CN1888919A - Method of dynamic synchronous testing post power-off winding resistance - Google Patents
Method of dynamic synchronous testing post power-off winding resistance Download PDFInfo
- Publication number
- CN1888919A CN1888919A CN 200610036569 CN200610036569A CN1888919A CN 1888919 A CN1888919 A CN 1888919A CN 200610036569 CN200610036569 CN 200610036569 CN 200610036569 A CN200610036569 A CN 200610036569A CN 1888919 A CN1888919 A CN 1888919A
- Authority
- CN
- China
- Prior art keywords
- resistance
- winding
- power
- dynamic
- winding resistance
- 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
Landscapes
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
A dynamic synchronized testing method for winding resistance value after power cut-off, includes the following steps: the testing resistance equipment connects with the untested winding and the computer; sets the testing resistance equipment at the resistance testing state and gives the appropriate measuring range; achieves the power cut-off delay timing, the computer retakes and saves the testing resistance data of the testing resistance equipment at the interval time point in order to gets the winding resistance value of every time interval points after the power cut-off. The invention can achieve the accurate correspondence of the interval time point after power cut-off and the time resistance data, the process of test is automatization.
Description
Technical field
The present invention relates to the safety detecting method of electric product, relate in particular to a kind of method dynamic synchronous testing post power-off winding resistance.
Background technology
Transformer/motor is widely used in the products such as electronic product, electric equipment products, lighting device, electric tool product, industry automatic control, and testing transformer/motor winding temperature rise with electric-resistivity method is the big event of electric product safety test.Concrete test formula is:
Δt＝(R
2-R
1)(X+t
1)/R
1-(t
2-t
1)
In the formula, for copper conductor winding X=234.5, for aluminum conductor winding X=225;
Δ t is temperature rise, K;
R
1For environment temperature is t
1, the resistance value of (before the energising) winding during on-test, Ω;
R
2The resistance value of (cutting off the power supply moment) winding when reaching off-test after the steady state (SS), Ω;
t
1Environment temperature during for on-test; t
2Environment temperature during for off-test.
R wherein
2Acquisition be difficult point, consider the equivalent inductance of transformer/motor winding, the influence of capacity effect, directly test also unrealistic to the resistance in zero moment of cutting off the power supply, GB19212.1-2003 " (power transformer, the safety general of supply unit and similar products requires and test ", GB4706.1-1998 " (safety general of family expenses and similar applications electrical equipment requires ", GB4943-2001 standards such as " safety of Information Technology Equipment " is reading each resistance measurement value after all stipulating to adopt outage usually as early as possible every the interval time of one section weak point, thereby determines the resistance value R of power-cut time with the time dependent curve of the resistance that draws
2
Because outage back winding resistance is at every moment all among continuous dynamic change, adopt timer independently such as stopwatch to determine the mode of power-off delay time and this time point digital versatile meter reading of manual observation, the one, be difficult to the fast-changing data of observed and recorded, the 2nd, each power-off delay time point is difficult to accurately corresponding with this constantly corresponding resistance data.Employing has the digital camera of the function of making video recording or digital video recorder (DV) though can check repeatedly, analyze the test process data variation, but still can't better overcome the above problems.Adopt the mode of direct current resistance bridge test resistance then also to exist governing speed not catch up with the problem of winding resistance pace of change.Above method needs two people or many people to cooperate simultaneously just and can be accomplished usually.
Summary of the invention
Shortcoming at prior art, the purpose of this invention is to provide a kind of method, solve the artificial fast-changing data of observed and recorded and each time point of outage back and the very difficult accurately corresponding problem of this moment resistance data of being difficult to that exists in the existing method of testing dynamic synchronous testing post power-off winding resistance.
To achieve these goals, technical scheme of the present invention is: a kind of method to dynamic synchronous testing post power-off winding resistance, it comprises the steps:
(1) will survey the resistance device is connected with winding to be measured, computing machine respectively;
(2) make survey resistance device be in the resistance test state and suitable range is set;
(3) realize the timing of power-off delay time, thus computing machine will survey the resistance device interval time point the storage of test resistance data retrieval obtain the winding resistance that put each interval time the outage back.
Described survey resistance device is a digital multimeter, computing machine is connected with the RS-232C communication interface or the IEEE-488 communication interface of digital multimeter, send instruction by computing machine and make digital multimeter be in the resistance test state and suitable range is set, by the time timing of computer realization power-off delay.
Described survey resistance device is the Dynamic Data Acquiring instrument, and this Dynamic Data Acquiring instrument mainly switches polling module by embedded digital multimeter and data to be formed.
Described winding is the winding of transformer or motor.
According to the winding resistance of outage back each of point and corresponding calculated mode zero constantly the winding resistance that obtains cutting off the power supply interval time.
Described account form is index return, linear regression, polynomial regression or hand-drawing line mode.
Compared with prior art, method of the present invention has realized the accurate corresponding of outage back point interval time and this moment resistance data, and need not manual observation and write down power-off delay time and resistance readings, makes test process automation, quick and precisely.
Description of drawings
Fig. 1 is a method flow block diagram of the present invention;
Fig. 2 is that the device that the present invention relates to connects block diagram.
Fig. 3 is a primary winding resistance change curve.
Embodiment
See also Fig. 1 and Fig. 2, the method to dynamic synchronous testing post power-off winding resistance of the present invention comprises the steps:
(101) will survey the resistance device is connected with winding to be measured, computing machine respectively;
(102) make survey resistance device be in the resistance test state and suitable range is set;
(103) realize the timing of power-off delay time, thus computing machine will survey the resistance device interval time point the storage of test resistance data retrieval obtain the winding resistance that put each interval time the outage back.
When surveying resistance device employing digital multimeter, because digital multimeter all is furnished with the RS-232C communication interface usually, what have has also matched the IEEE-488 communication interface, can work out Dos application program or window application for this reason, program is set up the contact communication between computing machine and the digital multimeter, sending instruction by computing machine makes digital multimeter be in the resistance test state and suitable range is set, the time timing of computer realization power-off delay, and the digital multimeter test resistance data retrieval Computer Storage of naming a person for a particular job in this interval time.According to the test data of each time point, can obtain the resistance-time changing curve after transformer/motor winding cuts off the power supply.
When surveying resistance device employing Dynamic Data Acquiring instrument, it mainly is made up of embedded digital multimeter (DMM) and data switching polling module.
Utilize the mode that the communication interface of digital multimeter combines with computer program or adopt Dynamic Data Acquiring instrument mode to realize the dynamic synchronization test of transformer/motor winding thermal resistance-time response, when promptly testing the continuous fast-changing winding thermal resistance in transformer/motor outage back, each power-off delay time point is accurate corresponding with this moment resistance data; Need not manual observation record power-off delay time and resistance readings, make test process automation, quick and precisely.The resistance test precision is guaranteed by the digital multimeter itself that employing digital multimeter or Dynamic Data Acquiring instrument include, has guaranteed the high precision of resistance test.
Below to utilize digital multimeter to realize that the dynamic synchronization test gained experimental data of Transformer Winding thermal resistance-time response is that example further specifies: send instruction by computing machine, winding outage back starts digital multimeter, make it to gather resistance data at interval in required time, table 1 is the resistance value measured data of certain primary winding every 3.3s.
Table 1
| t(s) | R(Ω) | t(s) | R(Ω) |
| 3.3 | 178.094 | 29.7 | 176.315 |
| 6.6 | 177.803 | 33.0 | 176.135 |
| 9.9 | 177.561 | 36.3 | 175.958 |
| 13.2 | 177.319 | 39.6 | 175.794 |
| 16.5 | 177.101 | 42.9 | 175.625 |
| 19.8 | 176.893 | 46.2 | 175.470 |
| 23.1 | 176.694 | 49.5 | 175.309 |
| 26.4 | 176.500 |
According to above-mentioned gained test data, see also Fig. 3, use regression Calculation, as index return, linear regression, polynomial regression etc. or hand-drawing line mode zero constantly the winding resistance R that can obtain cutting off the power supply
2, can be calculated as follows out winding temperature rise in conjunction with other test datas.
Δt＝(R
2-R
1)(X+t
1)/R
1-(t
2-t
1)
In the formula, for copper conductor winding X=234.5, for aluminum conductor winding X=225;
Δ t is temperature rise, K;
R
1For environment temperature is t
1, the resistance value of (before the energising) winding during on-test, Ω;
R
2The resistance value of (cutting off the power supply moment) winding when reaching off-test after the steady state (SS), Ω;
t
1Environment temperature during for on-test; t
2Environment temperature during for off-test.
The present invention utilizes the mode that the communication interface of digital multimeter combines with computer program or adopts Dynamic Data Acquiring instrument mode to realize the dynamic synchronization test of transformer/motor winding thermal resistance-time response, when promptly testing the continuous fast-changing winding thermal resistance in transformer/motor outage back, each power-off delay time point is accurate corresponding with this moment resistance data; Need not manual observation record power-off delay time and resistance readings, make test process automation, quick and precisely.The resistance test precision is guaranteed by the digital multimeter itself that employing digital multimeter or Dynamic Data Acquiring instrument include, has guaranteed the high precision of resistance test.
Claims (6)
1, a kind of method to dynamic synchronous testing post power-off winding resistance is characterized in that it comprises the steps:
(1) will survey the resistance device is connected with winding to be measured, computing machine respectively;
(2) make survey resistance device be in the resistance test state and suitable range is set;
(3) realize the timing of power-off delay time, thus computing machine will survey the resistance device interval time point the storage of test resistance data retrieval obtain the winding resistance that put each interval time the outage back.
2, the method to dynamic synchronous testing post power-off winding resistance as claimed in claim 1, it is characterized in that, described survey resistance device is a digital multimeter, computing machine is connected with the RS-232C communication interface or the IEEE-488 communication interface of digital multimeter, send instruction by computing machine and make digital multimeter be in the resistance test state and suitable range is set, by the time timing of computer realization power-off delay.
3, the method to dynamic synchronous testing post power-off winding resistance as claimed in claim 1, it is characterized in that, described survey resistance device is the Dynamic Data Acquiring instrument, and this Dynamic Data Acquiring instrument mainly switches polling module by embedded digital multimeter and data to be formed.
4, the method to dynamic synchronous testing post power-off winding resistance as claimed in claim 1 is characterized in that, described winding is the winding of transformer or motor.
5, as claim 1 or 2 or 3 or 4 described methods, it is characterized in that, according to the winding resistance of outage back each of point and corresponding calculated mode zero constantly the winding resistance that obtains cutting off the power supply to dynamic synchronous testing post power-off winding resistance interval time.
6, the method to dynamic synchronous testing post power-off winding resistance as claimed in claim 5 is characterized in that, described account form is index return, linear regression, polynomial regression or hand-drawing line mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610036569 CN1888919A (en) | 2006-07-18 | 2006-07-18 | Method of dynamic synchronous testing post power-off winding resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610036569 CN1888919A (en) | 2006-07-18 | 2006-07-18 | Method of dynamic synchronous testing post power-off winding resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1888919A true CN1888919A (en) | 2007-01-03 |
Family
ID=37578206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610036569 Pending CN1888919A (en) | 2006-07-18 | 2006-07-18 | Method of dynamic synchronous testing post power-off winding resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1888919A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825661A (en) * | 2010-05-18 | 2010-09-08 | 宁波大学 | Instrument for dynamically measuring high resistance |
| CN103376362A (en) * | 2012-04-25 | 2013-10-30 | 珠海格力电器股份有限公司 | Method and device for detecting resistance value and phase commutation position of reluctance machine winding |
| CN103954872A (en) * | 2014-05-20 | 2014-07-30 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| CN104977490A (en) * | 2015-07-03 | 2015-10-14 | 巢湖市金辉自控设备有限公司 | Temperature-rise test method for transformer |
| CN105699897A (en) * | 2016-03-31 | 2016-06-22 | 山东省计量科学研究院 | Motor rotation blockage winding measurement device |
| CN114113836A (en) * | 2021-11-15 | 2022-03-01 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experiment device and method for isolation transformer |
-
2006
- 2006-07-18 CN CN 200610036569 patent/CN1888919A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825661A (en) * | 2010-05-18 | 2010-09-08 | 宁波大学 | Instrument for dynamically measuring high resistance |
| CN101825661B (en) * | 2010-05-18 | 2011-12-28 | 宁波大学 | Instrument for dynamically measuring high resistance |
| CN103376362A (en) * | 2012-04-25 | 2013-10-30 | 珠海格力电器股份有限公司 | Method and device for detecting resistance value and phase commutation position of reluctance machine winding |
| CN103954872A (en) * | 2014-05-20 | 2014-07-30 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| CN103954872B (en) * | 2014-05-20 | 2017-04-26 | 中华人民共和国东莞出入境检验检疫局 | Transformer temperature rise measuring device and method |
| CN104977490A (en) * | 2015-07-03 | 2015-10-14 | 巢湖市金辉自控设备有限公司 | Temperature-rise test method for transformer |
| CN105699897A (en) * | 2016-03-31 | 2016-06-22 | 山东省计量科学研究院 | Motor rotation blockage winding measurement device |
| CN114113836A (en) * | 2021-11-15 | 2022-03-01 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experiment device and method for isolation transformer |
| CN114113836B (en) * | 2021-11-15 | 2023-10-27 | 中煤科工集团沈阳研究院有限公司 | Temperature rise experimental device and method for isolation transformer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1888919A (en) | Method of dynamic synchronous testing post power-off winding resistance | |
| CN202033454U (en) | Automatic circuit board test system | |
| CN105301413B (en) | Motor driver bus electrolytic capacitor lifetime estimation method | |
| CN104048736B (en) | The test system of fuel sensor | |
| CN104374421A (en) | Transducer for measuring tiny water in oil and method for on-line real-time monitoring of temperature and humidity in oil | |
| CN102565537B (en) | A kind of slip testing system of electric contact simulation | |
| CN103278263A (en) | Intelligent verification system of pressure type thermometers | |
| CN108957380B (en) | Development of transformation ratio and polarity test instrument of capacitor voltage transformer | |
| CN111123047B (en) | Integrated automatic detection system for wire and cable voltage and insulation resistance tests | |
| CN104977451A (en) | Method of detecting current in a shunting way by current sensor | |
| CN2777569Y (en) | Digital current transformer character integrated measurer | |
| CN2702317Y (en) | Resistance instrument scaling method calibration circuit | |
| CN1389963A (en) | Aging and screening equipment and method of semiconductor laser | |
| CN1645119A (en) | Automatic testing method, apparatus and use for slit appear time | |
| CN203323920U (en) | Intelligent verification system for pressure-type thermometer | |
| CN1588102A (en) | Breakdown test method for medium relative to time in high temperature constant electric field | |
| CN109738116B (en) | Calibration method and device for flexible pressure sensor | |
| CN2779388Y (en) | Quick corrosion inhibitor evaluation instrument | |
| CN1828312A (en) | Cement base composite material resistance determinator | |
| CN115542128A (en) | Real-time power consumption test evaluation device and evaluation method for digital integrated circuit | |
| CN103344830A (en) | New closing phase angle detection method | |
| CN110609246A (en) | Air gap magnetic field intensity measuring method and device of high-temperature superconducting direct current induction heater | |
| CN109048023A (en) | A kind of electric motor of automobile stator lead welding monitoring system and its monitoring method | |
| CN109001104A (en) | A kind of local environment erosion analysis method based on high-throughput device electricity | |
| CN104656048B (en) | A kind of calibration method of switch action characteristic testing stand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20070103 |