CN104438361B - Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system - Google Patents
Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system Download PDFInfo
- Publication number
- CN104438361B CN104438361B CN201410641791.6A CN201410641791A CN104438361B CN 104438361 B CN104438361 B CN 104438361B CN 201410641791 A CN201410641791 A CN 201410641791A CN 104438361 B CN104438361 B CN 104438361B
- Authority
- CN
- China
- Prior art keywords
- speed
- motor
- upper roller
- torque current
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The invention relates to the field of testing of rolling mill main transmission electromechanical systems, in particular to a load experimenting and testing method for a rolling mill alternating current main transmission electromechanical system. Devices involved in the method comprise two main drive motors for an upper roller and a lower roller of a rolling mill, a motor electric transmission unit, a mechanical transmission shaft, rolling mill rollers and a rolling mill press-down adjusting device. According to the method, an upper roller electromechanical transmission control system and a lower roller electromechanical transmission control system are completely independent, on the premise that forced-contract of an upper roller and a lower roller is reset, the current limit value of positive and negative rotation torque of the upper roller and the lower roller is set, the motor speed of the control part of the upper roller and the lower roller is set, the lower roller is made in a power driven state under the action of friction force on the surface of the rollers, the upper roller is made in a power generating state, the torque limit value is modified gradually to reach the maximum torque current value needed by rolling, and the testing work of the whole system can be completed.
Description
Technical field
The present invention relates to Main Drive of Rolling Mill Mechatronic Systems field tests, particularly devise a kind of milling train alternating current owner and pass
Dynamic dynamic loading test method.
Background technology
Milling train is to produce one of key equipment of finished metal material, drives the high capacity motor that milling train runs typically to have
High voltage, high current, Large Copacity, high pulling torque, the feature of high overload, the main transmission performance indications for Motor Control are excellent
Bad and reliability has direct impact to the operating condition of milling train, also most important to Rolling Production.Due to the operation of rolling pair
The process that continuity degree, operating rate, security have high requirements, need before actual Rolling Production to motor and its electrically and
Machine driven system is completely tested.Otherwise easily waste product waste material occurs in actual production process, or even cause serious
Associate device accident.Therefore, those skilled in the art are completed with the dynamic adjustment before the formal production of Main Drive of Rolling Mill and test is
Very important.
Traditional Main Drive of Rolling Mill load test is separately carried out to electric control system and mechanical driving part, and
Most of occasion is restricted by field condition, high-power machinery running part before strip rolling cannot load on greatly, can only
Reference device manufacture is dispatched from the factory parameter.Test to electric part is to the static state of motor, dynamic in driving control system
Can be tested, wherein dynamic load process is carried out after motor excitation link test link completes to optimize, and generally adopts
Two close cycles test method.Test and optimize torque current ring first, on here basis, simultaneously optimal speed controls for test
Ring.
The Main Drive of Rolling Mill load test method that prior art is used, is carrying out torque current loading to main driving motor
During test, for true reflection system as far as possible in the response condition of the true operation of rolling, it usually needs be loaded into the specified electricity of motor
1.5～2.0 times of flow valuve, although now ensureing do not have the excitatory output of motor in control system, prevent from being loaded
Analog rolling torque current produces uncontrollable moment of torsion in the presence of motor remanent magnetism or sensing magnetic flux, needs motor rotor
Part be fixed, fastening means and and fixation power typically just complete by artificial experience；In order to ensure that roll etc. sets
Standby safety is in addition it is also necessary to remove the mechanical drive shaft of motor and roll.Because integral device is huger, such test
Process preparation is complicated and there is certain risk.
Content of the invention
For solving above-mentioned technical problem, present invention particularly provides a kind of milling train exchange main transmission load test method, the party
Method is used for any Main Drive of Rolling Mill Mechatronic Systems performance test that up-down rollers individual motor drives, and does not need to master in test process
Intermediate propeller shaft between motor and roll is implemented to remove it is not required that implementing when big torque current is tested to main motor
Rotor portion is fixed, thus whole test efficiency can be improved；And, the test being carried out using the method, in test process
In power consumption compare conventional method and be also greatly lowered, there is significant energy-saving effect.The method is conducive to more pacifying
Entirely, accurately and rapidly complete the electromechanical properties test of mill main drive system.
