CN106405315A - Motor stator winding fault detection method - Google Patents
Motor stator winding fault detection method Download PDFInfo
- Publication number
- CN106405315A CN106405315A CN201610729991.6A CN201610729991A CN106405315A CN 106405315 A CN106405315 A CN 106405315A CN 201610729991 A CN201610729991 A CN 201610729991A CN 106405315 A CN106405315 A CN 106405315A
- Authority
- CN
- China
- Prior art keywords
- stator winding
- motor stator
- temperature
- detection method
- motor
- 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.)
- Granted
Links
- 238000004804 winding Methods 0.000 title claims abstract description 85
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000003466 welding Methods 0.000 claims abstract description 7
- 230000008439 repair process Effects 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 11
- 238000001931 thermography Methods 0.000 claims description 10
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 4
- 238000002372 labelling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 9
- 238000012545 processing Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000007935 neutral effect Effects 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000001757 thermogravimetry curve Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/0096—Radiation pyrometry, e.g. infrared or optical thermometry for measuring wires, electrical contacts or electronic systems
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J2005/0077—Imaging
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a motor stator winding fault detection method. A motor stator winding is electrified; at the same time, an infrared thermal imager is used to observe the stator winding, and further an infrared thermal image of the observed stator winding and a temperature distribution feature of the whole stator winding are obtained; according to a principle that the temperature a coil or coil assembly in which a fault lead is placed is higher or lower than that of other coils as well as an obtained observation result, the fault position is analyzed and determined. The method is mainly used to detect hidden winding faults as three-phase DC resistance imbalance caused by that a welding joint of the motor stator winding is fractured or has cracks, can confirm the position of the fault lead efficiently, visually and accurately without loss, and reduces the fault detecting and processing cost of a motor greatly.
Description
Technical field
The present invention relates to detection technique field, particularly machine winding fault detect and maintenance field.
Background technology
Machine winding breaks down, and for example three-phase resistance is uneven, is often as winding coil and conducting ring or on line
Between lead at have crackle or fracture caused by.In fault early stage, due to outer layer insulation parcel, it is intuitively accurately and nondestructively fixed to be difficult to
Position fault pin.Common practice is intended to cut off lead, then by measure D.C. resistance come by phase, by group, one by one go really
Determine fault pin position, but the follow-up reparation difficulty of such way is big, hidden danger is high.In many cases, done fault statistics and
After analysis, winding overall can pull out report from a liner and give up, and waste high.
In prior art, the Chinese invention patent of Application No. 201310727580.X discloses a kind of double-fed wind generating
Machine stator winding unbalanced fault detection method, by the current sensor of double-fed wind power generator rotor side, voltage sensor
Record rotor-side electric current, rotor-side voltage signal respectively；If judging to reach the sampling time, to the voltage signal collecting by line electricity
Pressure is converted into phase voltage；The electric current of every phase, voltage signal are multiplied and obtain the power signal of every phase；Every phase power letter by gained
Number corresponding addition obtains total three phase power signal；Total three phase power signal carries out Fourier transformation, obtains rotor-side power
Spectrogram；Extract 2f in spectrogram1The amplitude at place is as eigenvalue, f1For stator side electrical network fundamental frequency；Judge under electrical fault state
Eigenvalue whether more than 1.2-1.6 times of the eigenvalue under motor unfaulty conditions, if being more than, send fault alarm.Shen
Number please disclose a kind of Warm status monitoring method of generator of nuclear power station stator winding for the Chinese invention of 201210290203.X
And system, methods described includes：The leaving water temperature information of each stator bar that collection generator unit stator winding comprises；According to collection
To the leaving water temperature information of stator bar generate the radar map of the leaving water temperature information for showing described stator bar；Show
The radar map of the leaving water temperature for showing stator bar of described generation.Above prior art all can not solve prior art and deposit
Motor stator winding fault detection accuracy low, efficiency is low, winding is damaged and big, follow-up repairs difficult technical problem.
Content of the invention
The technical problem to be solved is to provide a kind of motor stator winding fault detection method, and it can solve
The accuracy of detection that certainly prior art exists is low, efficiency is low, it is big that winding is damaged, subsequently repair difficult technical problem.
