CN104198086B - Winding temperature rise test method and device - Google Patents
Winding temperature rise test method and device Download PDFInfo
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- CN104198086B CN104198086B CN201410419407.8A CN201410419407A CN104198086B CN 104198086 B CN104198086 B CN 104198086B CN 201410419407 A CN201410419407 A CN 201410419407A CN 104198086 B CN104198086 B CN 104198086B
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Abstract
The invention discloses a winding temperature rise test device. The winding temperature rise test device comprises a control unit, a temperature sensing unit, a first switch, a second switch and an interface unit, wherein the interface unit is provided with a power interface, a load interface and a sampling interface, the power interface is connected with a load power source, the load interface is connected with a to-be-tested load, the sampling interface is connected with the control unit, the first switch is arranged between the sampling interface and the control unit in a connecting mode, the first switch is provided with a controlled end, the controlled end of the first switch is connected with the control unit, the second switch is arranged between the power interface and the load power source in the connecting mode, the second switch is provided with a controlled end, the controlled end of the second switch is connected with the control unit, and the temperature sensing unit is connected with the control unit and used for measuring environment temperature. The invention further discloses a winding temperature rise test method. The winding temperature rise test device is low in costs and convenient to operate.
Description
Technical field
The present invention relates to field tests, more particularly, to winding temperature rise method of testing and device.
Background technology
For the electrical equipment that motor, transformator etc. have coil windings, its rated capacity is typically by winding insulation institute energy
The maximum permissible temperature born determine it is therefore desirable to temperature rise test is carried out to the winding of electrical equipment, can be born with obtaining it
High permission temperature.
The resistance value of the cold and hot generally by test winding for the winding temperature rise test, temperature value, then substitute into default
Temperature rise value is calculated in formula.The existing test hot resistance of winding typically has two methods, and one is to use powered winding temperature rise
Tester, two is to use circuit tester.But first method complex operation, as shown in figure 1, needing to destroy winding leads, will be powered
Winding temperature rise tester seals between power supply and winding, especially tests the motor of two windings.In addition, when test object is electricity
When holding run asynchronous motor, auxiliary winding be incorporated in fact after test loop again with motor rotation capacitances in series, so give secondary around
The voltage step-down of group, is had differences with voltage during real-world operation, temperature rise test result can be impacted, simultaneously purchase of equipment
Relatively costly.Second method test error is larger, needs power-off, stopping load, disconnection that test resistance is had an impact during test
Loop, then could measure resistance, the speed of above-mentioned action all makes a strong impact to test result.
Content of the invention
Present invention is primarily targeted at solve prior art winding temperature rise method of testing complex operation, test inaccurate
Technical problem.
For achieving the above object, the invention provides a kind of winding temperature rise test device, comprising: control unit, temperature-sensitive list
Unit, first switch, second switch and interface unit；Wherein,
Described interface unit has power interface, loading interfaces, Sampling Interface, and described power interface is with load power source even
Connect, loading interfaces are connected with load to be measured, and Sampling Interface is connected with described control unit；
Described first switch is connected between described Sampling Interface and described control unit, and described first switch also has
One controlled end, the controlled end of described first switch is connected with described control unit；
Described second switch is connected between described power interface and load power source, and described second switch also has one and is subject to
Control end, the controlled end of described second switch is connected with described control unit；
Described temperature-sensitive unit is connected with described control unit, for measuring environment temperature.
Preferably, described control unit includes some ad interfaces and i/o interface, and wherein said ad interface corresponds to connecting interface
The Sampling Interface unit of unit and temperature-sensitive unit, described i/o mouth is corresponding to connect the controlled end of first switch and being subject to of second switch
Control end.
Preferably, described winding temperature rise test device also includes display module, described display module and described control unit
Connect, the data to be shown for showing described control unit.
Preferably, described load as capacitor-run asynchronous motor and running capacitor, wherein said interface unit includes and institute
State the capacitive interface of running capacitor connection, described winding temperature rise test device also includes being connected to described running capacitor and electric capacity connects
Between mouthful the 3rd switchs, and described 3rd switch includes a controlled end, and the controlled end of described 3rd switch controls list with described
Unit connects.
Preferably, described load as electromagnetic valve.
Additionally, for achieving the above object, present invention also offers a kind of method of testing of winding temperature rise, walk including following
Rapid:
Control unit controls first switch closure；
Control unit controls the cold-state resistance of Sampling Interface collection load, controls temperature-sensitive unit collection first environment temperature；
Control unit controls first switch to disconnect, and controls second switch closure, and starts timing；
When first preset time reaches, control unit controls second switch to disconnect；
Postpone one second preset time, control unit controls first switch closure；
Control unit controls the hot resistance of Sampling Interface collection load, controls temperature-sensitive unit collection second environment temperature；
Described cold-state resistance, hot resistance, first environment temperature, second environment temperature are substituted into default public affairs by control unit
In formula, calculate the winding temperature rise obtaining load.