A kind of milling train exchange main transmission dynamic load method of testing that the present invention provides, specifically includes following steps:
Step 1: control centre is adjusted with roll gap adjustment device, upper roller speed regulator, upper roller current regulator, lower roller speed
Device and lower roll current regulator are set up and are connected, and arrange parameter, including speed reference v of topping roll motorset1, bottom roll motor
Speed reference vset2, after control centre sends test starting signal, issue top and bottom rolls Roll-gap position first and adjust with pressure
Whole instruct to roll gap adjustment device, that is, control centre sets gap values between rollers x1=0, set rolling force value x2For analog rolling power and export,
Complete upper and lower roll gap to reset and realize being pressed against, and make to produce the roll-force being similar to normally produce between top and bottom rolls；
Step 2: after completing top and bottom rolls position adjustment, start the following test of motor base speed,
2.1 in the controlling the heart set upper roller motor speed value y1With lower roll motor speed value z1, wherein, y1=vset1、z1=
vset2、vset1=vset2=n1, n1Span be 0 < n1≤nj, njFor motor base speed, n1Set for the following speed of motor base speed
Definite value；
2.2 setting upper roller motor speed value y1With lower roll motor speed value z1Forward and reverse torque current amplitude limit of upper roller is y2、
Opposing torque current limit is-y2, upper roller torque current value is iset1；Set the forward torque current limit of lower roll as z2, reversely
Torque current amplitude limit-z2, lower roll torque current value is iset2, y2=-y2=iset2, z2=-z2=iset1, iset2=0.55ie,
iset1=0.5ie, ieFor the specified current value of motor；
After 2.3 complete above setting, confirm that machinery, hydraulic pressure, lubricating system are ready, milling train control section, power section, encourage
Magnetic part has kept normal operating conditions, starts milling train and runs；Due to speed sync, between top and bottom rolls, there is no active force, roll
Machine runs and is in zero load Light Condition, and no-load torque electric current is 5～10%ie；
After 2.4 confirm above state, in downward roller motor speed setting value, increase step signal vset3, vset3=5%
vset2, in the presence of the roll surface frictional force being produced due to draught pressure between top and bottom rolls, still will between top and bottom rolls
Keep speed sync, lower roll is in motoring condition；Because the speed of upper roller is configured without changing, actual speed can be consistently lower than,
Therefore upper roller works in generating state, until the torque current that top and bottom rolls motor detects in control centre reaches setting simultaneously
0.5ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
2.5 return to steps 2.2, resetting upper roller torque current value is iset1=ie, lower roll torque current value is iset2=
1.05ie, keep other parameters constant, repeat above procedure, make the milling train electric current of top and bottom rolls motor reach setting simultaneously
1.0ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
2.6 again return to step 2.2, and resetting upper roller torque current value is iset1=itmax, lower roll torque current value is
iset1=1.05itmax, keep other parameters constant, repeat above procedure, so that the milling train electric current of top and bottom rolls motor is reached simultaneously
The 1.05i settingtmax, itmaxTorque capacity electric current needed for mill main drive system, tests the speed during this and torque electricity
Stream change curve is for adjusting the current regulator of Main Drive of Rolling Mill Mechatronic Systems and the parameter of speed regulator, full to reach
The dynamic response index that sufficient Rolling Production load needs, treats that all indexs reach below technological requirement value rear motor base speed and tested
Become；
Step 3: start the above test of motor base speed,
3.1 in the controlling the heart set upper roller motor speed value y1With lower roll motor speed value z1, wherein, y1=vset1、z1=
vset2、vset1=vset2=n2, n2Span be nj<n2≤nmax, nmaxLimit for motor maximum speed, n2For motor base
The above speed setting value of speed；
3.2 setting upper roller motor speed value y1With lower roll motor speed value z1Forward and reverse torque current amplitude limit of upper roller is y2、
Opposing torque current limit is-y2, upper roller torque current value is iset1；Set the forward torque current limit of lower roll as z2, reversely
Torque current amplitude limit-z2, lower roll torque current value is iset2, y2=-y2=iset2, z2=-z2=iset1, iset2=0.55ie,
iset1=0.5ie, ieFor the specified current value of motor；
After 3.3 complete above setting, confirm that machinery, hydraulic pressure, lubricating system are ready, milling train control section, power section, encourage
Magnetic part has kept normal operating conditions, starts milling train and runs；Due to speed sync, between top and bottom rolls, there is no active force, roll
Machine runs and is in zero load Light Condition, and no-load torque electric current is 5～10%ie；
After 3.4 confirm above state, in downward roller motor speed setting value, increase step signal vset3, vset3=5%
vset2, in the presence of the roll surface frictional force being produced due to draught pressure between top and bottom rolls, still will between top and bottom rolls
Keep speed sync, lower roll is in motoring condition；Because the speed of upper roller is configured without changing, actual speed can be consistently lower than,
Therefore upper roller works in generating state, until the torque current that top and bottom rolls motor detects in control centre reaches setting simultaneously
0.5ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
3.5 return to steps 3.2, resetting upper roller torque current value is iset1=ie, lower roll torque current value is iset2=
1.05ie, keep other parameters constant, repeat above procedure, make the milling train electric current of top and bottom rolls motor reach setting simultaneously
1.0ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
3.6 again return to step 3.2, and resetting upper roller torque current value is iset1=itmax, lower roll torque current value is
iset1=1.05itmax, keep other parameters constant, repeat above procedure, so that the milling train electric current of top and bottom rolls motor is reached simultaneously
The 1.05i settingtmax, itmaxTorque capacity electric current needed for mill main drive system, tests the speed during this and torque electricity
Stream change curve is for adjusting the current regulator of Main Drive of Rolling Mill Mechatronic Systems and the parameter of speed regulator, full to reach
The dynamic response index that sufficient Rolling Production load needs treats that all indexs reach more than technological requirement value rear motor base speed and tested
Become.
