CN103777105A - Variable frequency drive debugging method - Google Patents
Variable frequency drive debugging method Download PDFInfo
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- CN103777105A CN103777105A CN201410066878.5A CN201410066878A CN103777105A CN 103777105 A CN103777105 A CN 103777105A CN 201410066878 A CN201410066878 A CN 201410066878A CN 103777105 A CN103777105 A CN 103777105A
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Abstract
The invention discloses a variable frequency drive debugging method. The variable frequency drive debugging method includes following steps: using an electric current and voltage method to test ground resistance; checking a motor, and using a direct current and double arm bridge to test direct current resistance of the motor; testing electric cables of the motor; checking a frequency converter before the frequency converter is powered on; testing a control loop of the frequency converter in idle running mode; performing single machine debugging on the frequency converter; setting network parameters; operating an upper computer for a test run. The variable frequency drive debugging method can help personnel who are only trained in basic frequency conversion to rapidly perform debugging on the frequency converter, even complex debugging which is special in process on the frequency converter, and simultaneously saves debugging time, reduces problems and breakdowns, which appear in the debugging process, and enlarges the range in practical use of the frequency converter.
Description
Technical field
The present invention relates to frequency conversion field, particularly a kind of Frequency Drive adjustment method.
Background technology
It is very extensive that Frequency converting driving drags pattern utilization as a kind of motor, and a kind of motor driver that frequency converter utilizes Frequency converting driving principle to produce is just application converter technique and microelectric technique, controls AC motor by the frequency of operation that changes motor.It is mainly made up of rectification module, filtration module, inversion module brake unit, detection and micro-processing enter etc.
Frequency converting driving its superiority of having compared with traditional method that drags, for example: 1, control the startup of large electric current, the 7-8 that the electric current that especially its power frequency of large-size machine directly starts is about rated current doubly, has very large impact to electrical network.2, stepless level and smooth speed adjusting performance can meet the high-intensity technique of a lot of high precision.3, energy-saving and cost-reducing, in the various power-saving technologies of in recent years extensively promoting, especially, for techniques such as some water pump fans, its energy-saving effect is very obvious.4, by diverse network and computer system networking, can realize increasingly automated.
But in use unusual complexity of frequency converter, technical difficulty is high, it is also very high to user's requirement, need to be grasped various knowledge and experiences, especially to there is darker understanding to Electrified Transmission and frequency conversion, limit the range of application in practical application, and extended the debug time to frequency converter, increased the problem and the fault that in debug process, occur.
Summary of the invention
The invention provides a kind of Frequency Drive adjustment method, the present invention has shortened the debug time to frequency converter, has reduced the problem and the fault that in debug process, occur, described below:
A kind of Frequency Drive adjustment method, said method comprising the steps of:
(1) adopt electric current and voltage method test stake resistance; Motor is checked, adopt direct-flow double bridge testing of electric motors direct current resistance;
Motor cable is tested;
(2) frequency converter checks before powering on; The empty examination in Frequency Converter Control loop;
(3) frequency converter stand-alone debugging;
(4) network parameter setting; Host computer operation test run.
The step of described employing electric current and voltage method test stake resistance is specially:
The end E that connects testee connects 5m wire, and potential end P connects 20m wire, and current terminal C connects 40m wire, the other end of wire meets respectively measured object earthing pole E ˊ, current potential probe P ˊ and electric current probe C ˊ, and measured object ground connection E ˊ, current potential probe P ˊ, electric current probe C ˊ keep straight line, and spacing is 20m.
The step of described frequency converter stand-alone debugging is specially:
1) frequency converter motor is optimized; 2) parameter setting; 3) unit no load test; 4) band reductor test; 5) band sintering machine
Empty examination; 6) commissioning run test.
The operation of described unit no load test is specially: to the rated speed of frequency converter given 20%, check arbitrarily the various parametric lines in frequency converter rotation process, and record.
The beneficial effect of technical scheme provided by the invention is: this method is utilized west gate SINAMICS S120 transducer drive, proposed a kind of new frequency converter adjustment method, to phase Sihe, close engineering Frequency Drive debugging has very important directive significance to the method.And by using this method can help the only personnel through basic frequency conversion training rapidly frequency converter to be debugged, the even special complexity debugging of technique, save debug time simultaneously, reduced the problem and the fault that in debug process, occur, expanded frequency converter scope in actual applications.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of Frequency Drive adjustment method;
Fig. 2 is the schematic diagram of earth resistance.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Conventionally sintering machine and the weighing area belt conveyer scale of sintering engineering all adopt frequency converter to drag, especially comparatively complicated with dragging of sintering machine motor, this method is example by the debugging take sintering machine, utilize west gate SINAMICS S120 frequency converter to set forth the implementation process of this method, west gate SINAMICS S120 frequency converter is the frequency converter of a new model of Siemens Company's release, can replace the converter plant of traditional 6ES70 series, a central control unit just can be realized and control nearly four inverters and a fairing simultaneously, transmission component adopts unique intelligent communication chained technology-DRIVE-CLiQ, be used for connecting all component, thereby save the distribution time, reduce loaded down with trivial details manual input, realize networking debugging.This adjustment method is suitable for too for the frequency converter of other brands.
