CN105676127A - Fault detection method and device for asynchronous motor - Google Patents

Fault detection method and device for asynchronous motor Download PDF

Info

Publication number
CN105676127A
CN105676127A CN201610034719.6A CN201610034719A CN105676127A CN 105676127 A CN105676127 A CN 105676127A CN 201610034719 A CN201610034719 A CN 201610034719A CN 105676127 A CN105676127 A CN 105676127A
Authority
CN
China
Prior art keywords
fault
asynchronous motor
detection coil
motor
plusminus
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.)
Pending
Application number
CN201610034719.6A
Other languages
Chinese (zh)
Inventor
鲍晓华
王汉丰
杨帆
张程
胡云鹏
吴长江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei University of Technology
Original Assignee
Hefei University of Technology
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hefei University of Technology filed Critical Hefei University of Technology
Priority to CN201610034719.6A priority Critical patent/CN105676127A/en
Publication of CN105676127A publication Critical patent/CN105676127A/en
Pending legal-status Critical Current

Links

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
    • G01R31/34—Testing dynamo-electric machines
    • 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
    • G01R31/346—Testing of armature or field windings
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention discloses a fault detection method for an asynchronous motor, and the method is used to accurately and rapidly determine faults including stator winding short circuit, rotor bar breaking and eccentric air gap of the asynchronous motor. A detection coil is placed in the tooth portion of certain stator of the motor to measure the air gap magnetic field of the corresponding position indirectly, a signal measuring and analyzing unit carries out spectrum analysis on inductive voltages at the two ends of the detection coil, and the fault type of the asynchronous motor is determined. The fault type can be timely detected at initial stage of the fault, guidance is provided for maintenance, maintenance time is reduced, and timely maintenance can reduce loss in the production process caused by the motor fault.

