CN113419148A - Testing method for motor winding insulation - Google Patents
Testing method for motor winding insulation Download PDFInfo
- Publication number
- CN113419148A CN113419148A CN202110739974.1A CN202110739974A CN113419148A CN 113419148 A CN113419148 A CN 113419148A CN 202110739974 A CN202110739974 A CN 202110739974A CN 113419148 A CN113419148 A CN 113419148A
- Authority
- CN
- China
- Prior art keywords
- insulation
- current
- motor
- motor winding
- drainage
- 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
Links
Images
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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention discloses a test method for insulation of a motor winding, which comprises a drainage system, an analysis system, a display system, a control unit and a detection system, wherein the drainage system comprises a drainage device, the drainage device introduces shock waves generated by thunder into the detection system, the waveforms of current and voltage are obtained through a damage indicating resistance device and a voltage divider when the thunder shock waves are generated, the voltage and the current waveforms of the shock waves before being connected into the detection system are used as references, and the specific positions of whether the motor winding is insulated or not and not are obtained through carrying out opposite sides on the waveforms generated after detection, and the detection system mainly comprises a high-frequency current transformer and a transformer auxiliary connection mechanism. According to the invention, the lightning impulse waves are reflected in the winding of the motor, the insulation condition of the winding of the motor is judged by checking whether high-frequency current appears in the grounding of the motor, and meanwhile, the detection efficiency can be improved by detecting the insulation of the motor through the high-frequency current.
Description
Technical Field
The invention relates to the technical field of motor production and manufacturing, in particular to a method for testing motor winding insulation.
Background
The generator is represented by a letter G in a circuit, and the generator mainly functions to convert mechanical energy into electric energy; a winding is a group of turns that constitutes an electrical line corresponding to a certain voltage value noted by the transformer. The terminal voltage of each secondary winding is different when the number of turns of the secondary winding is different, so that the multi-winding transformer can supply power to several electric devices with different voltages. The most common in power systems are three-winding transformers; the lightning surge test voltage is mostly protected by a transformer, the determining factors are mainly the protection level of the lightning arrester, the protection level has no relation with lightning overvoltage, if the lightning arrester discharges, the residual voltage formed by lightning current is the lightning overvoltage born by the transformer, the waveform of the residual voltage of the lightning arrester acting on the transformer is standardized, namely the simulated lightning surge test waveform, and the waveform can be divided into two types of chopping and full wave.
The existing motor winding insulation test mode comprises direct test of instruments and meters and megameter test, wherein two more test modes are used, but the two test modes have relatively low efficiency in the test process, and some damaged places on the motor winding cannot be detected, so that the test is dangerous.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a method for testing the insulation of a motor winding.
The invention provides a test method for insulation of a motor winding, which comprises a drainage system, an analysis system, a display system, a control unit and a detection system, wherein the drainage system comprises a drainage device, the drainage device introduces a shock wave generated by thunder into the detection system, the waveforms of current and voltage are obtained by a damage indicating resistance device and a voltage divider respectively when the thunder shock wave is generated, the voltage and the current waveform of the shock wave before the lightning shock wave is introduced into the detection system are taken as references, and the specific positions of whether the motor winding is insulated or not are obtained by carrying out opposite sides on the waveforms generated after the lightning shock wave is detected, the detection system mainly comprises a high-frequency current transformer and a transformer auxiliary connection mechanism, the current transformer is connected onto a shell of a motor, when the thunder shock wave is introduced into the detection system through the drainage system, if the current transformer generates larger grounding current, the display system mainly displays current and voltage waveform diagrams before and after lightning shock waves are introduced into the detection system, so that the insulation condition of the motor winding can be observed directly through the waveform diagrams, the analysis system directly collects and arranges the data of the lightning shock waves and feeds the data back to the display system, and the collected data are converted into graphs to more visually reflect the insulation condition of the motor winding.
Furthermore, the control unit mainly detects communication among all systems, and prevents the communication among the systems from being unsmooth, so that the test fails.
Furthermore, the damage indicating resistance device needs to fix the resistance when being connected into a circuit, so that the safety of the test is improved.
Further, when the motor winding has an insulation problem, a discharge channel is formed between a damaged part of the winding and a shell of the motor, the high-frequency current transformer is used for detecting the magnitude of discharge current, the deterioration condition of the winding can be judged according to the magnitude of the discharge current, and the condition that the current is small indicates that the deterioration degree is low and the deterioration degree is high if the current is reversed.
Further, the controller mainly comprises a DSP processor, the dynamic change in each system is converted into an electric signal, and the running condition of each system is obtained through data analysis of the electric signal.
Further, the drainage system includes heat dissipation mechanism, and lightning impulse wave gets into the high-frequency current in the drainage system and can make the drainage system produce a large amount of heats, need in time dispel the heat to the drainage device, avoids the condition that the drainage device appears burning out.
Furthermore, the test method further comprises a remote control system, remote operation and detection of each system are achieved through the remote control system, safety of the test method can be improved, and safety accidents are prone to occurring in the operation process of the high-frequency current transformer.
The beneficial effects of the invention are as follows:
according to the invention, the lightning impulse waves are reflected into the winding of the motor, the insulation condition of the motor winding is judged by checking whether high-frequency current appears in the grounding of the motor, meanwhile, the detection efficiency can be improved by detecting the motor insulation through the high-frequency current, the obtained data drawing waveform diagram is directly and visually reflected with the standard lightning impulse voltage waveform diagram through detecting the high-frequency voltage on the motor winding during the experiment, and the damage condition of the motor winding can be effectively reflected according to the current detected by the high-frequency current transformer and the current size and is in direct proportion to the current size.
Drawings
Fig. 1 is a system diagram illustrating an embodiment of a method for testing insulation of a winding of a motor according to the present invention;
FIG. 2 is a system diagram of a second embodiment of a method for testing insulation of a winding of a motor according to the present invention;
FIG. 3 is a graph of a standard lightning impulse voltage waveform of a test method for motor winding insulation according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example one
Referring to fig. 1 and 3, a test method of insulation of a motor winding includes a current guiding system, an analyzing system, a display system, a control unit and a detecting system, the current guiding system includes a current guiding device, the current guiding device introduces a shock wave generated by a lightning into the detecting system, the lightning shock wave is generated by a damage indicating resistance device and a voltage divider respectively to obtain a current waveform and a voltage waveform, the voltage waveform and the current waveform of the shock wave before being connected into the detecting system are used as a reference, and the waveform generated after detection is subjected to opposite sides to obtain a specific position of whether the motor winding is insulated or not, the detecting system mainly includes a high-frequency current transformer and a transformer auxiliary connecting mechanism, the current transformer is connected to a housing of the motor, when the lightning shock wave is introduced into the detecting system through the current guiding system, if a larger grounding current is generated on the current transformer, the method has the advantages that insulation faults of the winding of the motor are shown, otherwise, insulation of the winding of the motor is good if no grounding current appears, the display system mainly displays current and voltage waveforms before and after lightning impulse waves are introduced into the detection system, the insulation condition of the winding of the motor is convenient to observe directly through the waveform diagrams, the analysis system directly collects and arranges data of the lightning impulse waves and feeds the data back to the display system, and the collected data are converted into graphs to reflect the insulation condition of the winding of the motor more visually.
In the invention, the control unit mainly detects the communication among the systems, thereby preventing the communication among the systems from being unsmooth to cause test failure, the resistor needs to be fixed when the resistor device is connected into a circuit, thereby improving the safety of the test, when the motor winding has insulation problems, a discharge channel is formed between the damaged part of the winding and the shell of the motor, the high-frequency current transformer is used for detecting the size of discharge current, the deterioration condition of the winding can be judged according to the size of the discharge current, the condition of smaller current indicates that the deterioration degree is low and reversed, and then indicates that the deterioration degree is high, the controller mainly comprises a DSP processor, the dynamic change in each system is converted into electric signals, the running condition of each system is obtained through the data analysis of the electric signals, the drainage system comprises a heat dissipation mechanism, and the high-frequency current can lead the drainage system to generate a large amount of heat when lightning impulse waves enter the drainage system, the drainage device is required to be timely cooled, and the phenomenon that the drainage device is burnt out and the lightning impulse voltage waveform chart rapidly rises and slowly falls when being characterized is avoided, so that impulse voltage is generated on the grounding resistor.
Example two
Referring to fig. 2 and 3, a test method of insulation of a motor winding includes a current guiding system, an analyzing system, a display system, a control unit and a detecting system, the current guiding system includes a current guiding device, the current guiding device introduces a shock wave generated by a lightning into the detecting system, the lightning shock wave is generated by a damage indicating resistance device and a voltage divider respectively to obtain a current waveform and a voltage waveform, the voltage waveform and the current waveform of the shock wave before being connected into the detecting system are used as a reference, and the waveform generated after detection is subjected to opposite sides to obtain a specific position of whether the motor winding is insulated or not, the detecting system mainly includes a high-frequency current transformer and a transformer auxiliary connecting mechanism, the current transformer is connected to a housing of the motor, when the lightning shock wave is introduced into the detecting system through the current guiding system, if a larger grounding current is generated on the current transformer, then show that the winding of motor insulating fault appears, otherwise if ground current does not appear then show motor winding's insulating intact, display system shows the current voltage waveform diagram around leading into detecting system with the thunder and lightning impulse wave when main, be convenient for directly observe motor winding's the insulating condition through the oscillogram, drainage system is including heat dissipation mechanism, the thunder and lightning impulse wave gets into the high-frequency current in the drainage system and can make drainage system produce a large amount of heats, need in time dispel the heat to drainage device, avoid drainage device the condition that burns out to appear, analytic system is that direct data collection with the thunder and lightning impulse wave feeds back to display system after the arrangement, turn into the insulating condition of the more audio-visual reaction motor winding of figure with the data collected.
In the invention, the control unit mainly detects the communication among the systems, thereby preventing the communication among the systems from being unsmooth to cause test failure, the resistor needs to be fixed when the resistor device is connected into a circuit, thereby improving the safety of the test, when the motor winding has insulation problems, a discharge channel is formed between the damaged part of the winding and the shell of the motor, the size of discharge current is detected by a high-frequency current transformer, the deterioration condition of the winding can be judged by the size of the discharge current, the condition of smaller current indicates that the deterioration degree is low and the deterioration degree is high if the deterioration degree is reverse, the controller mainly comprises a DSP processor, dynamic changes in the systems are converted into electric signals, the running condition of the systems is obtained by data analysis of the electric signals, the test method also comprises a remote control system, and the remote operation and detection of the systems are realized by the remote control system, the safety of the test method can be improved, safety accidents are easy to occur in the operation process of the high-frequency current transformer, the lightning impulse voltage waveform chart rapidly rises and slowly falls under the characteristics, and impulse voltage is generated on the grounding resistor.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A test method for insulation of a motor winding is characterized by comprising a drainage system, an analysis system, a display system, a control unit and a detection system, wherein the drainage system comprises a drainage device, the drainage device introduces shock waves generated by thunder into the detection system, the waveforms of current and voltage are obtained through a damage indicating resistance device and a voltage divider respectively when the thunder shock waves are generated, the voltage and the current waveforms of the shock waves before the lightning shock waves are connected into the detection system are used as references, and the specific positions of whether the motor winding is insulated or not are obtained through carrying out opposite sides on the waveforms generated after the lightning shock waves are detected, the detection system mainly comprises a high-frequency current transformer and a transformer auxiliary connection mechanism, the current transformer is connected onto a shell of a motor, when the thunder shock waves are introduced into the detection system through the drainage system, if the current transformer generates larger grounding current, the display system mainly displays current and voltage waveform diagrams before and after lightning shock waves are introduced into the detection system, so that the insulation condition of the motor winding can be observed directly through the waveform diagrams, the analysis system directly collects and arranges the data of the lightning shock waves and feeds the data back to the display system, and the collected data are converted into graphs to more visually reflect the insulation condition of the motor winding.
2. The method for testing the insulation of the motor winding according to claim 1, wherein the control unit mainly detects communication among the systems, and prevents communication among the systems from being poor so as to cause test failure.
3. The method for testing the insulation of the motor winding according to claim 1, wherein the damage indicating resistor device needs to fix the resistor when being connected into a circuit, so that the test safety is improved.
4. The method for testing the insulation of the motor winding according to claim 1, wherein when the insulation problem of the motor winding occurs, a discharge channel is formed between a damaged part of the winding and a shell of the motor, the high-frequency current transformer is used for detecting the magnitude of the discharge current, the deterioration condition of the winding can be judged according to the magnitude of the discharge current, and the condition that the current is small indicates that the deterioration degree is low and the reversal degree indicates that the deterioration degree is high.
5. The method of claim 1, wherein the controller mainly comprises a DSP processor, the dynamic changes in each system are converted into electric signals, and the operation conditions of each system are obtained through data analysis of the electric signals.
6. The method for testing the insulation of the motor winding according to claim 1, wherein the drainage system comprises a heat dissipation mechanism, and the high-frequency current generated when the lightning shock wave enters the drainage system can cause the drainage system to generate a large amount of heat, so that the drainage device needs to be dissipated in time, and the situation that the drainage device is burnt out is avoided.
7. The method for testing the insulation of the motor winding according to claim 1, wherein the method further comprises a remote control system, each system is remotely operated and detected through the remote control system, the safety of the testing method can be improved, and safety accidents are easy to occur in the operation process of the high-frequency current transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739974.1A CN113419148A (en) | 2021-06-30 | 2021-06-30 | Testing method for motor winding insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110739974.1A CN113419148A (en) | 2021-06-30 | 2021-06-30 | Testing method for motor winding insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113419148A true CN113419148A (en) | 2021-09-21 |
Family
ID=77717509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110739974.1A Pending CN113419148A (en) | 2021-06-30 | 2021-06-30 | Testing method for motor winding insulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113419148A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838875A (en) * | 1981-08-31 | 1983-03-07 | Toshiba Corp | Device to test insulation between turns |
| DE19539926C1 (en) * | 1995-10-26 | 1996-12-19 | Siemens Ag | Appts. for determining insulation damage in wound insulated wires esp. enamelled motor coil wires |
| CN1210268A (en) * | 1998-04-23 | 1999-03-10 | 中国科学院等离子体物理研究所 | Method for insulation inspecting and ground protecting for windings of D. C. motor armature |
| JP2002062330A (en) * | 2000-08-18 | 2002-02-28 | Hitachi Ltd | Apparatus and method for evaluating integrity of insulation between coil turns |
| JP2004226300A (en) * | 2003-01-24 | 2004-08-12 | Toshiba Corp | Device and method for diagnosing deterioration of rotary electric machine |
| CN105807194A (en) * | 2016-05-09 | 2016-07-27 | 三峡大学 | Fault diagnosis method for converter transformer winding under lightning impulse based on LVQ neural network |
| CN108267660A (en) * | 2018-03-21 | 2018-07-10 | 广东电网有限责任公司电力科学研究院 | A kind of Diagnosis Method of Transformer Faults and device |
| CN109298299A (en) * | 2018-11-30 | 2019-02-01 | 保定天威保变电气股份有限公司 | A kind of transformer class product thunder and lightning/switching impulse gradiometry test console and test method |
| CN110401173A (en) * | 2019-07-19 | 2019-11-01 | 中国科学院电工研究所 | A kind of short trouble isolation structure of aero dynamo |
