CN104773465A - Large-scale transmission master-slave control equipment of belt conveyer and operation method thereof - Google Patents

Large-scale transmission master-slave control equipment of belt conveyer and operation method thereof Download PDF

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Publication number
CN104773465A
CN104773465A CN201410015660.7A CN201410015660A CN104773465A CN 104773465 A CN104773465 A CN 104773465A CN 201410015660 A CN201410015660 A CN 201410015660A CN 104773465 A CN104773465 A CN 104773465A
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frequency converter
plc
belt conveyor
motor
signal
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CN104773465B (en
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郭建军
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Science And Technology Ltd Of Hui Tuoxin Nation Of Shenzhen
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Science And Technology Ltd Of Hui Tuoxin Nation Of Shenzhen
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/02Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/04Control devices, e.g. for safety, warning or fault-correcting detecting slip between driving element and load-carrier, e.g. for interrupting the drive
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65GTRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/06Control devices, e.g. for safety, warning or fault-correcting interrupting the drive in case of driving element breakage; Braking or stopping loose load-carriers

Abstract

The invention relates to material conveying equipment of industrial and mining enterprises, in particular to large-scale transmission master-slave control equipment of a belt conveyer and an operation method of the equipment. The equipment comprises multiple alternating-current asynchronism motors, a conveying belt synchronously driven by the multiple alternating-current asynchronism motors, and frequency converters used for driving all the alternating-current asynchronism motors and having the same number of the alternating-current asynchronism motors, wherein one of the frequency converters is a main frequency converter; power supply input ends of all the frequency converters are connected with a power grid, and power supply output ends are connected with stator input ends of the corresponding alternating-current asynchronism motors; the alternating-current asynchronism motor connected with the main frequency converter is rigidly connected with motor shafts of the alternating-current asynchronism motors connected with the slave frequency converters; the alternating-current asynchronism motors connected with the slave frequency converters output power by constant torque; the alternating-current asynchronism motor connected with the main frequency converter is flexibly connected with the alternating-current asynchronism motors connected with the slave frequency converters; and the slave frequency converters adopts a speed control mode.

Description

A kind of band conveyor large-scale transmission master & slave control equipment and operating method thereof
 
Technical field
The present invention relates to industrial and mining enterprises' material transfer equipment, relate to the operating method of a kind of band conveyor large-scale transmission master & slave control equipment and this equipment specifically.
Background technology
In the industrial and mining enterprises such as mine, metallurgy, coal, the conveying of material is very important process procedure, wherein band conveyor is main load transfer device, when the inventory be transferred is larger, there will be the type of drive that multiple electric motors drives same belt feeder.
Along with raising and the production-scale expansion of industrial production automation degree, length and the transmission power of various production travel line constantly increase, (200 are generally greater than m) when travel line length is increased to a certain degree, adopt single motor to drive and be just difficult to meet the requirement of producing, multi-drive synchronization type of drive must be adopted.In multi motor synchronous driving system, particularly exist between each driving motor in the system of certain physical connection, facts have proved, conventional negative feedback control scheme can not be adopted.Because conventional negative feedback control is based upon on bias adjustment basis, when control object departs from given value (as increased), change controlling quantity (reduction controlling quantity) by feedback regulation, control object is returned in given range.And in multi-drive synchronization speed governing system, owing to there is serious coupling between each synchronous dynamo, departing from of a certain driving motor rotating speed is caused by the load variations of this motor often, closely related with the rotating speed of other motor on transmission line, if at this moment feedback method applies to regulate to this motor routinely, by causing the offspeed of this motor more serious, finally cause whole driving system cisco unity malfunction.Thus to multi motor synchronous driving system, the high precision velocity synchronous variable-speed how realizing driving motor controls to be an important topic with engineering significance anxious to be resolved.
The synchro control that multistage individual motor drives is comparatively simple, control system problem to be solved is the requirement according to production technology, determines the synchronous speed of drive motor at different levels, form independently speed definite value closed loop control system, or velocity ratio closed loop control system.The former is applicable to constant speed multiple drive power and controls, and the latter is applicable to differential multiple drive power and controls.
At present, most industry enterprise produces remote, high-power transmission line all adopt ac variable frequency speed regulation mode.After forming multistage synchronous driving system, two classes can be divided into: a class is separate between each motor viewed from the annexation between drive motor, physical connection is there is not between motor, multipolar dynamo is adopted synchronously to drive the needs of mainly production technology or power, as the conticaster of steel mill, mill all belong to this homochronousness and drive; Another kind of is that each drive motor relies on chain type conveyor line and flexibly connects, and the mode of operation of each motor has and influences each other, and there is serious coupling each other.
In individual motor synchronous driving system, the velocity magnitude of each motor, payload are all relatively independent, can not produce coupling, the control law of each closed loop middle controller and controling parameters also routinely single closed speed control system consider.But as multistage synchronous drive control system, it is only surely not the simple combination of multiple single close loop control circuit.The feedback rotating speed that control system tackles different motor carries out Simultaneous Monitoring, and compensates control for the speed discrepancy determination synchroballistic amount existed.
In real system, first synchronous compensator can allow speed discrepancy determination synchronous working band according to the technique of multiple stage drive motor, when the speed discrepancy of different motor drops in work strip, think that system is normal synchronized, otherwise carry out synchroballistic adjustment, system serious asynchronous time also should control motor and stop and send warning.
In prior art, because Belt Conveying mass flow is large, Belt Conveying distance, large-scale belt feeder length can reach several kilometers even tens kilometers, and material windrow, belt feeder fault etc. can occur.When equipment breaks down, if do not have the motor of timely arrestment to run, can cause the paralysis of equipment, serious meeting causes the large area of equipment to be keeped in repair, and this just brings sizable service work and daily attention burden to manufacturing enterprise.
By the deficiency that above-mentioned buddhist is stated, active demand one can belt protection equipment, when belt feeder et out of order, stops motor in time.
Summary of the invention
For the deficiency in above-mentioned technology, the invention provides a kind of band conveyor large-scale transmission master & slave control equipment and operating method thereof.
For solving the problems of the technologies described above, the present invention is realized by following scheme: a kind of belt conveyor conveyer large-scale transmission master & slave control equipment, this equipment comprises multiple AC induction motor, by the synchronously driven belt conveyor of some AC induction motor, also comprise and drive each AC induction motor, the frequency converter equal with AC induction motor quantity, wherein a frequency converter is primary transducer, the power input of each frequency converter is connected with electrical network, and power output end is connected with the stator input of corresponding AC asynchronous motor; The motor shaft of the described AC induction motor be connected with primary transducer and the AC induction motor be connected with from frequency converter is rigidly connected, and the AC induction motor be connected with from frequency converter is with constant moment of force outputting power; The employing of the described AC induction motor be connected with primary transducer and the AC induction motor be connected with from frequency converter flexibly connects, and adopts speed control mode from machine; Equipment is respectively equipped with the inductor of the inductor detecting motor speed, the inductor detecting belt conveyor delivery speed, detection reductor oil temperature inductor, detection bowl temperature.
Further, described primary transducer with adopt optical fiber link to carry out connecting communication from frequency converter.
Further, above-mentioned any frequency converter is convertible into primary transducer, by completing freely switching between speeds control and direct torque from a digital input end of machine or communication modes.
Further, be rigidly connected described in and at least comprise the one that gear connects, chain connects.