In order to shorten the debug time to frequency converter, reduce the problem and the fault that in debug process, occur, the embodiment of the present invention provides a kind of Frequency Drive adjustment method, divide three large modules, 13 steps altogether, referring to Fig. 1, first module is preliminary work before frequency converter debugging, and step is 101-105; Second module is frequency converter stand-alone debugging, and step is 201-206; The 3rd module is network debugging, and step is 301-302; Described below:
One, preliminary work before frequency converter debugging
101: adopt electric current and voltage method test stake resistance;
What adopt because frequency converter is inner is micromotor integrated circuit, high especially to the outside or inner interference requirement producing, must there is reliable ground connection in order to eliminate the interference of self and outside interference, and meet EMC standard, and grounding resistance should not be less than 1 ohm, the earth resistance of this method adopts the test of electric current and voltage method, utilizes ZC-8 type earth resistance tester, as shown in Figure 1.
When measurement of Grounding Resistance value, referring to Fig. 2, connect 5m wire according to the E terminal (connecing testee) in the regulation instrument of the mode of connection, P terminal (potential end) connects 20m line, C terminal (current terminal) connects 40m line, and the other end of wire meets respectively measured object earthing pole E ˊ, current potential probe P ˊ and electric current probe C ˊ, and E ˊ, P ˊ, C ˊ should keep straight line, its spacing is 20m.
102: motor is checked, adopt direct-flow double bridge testing of electric motors direct current resistance;
Motor inspection need be checked its capacity and the mode of connection, the capacity of motor need meet the capacity of frequency converter, the nameplate that records motor comprises that the rated capacity of motor, rated voltage, rated current, rated current, rated speed, wiring pattern and speed adjustable range are frequency range, and these master datas need input in " motor Optimization Steps 201 "; For technique, accurate or jumbo variable-frequency motor needs the direct current resistance of testing of electric motors, uses direct-flow double bridge testing of electric motors direct current resistance in this method; The insulation resistance that needs to check motor, its insulation resistance of low voltage motor should not be less than 0.5 megaohm, draws motor also should measure its winding phase insulation resistance for its asterism of star-like motor; Check the cable connection of motor, need fastening, in order to avoid large electric current and the heating that causes.
103: motor cable is tested;
The insulation resistance of test frequency-changing cable, uses the test of direct current megohmmeter, and the alternate and insulation against ground resistance value of cable is not less than 0.5 megaohm, when the insulation resistance of test cable, cable and frequency converter need be thrown off; Also need length and the direct current resistance of test cable for controlling the high occasion of technological requirement; Need guarantee ground connection core and screen layer reliable ground for special frequency-changing cable.
104: before frequency converter powers on, check;
Inspection before frequency converter powers on is a very important job, because device all likely occurred variety of issue in the process of transportation or assembling, therefore need to before powering on, do double check.(note: this step need be carried out the in the situation that of power-off) first needs to check frequency converter input major loop switch and fast molten whether intact, checks that whether whether the input of frequency converter and the wiring of output consistent with operation instructions; Whether incoming power electric pressure is consistent with frequency converter, impedance measurement between R, S, T, impedance between R/S/T and ground wire; Impedance between DC+ and DC-, impedance between DC+/DC-and ground wire; Impedance between R/S/T and DC+/DC-; Impedance measurement between U, V, W, impedance between U/V/W and ground wire; Impedance between U/V/W and DC+/DC-; The diode measurement of positive and negative test pencil between R/S/T and DC+/DC-; The diode measurement of positive and negative test pencil between U/V/W and DC+/DC-; Check that according to design circuit figure whether control panel wire jumper is correct: hardware-enabled wire jumper, analog signals type wire jumper, scrambler electric pressure wire jumper, code device signal line type wire jumper etc.By above-mentioned judge rectification and inversion module whether intact.
105: the empty examination in Frequency Converter Control loop;
After frequency converter powers on, need, according to design circuit figure, carry out analog space examination to control loop, test site control box, urgency stop interlocking with technique, according to the various possible functions of circuit diagram simulation, check that whether signal is normal, whether relay, contactor etc. can regular events.Relate to connection and the speed governing of pot analog input of multistage speed governing BICO for sintering machine control, therefore the correct operation of various signals will echo design concept figure.
Two, frequency converter stand-alone debugging
201: frequency converter motor is optimized;
Utilize the nameplate data in motor inspection and the test of recording in step 102, according to converter parameter table input master data, SINAMICS S120 defines in MOTOR DATA parameter group, afterwards frequency converter is carried out to static identification and Dynamic Identification (carrying out under the de-axle of unit), automatically to set up the various parameters of electric current loop in frequency converter inside; Because sintering machine motor has scrambler control, should carry out speed closed loop and automatically calculate various parameters, therefore the data of correct configuration codes device are very important.
202: parameter setting;
Frequency converter inside in the frequency converter motor optimization of some data in step 201 has calculated automatically, need to from parameter list, define polytechnic anxious stopping transportation and enter DI, define various DO outputs etc., but for the controls such as sintering machine more complicated just must input again correlation parameter, link by BICO, make this motor realize the control of 4 gears, to realize at a high speed, low speed, the technique such as rotate and reverse, and in the time running into the external faults such as non-shutdown, need to regulate at any time the speed of sintering machine time, can utilize pot analog quantity to carry out governing speed, therefore needing to set analog quantity channel realizes.Secondly, select control model, select V/F voltage-frequency control model for sintering machine; Last because sintering machine need to be realized brake hard in the situation that there is situation, therefore need in FUNCTION parameter options, define band-type brake.
203: unit no load test;
This step is still further test and the optimization to motor, need in the situation that taking off axle completely, motor carry out, after step " 202 parameter setting " completes, to the given relatively low rotating speed of frequency converter, 20% rated speed, by TRACE function, can check arbitrarily the various parametric lines in electric machine rotation process, and record, how in this step, need to determine the direction of motor, need mechanical technology personnel to confirm, for step " 301 network debugging " control word definition is prepared.
204: the test of band reductor;
This step is mainly to be had and be there is no stuck phenomenon by the variation test reductor of observation electric current, and tests other various parameters.
205: the empty examination of band sintering machine;
Its speed preset of first trial run for sintering machine need to be lower, in order to avoid there is phenomenon stuck or derailing in the process of test run, whether quick moves in the process in several cycles the isoparametric dynamic response of electric current at sintering machine, and whether operation is steady etc.
206: commissioning run test;
This step is that on-load has turned round for frequency converter, how therefore can observe in sintering machine unequally loaded situation the isoparametric dynamic response curve of electric current, and whether operation is steady etc., along with whether the increase feeding intake the phenomenons such as overcurrent can occur.
Three, network debugging
301: network parameter setting;
Realizing under the requirement of automatically controlling, need the s7-300PLC of SINAMICS S120 and sintering master-control room to carry out periodicity communication by PROFIBUS, in the time of host computer s7-300 configuration, DP address must be consistent with the address of frequency converter.By control word 1(CTW1) and main setting value (NSETP_B) be sent to frequency converter.In control word, Bit0 does the on off control of motor, and main setting value is speed setting value, and frequency setting value and actual value will be passed through standardization, can be in P2000 Standard modification frequency, reference frequency is 500HZ.Configuration is to select PZD=2, in PLC, can carry out data transmission with MOVE instruction, when configuration is selected PZD>2, can call SFC14 and SFC15 module is read and write in PLC.
302: host computer operation test run.
PLC is set and frequency converter can carry out communication by the network parameter in step 301, by the speed preset of host computer PLC, again sintering machine is carried out to test run, check that by host computer whether frequency converter feedback data is correct.
In sum, by this method, the only personnel through basic frequency conversion training are debugged rapidly to frequency converter, debug time is saved in the even special complexity debugging of technique simultaneously, reduces the problem and the fault that in debug process, occur.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. a Frequency Drive adjustment method, is characterized in that, said method comprising the steps of:
(1) adopt electric current and voltage method test stake resistance; Motor is checked, adopt direct-flow double bridge testing of electric motors direct current resistance; Motor cable is tested;
(2) frequency converter checks before powering on; The empty examination in Frequency Converter Control loop;
(3) frequency converter stand-alone debugging;
(4) network parameter setting; Host computer operation test run.
2. a kind of Frequency Drive adjustment method according to claim 1, is characterized in that, the step of described employing electric current and voltage method test stake resistance is specially:
The end E that connects testee connects 5m wire, and potential end P connects 20m wire, and current terminal C connects 40m wire, the other end of wire meets respectively measured object earthing pole E ˊ, current potential probe P ˊ and electric current probe C ˊ, and measured object ground connection E ˊ, current potential probe P ˊ, electric current probe C ˊ keep straight line, and spacing is 20m.
3. a kind of Frequency Drive adjustment method according to claim 1, is characterized in that, the step of described frequency converter stand-alone debugging is specially:
1) frequency converter motor is optimized;
2) parameter setting;
3) unit no load test;
4) band reductor test;
5) the empty examination of band sintering machine;
6) commissioning run test.
4. a kind of Frequency Drive adjustment method according to claim 3, is characterized in that, the operation of described unit no load test is specially:
To the rated speed of frequency converter given 20%, check arbitrarily the various parametric lines in frequency converter rotation process, and record.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104237691A (en) * | 2014-09-19 | 2014-12-24 | 四川长虹电器股份有限公司 | Debugging method of frequency converter |
| CN112067898A (en) * | 2020-08-13 | 2020-12-11 | 河钢股份有限公司承德分公司 | Grounding resistance measuring trolley |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237691A (en) * | 2014-09-19 | 2014-12-24 | 四川长虹电器股份有限公司 | Debugging method of frequency converter |
| CN112067898A (en) * | 2020-08-13 | 2020-12-11 | 河钢股份有限公司承德分公司 | Grounding resistance measuring trolley |
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Application publication date: 20140507 |