CN104132993A - Cast-aluminum rotor die-casting performance test method - Google Patents
Cast-aluminum rotor die-casting performance test method Download PDFInfo
- Publication number
- CN104132993A CN104132993A CN201410355500.7A CN201410355500A CN104132993A CN 104132993 A CN104132993 A CN 104132993A CN 201410355500 A CN201410355500 A CN 201410355500A CN 104132993 A CN104132993 A CN 104132993A
- Authority
- CN
- China
- Prior art keywords
- rotor
- die
- short
- casting
- locked
- 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
- 238000004512 die casting Methods 0.000 title claims abstract description 32
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000011056 performance test Methods 0.000 title abstract 2
- 238000012360 testing method Methods 0.000 claims abstract description 21
- 238000002474 experimental method Methods 0.000 claims abstract description 15
- 230000007547 defect Effects 0.000 claims abstract description 9
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Landscapes
- Induction Machinery (AREA)
Abstract
The invention discloses a cast-aluminum rotor die-casting performance test method which comprises the following steps: 1) a qualified prototype is taken and locked-rotor power and short circuit current of a rotor of the qualified prototype are recorded by a short-circuit loss experiment of the rotor of the qualified prototype; 2) a stator of the above qualified prototype is taken and AC test voltage is applied across a main phase of the stator; 3) a die-casting rotor to be measured is stuffed in an inner hole of the stator, and the center line of a rotor core is aligned with the center line of a stator core; 4) a short-circuit loss experiment is carried out on the die-casting rotor to be measured to record locked-rotor power and short circuit current of the die-casting rotor to be measured; and 5) if the locked-rotor power/short circuit current of the die-casting rotor to be measured is less than locked-rotor power/short circuit current of the rotor of the qualified prototype, it is judged that the die-casting rotor to be measured has local defects; and if the locked-rotor power/short circuit current of the die-casting rotor to be measured is greater than or equal to the locked-rotor power/short circuit current of the rotor of the qualified prototype, it is judged that the die-casting rotor to be measured is qualified.
Description
Technical Field
The invention relates to a method for testing the die-casting performance of a cast-aluminum rotor.
Background
In the current market, a nondestructive simulation experiment of equivalent overvoltage is carried out on a rotor by high-voltage shock waves, sine waves of a prototype rotor are stored, and the tested rotor is visually distinguished by comparing and analyzing the tested rotor. The detection method commonly used in the market at present is a rotor broken bar tester, but the defect of the cast aluminum quality of the rotor cannot be accurately detected.
Disclosure of Invention
The invention aims to provide a method for testing the die-casting performance of a cast-aluminum rotor, which can directly detect a rotor with partial defects.
In order to achieve the purpose, the technical scheme of the invention is to design a method for testing the die-casting performance of a cast-aluminum rotor, which comprises the following steps:
1) taking a qualified prototype, performing a short-circuit loss experiment on a qualified prototype rotor, and recording locked rotor power and short-circuit current of the qualified prototype rotor;
2) taking the stator of the qualified prototype, and connecting the main phase with an alternating current test voltage;
3) a to-be-tested die-cast rotor is plugged into an inner hole of a stator, and the center line of a rotor core is aligned with the center line of a stator core;
4) recording locked rotor power and short-circuit current of the to-be-detected die-casting rotor by adopting a short-circuit loss experiment;
5) if the locked-rotor power/short-circuit current of the die-casting rotor to be detected is smaller than the locked-rotor power/short-circuit current of the qualified prototype rotor, judging that the die-casting rotor to be detected has local defects; if the locked-rotor power/short-circuit current of the die-casting rotor to be tested is greater than or equal to the locked-rotor power/short-circuit current of the qualified prototype rotor, judging that the die-casting rotor to be tested is qualified;
wherein,
when the ambient temperature is 10-25 ℃, the test voltage is stabilized at 140V;
when the ambient temperature is below 10 ℃, the test voltage is stabilized at 139V;
the test voltage is stabilized at 141V when the ambient temperature is below 25 ℃.
The invention has the advantages and beneficial effects that: a method for inspecting die-casting performance of a cast-aluminum rotor is provided, which can directly detect a partially defective rotor.
Drawings
Fig. 1 is a schematic diagram of a nondestructive simulation experiment of equivalent overvoltage of a rotor by high-voltage shock waves in the market at present.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1, in the current market, a nondestructive simulation experiment of equivalent overvoltage is performed on a rotor by using high-voltage shock waves, a sine waveform of a prototype rotor is stored, and the tested rotor is visually judged by comparing and analyzing the tested rotor.
The detection method commonly used in the market at present is a rotor broken bar tester, but the defect of the cast aluminum quality of the rotor cannot be accurately detected. Table 1 is data analyzed from a set of rotor bar break test experiments.
Now, by comparing the experiments, it can be seen that: local fine shrinkage cavities and air holes at the ends of the rings cannot be detected.
The technical scheme of the specific implementation of the invention is as follows:
a method for testing the die-casting performance of a cast-aluminum rotor comprises the following steps:
1) taking a qualified prototype, performing a short-circuit loss experiment on a qualified prototype rotor, and recording locked rotor power and short-circuit current of the qualified prototype rotor;
2) taking the stator of the qualified prototype, and connecting the main phase with an alternating current test voltage;
3) a to-be-tested die-cast rotor is plugged into an inner hole of a stator, and the center line of a rotor core is aligned with the center line of a stator core;
4) recording locked rotor power and short-circuit current of the to-be-detected die-casting rotor by adopting a short-circuit loss experiment;
5) if the locked-rotor power/short-circuit current of the die-casting rotor to be detected is smaller than the locked-rotor power/short-circuit current of the qualified prototype rotor, judging that the die-casting rotor to be detected has local defects; if the locked-rotor power/short-circuit current of the die-casting rotor to be tested is greater than or equal to the locked-rotor power/short-circuit current of the qualified prototype rotor, judging that the die-casting rotor to be tested is qualified;
wherein,
when the ambient temperature is 10-25 ℃, the test voltage is stabilized at 140V;
when the ambient temperature is below 10 ℃, the test voltage is stabilized at 139V;
the test voltage is stabilized at 141V when the ambient temperature is below 25 ℃.
Because the defects of broken bars, thin bars, shrinkage cavities and the like can be reflected from the change of the resistance value of the conducting bar, the more serious the defects are, the larger the value is. According to this principle, short circuit loss experiments are now applied to the rotor. The principle is as follows: the purpose of the short circuit (locked rotor) experiment is to determine the short circuit impedance, the rotor resistance and the leakage reactance of the stator and the rotor of the asynchronous motor. The short-circuit laboratory is carried out under the condition that the rotor is locked, namely S =1, the magnitude of the power supply voltage is adjusted, the terminal voltage of the stator, the short-circuit current of the stator and the short-circuit loss power are recorded, the short-circuit characteristic of the motor can be obtained according to the terminal voltage, the short-circuit current of the stator and the short-circuit loss power, and the short-circuit impedance, the short-circuit resistance and the short-circuit reactance of the motor can be obtained according to short-.
The quality of the cast aluminum rotor directly influences the short-circuit resistance value, whether the cast rotor is correct or not directly influences the short-circuit impedance, and the short-circuit current and the short-circuit power range which the rotor of the type is required to have can be determined through the load experiment requirement of the motor, so that the short-circuit current and the short-circuit power range can be used as the detection requirement during the experiment process.
Table 2 is data analyzed from a set of rotor test experiments for the method of testing die casting performance of cast aluminum rotors of the present invention.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. The method for testing the die-casting performance of the cast-aluminum rotor is characterized by comprising the following steps of:
1) taking a qualified prototype, performing a short-circuit loss experiment on a qualified prototype rotor, and recording locked rotor power and short-circuit current of the qualified prototype rotor;
2) taking the stator of the qualified prototype, and connecting the main phase with an alternating current test voltage;
3) a to-be-tested die-cast rotor is plugged into an inner hole of a stator, and the center line of a rotor core is aligned with the center line of a stator core;
4) recording locked rotor power and short-circuit current of the to-be-detected die-casting rotor by adopting a short-circuit loss experiment;
5) if the locked-rotor power/short-circuit current of the die-casting rotor to be detected is smaller than the locked-rotor power/short-circuit current of the qualified prototype rotor, judging that the die-casting rotor to be detected has local defects; if the locked-rotor power/short-circuit current of the die-casting rotor to be tested is greater than or equal to the locked-rotor power/short-circuit current of the qualified prototype rotor, judging that the die-casting rotor to be tested is qualified;
wherein,
when the ambient temperature is 10-25 ℃, the test voltage is stabilized at 140V;
when the ambient temperature is below 10 ℃, the test voltage is stabilized at 139V;
the test voltage is stabilized at 141V when the ambient temperature is below 25 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355500.7A CN104132993A (en) | 2014-07-24 | 2014-07-24 | Cast-aluminum rotor die-casting performance test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410355500.7A CN104132993A (en) | 2014-07-24 | 2014-07-24 | Cast-aluminum rotor die-casting performance test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104132993A true CN104132993A (en) | 2014-11-05 |
Family