Equipment involved by said method includes two sets of main drive motors of milling train up-down rollers, motor Electrified Transmission list
Unit and mechanical drive shaft, rolling mill roll, rolling mill screwdown adjusting apparatus.Wherein,
The output of described Electrified Transmission unit is connected with corresponding main drive motor terminals respectively, and Electrified Transmission unit is
Motor provides electric energy；Described Electrified Transmission unit include for main transmission Properties Control adjustment control section, be used for electric power
The power section of electronics conversion and the excitation part controlling for motor exciting curent；Described control section is general numeral
Drive controller, can adjust the speed governing characteristic of controlled motor, torque current characteristic etc. by changing setup parameter, and
And the working method of electrical drive control system unit can be changed；Described power section adopts general three-phase unsteady flow mode, permissible
AC power certain to voltage, frequency is transformed to the power supply output of voltage, changeable frequency by the output signal according to control unit
To described main drive motor.Described excitation is partially completed the exciting curent output control needed for motor running.
Described milling train top and bottom rolls pass through respective mechanical drive shaft and respective main drive motor rotor portion respectively
Output end is connected, and roll is the general name of backing roll and working roll herein；
Described rolling mill screwdown device is connected with rolling mill roll with hydraulic cylinder by the Electro-pressing screw of rolling equipment body,
Described rolling mill screwdown device includes hydraulic pressing part and its position, pressure control unit, has the upper and lower roller gap of regulation and phase
Effect to pressure.
The power section of the motor Electrified Transmission unit of described up-down rollers is using direct current supply bus mode altogether, or adopts
Completely self-contained rectifier, and the rectifier powered for Main Drive of Rolling Mill is the four-quadrant rectification dress with energy feedback function
Put.
The control section of the motor Electrified Transmission unit of described up-down rollers is separate, and that is, up-down rollers have respective numeral
Drive controller；The inverter of the motor Electrified Transmission cell power part of described up-down rollers independently, and is controlled by each
Digital drive controller from control section.
Because described up-down rollers Mechanical ＆ electrical Transmission Control system is completely independent, the alternating current of respective electric control unit output
The pressure amplitude of component and frequency are adjustable, and the moment of torsion of corresponding respective motor rotor output shaft end can be by electrical control list
Unit separately provides.After top and bottom rolls rely on the throw-on pressure that rolling mill screwdown device provides to force together, rubbing between top and bottom rolls
Wiping power makes there is not relative motion between roll, thus does not also have relative motion between up-down rollers driven motor machine rotor, on
The actual speed of lower roller mill electric control unit is strictly consistent.
When carrying out milling train exchange main transmission dynamic loading test, the Aided Machine of described milling train, hydraulic pressure, lubricating system are
Ready, the control section of milling train up-down rollers motor, power section, excitation part have possessed preliminary service condition, all devices
Keep the working condition before normal production.Under the premise of here, described rolling mill screwdown device is corresponding positions by Electro-pressing part
Put control unit to reset upper and lower roller gap, that is, seamless between up-down rollers；And then the Stress control of described rolling mill screwdown device
Unit passes through hydraulic pressing and partly up-down rollers is realized being pressed against, even if producing the rolling being similar to normally produce between up-down rollers
Power.
Now described upper and lower roller mill control section is all set in normal speed control mode, by forward and reverse turn of upper roller
Square amplitude limit is all set as torque current value to be tested, i.e. the electronic current limit same with generating state setting, only symbol
Have any different.The torque amplitude limit of lower roll is all set as exceeding certain amplitude (as 5%) than torque current value to be tested, is similarly
The electronic current limit same with generating state setting, only symbol is had any different.Up-down rollers give same linear velocity and run, institute
State rolling main drive motor and respective roll operation is taken to by mechanical drive shaft, because up-down rollers roll surface has identical linear speed
Degree, up-down rollers motor running now only needs to overcome the rolling frictional resistance of drive system rotating part, and torque now is
No-load torque, up-down rollers Electrified Transmission unit output torque electric current is within the 10% of normal rating torque current, and all runs
In positive motoring condition.
Preferably, rise above the electronic machine speed of upper roller when the electromotor velocity by described lower roller mill control section sets
When degree sets, now by acting on that lower roll Electrified Transmission unit speed controls, the power part of lower roll motor Electrified Transmission unit
Divide and by exporting enough torque currents, lower roll motor is improved to the speed of service setting, be pressed against due between top and bottom rolls
The effect of power, cannot produce relative motion between top and bottom rolls roll surface, therefore upper roller motor will follow the speed of lower roll motor
Degree raises, but by acting on that upper roller Electrified Transmission unit speed controls, speed control saturation quickly, the i.e. electronic electrical-mechanical of upper roller
The power section of gear unit is exported set torque current amplitude limit value at once, but because this amplitude limit value sets less than lower roll
Fixed amplitude limit value, now upper roller be in generating state, and lower roll is in motoring condition.The resistance of now up-down rollers operating is mainly
The force of sliding friction of roll surface provides, equal in magnitude, in opposite direction, and both reach the torque current amplitude limit of control section setting simultaneously
Value.It is different torque current value by changing the torque amplitude limit in upper and lower roller mill control section, and be progressively loaded into electronic
Machine required rolling torque capacity current value, you can complete to whole experiment work.
On the basis of completing above-mentioned main transmission load test, the energy-conservation that the present invention more provides during the method test is excellent
Gesture, due to carrying out in above-mentioned test process, because upper roller motor is generating state, lower roll motor is motoring condition, and
The electronic required energy of lower roll motor is substantially suitable to the ability on dc bus with upper roller motor electrification feedback, milling train electricity
The power section of gas gear unit significantly improves in the efficiency of grid side, and power consumption during test is compared traditional approach and subtracted
Few.
The invention has the beneficial effects as follows, due to adopting technique scheme, Main Drive of Rolling Mill provided by the present invention is online
Load test method and circuit, with respect to traditional load mode it is not necessary to carry out to the large-scale jackshaft of motor and roll
Dismounting and time dress, it is not required that being mechanically fixed to the rotor portion of tested motor, can significantly reduce answering of test
Miscellaneous degree.Simultaneously as up-down rollers energy during the method test can be entered by common DC bus or altogether ac bus mode
Row exchanges so that the total electric energy repeatedly being consumed in test process is also effectively controlled.
Brief description
The Main Drive of Rolling Mill Mechatronic Systems schematic diagram that Fig. 1 drives for up-down rollers.
Fig. 2 illustrates Fig. 1 for mair motor Electrified Transmission cell power part line.
Fig. 3 illustrates Fig. 2 for mair motor Electrified Transmission cell power part line.
Fig. 4 is dynamic loading test controlling unit schematic diagram.
Fig. 5 is Main Drive of Rolling Mill dynamic loading test method flow diagram.
Fig. 6 is embodiment load test curve map.
Specific embodiment
Below in conjunction with the accompanying drawings specific embodiments of the present invention are described further.
As shown in figure 1, up-down rollers drive Main Drive of Rolling Mill Mechatronic Systems comprise up-down rollers main transmission alternating current generator and its
Electrified Transmission unit 1,2；Milling train top and bottom rolls 3,4；Milling train up-down rollers roll-separating mechanism 5；And be used for connecting roll and electricity
The universal-joint spindle 6 of machine, power transmission shaft 7, shaft coupling 8,9 etc..
Top and bottom rolls are typically made up of working roll respectively and support roller, i.e. four-high mill, and support roller is directly pressed with working roll
It is abutted against tactile, it plays the effect of the intensity strengthening working roll and rigidity.Either mair motor drives working roll still to drive support
Roller, this method is all effective, is also applied for the two-roller mill of only working roll.
Described top and bottom rolls 3,4 pass through the rotor machinery output of universal-joint spindle, power transmission shaft etc. and main driving motor respectively
Axle is connected, and is transmitted to roll with the mechanical energy realizing mair motor.Top and bottom rolls are operated alone by two motors respectively, roll
Speed sync to be ensured by electrical equipment；
Described milling train up-down rollers roll-separating mechanism 5 is also referred to as rolling mill screwdown adjusting apparatus, generally comprises hydraulic pressing part
And its position, pressure control unit, for adjusting relative position and the relative pressure of top and bottom rolls, providing in the operation of rolling needs
The rolling roll gap wanted and draught pressure.
The connection of described main transmission alternating current generator and corresponding Electrified Transmission unit is referring to Fig. 2 or Fig. 3.M1, m2 are respectively
Drive the motor of top and bottom rolls；I1, i2 are respectively the inverter that upper and lower roller motor is powered, and are controlled by respective electrical drive control system
Part.Fig. 2 show upper and lower roller motor and uses same rectifier r1, using common direct current supply bus mode, under this kind of mode, surveys
Upper roller motor feedback electric energy during examination can be used for lower roll motoring condition on dc bus pdc and uses；Fig. 3 show
Using rectifier r1, r2 independently, under this kind of mode, the upper roller motor feedback electric energy in test process needs lower roller motor
Power supply side is returned by upper roller rectifier and could be used for the use of lower roll motoring condition.
The action schematic diagram of main driving motor control section and roll gap regulation system in dynamic loading test shown in Fig. 4.Main
Electrically to be passed by control centre 10, roll gap regulation control device 11, upper roller motor electrical drive control system part 12 and lower roller motor
Dynamic control section 13 grade composition.Described control centre 10 is responsible for providing required control setting value, bag during load test
Include fixed value of roller slit x1, draught pressure setting value x2, upper roller motor speed setting value y1, upper roller motor torque current limit set
Value y2, lower roll motor speed setting value z1, lower roll motor torque current limit setting value z2.