Description

A kind of method detecting asynchronous motor fault and device thereof
Technical field
The present invention relates to fault detection technique field, specifically a kind of method detecting asynchronous motor fault and device thereof.
Background technology
Asynchronous motor, owing to having simple in construction, the series of advantages such as easily manufactured, reliable, cheap, is applied widely in industrial or agricultural, transportation, national defense industry and other all trades and professions. Owing to asynchronous motor is widely applied, using environment different, load characteristic is also not quite similar, and electrical fault happens occasionally, and the asynchronous motor run in the occasion that particularly some running environment are severe, load shock is very big, fault rate is higher. Asynchronous motor fault causes its penalty, can be out of service time serious, affects production process. Especially under the production environment of Present Attitude automatization, the economic loss that electrical fault is brought is significantly larger than itself cost. In order to ensure motor and the reliability service of driven load, detect that electrical fault is significant for maintenance time with shortening for providing maintenance direction suggestion in time.
In asynchronous motor, stator winding inter-turn short circuit fault, rotor bar or end ring fracture and air gap eccentric centre are common fault types. For these faults, a lot of scholars have done big quantity research, but there are disadvantages that, as follows:
1, it is only be analyzed and detection for a kind of fault, it is impossible to detect various faults type by a kind of method simultaneously;
2, most common method is current status monitoring method, but current detection signal is fainter sometimes, and the impact coordinated with rotor bar number by stator winding number of pole-pairs when detecting air-gap eccentric fault, is not particularly suited for the asynchronous motor of all structures;
3, vibration detection method, is subject to external environmental interference.
Any electrical fault all can cause the change of air-gap field and the information comprised more horn of plenty, therefore can detect malfunction by research air-gap field characteristic.
Summary of the invention
The present invention is the weak point in order to overcome prior art to exist, a kind of method detecting asynchronous motor fault and device thereof, to can accurately and quickly judge the fault type of asynchronous motor, thus ensureing the properly functioning of asynchronous motor.
The present invention solves that technical problem adopts the following technical scheme that
The feature of a kind of method detecting asynchronous motor fault of the present invention is to carry out as follows:
Step, size according to the stator tooth of asynchronous motor, utilize one m circle detection coil of enamel-covered wire coiling;
Step, by described m circle detect coil be enclosed within any one stator tooth;
Step, by after described placement detection coil two lead ends draws from rosette, and for detection coil voltage signal measure and spectrum analysis;
Step, acquisition detect the induced voltage spectrogram at coil two ends, and judge whether described voltage signal exists corresponding characteristic frequency according to described voltage spectrum figure; If existing characteristics frequency, then it represents that described asynchronous motor exists fault; Described fault includes:
If described characteristic frequency meets formula (1), then it represents that the fault type of asynchronous motor (1) is stator winding inter-turn short circuit fault fault;
f s = [ n p ( 1 - s ) ± k ] f 1 - - - ( 1 )
In formula (1), f1For power supply fundamental frequency, s is revolutional slip, and p is the number of pole-pairs of asynchronous motor, and n represents natural number, and k represents odd number;
If described characteristic frequency meets formula (2), then it represents that the fault type of asynchronous motor is rotor broken bar or end ring fracture defect;
f b = [ k p ( 1 - s ) ± n s ] f 1 - - - ( 2 )
If described characteristic frequency meets formula (3), then it represents that the fault type of asynchronous motor is fault of eccentricity;
f e = [ ( n R ± n d ) 1 - s p ± k ] f 1 - - - ( 3 )
In formula (3), nd=0 represents static eccentric; nd≠ 0 represents dynamically eccentric;
If described characteristic frequency meets formula (3) and formula (4), then it represents that the fault type of asynchronous motor is fault of eccentricity;
f e ′ = | 1 ± n 1 - s p | f 1 - - - ( 4 ) .
The feature of the method for detection asynchronous motor fault of the present invention lies also in, and described detection coil (6), for the motor gas-gap magnetic field time-domain signal at approximate measure self position place, produces voltage signal with described motor-field time-domain signal.
A kind of device detecting asynchronous motor fault of the present invention, including asynchronous motor, rosette, signal measurement and analytic unit and display screen, is characterized in,
Any one stator tooth of described asynchronous motor is nested with a m circle detection coil;
Two lead ends of the detection coil after described placement are drawn from rosette, and accesses in described signal measurement and analytic unit;
Utilize the voltage signal measurement to detection coil of described signal measurement and analytic unit and spectrum analysis, it is thus achieved that the induced voltage spectrogram at detection coil two ends;
Judge whether described voltage signal exists corresponding characteristic frequency according to described voltage spectrum figure; If existing characteristics frequency, then it represents that described asynchronous motor exists fault; Described fault includes: stator winding inter-turn short circuit fault fault, rotor broken bar or end ring fracture defect, fault of eccentricity.
Compared with the prior art, the present invention has the beneficial effect that:
1, the present invention is by placing detection coil in asynchronous motor stator teeth portion, utilize its two ends induced voltage signal can detect stator winding inter-turn short circuit fault, rotor bar or end ring fracture, three kinds of faults of air gap eccentric centre simultaneously, having expanded a kind of method and only detected the scope of a kind of fault, practicality and economy are greatly improved;
2, to detect the coil two ends corresponding fault characteristic frequency of induced voltage signal more significantly for the present invention, it is easy to observation;
3, the present invention carrys out failure judgement type by indirect monitoring air-gap field, and signal is not by external environmental interference, and the information obtained is reliably accurate;
