CN110401309A - A method of analysis DC motor control system failure cause - Google Patents
A method of analysis DC motor control system failure cause Download PDFInfo
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- CN110401309A CN110401309A CN201910643818.8A CN201910643818A CN110401309A CN 110401309 A CN110401309 A CN 110401309A CN 201910643818 A CN201910643818 A CN 201910643818A CN 110401309 A CN110401309 A CN 110401309A
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- motor
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- motor control
- control system
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Protection Of Generators And Motors (AREA)
Abstract
The invention discloses a kind of methods for analyzing DC motor control system failure cause, comprising: step 1: excluding motor wiring error problem；Step 2: excluding motor self problem；Step 3: excluding motor Insulation Problems；Step 4: excluding machine winding problem；Step 5: excluding loop fault problem；Step 6: excluding start-up resistor itself damages problem；Step 7: excluding the damage of the coils such as contactor, relay or the insecure problem of contact actuation.Effect of the invention is: the design of the invention is scientific and reasonable, it is easy to operate, to the last whole process for excluding DC motor control panel cabinet itself component failure since excluding direct current generator faults itself, clear thinking, stable operation is reliable, and energy is accurate, is quickly found failure cause, so that corresponding treatment measures are taken, to guarantee unit safety stable operation.It is practical applied to the accident analysis of thermal power plant DC motor control system, significant effect.
Description
Technical field
The invention belongs to electric machine control system accident analysis fields, are particularly suitable for DC motor control system failure point
Analysis is related to a kind of method for analyzing DC motor control system failure cause.
Background technique
Direct current generator has good mechanical property and governor control characteristics, and smooth speed control, stabilization, controllability be good, high reliablity
And overload capacity it is big, be able to bear the features such as frequent impact load, be widely used in thermal power plant lubricating oil, apical axis
Oil, Seal Oil and the inspection of boiler fire etc. are related to the critical system of unit safety.In unit running process, if there is steam turbine oil
System exchanges situations such as power loss or alternating current generator failure, and direct current generator automatically engages interlocking, avoids big axis, bearing shell, sealing etc.
Damage, it is ensured that steam turbine and engine health；Equally, in boiler running process, if there is event in exchange fire inspection cooling blower
Barrier or power loss and direct current fire inspection blower cannot normally put into, flame detecting probe, which may also damage because of overtemperature and may cause boiler, to stop
Furnace accident.
Can the direct current generator of each system in thermal power plant normally come into operation, and play to the operation in entire thermal power plant
Vital effect；And DC motor control system is as its crucial control axis, precise control and reliability and just
Normal running safety is just most important.In view of direct current generator reliability service to the important of each system in thermal power plant
Property, some problems, the failure that DC motor control system occurs in the operational process of thermal power plant, which carry out analysis, seems especially heavy
It wants.However at present the common failure analysis methods of those skilled in the art pass through mostly consult specification, maintenance handbook and often
See fault code etc., but different manufacturers have different user's manuals, content is also far from each other, and described phenomenon of the failure is equal
For primary fault, cannot extend efficient help in physical fault is analyzed and handled for us.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of analysis DC motor control system failures
Method, more accurate, the fast decision failure cause convenient for those skilled in the art, to instruct DC motor control system failure to ask
The processing of topic, to guarantee that unit safety is reliably run.
The purpose of the present invention is achieved through the following technical solutions:
A method of analysis DC motor control system failure cause, comprising: step 1: excludes motor wiring error and ask
Topic；Step 2: excluding motor self problem；Step 3: excluding motor Insulation Problems；Step 4: excluding machine winding problem；Step
Rapid five, loop fault problem is excluded；Step 6: excluding start-up resistor itself damages problem；Step 7: excluding contactor, relay
The damage of the coils such as device or contact are attracted insecure problem.