An operating method for belt conveyor conveyer large-scale transmission master & slave control equipment, the method comprises the following steps:
1), primary transducer starting up, primary transducer optimum configurations is complete, PLC programming and after human-machine interface configuration completes, by PROFIBUS network by download program to PLC, converter parameter is downloaded to frequency converter;
2), before running each frequency converter, for the first time, each frequency converter carries out the Static and dynamic identification of motor, and speed link can be finely tuned in real-world operation;
3), before system starts, PLC primary transducer checks that whether all protectors are normal, is first detected the various signals of belt conveyor machine by each sensor, from the status signal of frequency converter, the permission actuation signal of front and back connecting conveyor belt, these information are all input to PLC inside;
4), after all devices is ready, start belt conveyor, PLC primary transducer sends operation restricted speed signal, belt conveyor extensions alarm light is glimmered 10 seconds, PLC primary transducer first starter motor cooling fan after terminating, reductor cooling fan, start releasing of brake band-type brake, feed back to one when drg reaches and reach a signal to PLC, must be that three drgs all unclamp and put in place, now PLC starts each frequency converter, given frequency is inputted at touch-screen, frequency converter presses the given run signal output frequency of PLC, control motor by given serpentine curve soft start,
5), at the uniform velocity rise under the pick-up time of setting from frequency converter, belt conveyor starts complete when reaching command speed, PLC detects line speed and drum speed in real time by inductor, when the two speed difference exceedes specified value, sudden stop, and send skidding alerting signal;
6), when stopping, first slow down and stop from frequency converter, confirm all to shut down from frequency conversion feedback signal, detect when line speed reduces to 0 and start drg, wrap dead motor shaft, stop complete;
7), after belt conveyor normally starts, PLC detects state, the electric current/torque of AC induction motor, reductor oil temperature, the bowl temperature of each protector of belt conveyor in real time.
Further, also comprise emergency protection, concrete protected mode is as follows:
1), when there being emergency episode artificially to trigger the anxious stopping time, PLC is anxious stops all frequency converters, and drg action locking immediately motor shaft implements stopping-down, stops in the fastest mode, is reduced to minimum by accident infringement;
2), all temperature exceed high PLC in limited time and only send alerting signal and do not shut down, and touch-screen can display alarm, temperature continue to be increased beyond high in limited time, PLC sends breakdown signal and orderly shutdown;
3), there is belt conveyor sideslip alarm, when continuous 10 seconds, will fault be reported and orderly shutdown;
4) fault will be reported and orderly shutdown when, there is coal piling, smog, skidding;
5) when, brake malfunctions reaches dropout, frequency converter stops anxious.
6), under multiple stage frequency converter linkage status wherein a frequency converter et out of order time sudden stop, to ensure not damage other frequency converter;
7), brake when line speed reduces to 0 is detected;
8), when downstream conveyor machine malfunction shutdown, will fault be reported and orderly shutdown, prevent windrow accident.
Further, in step 3), signal at least includes dragline emergency stop switches, smoke signal, coal piling signal, indulges and tear signal, offset signals, frequency converter ready signal, cascading conveyors startup interlocking signals.
The invention has the beneficial effects as follows: the present invention is according to the load properties of multistage synchronous driving system, the control of the multistage synchronous driving system of different structure is studied, particularly use intelligent control method, implement speed sync by PLC frequency converter to the driving motor in synchronous driving system to compensate and Load balanced control, reach high-precision synchronous variable-speed.Also to configure etc. with the principal and subordinate of programmable controller simultaneously and synchronous variable-speed control is carried out to different many motors actual transmission line, achieve good effect.The present invention is applied to band conveyor multiple electric motors and controls, and frequency converter uses Siemens low voltage frequency converter G150 and medium voltage frequency converter GM150 and Li Dehuafu frequency converter, and PLC adopts S7-300, and communication adopts PROFIBUS fieldbus.Motor can use 1,2,3, even multiple stage, as required flexible expansion, ensures that multiple electric motors runs by same speed sync, and outgoing current mean allocation, load balancing, to reach energy-conservation object.
The software that 1.PLC frequency converter is installed is fully integrated, under SIMATIC Manager platform, be integrated with PLC, man-machine interface and frequency converter.
2. the software that PLC frequency converter of the present invention is installed can run under several operation systems.
3. provide various software instrument, type selecting, programming configuration, debugging, energy saving calculation.
4. multiple control modes-V/F curve, closed-loop vector, closed-loop speed, closed loop torque.
5. multiple electric motors synchro control, makes equipment more operate steadily, reliable, energy-conservation.
6. perfect belt monitoring and protection system.
7. Chinese Man-machine Interface, display is abundant directly perceived, easy to operate.
Accompanying drawing explanation
Fig. 1 is that the present invention follows the torque Setting signal schematic diagram of main frame from machine.
Fig. 2 is that the present invention follows the speed preset signal schematic representation of main frame from machine.