| CN111458604A (en) * | 2019-12-27 | 2020-07-28 | 广东电网有限责任公司电力科学研究院 | Transformer self-sensing-based oscillation type lightning impulse test system and method |
-
2021
- 2021-06-30 CN CN202110739974.1A patent/CN113419148A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5838875A (en) * | 1981-08-31 | 1983-03-07 | Toshiba Corp | Device to test insulation between turns |
| DE19539926C1 (en) * | 1995-10-26 | 1996-12-19 | Siemens Ag | Appts. for determining insulation damage in wound insulated wires esp. enamelled motor coil wires |
| CN1210268A (en) * | 1998-04-23 | 1999-03-10 | 中国科学院等离子体物理研究所 | Method for insulation inspecting and ground protecting for windings of D. C. motor armature |
| JP2002062330A (en) * | 2000-08-18 | 2002-02-28 | Hitachi Ltd | Apparatus and method for evaluating integrity of insulation between coil turns |
| JP2004226300A (en) * | 2003-01-24 | 2004-08-12 | Toshiba Corp | Device and method for diagnosing deterioration of rotary electric machine |
| CN105807194A (en) * | 2016-05-09 | 2016-07-27 | 三峡大学 | Fault diagnosis method for converter transformer winding under lightning impulse based on LVQ neural network |
| CN108267660A (en) * | 2018-03-21 | 2018-07-10 | 广东电网有限责任公司电力科学研究院 | A kind of Diagnosis Method of Transformer Faults and device |
| CN109298299A (en) * | 2018-11-30 | 2019-02-01 | 保定天威保变电气股份有限公司 | A kind of transformer class product thunder and lightning/switching impulse gradiometry test console and test method |
| CN110401173A (en) * | 2019-07-19 | 2019-11-01 | 中国科学院电工研究所 | A kind of short trouble isolation structure of aero dynamo |
| CN111458604A (en) * | 2019-12-27 | 2020-07-28 | 广东电网有限责任公司电力科学研究院 | Transformer self-sensing-based oscillation type lightning impulse test system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106526383B (en) | Lightning arrester state monitoring system and monitoring method | |
| CN103234576A (en) | State monitoring system for power devices in intelligent substations | |
| CN106597147A (en) | State monitoring system and method of lightning arrester with series gap based on residual voltage monitoring | |
| JP5513677B2 (en) | Pulse current sensor and surge wave recording type lightning protection cabinet having the sensor | |
| CN201429629Y (en) | Insulation resistance safety test box | |
| CN201449437U (en) | Voltage-withstanding tester with high-voltage protective circuit | |
| CN113419148A (en) | Testing method for motor winding insulation | |
| CN114089182B (en) | Transformer fault early warning tripping method and device based on secondary wave recording | |
| CN115453290A (en) | Transformer bushing online monitoring system and method | |
| CN112216450A (en) | Monitoring integration arrester | |
| CN202050231U (en) | Built-in detecting device of surge protector | |
| CN2228661Y (en) | Lightning on-line monitor | |
| CN219458910U (en) | Transformer abnormal sound solving system | |
| CN217505965U (en) | 10KV high-voltage isolation induction feed detection device for coal mine | |
| CN213242108U (en) | Monitoring integration arrester | |
| CN104753047A (en) | Novel surge protection device | |
| CN215067063U (en) | Switch cabinet partial discharge detection system | |
| CN115127193B (en) | Zero and live wire wiring looseness detection method and system and air conditioner outdoor unit | |
| CN203707762U (en) | Novel surge protection device | |
| CN219224905U (en) | Multifunctional insulation resistance test meter pen | |
| CN113219377B (en) | Generator primary loop inspection method based on injection type stator grounding protection device | |
| CN219495983U (en) | High-speed pressure relief explosion-proof decompression mechanism test device for transformer | |
| CN117554856B (en) | Performance verification device and method for active defense equipment for turn-to-turn short circuit of transformer | |
| CN207281212U (en) | A kind of master iron core monitoring and Current limited Control system based on programmable sensor | |
| CN2470838Y (en) | Insulated charged detecting-sampling protector of high-voltage electric equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210921 |
|
| RJ01 | Rejection of invention patent application after publication |