Preferably, described control unit also includes after calculating the step of winding temperature rise obtaining load:
Described control unit controls the winding temperature rise calculating acquisition to be shown.
Preferably, described load as capacitor-run asynchronous motor and running capacitor, the cold-state resistance of described load includes leading
Winding cold-state resistance and auxiliary winding cold-state resistance, the hot resistance of described load includes main winding hot resistance and auxiliary winding is hot
Resistance.
Preferably, described load as electromagnetic valve.
Preferably, described first preset time is 0.5～4 hour, and the second preset time is 1～10 second.
The embodiment of the present invention controls being turned on and off of first switch and second switch by control unit, to be measured to gather
The cold-state resistance of winding of load and hot resistance, and obtain ambient temperature using temperature-sensitive unit, therefore can be according to cold conditions electricity
Resistance, hot resistance and ambient temperature can calculate the temperature rise of the winding obtaining load to be measured.The winding temperature rise of the embodiment of the present invention
Test device low cost, operation facility.
Brief description
Fig. 1 is structural representation during existing winding temperature rise test；
Fig. 2 is the high-level schematic functional block diagram of winding temperature rise test device of the present invention；
Fig. 3 is applied to the structural representation of capacitor-run asynchronous motor for winding temperature rise test device of the present invention；
Fig. 4 is applied to the structural representation of electromagnetic valve for winding temperature rise test device of the present invention；
Fig. 5 is the schematic flow sheet of the method for testing first embodiment of winding temperature rise of the present invention；
Fig. 6 is the schematic flow sheet of the method for testing second embodiment of winding temperature rise of the present invention.
The realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of winding temperature rise test device.As shown in Fig. 2 this winding temperature rise test device mays include:
Control unit 10, temperature-sensitive unit 20, first switch 30, second switch 40 and interface unit 50；Wherein,
Described interface unit 50 has power interface 51, loading interfaces 52, a Sampling Interface 53, described power interface 51 with negative
Carry power supply 80 to connect, loading interfaces 52 are connected with load 90 to be measured, and Sampling Interface 53 is connected with described control unit 10；
Described first switch 30 is connected between described Sampling Interface 53 and described control unit 10, and described first switch
30 also have a controlled end 31, and the controlled end 31 of described first switch 30 is connected with described control unit 10；
Described second switch 40 is connected between described power interface 51 and load power source 80, and described second switch 40 is also
There is a controlled end 41, the controlled end 41 of described second switch 40 is connected with described control unit 10；
Described temperature-sensitive unit 20 is connected with described control unit 10, for measuring environment temperature.
Specifically, described control unit 10 may include some ad interfaces and some i/o interfaces.Wherein said ad interface corresponds to
The Sampling Interface 53 of connecting interface unit 50 and temperature-sensitive unit 20, the corresponding controlled end 31 connecting first switch 30 of described i/o mouth
Controlled end 41 with second switch 40.This ad interface is used for carrying out digital-to-analogue conversion from the data of ad interface collection.
The embodiment of the present invention controls being turned on and off, to adopt of first switch 30 and second switch 40 by control unit 10
The cold-state resistance of winding of collection load 90 to be measured and hot resistance, and obtain ambient temperature using temperature-sensitive unit 20, therefore permissible
The temperature rise of the winding obtaining load to be measured can be calculated according to cold-state resistance, hot resistance and ambient temperature.The embodiment of the present invention
Winding temperature rise test device low cost, operation facility.
Further, above-mentioned winding temperature rise test device also includes the display module 60 being connected with described control unit.Should
Display module 60 is used for showing described control unit 10 data to be shown, such as control unit 10 controls Sampling Interface 53 to gather
Cold-state resistance and hot resistance, temperature-sensitive unit 20 collection ambient temperature, and control unit 10 calculate obtain temperature rise.
As shown in figure 3, the load to be measured 90 that above-mentioned winding temperature rise test device is applied can be capacitor-run asynchronous motor
91 and the running capacitor 92 that mates with capacitor-run asynchronous motor.Due to the structure of this load 90 to be measured, then be adapted to it is connect
The capacitive interface 54 that mouth unit 50 also will include being connected with described running capacitor, and described winding temperature rise test device also includes company
It is connected on the 3rd switch 70 between described running capacitor 92 and capacitive interface 51, and described 3rd switch 70 includes a controlled end
71, the controlled end 71 of described 3rd switch 70 is connected with described control unit 10.
It is understood that because control unit 10 controls second switch 40 to be used for controlling capacitor-run asynchronous motor 91
Power supply or power-off, and when controlling second switch 40, also will control the 3rd switch 70 simultaneously.Therefore, the 3rd switch 70 be subject to
Control end 71 can be controlled by the same i/o interface of control unit 10 with the controlled end 41 of second switch 40.
Due to having main winding and auxiliary winding, the therefore Sampling Interface 53 of interface unit 50 inside capacitor-run asynchronous motor
Main winding Sampling Interface 531 and auxiliary winding Sampling Interface 532 will be included, to obtain the resistance of main winding and auxiliary winding.
As shown in figure 4, the load to be measured 90 that above-mentioned winding temperature rise test device is applied can also be electromagnetic valve.Due to this
The structure of load 90 to be measured, then the interface unit 50 being adapted to it only includes power interface 51, Sampling Interface 53, loading interfaces
52.
Accordingly, the test device based on above-mentioned winding temperature rise, present invention also offers a kind of test side of winding temperature rise
Method, as shown in figure 5, the method for testing of this winding temperature rise comprises the following steps:
Step s101, control unit control first switch closure；
Step s102, control unit control the cold-state resistance r1 of Sampling Interface collection load, control temperature-sensitive unit collection the
One ambient temperature t1；
Step s103, control unit control first switch to disconnect, and control second switch closure, and start timing；
When step s104, the first preset time reach, control unit controls second switch to disconnect；
After step s105, delay one second preset time, control unit controls first switch closure；
Step s106, control unit control the hot resistance r2 of Sampling Interface collection load, control temperature-sensitive unit collection the
Two ambient temperatures t2；
Step s107, control unit are by described cold-state resistance r1, hot resistance r2, first environment temperature t1, second environment
Temperature t2 substitutes in default formula, calculates the winding temperature rise obtaining load.
Difference according to load to be measured is specifically arranged by the setting of above-mentioned first preset time.The present embodiment
In, the span of the first preset time is 0.5～4 hour.For example to be measured load is capacitor-run asynchronous motor and the electricity that operates
Rong Shi, the first preset time is 4 hours.To be measured when loading as electromagnetic valve, the first preset time is 30 minutes.
Above-mentioned second preset time can not be too short or oversize.If delay time setting is too short, after motor power-off, because used
Property still rotate, and rotate produced by counter electromotive force will affect test data；If delay time arranges oversize, winding resistance value
Can reduce a lot, affect test accuracy.In the present embodiment, the span of the second preset time is 1～10 second.
In above-mentioned steps s106, control Sampling Interface is carried out the acquisition of winding resistance by control unit every the m second, and one
Obtain altogether n time, obtain ambient temperature t2 simultaneously.Wherein the span for 0.1～2, n for the span of m is 2～15.Then
Thermal resistance r2 according to below equation calculating winding:
R2=x1+ (t/s) * (((x1-x2)+(x2-x3)+...+(xn-1-xn))/(n-1))
Wherein t is delay time, and s gathers the acquisition interval of the hot resistance of winding for ad Sampling Interface, and n is collection time
Number, the resistance (ohm) that xn samples for n-th.
In above-mentioned steps s107, obtain load the cold-state resistance r1 of winding, hot resistance r2, first environment temperature t1,
After second environment temperature t2, the value being obtained is substituted in below equation, calculates and obtain winding temperature rise △ t:
Wherein, ka be constant, its winding material according to load to be measured and take different values, such as to copper winding, ka is
234.5；To aluminum winding, ka is 228.2.
Further, as shown in fig. 6, method of testing based on above-mentioned winding temperature rise, also wrap after above-mentioned steps s107
Include:
Step s108, described control unit control the winding temperature rise calculating acquisition to be shown.
After calculating acquisition winding temperature rise, then temperature rise can be carried out with the display module in the test device of controling winding temperature rise
Display, so that tester is checked.
These are only the preferred embodiments of the present invention, not thereby limit the present invention the scope of the claims, every using this
Equivalent structure or equivalent flow conversion that bright description and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of winding temperature rise test device is it is characterised in that described winding temperature rise test device includes: control unit, temperature-sensitive
Unit, first switch, second switch and interface unit；Wherein,
Described interface unit has power interface, loading interfaces, Sampling Interface, and described power interface is connected with load power source, bears
Carry interface to be connected with load to be measured, Sampling Interface is connected with described control unit；
Described first switch is connected between described Sampling Interface and described control unit, and described first switch also has one and is subject to
Control end, the controlled end of described first switch is connected with described control unit；
Described second switch is connected between described power interface and load power source, and described second switch also to have one controlled
End, the controlled end of described second switch is connected with described control unit；
Described temperature-sensitive unit is connected with described control unit, for measuring environment temperature.
2. winding temperature rise test device as claimed in claim 1 is it is characterised in that described control unit includes some ad interfaces
And i/o interface, the Sampling Interface of the corresponding connecting interface unit of wherein said ad interface and temperature-sensitive unit, described i/o interface correspondence
Connect the controlled end of first switch and the controlled end of second switch.
3. winding temperature rise test device as claimed in claim 1 is it is characterised in that described winding temperature rise test device also includes
Display module, described display module is connected with described control unit, the data to be shown for showing described control unit.
4. winding temperature rise test device as claimed in claim 1 is it is characterised in that described load is capacitor-run asynchronous motor
And running capacitor, wherein said interface unit includes the capacitive interface being connected with described running capacitor, described winding temperature rise test
Device also includes the 3rd switch being connected between described running capacitor and capacitive interface, and described 3rd switch to include one controlled
End, the controlled end of described 3rd switch is connected with described control unit.
5. winding temperature rise test device as claimed in claim 1 is it is characterised in that described load is electromagnetic valve.
6. a kind of method of testing of winding temperature rise is it is characterised in that be applied to winding temperature rise test dress as claimed in claim 1
Put, the method for testing of described winding temperature rise comprises the following steps:
Control unit controls first switch closure；
Control unit controls the cold-state resistance of Sampling Interface collection load, controls temperature-sensitive unit collection first environment temperature；
Control unit controls first switch to disconnect, and controls second switch closure, and starts timing；
When first preset time reaches, control unit controls second switch to disconnect；
Postpone one second preset time, control unit controls first switch closure；
Control unit controls the hot resistance of Sampling Interface collection load, controls temperature-sensitive unit collection second environment temperature；
Described cold-state resistance, hot resistance, first environment temperature, second environment temperature are substituted into default formula by control unit
In, calculate the winding temperature rise obtaining load.
7. the method for testing of winding temperature rise as claimed in claim 6 obtains load it is characterised in that described control unit calculates
The step of winding temperature rise after also include:
Described control unit controls the winding temperature rise calculating acquisition to be shown.
8. the method for testing of winding temperature rise as claimed in claim 6 is it is characterised in that described load is capacitor operation asyn electricity
Machine and running capacitor, the cold-state resistance of described load includes main winding cold-state resistance and auxiliary winding cold-state resistance, described load
Hot resistance includes main winding hot resistance and auxiliary winding hot resistance.
9. the method for testing of winding temperature rise as claimed in claim 6 is it is characterised in that described load is electromagnetic valve.
10. winding temperature rise as claimed in claim 6 method of testing it is characterised in that described first preset time be 0.5～
4 hours, the second preset time was 1～10 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419407.8A CN104198086B (en) | 2014-08-22 | 2014-08-22 | Winding temperature rise test method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410419407.8A CN104198086B (en) | 2014-08-22 | 2014-08-22 | Winding temperature rise test method and device |
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| CN104198086A CN104198086A (en) | 2014-12-10 |
| CN104198086B true CN104198086B (en) | 2017-01-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865443B (en) * | 2015-05-12 | 2017-12-26 | 株洲南车时代电气股份有限公司 | The automatic measurement system and its method of work of motor hot resistance |
| 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 |
| CN105988052B (en) * | 2015-10-23 | 2019-02-22 | 安徽中认倍佳科技有限公司 | Household electrical appliances motor winding temperature rise is in apparatus test device and method |
| CN105548879A (en) * | 2015-12-01 | 2016-05-04 | 珠海格力电器股份有限公司 | Method, circuit and motor of automatic test of motor temperature rise |
| CN107255528A (en) * | 2017-06-20 | 2017-10-17 | 山东省医疗器械产品质量检验中心 | A kind of medical electrical equipment direct current winding temperature rise test device and method of testing |
| CN109496269A (en) * | 2017-10-24 | 2019-03-19 | 深圳配天智能技术研究院有限公司 | The detection method for temperature rise of the temperature rise detecting device of robot, robot |
| CN113267271B (en) * | 2021-05-07 | 2023-11-28 | 广东白云学院 | Thermal state winding temperature rise test system and method |
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| GB0228771D0 (en) * | 2002-01-11 | 2003-01-15 | Sii Printek Inc | Temperature control device and temperature control method and ink-jet recording apparatus |
| CN102590747A (en) * | 2012-03-02 | 2012-07-18 | 北京理工大学 | Test system of temperature rise of motor winding and test method of the test system |
| CN103344915A (en) * | 2013-06-27 | 2013-10-09 | 深圳市汇川技术股份有限公司 | Synchronous motor temperature rise test system and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB0228771D0 (en) * | 2002-01-11 | 2003-01-15 | Sii Printek Inc | Temperature control device and temperature control method and ink-jet recording apparatus |
| CN102590747A (en) * | 2012-03-02 | 2012-07-18 | 北京理工大学 | Test system of temperature rise of motor winding and test method of the test system |
| CN103344915A (en) * | 2013-06-27 | 2013-10-09 | 深圳市汇川技术股份有限公司 | Synchronous motor temperature rise test system and method |
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| CN104198086A (en) | 2014-12-10 |
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