It is preferred that specific method for removing:
Step 1: failure caused by exclusion direct current generator self reason first disconnects direct current generator electrical source of power, motor control
Disk cabinet processed controls power supply, it is ensured that after electricity, unlocks direct current generator and control panel cabinet connecting cable, excludes motor wiring error and ask
Topic；
Step 2: carrying out visual examination to direct current generator；If well-tended appearance, with setting stick rotating motor bearing；If bearing rotates
Flexibly, without bite phenomenon, bearing housing is opened, fan is checked；If fan is intact, without bite phenomenon, exclude motor from
Body problem；
Step 3: unlocking connection sheet between machine winding, machine winding insulation against ground is tested using electronic megger, measures motor
Whether each winding insulation value meets the requirements, to exclude motor Insulation Problems；
Step 4: measured to each winding D.C. resistance value of motor, measure each winding resistance value and with monomer debugging test
Data and/or delivery test data compare, and have no significant difference, whether in regulation allowed band, to exclude machine winding
Problem；
Step 5: according to DC motor control disk cabinet loop diagram, component is checked one by one, excluding disk cabinet longtime running,
It because of situations such as superstructure loosenings such as line caused by the reasons such as vibration, aging, screws, falls off, and tight stubborn again, it is ensured that each component
It fastens and motor control loop line is correct, to exclude loop fault problem；
Step 6: checking motor three-level start-up resistor resistance values at different levels, check whether three-level resistance balances, to exclude to open
Dynamic resistance itself damages problem；
Step 7: closing control power supply, examination operation, stop button, each relay in sighting disk cabinet inside, contactor act feelings
Condition measures each element end voltage, checks whether each element manipulation is normal；It operates repeatedly several times, checks each member inside control loop
Whether part can normally start, if the phenomenon that not being attracted there are contactor, relay etc. by electric back contact；With exclude contactor,
The damage of the coils such as relay or contact are attracted insecure problem.
It is preferred that step 1 sequentially checks one by one to step 7, after checking problem, the checking step is determined
It for trouble node and repairs, tests motor whether normal operation after maintenance；If operated normally, failure reason analysis is whole
Only；If motor can't operate normally, the follow-on check step of trouble node is returned to, is continued checking.
It is preferred that when trouble node has been step 7, circulation executes step 1 to step 7, until checking
To DC motor control system failure.
It is preferred that being measured using double bridge or multimeter to each winding D.C. resistance value of motor.
It is preferred that electronic megger tests machine winding insulation against ground after being transferred to 500V grades.
The beneficial effects of the present invention are: the design of the invention is scientific and reasonable, and it is easy to operate, from exclusion direct current generator faults itself
Starting to the last whole process for excluding DC motor control panel cabinet itself component failure, clear thinking, stable operation is reliable,
And energy is accurate, is quickly found failure cause, so that corresponding treatment measures are taken, to guarantee unit safety stable operation.
It is practical applied to the accident analysis of thermal power plant DC motor control system, significant effect.
Detailed description of the invention
Fig. 1 is certain power plant's motor control loop schematic illustration.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing, but protection scope of the present invention is not limited to
It is as described below.
A method of analysis DC motor control system failure cause, comprising: step 1: excludes motor wiring error and ask
Topic；Step 2: excluding motor self problem；Step 3: excluding motor Insulation Problems；Step 4: excluding machine winding problem；Step
Rapid five, loop fault problem is excluded；Step 6: excluding start-up resistor itself damages problem；Step 7: excluding contactor, relay
The damage of the coils such as device or contact are attracted insecure problem.
In a preferred embodiment, specific method for removing:
Step 1: failure caused by exclusion direct current generator self reason first disconnects direct current generator electrical source of power, motor control
Disk cabinet processed controls power supply, it is ensured that after electricity, unlocks direct current generator and control panel cabinet connecting cable, excludes motor wiring error and ask
Topic；
Step 2: carrying out visual examination to direct current generator；If well-tended appearance, with setting stick rotating motor bearing；If bearing rotates
Flexibly, without bite phenomenon, bearing housing is opened, fan is checked；If fan is intact, without bite phenomenon, exclude motor from
Body problem；
Step 3: unlocking connection sheet between machine winding, machine winding insulation against ground is tested using electronic megger, measures motor
Whether each winding insulation value meets the requirements, to exclude motor Insulation Problems；
Step 4: measured to each winding D.C. resistance value of motor, measure each winding resistance value and with monomer debugging test
Data and/or delivery test data compare, and have no significant difference, whether in regulation allowed band, to exclude machine winding
Problem；
Step 5: according to DC motor control disk cabinet loop diagram, component is checked one by one, excluding disk cabinet longtime running,
It because of situations such as superstructure loosenings such as line caused by the reasons such as vibration, aging, screws, falls off, and tight stubborn again, it is ensured that each component
It fastens and motor control loop line is correct, to exclude loop fault problem；
Step 6: checking motor three-level start-up resistor resistance values at different levels, check whether three-level resistance balances, to exclude to open
Dynamic resistance itself damages problem；
Step 7: closing control power supply, examination operation, stop button, each relay in sighting disk cabinet inside, contactor act feelings
Condition measures each element end voltage, checks whether each element manipulation is normal；It operates repeatedly several times, checks each member inside control loop
Whether part can normally start, if the phenomenon that not being attracted there are contactor, relay etc. by electric back contact；With exclude contactor,
The damage of the coils such as relay or contact are attracted insecure problem.
In a preferred embodiment, step 1 sequentially checks one by one to step 7, after checking problem, determines the inspection
It looks into step to be trouble node and repair, tests motor whether normal operation after maintenance；If operated normally, failure cause point
Analysis terminates；If motor can't operate normally, the follow-on check step of trouble node is returned to, is continued checking.
In a preferred embodiment, when trouble node has been step 7, circulation executes step 1 to step 7, directly
To checking DC motor control system failure.
In a preferred embodiment, each winding D.C. resistance value of motor is surveyed using double bridge or multimeter
Amount.
In a preferred embodiment, machine winding insulation against ground is tested after electronic megger is transferred to 500V grades.
In a preferred embodiment, power plant, India 2 × 600MW engineering, every crew qiting have steam turbine direct current lubrication
Oil pump, direct current sealing oil pump, direct current jacking(oil) pump, small machine direct current emergency bearing oil pump and boiler direct current fire examine totally 6 direct currents such as blower
Motor, each 1, mating control panel cabinet of every direct current generator.During power plant #1 unit direct current generator commissioning test, find more
Platform DC motor control panel cabinet breaks down situation during trial operation, wherein #1 unit steam turbine direct current jacking(oil) pump A, B with
And there is the hot situation of resistance in the process of running in the control panel cabinet of #1 unit steam feed pump direct current emergency bearing oil pump A, B, very
It burns to the insulating layer for start-up resistor connecting cable head position inside control panel cabinet occur, smolder, start-up resistor is excessively hot
Phenomenon.
The unit just quickly finds #1 machine steam feed pump direct current emergency bearing oil pump A control using the method during test run
Disk cabinet failure cause processed, and take treatment measures to guarantee unit safety operation in time.Method for removing is as follows:
1, failure caused by direct current generator self reason is excluded first, disconnects direct current generator electrical source of power, motor control disk
Cabinet controls power supply, it is ensured that after electricity, direct current generator and control panel cabinet connecting cable (disk cabinet end and motor side) is unlocked, due to the electricity
Machine has operated normally repeatedly, can directly exclude motor wiring error problem.
2, visual examination, well-tended appearance are carried out to the motor；With setting stick rotating motor bearing, bearing is rotated flexibly, without bite
Phenomenon；Bearing housing is opened, fan is checked, fan is intact, without bite phenomenon；Exclude motor itself external issues.
3, connection sheet between machine winding is unlocked, using (500V grades) the test machine winding insulation against ground of electronic megger, through surveying
Amount each winding insulation value of motor is all larger than 1G Ω, meets regulatory requirements, and motor insulation is good, excludes motor Insulation Problems.
4, each winding D.C. resistance value of motor is measured using double bridge (or multimeter), measures each winding resistance value
Are as follows: E1E2=127.4 Ω, B1B2=2.37 Ω, D1D2=0.01 Ω, with initial monomer test data and delivery test data phase
Compare, no significant difference, in regulation allowed band, excludes machine winding problem.
5, after excluding direct current generator ontology problem, motor control disk cabinet controlling system is checked.The motor control
Circuit theory processed is as shown in Figure 1.It since the motor repeatedly operates normally, can determine that motor control loop line is correct, exclude
Circuit connection error problem.
6, according to loop diagram, component is checked one by one, and excluding disk cabinet longtime running is caused due to vibration, aging etc.
The superstructure loosenings such as line, screw, situations such as falling off, and tight again twist, it is ensured that each component fastening.
7, motor three-level start-up resistor resistance values at different levels are checked, on inspection: R1R2=0.87 Ω, R1R3=1.55 Ω, R1R4
=2.40 Ω, three-level resistance balance exclude start-up resistor itself and damage problem.
8, control power supply, examination operation, stop button are closed, each relay in sighting disk cabinet inside, contactor action situation are surveyed
Each element end voltage is measured, checks whether each element manipulation is normal.It operates repeatedly several times, each element energy inside discovery control loop road
Normal starting, but after actuation, it is found when cutting off start-up resistor through delay, contactor KM3 contact closure is unreliable.
9, KM3 is removed individually to be verified, after discovery KM3 coil electrification, contact movement, but closure is unreliable, has often
Contact does not reach a phenomenon and occurs, and learn in conjunction with control loop analysis: the closure just because of the contact KM3 is not in place, causes
Motor breaks down when cutting off three-level resistance through delay after series resistance normally starts, by the contact triggered third level electricity of KM3
Resistance can not by it is normal be shorted, excision, it is connecting cable fever, hot or even burn phenomenon so that resistance both ends be caused to charge for a long time,
And running current is compared with relatively low situation when operating normally, although motor can normally start, also can charging operation for a period of time,
But runing time is slightly long, just will appear disk cabinet internal resistance, cable burn observations.
10, after reason determines, KM3 contactor is replaced, re-starts splitting or integrating examination operation, measuring cell end voltage, each element
Normally, circuit operation is normal.
11, restore motor itself and motor to disk cabinet wiring.After the conditions such as confirmation system, safety meet, translator test run
Row.Then starting current 120A, running current 28A check that motor operation is normal for continuous operation 1 hour.
The design of the invention is scientific and reasonable, easy to operate, excludes direct current to last since excluding direct current generator faults itself
The whole process of motor control disk cabinet itself component failure, clear thinking, stable operation is reliable, and can precisely, rapidly
Failure cause is found, so that corresponding treatment measures are taken, to guarantee unit safety stable operation.It is applied to thermal power plant
DC motor control system accident analysis is practical, significant effect.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, it is noted that all
Made any modifications, equivalent replacements, and improvements etc. within the spirit and principles in the present invention should be included in guarantor of the invention
Within the scope of shield.
Claims (6)
1. a kind of method for analyzing DC motor control system failure cause characterized by comprising step 1: excluding motor
Wiring error problem；Step 2: excluding motor self problem；Step 3: excluding motor Insulation Problems；Step 4: excluding motor
Winding problem；Step 5: excluding loop fault problem；Step 6: excluding start-up resistor itself damages problem；Step 7: excluding
The damage of the coils such as contactor, relay or contact are attracted insecure problem.
2. a kind of method for analyzing DC motor control system failure cause according to claim 1, which is characterized in that tool
Body method for removing:
Step 1: failure caused by exclusion direct current generator self reason first disconnects direct current generator electrical source of power, motor control disk
Cabinet controls power supply, it is ensured that after electricity, unlocks direct current generator and control panel cabinet connecting cable, excludes motor wiring error problem；
Step 2: carrying out visual examination to direct current generator；If well-tended appearance, with setting stick rotating motor bearing；If bearing rotation flexibly,
Without bite phenomenon, bearing housing is opened, fan is checked；If fan is intact, without bite phenomenon, excludes motor itself and ask
Topic；
Step 3: unlock connection sheet between machine winding, machine winding insulation against ground is tested using electronic megger, measurement motor respectively around
Whether group insulation values meet the requirements, to exclude motor Insulation Problems；
Step 4: measured to each winding D.C. resistance value of motor, measure each winding resistance value and with monomer debugging test data
And/or delivery test data compare, and have no significant difference, whether in regulation allowed band, to exclude machine winding problem；
Step 5: according to DC motor control disk cabinet loop diagram, component is checked one by one, excluding disk cabinet longtime running, due to
The superstructure loosenings such as line caused by the reasons such as vibration, aging, screw, situations such as falling off, and tight again twist, it is ensured that each component fastening
And motor control loop line is correct, to exclude loop fault problem；
Step 6: checking motor three-level start-up resistor resistance values at different levels, check whether three-level resistance balances, to exclude starting electricity
Hinder itself damage problem；
Step 7: control power supply is closed, and examination operation, stop button, each relay in sighting disk cabinet inside, contactor action situation,
Each element end voltage is measured, checks whether each element manipulation is normal；It operates repeatedly several times, checks that each element is inside control loop
It is no normally to start, if the phenomenon that not being attracted there are contactor, relay etc. by electric back contact；To exclude contactor, relay
The damage of the coils such as device or contact are attracted insecure problem.
3. a kind of method for analyzing DC motor control system failure cause according to claim 1, it is characterised in that: step
Rapid one sequentially checks one by one to step 7, after checking problem, determines that the checking step is trouble node and repairs, ties up
Motor is tested whether normal operation after repairing；If operated normally, failure reason analysis is terminated；If motor can't be transported normally
Row, returns to the follow-on check step of trouble node, continues checking.
4. a kind of method for analyzing DC motor control system failure cause according to claim 3, it is characterised in that: when
When trouble node has been step 7, circulation executes step 1 to step 7, until checking DC motor control system failure.
5. a kind of method for analyzing DC motor control system failure cause according to claim 1, it is characterised in that: adopt
Each winding D.C. resistance value of motor is measured with double bridge or multimeter.
6. a kind of method for analyzing DC motor control system failure cause according to claim 1, it is characterised in that: electricity
Shake test machine winding insulation against ground after table is transferred to 500V grades.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910643818.8A CN110401309A (en) | 2019-07-17 | 2019-07-17 | A method of analysis DC motor control system failure cause |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910643818.8A CN110401309A (en) | 2019-07-17 | 2019-07-17 | A method of analysis DC motor control system failure cause |
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| CN110401309A true CN110401309A (en) | 2019-11-01 |
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| CN201910643818.8A Pending CN110401309A (en) | 2019-07-17 | 2019-07-17 | A method of analysis DC motor control system failure cause |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350529A (en) * | 2020-10-13 | 2021-02-09 | 深圳微米自动化科技有限公司 | Servo motor maintenance method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06233450A (en) * | 1993-02-04 | 1994-08-19 | Nippondenso Co Ltd | Fault detecting device for motor drive circuit |
| CN203630312U (en) * | 2014-01-08 | 2014-06-04 | 中煤能源黑龙江煤化工有限公司 | Direct current motor armature fault detection device |
-
2019
- 2019-07-17 CN CN201910643818.8A patent/CN110401309A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06233450A (en) * | 1993-02-04 | 1994-08-19 | Nippondenso Co Ltd | Fault detecting device for motor drive circuit |
| CN203630312U (en) * | 2014-01-08 | 2014-06-04 | 中煤能源黑龙江煤化工有限公司 | Direct current motor armature fault detection device |
Non-Patent Citations (2)
| Title |
|---|
| 李贵菊等: "直流电机故障诊断及保养分析", 《河北冶金》 * |
| 胡浩等: "直流电动机的故障分析与处理方法", 《电机技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350529A (en) * | 2020-10-13 | 2021-02-09 | 深圳微米自动化科技有限公司 | Servo motor maintenance method |
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Application publication date: 20191101 |