Described control centre 10 issues fixed value of roller slit x1With draught pressure setting value x2Export roll gap regulation control device
In 11, there is in roll gap setter position control module and pressure control module, the actual bit confidence returning by milling train detection
Numbers 111 and actual draught pressure signal 112 completing closed-loop control.
Described control centre 10 issues upper roller motor speed setting value y respectively1, upper roller motor torque current limit setting value
y2Speed regulator and current regulator to upper roller motor electrical drive control system part 12.The reality being returned by motor side detection
Border motor velocity signal 121 and actual motor current signal 122 are completing closed-loop control.
Described control centre 10 issues lower roll motor speed setting value z respectively1, upper roller motor torque current limit setting value
z2Speed regulator and current regulator to upper roller motor electrical drive control system part 13.The reality being returned by motor side detection
Border motor velocity signal 131 and actual motor current signal 132 are completing closed-loop control.
Fig. 5 is Main Drive of Rolling Mill dynamic loading test method flow diagram, is rolled with above-mentioned control device with reference to Benturi
The method that owner is driven Mechatronic Systems dynamic loading test is as follows:
Step 1: control centre is adjusted with roll gap adjustment device, upper roller speed regulator, upper roller current regulator, lower roller speed
Device and lower roll current regulator are set up and are connected, and arrange parameter, including speed reference v of topping roll motorset1, bottom roll motor
Speed reference vset2, after control centre sends test starting signal, issue top and bottom rolls Roll-gap position first and adjust with pressure
Whole instruct to roll gap adjustment device, that is, control centre sets gap values between rollers x1=0, set rolling force value x2For analog rolling power and export,
Complete upper and lower roll gap to reset and realize being pressed against, and make to produce the roll-force being similar to normally produce between top and bottom rolls；
Step 2: after completing top and bottom rolls position adjustment, start the following test of motor base speed,
2.1 in the controlling the heart set upper roller motor speed value y1With lower roll motor speed value z1, wherein, y1=vset1、z1=
vset2、vset1=vset2=n1, n1Span be 0 < n1≤nj, njFor motor base speed, n1Set for the following speed of motor base speed
Definite value；
2.2 setting upper roller motor speed value y1With lower roll motor speed value z1Forward and reverse torque current amplitude limit of upper roller is y2、
Opposing torque current limit is-y2, upper roller torque current value is iset1；Set the forward torque current limit of lower roll as z2, reversely
Torque current amplitude limit-z2, lower roll torque current value is iset2, y2=-y2=iset2, z2=-z2=iset1, iset2=0.55ie,
iset1=0.5ie, ieFor the specified current value of motor；
After 2.3 complete above setting, confirm that machinery, hydraulic pressure, lubricating system are ready, milling train control section, power section, encourage
Magnetic part has kept normal operating conditions, starts milling train and runs；Due to speed sync, between top and bottom rolls, there is no active force, roll
Machine runs and is in zero load Light Condition, and no-load torque electric current is 5～10%ie；
After 2.4 confirm above state, in downward roller motor speed setting value, increase step signal vset3, vset3=5%
vset2, in the presence of the roll surface frictional force being produced due to draught pressure between top and bottom rolls, still will between top and bottom rolls
Keep speed sync, lower roll is in motoring condition；Because the speed of upper roller is configured without changing, actual speed can be consistently lower than,
Therefore upper roller works in generating state, until the torque current that top and bottom rolls motor detects in control centre reaches setting simultaneously
0.5ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
2.5 return to steps 2.2, resetting upper roller torque current value is iset1=ie, lower roll torque current value is iset2=
1.05ie, keep other parameters constant, repeat above procedure, make the milling train electric current of top and bottom rolls motor reach setting simultaneously
1.0ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
2.6 again return to step 2.2, and resetting upper roller torque current value is iset1=itmax, lower roll torque current value is
iset1=1.05itmax, keep other parameters constant, repeat above procedure, so that the milling train electric current of top and bottom rolls motor is reached simultaneously
The 1.05i settingtmax, itmaxTorque capacity electric current needed for mill main drive system, tests the speed during this and torque electricity
Stream change curve is for adjusting the current regulator of Main Drive of Rolling Mill Mechatronic Systems and the parameter of speed regulator, full to reach
The dynamic response index that sufficient Rolling Production load needs, treats that all indexs reach below technological requirement value rear motor base speed and tested
Become；
Step 3: start the above test of motor base speed,