4, the invention belongs to online detection, it is to avoid the loss that motor stopping causes;
5, the present invention can detect it is which kind of fault in time at the fault initial stage, and this provides for maintenance and instructs and reduce corresponding maintenance time, the loss that maintenance reduction brings to production process due to electrical fault in time.
Accompanying drawing explanation
Fig. 1 is whole detection device schematic diagram of the present invention;
Fig. 2 is that the present invention detects coil distribution schematic diagram;
Number in the figure: 1 asynchronous motor, 2 rosettees, 3 signal measurements and analytic unit, 4 display screens, 5 stators, 6 detection coils; 7 stator tooths.
Detailed description of the invention
The present embodiment adopts the asynchronous motor 1 with cage rotor structure. Cast-aluminum rotor, copper bar, copper coin rotor, as long as meeting mouse cage type structure. Asynchronous motor 1 includes: rotor, stator 5 and rosette 2.
A kind of method detecting asynchronous motor fault is to carry out as follows:
Step 1, size according to the stator tooth 7 of asynchronous motor 1, utilize one m circle detection coil 6 of enamel-covered wire coiling; Consider certainty of measurement and stator copper factor, it is determined that wire diameter and m size; Select the enamel-covered wire of certain wire diameter, due to detection coil 6 two ends open circuit, it does not have electric current, only having induced voltage, it is contemplated that copper factor, wire diameter is the smaller the better, but in reality, the enamel-covered wire of little wire diameter is easily broken in placement process, therefore select suitable wire diameter according to practical situation; Utilizing Ansoftmaxwell finite element software, analogue simulation determines the size of detection coil 6 two ends induced voltage under the different number of turn, then considers the precision of measurement device, stator copper factor, it is determined that coil turn m;
Step 2 is as in figure 2 it is shown, detect coil 6 by m circle and be enclosed within any one stator tooth 7; According to practical situation, in order to easy to operate, it is possible to carried out this operation before or after placing winding; Between detection coil and stalloy, stator winding, all useful insulating paper separates, it is prevented that short circuit; It after coil placed, is done voltge surge and tests by detection, is not damaged guaranteeing that it insulate in installation process; For the asynchronous motor that stator is closed slot, the technique of threading can be adopted to realize this step.
Step 3, by place after detection coil 6 two lead ends draws from rosette, and for detection coil 6 voltage signal measure and spectrum analysis; Detection coil 6, for the motor gas-gap magnetic field time-domain signal at approximate measure self position place, produces voltage signal with motor-field time-domain signal.
Step 4, acquisition detect the induced voltage spectrogram at coil 6 two ends, and judge whether voltage signal exists corresponding characteristic frequency according to voltage spectrum figure; If existing characteristics frequency, then it represents that asynchronous motor 1 exists fault; Fault includes:
If characteristic frequency meets formula (1), then it represents that the fault type of asynchronous motor 1 is stator winding inter-turn short circuit fault fault;
f s = [ n p ( 1 - s ) ± k ] f 1 - - - ( 1 )
In formula (1), f1For power supply fundamental frequency, s is revolutional slip, and p is the number of pole-pairs of asynchronous motor 1, and n represents natural number, and k represents odd number;
If characteristic frequency meets formula (2), then it represents that the fault type of asynchronous motor 1 is rotor broken bar or end ring fracture defect;
f b = [ k p ( 1 - s ) ± n s ] f 1 - - - ( 2 )
If characteristic frequency meets formula (3), then it represents that the fault type of asynchronous motor 1 is fault of eccentricity;
f e = [ ( n R ± n d ) 1 - s p ± k ] f 1 - - - ( 3 )
In formula (3), nd=0 represents static eccentric; nd≠ 0 represents dynamically eccentric;
If characteristic frequency meets formula (3) and formula (4), then it represents that the fault type of asynchronous motor 1 is fault of eccentricity;
f e ′ = | 1 ± n 1 - s p | f 1 - - - ( 4 ) .
As it is shown in figure 1, a kind of device detecting asynchronous motor fault, including asynchronous motor 1, rosette 2, signal measurement and analytic unit 3 and display screen 4;
As in figure 2 it is shown, be nested with a m circle detection coil 6 on any one stator tooth 7 of asynchronous motor 1; Consider certainty of measurement and stator copper factor, it is determined that wire diameter and m size; Select the enamel-covered wire of certain wire diameter, due to detection coil 6 two ends open circuit, it does not have electric current, only having induced voltage, it is contemplated that copper factor, wire diameter is the smaller the better, but in reality, the enamel-covered wire of little wire diameter is easily broken in placement process, therefore select suitable wire diameter according to practical situation;Utilizing Ansoftmaxwell finite element software, analogue simulation determines the size of detection coil 6 two ends induced voltage under the different number of turn, then considers the precision of measurement device, stator copper factor, it is determined that coil turn m; According to practical situation, in order to easy to operate, it is possible to carried out this operation before or after placing winding; Between detection coil and stalloy, stator winding, all useful insulating paper separates, it is prevented that short circuit; It after coil placed, is done voltge surge and tests by detection, is not damaged guaranteeing that it insulate in installation process; For the asynchronous motor that stator is closed slot, the technique of threading is adopted to be wound on by coil on stator tooth 7;
Two lead ends detecting coil 6 after placing are drawn from rosette 2, and accesses in signal measurement and analytic unit 3;
Utilize the voltage signal measurement to detection coil 6 of signal measurement and analytic unit 3 and spectrum analysis, it is thus achieved that the induced voltage spectrogram at detection coil 6 two ends;
Judge whether voltage signal exists corresponding characteristic frequency according to voltage spectrum figure; If existing characteristics frequency, then it represents that asynchronous motor 1 exists fault; Fault includes: stator winding inter-turn short circuit fault fault, rotor broken bar or end ring fracture defect, fault of eccentricity.

Claims (3)

1. the method detecting asynchronous motor fault, is characterized in that carrying out as follows:
Step 1, size according to the stator tooth (7) of asynchronous motor (1), utilize one m circle detection coil (6) of enamel-covered wire coiling;
Step 2, by described m circle detect coil (6) be enclosed within any one stator tooth (7);
Step 3, two lead ends of the detection coil (6) after described placement are drawn from rosette, and for the voltage signal measurement of detection coil (6) and spectrum analysis;
Step 4, acquisition detect the induced voltage spectrogram at coil (6) two ends, and judge whether described voltage signal exists corresponding characteristic frequency according to described voltage spectrum figure; If existing characteristics frequency, then it represents that described asynchronous motor (1) exists fault; Described fault includes:
If described characteristic frequency meets formula (1), then it represents that the fault type of asynchronous motor (1) is stator winding inter-turn short circuit fault fault;
f s = [ n p ( 1 - s ) ± k ] f 1 - - - ( 1 )
In formula (1), f1For power supply fundamental frequency, s is revolutional slip, and p is the number of pole-pairs of asynchronous motor (1), and n represents natural number, and k represents odd number;
If described characteristic frequency meets formula (2), then it represents that the fault type of asynchronous motor (1) is rotor broken bar or end ring fracture defect;
f b = [ k p ( 1 - s ) ± n s ] f 1 - - - ( 2 )
If described characteristic frequency meets formula (3), then it represents that the fault type of asynchronous motor (1) is fault of eccentricity;
f e = [ ( n R ± n d ) 1 - s p ± k ] f 1 - - - ( 3 )
In formula (3), nd=0 represents static eccentric; nd≠ 0 represents dynamically eccentric;
If described characteristic frequency meets formula (3) and formula (4), then it represents that the fault type of asynchronous motor (1) is fault of eccentricity;
f e ′ = | 1 ± n 1 - s p | f 1 - - - ( 4 ) .
2. the method for detection asynchronous motor fault according to claim 1, it is characterized in that, described detection coil (6), for the motor gas-gap magnetic field time-domain signal at approximate measure self position place, produces voltage signal with described motor-field time-domain signal.
3. detect a device for asynchronous motor fault, including asynchronous motor (1), rosette (2), signal measurement and analytic unit (3) and display screen (4), it is characterized in that,
Any one stator tooth (7) of described asynchronous motor (1) is nested with m circle detection coil (6);
Two lead ends of the detection coil (6) after described placement are drawn from rosette (2), and accesses in described signal measurement and analytic unit (3);
Utilize the voltage signal measurement to detection coil (6) of described signal measurement and analytic unit (3) and spectrum analysis, it is thus achieved that the induced voltage spectrogram at detection coil (6) two ends;
Judge whether described voltage signal exists corresponding characteristic frequency according to described voltage spectrum figure; If existing characteristics frequency, then it represents that described asynchronous motor (1) exists fault; Described fault includes: stator winding inter-turn short circuit fault fault, rotor broken bar or end ring fracture defect, fault of eccentricity.
CN201610034719.6A 2016-01-19 2016-01-19 Fault detection method and device for asynchronous motor Pending CN105676127A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610034719.6A CN105676127A (en) 2016-01-19 2016-01-19 Fault detection method and device for asynchronous motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610034719.6A CN105676127A (en) 2016-01-19 2016-01-19 Fault detection method and device for asynchronous motor

Publications (1)

Publication Number Publication Date
CN105676127A true CN105676127A (en) 2016-06-15

Family

ID=56301561

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610034719.6A Pending CN105676127A (en) 2016-01-19 2016-01-19 Fault detection method and device for asynchronous motor

Country Status (1)

Country Link
CN (1) CN105676127A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106501665A (en) * 2016-12-15 2017-03-15 华北电力大学（保定） Hydraulic generator rotor winding interturn short-circuit diagnostic method based on detection coil
CN106602797A (en) * 2017-02-28 2017-04-26 合肥工业大学 Non-intrusion type detection apparatus for detecting eccentric faults of induction motor, and detection method thereof
CN106771835A (en) * 2016-12-15 2017-05-31 华北电力大学（保定） Rotor of steam turbo generator turn-to-turn short circuit diagnostic device and method based on detection coil
CN106772037A (en) * 2016-12-15 2017-05-31 华北电力大学（保定） Synchronous generator rotor winding interturn short-circuit diagnostic method based on twin coil
CN107402350A (en) * 2017-08-21 2017-11-28 西安交通大学 A kind of threephase asynchronous machine fault of eccentricity detection method
CN107843805A (en) * 2017-10-30 2018-03-27 华北电力大学（保定） Brushless exciter rotating diode open fault inline diagnosis method
CN107860972A (en) * 2017-10-25 2018-03-30 北京信息科技大学 Method for detecting harmonic wave and m-Acetyl chlorophosphonazo
CN109581145A (en) * 2018-11-22 2019-04-05 珠海格力电器股份有限公司 Stator winding faults detection method and detection device
CN109845090A (en) * 2016-10-18 2019-06-04 Abb瑞士股份有限公司 Method for detecting failure in motor
CN110492689A (en) * 2019-08-28 2019-11-22 河海大学 The permanent magnet motor structure and method of detectable permanent magnet demagnetization and rotor eccentricity failure
CN114355186A (en) * 2021-11-26 2022-04-15 合肥工业大学 Method for diagnosing rotor broken bar and speed sensor fault of asynchronous motor system

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060006879A1 (en) * 2004-07-12 2006-01-12 Behrooz Mirafzal Method of diagnosing a broken bar fault in an induction motor
CN101262153A (en) * 2008-04-21 2008-09-10 哈尔滨理工大学 Cage inductive electromotor with detection loop and detection method for its rotor broken bar
CN101363901A (en) * 2008-09-23 2009-02-11 中国人民解放军国防科学技术大学 Method for detecting early failure of generator by enhancing transformations by electrical current characteristic
CN201514468U (en) * 2009-11-10 2010-06-23 哈尔滨理工大学 Cage type induction motor rotor strip breaking failure detecting device and motor with the device
CN102033210A (en) * 2009-09-30 2011-04-27 田京涛 Air-gap field detecting device of alternating-current generator and application thereof in state monitoring and control method of alternating-current generator
CN103698699A (en) * 2013-12-06 2014-04-02 西安交通大学 Asynchronous motor fault monitoring and diagnosing method based on model
CN103713261A (en) * 2013-12-26 2014-04-09 合肥工业大学 Induction motor air-gap eccentric fault detection system and detection method
CN203616452U (en) * 2013-12-26 2014-05-28 合肥工业大学 Detection system of induction motor air gap eccentric faults
CN105044602A (en) * 2015-08-25 2015-11-11 合肥工业大学 Eccentricity detection apparatus for inductor motor and detection method thereof
CN105044601A (en) * 2015-08-25 2015-11-11 合肥工业大学 Eccentric detection apparatus using leakage magnetic field detection induction motor and detection method thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060006879A1 (en) * 2004-07-12 2006-01-12 Behrooz Mirafzal Method of diagnosing a broken bar fault in an induction motor
CN101262153A (en) * 2008-04-21 2008-09-10 哈尔滨理工大学 Cage inductive electromotor with detection loop and detection method for its rotor broken bar
CN101363901A (en) * 2008-09-23 2009-02-11 中国人民解放军国防科学技术大学 Method for detecting early failure of generator by enhancing transformations by electrical current characteristic
CN102033210A (en) * 2009-09-30 2011-04-27 田京涛 Air-gap field detecting device of alternating-current generator and application thereof in state monitoring and control method of alternating-current generator
CN201514468U (en) * 2009-11-10 2010-06-23 哈尔滨理工大学 Cage type induction motor rotor strip breaking failure detecting device and motor with the device
CN103698699A (en) * 2013-12-06 2014-04-02 西安交通大学 Asynchronous motor fault monitoring and diagnosing method based on model
CN103713261A (en) * 2013-12-26 2014-04-09 合肥工业大学 Induction motor air-gap eccentric fault detection system and detection method
CN203616452U (en) * 2013-12-26 2014-05-28 合肥工业大学 Detection system of induction motor air gap eccentric faults
CN105044602A (en) * 2015-08-25 2015-11-11 合肥工业大学 Eccentricity detection apparatus for inductor motor and detection method thereof
CN105044601A (en) * 2015-08-25 2015-11-11 合肥工业大学 Eccentric detection apparatus using leakage magnetic field detection induction motor and detection method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郎许飞: "基于粗糙集与支持向量机的异步电动机转子故障诊断的研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109845090A (en) * 2016-10-18 2019-06-04 Abb瑞士股份有限公司 Method for detecting failure in motor
CN106772037B (en) * 2016-12-15 2019-07-09 华北电力大学（保定） Synchronous generator rotor winding interturn short-circuit diagnostic method based on twin coil
CN106771835A (en) * 2016-12-15 2017-05-31 华北电力大学（保定） Rotor of steam turbo generator turn-to-turn short circuit diagnostic device and method based on detection coil
CN106772037A (en) * 2016-12-15 2017-05-31 华北电力大学（保定） Synchronous generator rotor winding interturn short-circuit diagnostic method based on twin coil
CN106501665A (en) * 2016-12-15 2017-03-15 华北电力大学（保定） Hydraulic generator rotor winding interturn short-circuit diagnostic method based on detection coil
CN106501665B (en) * 2016-12-15 2019-07-09 华北电力大学（保定） Hydraulic generator rotor winding interturn short-circuit diagnostic method based on detection coil
CN106771835B (en) * 2016-12-15 2019-06-18 华北电力大学（保定） Rotor of steam turbo generator turn-to-turn short circuit diagnostic device and method based on detection coil
CN106602797B (en) * 2017-02-28 2019-06-14 合肥工业大学 The detection device and its detection method of Noninvasive testing induction conductivity bias
CN106602797A (en) * 2017-02-28 2017-04-26 合肥工业大学 Non-intrusion type detection apparatus for detecting eccentric faults of induction motor, and detection method thereof
CN107402350A (en) * 2017-08-21 2017-11-28 西安交通大学 A kind of threephase asynchronous machine fault of eccentricity detection method
CN107860972A (en) * 2017-10-25 2018-03-30 北京信息科技大学 Method for detecting harmonic wave and m-Acetyl chlorophosphonazo
CN107843805A (en) * 2017-10-30 2018-03-27 华北电力大学（保定） Brushless exciter rotating diode open fault inline diagnosis method
CN109581145A (en) * 2018-11-22 2019-04-05 珠海格力电器股份有限公司 Stator winding faults detection method and detection device
CN110492689A (en) * 2019-08-28 2019-11-22 河海大学 The permanent magnet motor structure and method of detectable permanent magnet demagnetization and rotor eccentricity failure
CN114355186A (en) * 2021-11-26 2022-04-15 合肥工业大学 Method for diagnosing rotor broken bar and speed sensor fault of asynchronous motor system
CN114355186B (en) * 2021-11-26 2023-03-07 合肥工业大学 Method for diagnosing rotor broken bar and speed sensor fault of asynchronous motor system