Fig. 3 runs schematic diagram after the embodiment of the present invention 3 motors are connected with frequency converter.
Fig. 4 is the conticaster synchronous control system block diagram in the embodiment of the present invention 3.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is elaborated.
Master/slave function is many transmission application and designing, and wherein system is by multiple transducer drive, and motor shaft 4 is intercoupled together by gear, chain or belt conveyor 5 etc. simultaneously.Due to this master/slave controlling functions, load can be distributed between each gear unit uniformly.Generally, main frame is typical speeds control, and other gear unit follows torque or the speed preset of main frame.
Embodiment 1: a kind of belt conveyor conveyer large-scale transmission master & slave control equipment, this equipment comprises multiple AC induction motor 3, by the synchronously driven belt conveyor of some AC induction motor 3, also comprise and drive each AC induction motor 3, the frequency converter equal with AC induction motor 3 quantity, wherein a frequency converter is primary transducer 1, the power input of each frequency converter is connected with electrical network, and power output end is connected with the stator input of corresponding AC asynchronous motor 3; When the motor shaft of the described AC induction motor be connected with primary transducer 1 and the AC induction motor be connected with from frequency converter 2 is rigidly connected, the AC induction motor be connected with from frequency converter with constant moment of force outputting power, to make there is not speed difference (as shown in Figure 1) between gear unit.The employing of the described AC induction motor be connected with primary transducer 1 and the AC induction motor be connected with from frequency converter 2 flexibly connects, and the AC induction motor controlling to be attached thereto from frequency converter 2 adopts speed control mode (as shown in Figure 2); Equipment is respectively equipped with the inductor detecting motor speed, the inductor detecting belt conveyor delivery speed, the inductor that detects reductor oil temperature inductor, detect bowl temperature, described primary transducer with adopt optical fiber link to carry out connecting communication from frequency converter.
Above-mentioned any frequency converter is convertible into primary transducer, by completing freely switching between speeds control and direct torque from a digital input end of machine or communication modes.Frequency conversion equipment completes master-slave communication function automatically: as ACS800, ACS1000 of ABB and the 6SE71 series of Siemens, and this type of connects the general optical fiber link that adopts and carries out communication, and feature is that speed is fast, and precision is high, response is timely.Frequency conversion equipment completes the master & slave control to equipment by control PLC, adopts Field Bus Control Technology.As GM150, Luo Binkang series, G150 etc. of Siemens, feature is that mode is flexible, can realize a lot of senior controlling functions by PLC programming.
Embodiment 2: as shown in Figure 3, the operating method of a kind of belt conveyor conveyer large-scale transmission master & slave control equipment, the method comprises the following steps:
1), primary transducer starting up, primary transducer optimum configurations is complete, PLC programming and after human-machine interface configuration completes, by PROFIBUS network by download program to PLC, converter parameter is downloaded to frequency converter;
2), before running each frequency converter, for the first time, each frequency converter carries out the Static and dynamic identification of motor, and speed link can be finely tuned in real-world operation;
3), before system starts, PLC primary transducer checks that whether all protectors are normal, is first detected the various signals of belt conveyor machine by each sensor, from the status signal of frequency converter, the permission actuation signal of front and back connecting conveyor belt, these information are all input to PLC inside;
4), after all devices is ready, start belt conveyor, PLC primary transducer sends operation restricted speed signal, belt conveyor extensions alarm light is glimmered 10 seconds, PLC primary transducer first starter motor cooling fan after terminating, reductor cooling fan, start releasing of brake band-type brake, feed back to one when drg reaches and reach a signal to PLC, must be that three drgs all unclamp and put in place, now PLC starts each frequency converter, given frequency is inputted at touch-screen, frequency converter presses the given run signal output frequency of PLC, control motor by given serpentine curve soft start,
5), at the uniform velocity rise under the pick-up time of setting from frequency converter, belt conveyor starts complete when reaching command speed, PLC detects line speed and drum speed in real time by inductor, when the two speed difference exceedes specified value, sudden stop, and send skidding alerting signal;
6), when stopping, first slow down and stop from frequency converter, confirm all to shut down from frequency conversion feedback signal, detect when line speed reduces to 0 and start drg, wrap dead motor shaft, stop complete;
7), after belt conveyor normally starts, PLC detects state, the electric current/torque of AC induction motor, reductor oil temperature, the bowl temperature of each protector of belt conveyor in real time.
From Fig. 3, we can see, 1# and 2# is mechanically coaxially bound up, so the actual speed of these 2 motors is definitely identical; And 1# and 3# just likely also exists a little velocity deviation.
For these 3 motors of belt feeder, optimal state is that the outgoing current of 3 motors is identical, suitable converter parameter and PLC control program can be adopted to come close to this target, 3 frequency converters adopt PROFIBUS-DP mode, and communications protocol adopts 6/6 PZD word to carry out read-write communication.
Converter parameter method to set up is as follows:
Under SIMATIC Manager, insert 3 frequency converters.3 drivings device are carried out configuration, and wherein will be set to main transmission equipment by 1#, be pure direct torque mode with its coaxial 2# connect, 3# is the mode that speeds control adds moment amplitude limit.In Speed Setting link, add 1 secondary setup 2%, object allows the Speed Setting of 3# 1Hz faster than 1# main frame.
If synchronous speed allows bandwidth of operation to be $ ng, be respectively n 1 (k), n 2 (k) at the actual feedback rotating speed of k moment Dual Drive motor,
The process speed ratio that different motor requires is K n=N 1 N 2 (N 1, N 2 are respectively two motor speed given values), to definite value speed system K n=1, two motors asynchronous stop report to the police maximum speed discrepancy be $ nm ax, then when:
N 1 (k)-K n n 2 (k)≤$ ng, system synchronization is normal, does not carry out synchroballistic adjustment;
N 1 (k)-K n n 2 (k) >=$ nm ax, system is seriously asynchronous, stops and reports to the police;
$ ng < n 1 (k)-K n n 2 (k) < $ nm ax, calculates synchroballistic amount, implements synchroballistic and controls.
Synchroballistic controlling quantity u n j (k) of 2 motors is:
u n j (k) = k j [ a j (k) + bj (k) ] ? n 1 (k) - K n n 2 (k) ?( j = 1, 2) ;
(1) in formula, the synchronous speed compensatory control that u n j (k) is a jth motor exports, and a j (k), bj (k), k j are that a jth motor compensating calculates variable.Wherein k j is determined by site technique, and a j (k), bj (k) are provided by following formula:
a j (k) = - S i n g [ n j (k) - n gj- $ ng ]bj (k) = S i n g [ n gj- n j (k) - $ ng ];
(2) in formula, ngj is speed preset value, to its value of different motor is:
Ngj=N 1 j=1N 1 K n j=2 (3) symbolic function is defined as S i n g [x]=+ 1 x >=0-1 x < 0;
Finally obtain output u j (k)=u dj (k)+u n j (k) (j=1,2) of synchronous controller;
(4) u dj (k) in formula---a jth motor list closed-loop speed regulating control controls to export;
U n j (k)---a jth motor compensating controlling quantity.
Emergency protection of the present invention, concrete protected mode is as follows:
1), when there being emergency episode artificially to trigger the anxious stopping time, PLC is anxious stops all frequency converters, and drg action locking immediately motor shaft implements stopping-down, stops in the fastest mode, is reduced to minimum by accident infringement;
2), all temperature exceed high PLC in limited time and only send alerting signal and do not shut down, and touch-screen can display alarm, temperature continue to be increased beyond high in limited time, PLC sends breakdown signal and orderly shutdown;
3), there is belt conveyor sideslip alarm, when continuous 10 seconds, will fault be reported and orderly shutdown;
4) fault will be reported and orderly shutdown when, there is coal piling, smog, skidding;
5) when, brake malfunctions reaches dropout, frequency converter stops anxious.
6), under multiple stage frequency converter linkage status wherein a frequency converter et out of order time sudden stop, to ensure not damage other frequency converter;
7), brake when line speed reduces to 0 is detected;
8), when downstream conveyor machine malfunction shutdown, will fault be reported and orderly shutdown, prevent windrow accident.
In step 3), signal at least includes dragline emergency stop switches, smoke signal, coal piling signal, indulges and tear signal, offset signals, frequency converter ready signal, cascading conveyors startup interlocking signals.
Embodiment 2: as shown in Figure 4, it is the system chart that a conticaster is connected with frequency converter, conticaster adopts 2 ~ 3 electrical motors to be that 1 stream synchronously drives throwing, each motor is that independent drive controls, not only require the necessary stringent synchronization speed governing of each motor, and require that speed regulation process is rapid, sensitive, level and smooth.The former conticaster of Guizhou large iron and steel enterprise group adopts DC speed regulation mode, and fault rate is high, poor synchronization, has had a strong impact on lumber recovery and the single current output of steel billet.For this situation, we adopt AC frequency conversion synchronous variable-speed scheme to transform conticaster.Consider motor installation place high temperature, humidity, bad environments, direct employing speed feedback is difficult to ensure that positioner and signal can work stably in a long term, thus based on the individual motor close loop control circuit of belt current feedback, multistage synchronous drive control system is formed.
Synchroballistic controls to adopt Based Intelligent Control rule presented hereinbefore
u ij (k) = k j [ a j (k) + bj (k) ] ? i j (k) - iav (k) ?( j = 1, 2, 3);
A j (k) in formula=-S i n g [i j (k)-iav (k)-$ i] bj (k)=S i n g [iav (k)-i j (k)-$ i] iav (k)=[i1 (k)+i2 (k)+i3 (k)] 3;
Compensating factor k j determines according to field control experience, $ i is that synchronizing current allows bandwidth of operation, actually be taken as 0. 5 A, i j (k) (j=1,2,3) for k moment 3 alternating current dynamos divide other load current sampled value (measuring in frequency converter).Reliable through improved conticaster, net synchronization capability is good, substantially increases continuous casting furnace number and single current output, also creates good condition for improving conticaster pulling rate.
The foregoing is only the preferred embodiment of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification sheets of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.

Claims (8)

1. a belt conveyor conveyer large-scale transmission master & slave control equipment, this equipment comprises multiple AC induction motor, by the synchronously driven belt conveyor of some AC induction motor, also comprise and drive each AC induction motor, the frequency converter equal with AC induction motor quantity, wherein a frequency converter is primary transducer, the power input of each frequency converter is connected with electrical network, and power output end is connected with the stator input of corresponding AC asynchronous motor; It is characterized in that: the motor shaft of the described AC induction motor be connected with primary transducer and the AC induction motor be connected with from frequency converter is rigidly connected, and the AC induction motor be connected with from frequency converter is with constant moment of force outputting power; The employing of the described AC induction motor be connected with primary transducer and the AC induction motor be connected with from frequency converter flexibly connects, and adopts speed control mode from machine; Equipment is respectively equipped with the inductor of the inductor detecting motor speed, the inductor detecting belt conveyor delivery speed, detection reductor oil temperature inductor, detection bowl temperature.
2. a kind of belt conveyor conveyer according to claim 1 large-scale transmission master & slave control equipment, is characterized in that: described primary transducer with adopt optical fiber link to carry out connecting communication from frequency converter.
3. a kind of belt conveyor conveyer according to claim 1 and 2 large-scale transmission master & slave control equipment, it is characterized in that: above-mentioned any frequency converter is convertible into primary transducer, by completing freely switching between speeds control and direct torque from a digital input end of machine or communication modes.
4. a kind of belt conveyor conveyer according to claim 1 large-scale transmission master & slave control equipment, is characterized in that: described in be rigidly connected at least comprise gear connect, chain connect one.
5. an operating method for belt conveyor conveyer large-scale transmission master & slave control equipment, it is characterized in that, the method comprises the following steps:
1), primary transducer starting up, primary transducer optimum configurations is complete, PLC programming and after human-machine interface configuration completes, by PROFIBUS network by download program to PLC, converter parameter is downloaded to frequency converter;
2), before running each frequency converter, for the first time, each frequency converter carries out the Static and dynamic identification of motor, and speed link can be finely tuned in real-world operation;
3), before system starts, PLC primary transducer checks that whether all protectors are normal, is first detected the various signals of belt conveyor machine by each sensor, from the status signal of frequency converter, the permission actuation signal of front and back connecting conveyor belt, these information are all input to PLC inside;
4), after all devices is ready, start belt conveyor, PLC primary transducer sends operation restricted speed signal, belt conveyor extensions alarm light is glimmered 10 seconds, PLC primary transducer first starter motor cooling fan after terminating, reductor cooling fan, start releasing of brake band-type brake, feed back to one when drg reaches and reach a signal to PLC, must be that three drgs all unclamp and put in place, now PLC starts each frequency converter, given frequency is inputted at touch-screen, frequency converter presses the given run signal output frequency of PLC, control motor by given serpentine curve soft start,
5), at the uniform velocity rise under the pick-up time of setting from frequency converter, belt conveyor starts complete when reaching command speed, PLC detects line speed and drum speed in real time by inductor, when the two speed difference exceedes specified value, sudden stop, and send skidding alerting signal;
6), when stopping, first slow down and stop from frequency converter, confirm all to shut down from frequency conversion feedback signal, detect when line speed reduces to 0 and start drg, wrap dead motor shaft, stop complete;
7), after belt conveyor normally starts, PLC detects state, the electric current/torque of AC induction motor, reductor oil temperature, the bowl temperature of each protector of belt conveyor in real time.
6., according to the operating method of claim a kind of belt conveyor conveyer according to claim 5 large-scale transmission master & slave control equipment, it is characterized in that, also comprise emergency protection, concrete protected mode is as follows:
1), when there being emergency episode artificially to trigger the anxious stopping time, PLC is anxious stops all frequency converters, and drg action locking immediately motor shaft implements stopping-down, stops in the fastest mode, is reduced to minimum by accident infringement;
2), all temperature exceed high PLC in limited time and only send alerting signal and do not shut down, and touch-screen can display alarm, temperature continue to be increased beyond high in limited time, PLC sends breakdown signal and orderly shutdown;
3), there is belt conveyor sideslip alarm, when continuous 10 seconds, will fault be reported and orderly shutdown;
4) fault will be reported and orderly shutdown when, there is coal piling, smog, skidding;
5) when, brake malfunctions reaches dropout, frequency converter stops anxious.
7.6), under multiple stage frequency converter linkage status wherein a frequency converter et out of order time sudden stop, to ensure not damage other frequency converter;
7), brake when line speed reduces to 0 is detected;
8), when downstream conveyor machine malfunction shutdown, will fault be reported and orderly shutdown, prevent windrow accident.
8. the operating method of a kind of belt conveyor conveyer according to claim 5 large-scale transmission master & slave control equipment, is characterized in that: in step 3), signal at least includes dragline emergency stop switches, smoke signal, coal piling signal, indulges and tear signal, offset signals, frequency converter ready signal, cascading conveyors startup interlocking signals.
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Cited By (8)

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CN111517090A (en) * 2020-04-30 2020-08-11 广东水电二局股份有限公司 Belt conveyor scram control system
CN111781901A (en) * 2020-06-28 2020-10-16 淮南北新建材有限公司 Control device and control method thereof, and gypsum board production line

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CN105438727A (en) * 2015-12-09 2016-03-30 山东钢铁股份有限公司 Control method and system for bidirectional and double-drive belt
CN106144489A (en) * 2016-01-28 2016-11-23 上海颐坤自动化控制设备有限公司 Colliery conveying energy conserving system
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CN107291040A (en) * 2017-08-02 2017-10-24 中天钢铁集团有限公司 Prevent the safety interlock system and control method of dedusting fan burn-out of bearing
CN108220861A (en) * 2018-03-30 2018-06-29 哈尔滨理工大学 A kind of compressor crank shaft applies molybdenum control method
CN110963256A (en) * 2019-11-21 2020-04-07 青岛中加特电气股份有限公司 Self-adaptive speed regulation control method for conveyor
CN111517090A (en) * 2020-04-30 2020-08-11 广东水电二局股份有限公司 Belt conveyor scram control system
CN111781901A (en) * 2020-06-28 2020-10-16 淮南北新建材有限公司 Control device and control method thereof, and gypsum board production line

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