3.1 in the controlling the heart set upper roller motor speed value y1With lower roll motor speed value z1, wherein, y1=vset1、z1=
vset2、vset1=vset2=n2, n2Span be nj<n2≤nmax, nmaxLimit for motor maximum speed, n2For motor base
The above speed setting value of speed；
3.2 setting upper roller motor speed value y1With lower roll motor speed value z1Forward and reverse torque current amplitude limit of upper roller is y2、
Opposing torque current limit is-y2, upper roller torque current value is iset1；Set the forward torque current limit of lower roll as z2, reversely
Torque current amplitude limit-z2, lower roll torque current value is iset2, y2=-y2=iset2, z2=-z2=iset1, iset2=0.55ie,
iset1=0.5ie, ieFor the specified current value of motor；
After 3.3 complete above setting, confirm that machinery, hydraulic pressure, lubricating system are ready, milling train control section, power section, encourage
Magnetic part has kept normal operating conditions, starts milling train and runs；Due to speed sync, between top and bottom rolls, there is no active force, roll
Machine runs and is in zero load Light Condition, and no-load torque electric current is 5～10%ie；
After 3.4 confirm above state, in downward roller motor speed setting value, increase step signal vset3, vset3=5%
vset2, in the presence of the roll surface frictional force being produced due to draught pressure between top and bottom rolls, still will between top and bottom rolls
Keep speed sync, lower roll is in motoring condition；Because the speed of upper roller is configured without changing, actual speed can be consistently lower than,
Therefore upper roller works in generating state, until the torque current that top and bottom rolls motor detects in control centre reaches setting simultaneously
0.5ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
3.5 return to steps 3.2, resetting upper roller torque current value is iset1=ie, lower roll torque current value is iset2=
1.05ie, keep other parameters constant, repeat above procedure, make the milling train electric current of top and bottom rolls motor reach setting simultaneously
1.0ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
3.6 again return to step 3.2, and resetting upper roller torque current value is iset1=itmax, lower roll torque current value is
iset1=1.05itmax, keep other parameters constant, repeat above procedure, so that the milling train electric current of top and bottom rolls motor is reached simultaneously
The 1.05i settingtmax, itmaxTorque capacity electric current needed for mill main drive system, tests the speed during this and torque electricity
Stream change curve is for adjusting the current regulator of Main Drive of Rolling Mill Mechatronic Systems and the parameter of speed regulator, full to reach
The dynamic response index that sufficient Rolling Production load needs, treats that all indexs reach more than technological requirement value rear motor base speed and tested
Become.
Embodiment:
Using said method, load test is carried out to the roughing mill main transmission Mechatronic Systems that up-down rollers drive.This milling train
Up-down rollers motor is identical, and power is 5000kw, and rated current is 990a, 60 revs/min of maximum speed, 30 revs/min of base speed；
Electrified Transmission unit adopts the common DC bus structure shown in Fig. 2, and that is, respective inverter is separate, and rectifier exports simultaneously
Connection.Respectively corresponding loading is carried out to the different torque currents responses below base speed and more than base speed according to order described in method
Test, can be rapidly completed systematic parameter adjustment by the response curve recording.With traditional dismounting power transmission shaft, fixing rotor
Method compare, the experimentation time greatly reduces, and efficiency is improved；Because rotor rolls one with normal in test process
Sample rotates, and does not also exist due to the improper danger causing rotor to rotate of fixing force adjustment；In test process, up-down rollers electronic with
To be exchanged at dc bus, the electric energy taking from electrical network reduces more than 70% than conventional method to feedback energy.Fig. 6 show
When 10 revs/min of low regime test rated torque current and 50 revs/min of test 50% rated torque current in high velocity one group
Typical curve.
By above milling train dynamic loading test method description as can be seen that when using the method, motor is protected with roll
Hold normal connection status, dismounting power transmission shaft, shaft coupling need not be done, rotor part need not be mechanically fixed etc.
Hard work；The test process complete analog rolling state that the method is carried out, is set as normal draught pressure, master between roll
Driving motor is set as the low speed segment normally rolling and high regime is run, motor torque electric current is to test under dynamic rotary；Using
During the method carries out load test, because lower roller motor is operated in motoring condition, and upper roller motor is operated in generating state,
Either in dc bus side or in power supply side, two parts electric energy has complementary effect, the electric energy loss in test process
More traditional single motor load mode significantly reduces.