ID=51805749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410355500.7A Pending CN104132993A (en) | 2014-07-24 | 2014-07-24 | Cast-aluminum rotor die-casting performance test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104132993A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113242102A (en) * | 2021-04-09 | 2021-08-10 | 深圳市晨北科技有限公司 | Radio frequency test method and device, equipment and readable storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3517509A1 (en) * | 1985-05-15 | 1986-11-20 | Robert Bosch Gmbh, 7000 Stuttgart | Measuring device for detecting operating characteristics in a motor vehicle |
| CN1354557A (en) * | 2001-11-28 | 2002-06-19 | 深圳安圣电气有限公司 | Non-synchronous motor parameter identification method |
| JP2004215466A (en) * | 2003-01-09 | 2004-07-29 | Meidensha Corp | Sensorless measuring method and sensorless variable-speed device for position/speed/voltage amplitude of synchronous motor |
| CN101275988A (en) * | 2007-12-27 | 2008-10-01 | 奇瑞汽车股份有限公司 | Permanent magnetism synchronous electric machine test system and method |
| CN101452055A (en) * | 2008-11-21 | 2009-06-10 | 重庆三祥汽车电控系统有限公司 | Ultra-low voltage three phase AC induction machine test method and device |
| CN201527406U (en) * | 2009-09-24 | 2010-07-14 | 三禾电器(福建)有限公司 | Measuring equipment for evaluating die-casting quality of rotor |
| CN102735381A (en) * | 2012-06-15 | 2012-10-17 | 北京中陆航星机械动力科技有限公司 | Locked-rotor torque detection device and method for three-phase permanent magnet synchronous motor |
-
2014
- 2014-07-24 CN CN201410355500.7A patent/CN104132993A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3517509A1 (en) * | 1985-05-15 | 1986-11-20 | Robert Bosch Gmbh, 7000 Stuttgart | Measuring device for detecting operating characteristics in a motor vehicle |
| CN1354557A (en) * | 2001-11-28 | 2002-06-19 | 深圳安圣电气有限公司 | Non-synchronous motor parameter identification method |
| JP2004215466A (en) * | 2003-01-09 | 2004-07-29 | Meidensha Corp | Sensorless measuring method and sensorless variable-speed device for position/speed/voltage amplitude of synchronous motor |
| CN101275988A (en) * | 2007-12-27 | 2008-10-01 | 奇瑞汽车股份有限公司 | Permanent magnetism synchronous electric machine test system and method |
| CN101452055A (en) * | 2008-11-21 | 2009-06-10 | 重庆三祥汽车电控系统有限公司 | Ultra-low voltage three phase AC induction machine test method and device |
| CN201527406U (en) * | 2009-09-24 | 2010-07-14 | 三禾电器(福建)有限公司 | Measuring equipment for evaluating die-casting quality of rotor |
| CN102735381A (en) * | 2012-06-15 | 2012-10-17 | 北京中陆航星机械动力科技有限公司 | Locked-rotor torque detection device and method for three-phase permanent magnet synchronous motor |
Non-Patent Citations (2)
| Title |
|---|
| 江胜: "转子铸铝质量的检测", 《电机电器技术》 * |
| 芮静康: "《中小型电机修理手册》", 31 December 1997, 机械工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113242102A (en) * | 2021-04-09 | 2021-08-10 | 深圳市晨北科技有限公司 | Radio frequency test method and device, equipment and readable storage medium |
| CN113242102B (en) * | 2021-04-09 | 2022-08-19 | 深圳市晨北科技有限公司 | Radio frequency test method and device, equipment and readable storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Eftekhari et al. | Online detection of induction motor's stator winding short-circuit faults | |
| EP2977770B1 (en) | Leakage current detection method and device | |
| EP2728367A1 (en) | A method for detecting a fault condition in an electrical machine | |
| CN104914364B (en) | The method of condenser type oilpaper bushing shell for transformer Condition assessment of insulation | |
| CN105424890A (en) | Improved transformer insulation paper moisture assessment method | |
| JP2010185697A (en) | Apparatus and method for inspecting printed circuit board | |
| CN109932053B (en) | State monitoring device and method for high-voltage shunt reactor | |
| CN104267063A (en) | Low-value insulator detection method based on infrared thermography | |
| CN203037840U (en) | Insulation resistor test device calibrating device | |
| KR20240115786A (en) | Apparatus for discriminating defective insulator | |
| CN105629124A (en) | PCB network poor conduction analysis method | |
| Ahsanullah et al. | Detection and analysis of winding and demagnetization faults in PMSM based marine propulsion motors | |
| CN104132993A (en) | Cast-aluminum rotor die-casting performance test method | |
| CN109782172B (en) | Synchronous motor parameter test measurement method | |
| CN111044961B (en) | Test machine self-checking system and test method | |
| Yeh et al. | Diagnosis of stator winding inter-turn shorts in induction motors fed by PWM-inverter drive systems using a time-series data mining technique | |
| Coenen et al. | Statistical evaluation of manufacturing tolerances in electrical machines by simulation and measurement | |
| EP1705490B1 (en) | Method for estimating the adequacy of protective devices | |
| CN111157869A (en) | Motor controller IGBT (insulated Gate Bipolar transistor) open circuit and motor three-phase open circuit detection method | |
| CN109579998B (en) | Detection method for contact resistance of photovoltaic connector | |
| CN104865510B (en) | The method of inspection of air reactor inner conductor Abnormal Insulation and mass defect | |
| CN110716138A (en) | Method for identifying turn-to-turn short circuit fault of stator winding of cage type asynchronous motor | |
| CN210181588U (en) | Short circuit tester of chip power supply circuit | |
| Bakhri et al. | Practical issues on negative sequence current monitoring for condition monitoring in induction motors | |
| WO2024130783A1 (en) | Test method, system and device for insulated bearing, and storage medium |
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: 20141105 |