The technical scheme is that：A kind of motor stator winding fault detection method, to motor stator winding energising；Logical
While electric, using infrared thermography, stator winding is observed, thus obtaining the infrared chart being observed stator winding
Picture and the Characteristics of The Distribution of Temperature of whole stator winding；More inclined than the temperature of other coils according to fault pin place coil or coil group
High or low principle and the observed result obtaining, analyze and determine trouble location.
When being energized to motor stator winding, electric current for 4 times during empty load of motor or more than 4 times and is less than 6 times.
Temperature field film viewing screen using infrared thermography is intuitively observed to stator winding and records whole stator
The Characteristics of The Distribution of Temperature of winding.
Described thermal-induced imagery includes the thermal-induced imagery being observed stator winding lead pad and corresponding coil.
Described stator winding faults are recessive winding failure, and described recessiveness winding failure is motor stator winding to be drawn because of coil
Rupture or crackle and outward appearance is without exception and the three-phase dc resistance unbalance that causes in wire bonding joint.
Described motor is phase asynchronous traction motor；Described motor stator winding fault detection method includes as follows
Step：
A：Motor stator winding is energized according to normal occupation mode, electrical current is more than or equal to 4 times of no-load test electric currents；
B：While energising, with infrared thermography, stator winding is carried out with real-time monitored, obtain the infrared chart of stator winding
Picture, observes the temperature change at each position of stator winding；
C：Under 4 times of no-load test electric currents or the locked rotor test function of current, stator winding lead pad place end turn
Thermal-induced imagery progressively distinguishes high temperature and low temperature position；The degree of unbalancedness of motor stator three-phase dc resistance is bigger, is reflected in
Temperature difference on thermal-induced imagery is bigger；
D：Record the Characteristics of The Distribution of Temperature of whole stator winding, according to fault pin place coil or the more other coil of coil group
Temperature drift or low principle and the observational record result obtaining, analyze and determine fault pin, find out temperature drift or
Low pad and corresponding coil；
E：Carry out labelling on temperature drift or low pad and corresponding coil, subsequently to tear open insulating at this pad
Remove, carry out repair welding or other repairs.
In step A, electrical current size is more than or equal to 4 times and to be less than 6 times of no-load test electric currents, and conduction time does not surpass
Spend 1 minute.
The present invention is mainly in order to detect motor stator winding because rupturing at coil welding point or crackle（Outward appearance is as good as
Often）And the recessiveness winding failure such as three-phase dc resistance unbalance causing is it is also possible to be used for other similar situations；The method can be high
Imitate, intuitively, accurately, nondestructively confirm fault pin position, the cost of electrical fault detection and process can be greatly reduced.Using
The present invention, can solve the problem that the accuracy of detection that prior art exists is low, efficiency is low, winding is damaged with skill big, that follow-up reparation is difficult
, particularly can be lead crackle or fracture defect early stage in art problem, intuitively accurately and nondestructively positioning failure lead, significantly
Reduce follow-up reparation difficulty and reduce hidden danger, practicality is extremely strong.
Brief description
Fig. 1 is the motor stator winding pad schematic diagram in the present invention；
In figure word and letter, numeral combination（W2 is upper, under U2, V4 is upper, under W4, U6 is upper, under V6, W8 is upper, under U8, V10 is upper, W10
Under, U12 is upper, under V12, in 1, in 3, in 5, in 7, in 9 and in 11）It is corresponding pad code name, pad is little with black
Round dot represents.W, V, U are motor three-phase windings and lead-out wire code name, herein the corresponding return rings of main acute pyogenic infection of finger tip W, V, U, that is,
Outmost three large circles（Innermost annulus is neutral ring, with " in " represent）, the generation of all pads being attached thereto
Number initial is corresponding ring code name.Digitized representation pad position in clock plane（Corresponding clock numeral）." on " and
D score represents locus in core slots for the pad place coil, i.e. upper coil and inner coil can be default.Neutral ring
Pad, such as in 7, in figure includes two pads, and actually this two pads are welded to together, and material object is in appearance
A pad, thus with 7 this code name to represent, other neutral boxing contacts（In 1, in 3, in 5, in 9, in 11）'s
Method for expressing with 7 identical.One complete pad is by ring code name addend word（" on ", D score generally can omit）Represent, example
As U6（On）Pad, refers to U ring in 6 o'clock direction（Upper strata sideline is enclosed）Pad.
Specific embodiment
A kind of motor stator winding fault detection method, to motor stator winding energising（When electric current is about unloaded 4 times）,
According to fault pin place coil or coil group compared with remaining coil temperature anomaly（Usually higher, lead rupture completely after because
No current is by low for temperature）, intuitively, fast observed using the temperature field film viewing screen of infrared thermography and record whole
The Characteristics of The Distribution of Temperature of winding, and then fault pin is analyzed and judges.
Thermal infrared imager is to be divided using the infrared energy that Infrared Detectorss and optical imagery object lens accept measured target
Cloth figure reflects on the light-sensitive element of Infrared Detectorss, thus obtaining Infrared Thermogram, this thermography and body surface
Heat distribution field is corresponding.I.e.：Thermal infrared imager is exactly that the invisible infrared energy sending object is changed into visible thermal image.
Different colours above thermal image represent the different temperatures of testee.
The present invention is described further with specific embodiment below in conjunction with the accompanying drawings.
Refer to Fig. 1, motor stator winding pad is distributed as shown in figure stain, pad（I.e. lead pad）It is
Lead and the intersection point of annulus., when its three-phase dc resistance unbalance degree surpasses taking a kind of phase asynchronous traction motor as a example
Cross the 2% of its meansigma methods, and when outward appearance cannot judge abort situation, fault location can be carried out according to the following steps：By motor stator around
Group is energized according to normal occupation mode, uses the temperature change at each position of infrared thermography Real Time Observation winding simultaneously.In 4 times of skies
Carry under test current or the locked rotor test function of current（Current parameters can voluntarily be adjusted, but does not exceed 6 times of no-load test electric currents,
And conduction time was no more than 1 minute）, the thermal-induced imagery of stator winding lead pad place end turn can progressively distinguish
Go out high/low temperature position.With under the normal conditions not broken down, the temperature of stator winding lead pad and place coil is normal
Temperature, exceeding this normal temperature is high temperature（I.e. temperature drift）, it is low temperature less than this normal temperature（I.e. temperature is low）.Motor is fixed
The degree of unbalancedness of sub- three-phase dc resistance is bigger, and the temperature difference being reflected on thermal-induced imagery is bigger.Weldering in temperature anomaly
Carry out labelling on contact and corresponding coil, subsequently insulation at this pad can be removed, carry out repair welding or other repairs.
Compared with prior art, when the above-mentioned fault of appearance（Three-phase dc resistance unbalance）When, prior art is common to be done
Method is to cut off lead, then by measure D.C. resistance come by phase, by group, one by one go to determine fault pin position, with reference to Fig. 1
Understand, because pad is numerous and distribution situation is complicated, according to the way of above prior art, follow-up reparation difficulty is big, hidden
Suffer from high, in many cases, after having done fault statistics and analysis, stator winding overall can pull out report from a liner and give up, and waste high.And adopt
The present invention is detecting motor stator winding because rupturing at coil welding point or crackle especially outward appearance without exception and cause
The recessive winding failure such as three-phase dc resistance unbalance it is not necessary to cut off lead it is not required that by measure D.C. resistance
By phase, by group, one by one go to determine fault pin position, but by adopting infrared thermal imaging while to stator winding electrifying
Instrument obtaining thermal-induced imagery, and and then analyze and determine fault pin position, can directly perceived, accurately, efficiently, nondestructively confirm therefore
Barrier wire locations, can solve the problem that the accuracy of detection that prior art exists is low, efficiency is low, it is big that winding is damaged, it is difficult subsequently to repair
Technical problem, particularly in lead crackle or fracture defect early stage, can accurately and nondestructively positioning failure lead directly perceived, significantly
Reduction is follow-up to repair difficulty and reduces hidden danger, prevents stator winding from integrally pulling out the appearance of the useless phenomenon of report from a liner, it is to avoid to waste, significantly drop
Low machine winding trouble shoot and the cost processing.The present invention passes through using the above-mentioned technical scheme different from prior art, takes
Obtained the technique effect being much better than prior art.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., be all contained within protection scope of the present invention.
Claims (7)
1. a kind of motor stator winding fault detection method, is characterized in that, to motor stator winding energising；While energising, adopt
With infrared thermography, stator winding is observed, thus obtain being observed the thermal-induced imagery of stator winding and whole stator
The Characteristics of The Distribution of Temperature of winding；According to fault pin place coil or coil group than other coils temperature drift or low former
Reason and the observed result obtaining, analyze and determine trouble location.
2. motor stator winding fault detection method according to claim 1, is characterized in that, to motor stator winding energising
When, electric current for 4 times during empty load of motor or more than 4 times and is less than 6 times.
3. motor stator winding fault detection method according to claim 1, is characterized in that, using infrared thermography
Temperature field film viewing screen is intuitively observed to stator winding and records the Characteristics of The Distribution of Temperature of whole stator winding.
4. motor stator winding fault detection method according to claim 1, is characterized in that, described thermal-induced imagery includes
It is observed stator winding lead pad and the thermal-induced imagery of corresponding coil.
5. motor stator winding fault detection method according to claim 1, is characterized in that, described stator winding faults are
Recessive winding failure, described recessiveness winding failure is motor stator winding because rupturing at coil lead welding point or crackle
And outward appearance is without exception and the three-phase dc resistance unbalance that causes.
6. motor stator winding fault detection method according to claim 1, is characterized in that, described motor is three-phase alternating current
Asynchronous traction motor；Described motor stator winding fault detection method comprises the steps：
A：Motor stator winding is energized according to normal occupation mode, electrical current is more than or equal to 4 times of no-load test electric currents；
B：While energising, with infrared thermography, stator winding is carried out with real-time monitored, obtain the infrared chart of stator winding
Picture, observes the temperature change at each position of stator winding；
C：Under 4 times of no-load test electric currents or the locked rotor test function of current, stator winding lead pad place end turn
Thermal-induced imagery progressively distinguishes high temperature and low temperature position；The degree of unbalancedness of motor stator three-phase dc resistance is bigger, is reflected in
Temperature difference on thermal-induced imagery is bigger；
D：Record the Characteristics of The Distribution of Temperature of whole stator winding, according to fault pin place coil or the more other coil of coil group
Temperature drift or low principle and the observational record result obtaining, analyze and determine fault pin, find out temperature drift or
Low pad and corresponding coil；
E：Carry out labelling on temperature drift or low pad and corresponding coil, subsequently to tear open insulating at this pad
Remove, carry out repair welding or other repairs.
7. motor stator winding fault detection method according to claim 6, is characterized in that,
In step A, electrical current size is more than or equal to 4 times and to be less than 6 times of no-load test electric currents, and conduction time is less than 1
Minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610729991.6A CN106405315B (en) | 2016-08-26 | 2016-08-26 | A kind of motor stator winding fault detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610729991.6A CN106405315B (en) | 2016-08-26 | 2016-08-26 | A kind of motor stator winding fault detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106405315A true CN106405315A (en) | 2017-02-15 |
| CN106405315B CN106405315B (en) | 2019-02-19 |
Family
ID=58004884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610729991.6A Active CN106405315B (en) | 2016-08-26 | 2016-08-26 | A kind of motor stator winding fault detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106405315B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037305A (en) * | 2017-03-15 | 2017-08-11 | 江苏大学 | A kind of bearing-free motor suspending windings fault detection method |
| CN108712135A (en) * | 2018-08-24 | 2018-10-26 | 海盐新跃电器有限公司 | A kind of anti-dieback protection circuit of pressure table motor |
| CN109391075A (en) * | 2017-08-10 | 2019-02-26 | 广东核电合营有限公司 | A kind of nuclear power plant's generator outlet warehouse and its temperature monitoring method |
| CN110531258A (en) * | 2019-07-15 | 2019-12-03 | 乌江渡发电厂 | The fault detection method of stator coil in a kind of power plants generating electricity unit |
| CN111922547A (en) * | 2020-07-27 | 2020-11-13 | 苏州索尔达动力科技有限公司 | System and method for detecting and evaluating welding quality of flat copper wire stator welding end |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759325A (en) * | 2003-03-12 | 2006-04-12 | 西门子公司 | Laminated core testing device |
| CN101750148A (en) * | 2009-12-31 | 2010-06-23 | 贵阳新光电气有限公司 | On-line monitoring and positioning method for temperature of junction plates of pole coil of rotor of electric generator |
| CN102608528A (en) * | 2011-12-01 | 2012-07-25 | 华南理工大学 | Defect detection method and device for motors |
| CN103018277A (en) * | 2011-09-22 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | Non-destructive evaluation of welded joints of bar wound stator utilizing infrared and thermal methods |
-
2016
- 2016-08-26 CN CN201610729991.6A patent/CN106405315B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759325A (en) * | 2003-03-12 | 2006-04-12 | 西门子公司 | Laminated core testing device |
| CN101750148A (en) * | 2009-12-31 | 2010-06-23 | 贵阳新光电气有限公司 | On-line monitoring and positioning method for temperature of junction plates of pole coil of rotor of electric generator |
| CN103018277A (en) * | 2011-09-22 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | Non-destructive evaluation of welded joints of bar wound stator utilizing infrared and thermal methods |
| CN102608528A (en) * | 2011-12-01 | 2012-07-25 | 华南理工大学 | Defect detection method and device for motors |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037305A (en) * | 2017-03-15 | 2017-08-11 | 江苏大学 | A kind of bearing-free motor suspending windings fault detection method |
| CN109391075A (en) * | 2017-08-10 | 2019-02-26 | 广东核电合营有限公司 | A kind of nuclear power plant's generator outlet warehouse and its temperature monitoring method |
| CN108712135A (en) * | 2018-08-24 | 2018-10-26 | 海盐新跃电器有限公司 | A kind of anti-dieback protection circuit of pressure table motor |
| CN110531258A (en) * | 2019-07-15 | 2019-12-03 | 乌江渡发电厂 | The fault detection method of stator coil in a kind of power plants generating electricity unit |
| CN111922547A (en) * | 2020-07-27 | 2020-11-13 | 苏州索尔达动力科技有限公司 | System and method for detecting and evaluating welding quality of flat copper wire stator welding end |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106405315B (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106405315A (en) | Motor stator winding fault detection method | |
| Albright | Interturn short-circuit detector for turbine-generator rotor windings | |
| Mohammed et al. | Stator winding fault thermal signature monitoring and analysis by in situ FBG sensors | |
| CN102928742B (en) | Infrared image automatic fault identifying method for high-voltage equipment | |
| US8536839B2 (en) | Device and method for monitoring and/or analyzing rotors of electric machines in operation | |
| Cardoso et al. | Rotor cage fault diagnosis in three-phase induction motors, by Park's vector approach | |
| EP3480610B1 (en) | Diagnosing a winding set of a stator | |
| CN103926510A (en) | Current and carrying capacity online monitoring and fault diagnosing and locating method for cable protection layer | |
| CN206975158U (en) | A kind of detection means of generator rotor interturn short-circuit situation | |
| US6791351B2 (en) | Electromagnetic stator insulation flaw detector | |
| US6903556B2 (en) | Method and apparatus for testing laminated cores of electrical machines | |
| CN206226220U (en) | Motor gas-gap early warning system | |
| EP2511722B1 (en) | Online monitoring system and method to identify shorted turns in a field winding of a rotor | |
| EP3126856B1 (en) | System and method for detecting, localizing and quantifying excess voltage drop in three-phase ac circuits | |
| CN103148928A (en) | Generator stator end winding degradation diagnosis method based on correlation analysis of electrical quantities and mechanical quantities | |
| CN105024595B (en) | A kind of brshless DC motor failure monitoring method and device | |
| JP6231110B2 (en) | Partial discharge measurement method and high-voltage equipment inspected using it | |
| Maughan et al. | Advances in motor and generator rotor health | |
| CN107340468A (en) | A kind of high voltage isolator detecting system | |
| KR101886192B1 (en) | Apparatus for diagnosing a power transformer | |
| US20160018467A1 (en) | Method and system for the detection and diagnosis of faults in running electric machines | |
| Verginadis et al. | Diagnosis of stator faults in synchronous generators: Short review and practical case | |
| CN111562450B (en) | System and method for monitoring service life of reactor | |
| CN104458294B (en) | A kind of fault monitoring method of train detection equipment and system | |
| CN105066368B (en) | Failure monitoring device and method, air-conditioner set and air-conditioning |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |