrel-cage asynchronous motor operation according to claim 2, it is characterized in that, described main circuit section comprises main circuit breaker, main contactor, bypass contactor, current transformer, thermal relay and the indicator light that links to each other with soft initiator respectively.
4. a kind of soft initiator control system that drags the governing type three phases squirrel-cage asynchronous motor operation according to claim 3 is characterized in that, disposes input module and output module on the described programmable logic controller (PLC).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220631111 CN202889265U (en) | 2012-11-26 | 2012-11-26 | Soft starter control system driving three-phase squirrel cage asynchronous motor to operate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220631111 CN202889265U (en) | 2012-11-26 | 2012-11-26 | Soft starter control system driving three-phase squirrel cage asynchronous motor to operate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202889265U true CN202889265U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220631111 Expired - Lifetime CN202889265U (en) | 2012-11-26 | 2012-11-26 | Soft starter control system driving three-phase squirrel cage asynchronous motor to operate |
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| Country | Link |
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| CN (1) | CN202889265U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595306A (en) * | 2013-11-08 | 2014-02-19 | 安徽鑫龙电器股份有限公司 | Soft starter capable of controlling two motors and control method of soft starter |
| CN104796044A (en) * | 2015-04-28 | 2015-07-22 | 海南科技职业学院 | Method and system for flexibly starting multiple motors by frequency converter based on PLC (programmable logic controller) |
-
2012
- 2012-11-26 CN CN 201220631111 patent/CN202889265U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103595306A (en) * | 2013-11-08 | 2014-02-19 | 安徽鑫龙电器股份有限公司 | Soft starter capable of controlling two motors and control method of soft starter |
| CN104796044A (en) * | 2015-04-28 | 2015-07-22 | 海南科技职业学院 | Method and system for flexibly starting multiple motors by frequency converter based on PLC (programmable logic controller) |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |
|
| CX01 | Expiry of patent term |