Similar Documents

Publication Publication Date Title
CN105676127A (en) Fault detection method and device for asynchronous motor
CN103823150B (en) Turbo generator rotor interturn short circuit fault diagnosis method of multi sensor joint
WO2014156386A1 (en) Electric motor diagnosis device and switching device
EP2728367B1 (en) A method for detecting a fault condition in an electrical machine
CN106537164B (en) For detecting the method and system of rotor fault
US7042229B2 (en) System and method for on line monitoring of insulation condition for DC machines
CN102520352B (en) Brushless alternating current (AC) generator failure diagnosis instrument
CN100561246C (en) Load behavior is discerned the method for generator rotor interturn short-circuit fault down automatically
CN104569733B (en) A kind of method for determining motor excitation winding interturn short-circuit abort situation
KR20090093847A (en) Methods and systems for detecting rotor field ground faults in rotating machinery
CN103792462B (en) Power transformer winding turn-to-turn short circuit failure detecting method based on resistance frequency curve
CN102360054A (en) Diagnostic method for estimating turn-to-turn short circuit fault degree of large generator exciting windings
CN103743554A (en) High-voltage circuit breaker mechanical failure diagnosis method based on vibration signal analysis
CN201607510U (en) Motor fault detecting equipment and system
EP2851698B1 (en) A method for detecting a fault in an electrical machine
CN114616476A (en) Fault detection in synchronous machines
Prus et al. The determination of the condition of the windings of electric machines with long mean-time-between failures
US9383413B2 (en) Method of processing recurrent surge oscillograph data to enable more precise location of generator rotor inter-turn shorts and ground faults
EP2249475A2 (en) Method for recognising errors when controlling a rotating field engine
Faiz et al. A review of application of signal processing techniques for fault diagnosis of induction motors–Part I
CN105259483A (en) Method for measuring insulating state of generator rotor winding to iron core and shaft system
CN101262153A (en) Cage inductive electromotor with detection loop and detection method for its rotor broken bar
CN204425122U (en) For the on-line checkingi structure of permanent magnet synchronous motor rotor magnetic steel temperature
EP3745149B1 (en) Power conversion device, rotating machine system using same, and diagnosis method for same
Mirzaeva et al. Ac motor instrumentation and main air gap flux measurement for fault diagnostics

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20160615