Claims (1)
1. a kind of milling train exchange main transmission Mechatronic Systems load test method of testing is it is characterised in that specifically include following steps:
Step 1: control centre and roll gap adjustment device, upper roller speed regulator, upper roller current regulator, lower roll speed regulator and
Lower roll current regulator is set up and is connected, and arrange parameter, including speed reference v of topping roll motorset1, bottom roll motor
Speed reference vset2, after control centre sends test starting signal, issue top and bottom rolls Roll-gap position first and adjust with pressure
Instruct to roll gap adjustment device, i.e. control centre's setting gap values between rollers x1=0, set rolling force value x2For analog rolling power and export,
Complete upper and lower roll gap to reset and realize being pressed against, and make to produce the roll-force being similar to normally produce between top and bottom rolls；
Step 2: after completing top and bottom rolls position adjustment, start the following test of motor base speed,
2.1 in the controlling the heart set upper roller motor speed value y1With lower roll motor speed value z1, wherein, y1=vset1, z1=
Vset2, vset1= vset2=n1, n1Span be 0 ＜ n1≤nj, njFor motor base speed, n1Following for motor base speed
Speed setting value；
2.2 setting upper roller motor speed value y1With lower roll motor speed value z1, set the forward torque current limit of upper roller as
Y2, opposing torque current limit be-y2, upper roller torque current value is iset1；Set the forward torque current limit of lower roll as
Z2, opposing torque current limit-z2, lower roll torque current value is iSet2, set y2=-y2=iset2, z2=-z2
=iset1, iset2=0.55ie, iset1=0.5ie, ieFor the specified current value of motor；
After 2.3 complete above setting, confirm that machinery, hydraulic pressure, lubricating system are ready, milling train control section, power section, excitation division
Divide and kept normal operating conditions, start milling train and run；Due to speed sync, between top and bottom rolls, there is no active force, milling train is transported
Row is in zero load Light Condition, and no-load torque electric current is 5-10%ie；
After 2.4 confirm above state, in downward roller motor speed setting value, increase step signal vset3, vset3=5%
Vset2, in the presence of the roll surface frictional force being produced due to draught pressure between top and bottom rolls, still will between top and bottom rolls
Keep speed sync, lower roll is in motoring condition；Because the speed of upper roller is configured without changing, actual speed can be consistently lower than,
Therefore upper roller works in generating state, until the torque current that top and bottom rolls motor detects in control centre reaches setting simultaneously
0.5ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
2.5 return to steps 2.2, resetting upper roller torque current value is iset1=ie, lower roll torque current value is iset2=1.05ie,
Keep other parameters constant, repeat above procedure, make the milling train electric current of top and bottom rolls motor reach the 1.0i of setting simultaneouslye, survey
Try the speed during this and torque current change curve, for adjusting current regulator and the speed of Main Drive of Rolling Mill Mechatronic Systems
The parameter of degree adjuster；
2.6 again return to step 2.2, and resetting upper roller torque current value is iset1=itmax, lower roll torque current value is iset2=
1.05itmax, itmaxTorque capacity electric current needed for mill main drive system, keeps other parameters constant, repeats above procedure, make
The milling train electric current of top and bottom rolls motor reaches the 1.05i of setting simultaneouslytmax, test the speed during this and change with torque current
Curve, for adjusting the current regulator of Main Drive of Rolling Mill Mechatronic Systems and the parameter of speed regulator, meets rolling to reach
The dynamic response index that produce load needs, treats that all indexs reach the following test of technological requirement value rear motor base speed and complete；
Step 3: start the above test of motor base speed,
3.1 in the controlling the heart set upper roller motor speed value y1With lower roll motor speed value z1, wherein, y1=vset1, z1=
Vset2, vset1= vset2=n2, n2Span be nj＜ n2≤nmax, nmaxLimit for motor maximum speed, n2For electricity
The above speed setting value of machine base speed；
3.2 setting upper roller motor speed value y1With lower roll motor speed value z1, set the forward torque current limit of upper roller as
Y2, opposing torque current limit be-y2, upper roller torque current value is iset1；Set the forward torque current limit of lower roll as
z2, opposing torque current limit-z2, lower roll torque current value is iset2, set y2=-y2=iset2, z2=-z2=
iset1, iset2=0.55ie, iset1=0.5ie, ieFor the specified current value of motor；
After 3.3 complete above setting, confirm that machinery, hydraulic pressure, lubricating system are ready, milling train control section, power section, excitation division
Divide and kept normal operating conditions, start milling train and run；Due to speed sync, between top and bottom rolls, there is no active force, milling train is transported
Row is in zero load Light Condition, and no-load torque electric current is 5-10%ie；
After 3.4 confirm above state, in downward roller motor speed setting value, increase step signal vset3, vset3=5%
Vset2, in the presence of the roll surface frictional force being produced due to draught pressure between top and bottom rolls, still will between top and bottom rolls
Keep speed sync, lower roll is in motoring condition；Because the speed of upper roller is configured without changing, actual speed can be consistently lower than,
Therefore upper roller works in generating state, until the torque current that top and bottom rolls motor detects in control centre reaches setting simultaneously
0.5ie, test the speed during this and torque current change curve, the electric current for adjusting Main Drive of Rolling Mill Mechatronic Systems is adjusted
Section device and the parameter of speed regulator；
3.5 return to steps 3.2, resetting upper roller torque current value is iset1=ie, lower roll torque current value is iset2=1.05ie,
Keep other parameters constant, repeat above procedure, make the milling train electric current of top and bottom rolls motor reach the 1.0i of setting simultaneouslye, survey
Try the speed during this and torque current change curve, for adjusting current regulator and the speed of Main Drive of Rolling Mill Mechatronic Systems
The parameter of degree adjuster；
3.6 again return to step 3.2, and resetting upper roller torque current value is iset1=itmax, lower roll torque current value is iset2=
1.05itmax, itmaxTorque capacity electric current needed for mill main drive system, keeps other parameters constant, repeats above procedure,
Make the milling train electric current of top and bottom rolls motor reach the 1.05i of setting simultaneouslytmax, test the speed during this and become with torque current
Change curve, for adjusting the current regulator of Main Drive of Rolling Mill Mechatronic Systems and the parameter of speed regulator, rolled with reaching satisfaction
The dynamic response index that produce load processed needs, treats that all indexs reach the above test of technological requirement value rear motor base speed and complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641791.6A CN104438361B (en) | 2014-11-13 | 2014-11-13 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410641791.6A CN104438361B (en) | 2014-11-13 | 2014-11-13 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104438361A CN104438361A (en) | 2015-03-25 |
| CN104438361B true CN104438361B (en) | 2017-01-18 |
Family
ID=52885554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410641791.6A Expired - Fee Related CN104438361B (en) | 2014-11-13 | 2014-11-13 | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104438361B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107520258B (en) * | 2016-06-22 | 2019-04-16 | 上海梅山钢铁股份有限公司 | The test method of cold rolling mill motor losses torque coefficient |
| CN106862276B (en) * | 2017-02-07 | 2018-09-14 | 山西太钢不锈钢股份有限公司 | Hot tandem rolling special steel main transmission overload control method |
| CN107470370B (en) * | 2017-08-11 | 2019-10-01 | 马鞍山钢铁股份有限公司 | A kind of control method for preventing fashioned iron blooming mill main drive motor from persistently rolling card |
| CN107377636A (en) * | 2017-08-11 | 2017-11-24 | 张家港联峰钢铁研究所有限公司 | A kind of abnormal current tracking method of rolling line production |
| CN107377631B (en) * | 2017-08-21 | 2019-07-30 | 马鞍山钢铁股份有限公司 | A kind of control system and method for preventing shape rolling mill depth from rolling card |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4150276B2 (en) * | 2003-03-20 | 2008-09-17 | 新日本製鐵株式会社 | Rolling method and rolling apparatus for metal sheet |
| JP5452968B2 (en) * | 2009-04-10 | 2014-03-26 | 株式会社日立製作所 | Rolling apparatus and control method thereof |
| CN102151694B (en) * | 2010-12-17 | 2013-04-24 | 武汉钢铁(集团)公司 | Method for recording real-time state curve of heavy rail during rolling process |
| CN102847725B (en) * | 2011-06-29 | 2015-07-08 | 株式会社日立制作所 | Control device of induction electric motor and control method of induction electric motor |
-
2014
- 2014-11-13 CN CN201410641791.6A patent/CN104438361B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN104438361A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104438361B (en) | Load experimenting and testing method for rolling mill alternating current main transmission electromechanical system | |
| CN103357667B (en) | Self-adaptive control method for speed between roller bed and rolling mill | |
| CN102684583B (en) | Big inertia load permanent magnet synchronous motor drive outage-restarting control method and device | |
| CN105363795B (en) | Rolling line taper rollgang speed dynamic cooperation control system and its method | |
| CN106549473A (en) | Tubular stranding machine steel wire rope unwrapping wire process drag energy is reclaimed and the device for utilizing | |
| CN204832458U (en) | Energy repayment type asynchronous machine test platform | |
| CN202424597U (en) | Starting device for main electric motor of ship bow thruster | |
| CN203014726U (en) | Synchronous control device for four driving motors of large-scale charging and discharging machine | |
| CN203387457U (en) | Special-purpose integrated frequency conversion driving device for unit brushless double-fed motor | |
| CN101950000A (en) | Dragging device for large and medium hydro-generator attribute test | |
| CN206775417U (en) | Threephase asynchronous electromagnetic braking circuit for screw bolt well | |
| CN105067925A (en) | Energy-recyclable frequency converter testing system, testing method and installation method | |
| CN201666944U (en) | Variable frequency speed-regulating power feedback energy-saving test system | |
| CN209462236U (en) | A kind of novel permanent magnetic synchronous motor | |
| CN103312258A (en) | Motor control system and method | |
| CA2824171C (en) | Electrical machine and method for operating such an electrical machine | |
| CN202910725U (en) | Frequency converting device of precision steel ball crusher spindle system | |
| CN207606104U (en) | A kind of stainless steel hot-rolling roller-way state-detection test platform | |
| CN201928223U (en) | Direct current governor system of pipe mill | |
| CN204262397U (en) | A kind of drilling machine | |
| CN201805398U (en) | Torque motor control device of cable drum of hanging fixture | |
| CN216929898U (en) | Brake control system suitable for cold-rolled steel coil production line | |
| CN202219194U (en) | Energy-saving paper shredder | |
| CN108345262A (en) | A kind of system and method for electric machine controller test distribution | |
| CN203851069U (en) | Excitation control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 Termination date: 20191113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |