CN104198086A - Winding temperature rise test method and device - Google Patents
Winding temperature rise test method and device Download PDFInfo
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- CN104198086A CN104198086A CN201410419407.8A CN201410419407A CN104198086A CN 104198086 A CN104198086 A CN 104198086A CN 201410419407 A CN201410419407 A CN 201410419407A CN 104198086 A CN104198086 A CN 104198086A
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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, relate in particular to winding temperature rise method of testing and device.
Background technology
Concerning motor, transformer etc. have the electrical equipment of coil winding, the maximum permissible temperature that its rated capacity normally be can bear by winding insulation determines, therefore needs the winding of electrical equipment to carry out temperature rise test the maximum permissible temperature that can bear to obtain it.
Winding temperature rise test is generally by resistance value, the temperature value of the cold and hot of test winding, then in the default formula of substitution, calculates temperature rise value.The hot resistance of existing test winding generally has two kinds of methods, and the one, with charged winding temperature rise tester, the 2nd, use multimeter.But first method complicated operation, as shown in Figure 1, need to destroy winding leads, and charged winding temperature rise tester is sealed between power supply and winding, especially tests the motor of two windings.In addition, in the time that tested object is capacitor-run asynchronous motor, auxiliary winding equals to be incorporated to after test loop and motor rotation capacitances in series again, give like this voltage step-down of auxiliary winding, voltage during with real-world operation there are differences, temperature rise test result can be influenced, and the cost of purchase of equipment is higher simultaneously.Second method test error is larger, needs power-off, stops load, disconnects the test influential loop of resistance when test, then could measure resistance, and the speed of above-mentioned action all makes a strong impact to test result.
Summary of the invention
Fundamental purpose of the present invention is to solve prior art winding temperature rise method of testing complicated operation, tests inaccurate technical matters.
For achieving the above object, the invention provides a kind of winding temperature rise proving installation, comprising: control module, temperature-sensitive unit, the 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, and loading interfaces is connected with load to be measured, and Sampling Interface is connected with described control module;
Described the first switch is connected between described Sampling Interface and described control module, and described the first switch also has a controlled end, and the controlled end of described the first switch is connected with described control module;
Described second switch is connected between described power interface and load power source, and described second switch also has a controlled end, and the controlled end of described second switch is connected with described control module;
Described temperature-sensitive unit is connected with described control module, for measures ambient temperature.
Preferably, described control module comprises some AD interfaces and I/O interface, Sampling Interface unit and the temperature-sensitive unit of the corresponding connection interface module of wherein said AD interface, the corresponding controlled end of the first switch and the controlled end of second switch of connecting of described I/O mouth.
Preferably, described winding temperature rise proving installation also comprises display module, and described display module is connected with described control module, for the data that show that described control module will show.
Preferably, described load is capacitor-run asynchronous motor and running electric capacity, wherein said interface module comprises the capacitive interface being connected with described running electric capacity, described winding temperature rise proving installation also comprises the 3rd switch being connected between described running electric capacity and capacitive interface, and described the 3rd switch comprises a controlled end, and the controlled end of described the 3rd switch is connected with described control module.
Preferably, described load is solenoid valve.
In addition, for achieving the above object, the present invention also provides a kind of method of testing of winding temperature rise, comprises the following steps:
Control module control the first switch closure;
Control module control acquisition interface gathers the cold-state resistance of load, controls temperature-sensitive unit and gathers first environment temperature;
Control module control the first switch disconnects, and controls second switch closure, and starts timing;
When the first preset time arrives, control module control second switch disconnects;
Postpone one second preset time, control module control the first switch closure;
Control module control acquisition interface gathers the hot resistance of load, controls temperature-sensitive unit and gathers second environment temperature;
Control module, by formula default to described cold-state resistance, hot resistance, first environment temperature, the substitution of second environment temperature, calculates the winding temperature rise that obtains load.
Preferably, the step that described control module calculating obtains the winding temperature rise of load also comprises afterwards:
Described control module control is calculated the winding temperature rise obtaining and is shown.
Preferably, described load is capacitor-run asynchronous motor and running electric capacity, and the cold-state resistance of described load comprises main winding cold-state resistance and auxiliary winding cold-state resistance, and the hot resistance of described load comprises main winding hot resistance and auxiliary winding hot resistance.
Preferably, described load is solenoid valve.
Preferably, described the first preset time is 0.5～4 hour, and the second preset time is 1～10 second.
The unlatching of the embodiment of the present invention by control module control the first switch and second switch or close, to gather cold-state resistance and the hot resistance of winding of load to be measured, and utilize temperature-sensitive unit to obtain environment temperature, therefore can calculate according to cold-state resistance, hot resistance and environment temperature the temperature rise of the winding that obtains load to be measured.The winding temperature rise proving installation cost of the embodiment of the present invention is low, and operation is convenient.
Brief description of the drawings
Structural representation when Fig. 1 is existing winding temperature rise test;
Fig. 2 is the high-level schematic functional block diagram of winding temperature rise proving installation of the present invention;
Fig. 3 is the structural representation that winding temperature rise proving installation of the present invention is applied to capacitor-run asynchronous motor;
Fig. 4 is the structural representation that winding temperature rise proving installation of the present invention is applied to solenoid valve;
Fig. 5 is the schematic flow sheet of method of testing first embodiment of winding temperature rise of the present invention;
Fig. 6 is the schematic flow sheet of method of testing second embodiment of winding temperature rise of the present invention.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
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 proving installation.As shown in Figure 2, this winding temperature rise proving installation can comprise: control module 10, temperature-sensitive unit 20, the first switch 30, second switch 40 and interface unit 50; Wherein,
Described interface unit 50 has power interface 51, loading interfaces 52, Sampling Interface 53, and described power interface 51 is connected with load power source 80, and loading interfaces 52 is connected with load 90 to be measured, and Sampling Interface 53 is connected with described control module 10;
Described the first switch 30 is connected between described Sampling Interface 53 and described control module 10, and described the first switch 30 also has a controlled end 31, and the controlled end 31 of described the first switch 30 is connected with described control module 10;
Described second switch 40 is connected between described power interface 51 and load power source 80, and described second switch 40 also has a controlled end 41, and the controlled end 41 of described second switch 40 is connected with described control module 10;
Described temperature-sensitive unit 20 is connected with described control module 10, for measures ambient temperature.
Particularly, described control module 10 can comprise some AD interfaces and some I/O interfaces.Sampling Interface 53 and the temperature-sensitive unit 20 of the corresponding connecting interface of wherein said AD interface unit 50, the corresponding controlled end 31 of the first switch 30 and the controlled end 41 of second switch 40 of connecting of described I/O mouth.This AD interface is for carrying out digital-to-analog conversion from the data of AD interface collection.
The embodiment of the present invention is controlled the unlatching of the first switch 30 and second switch 40 or is closed by control module 10, to gather cold-state resistance and the hot resistance of winding of load 90 to be measured, and utilize temperature-sensitive unit 20 to obtain environment temperature, therefore can calculate according to cold-state resistance, hot resistance and environment temperature the temperature rise of the winding that obtains load to be measured.The winding temperature rise proving installation cost of the embodiment of the present invention is low, and operation is convenient.
Further, above-mentioned winding temperature rise proving installation also comprises the display module 60 being connected with described control module.The data of this display module 60 for showing that described control module 10 will show, for example control module 10 is controlled the environment temperature that cold-state resistance that acquisition interface 53 gathers and hot resistance, temperature-sensitive unit 20 gather, and control module 10 calculates the temperature rise obtaining.
As shown in Figure 3, the running electric capacity 92 that the applied load 90 to be measured of above-mentioned winding temperature rise proving installation can be capacitor-run asynchronous motor 91 and mates with capacitor-run asynchronous motor.Due to the structure of this load 90 to be measured, the interface unit 50 adaptive with it also will comprise the capacitive interface 54 being connected with described running electric capacity, and described winding temperature rise proving installation also comprises the 3rd switch 70 being connected between described running electric capacity 92 and capacitive interface 51, and described the 3rd switch 70 comprises a controlled end 71, the controlled end 71 of described the 3rd switch 70 is connected with described control module 10.
Be understandable that, because control module 10 is controlled power supply or the power-off of second switch 40 for control capacitance run asynchronous motor 91, and in the time controlling second switch 40, also will control the 3rd switch 70 simultaneously.Therefore, the controlled end 71 of the 3rd switch 70 can be controlled by the same I/O interface of control module 10 with the controlled end of second switch 40 41.
Because capacitor-run asynchronous motor inside has main winding and auxiliary winding, therefore the acquisition interface 53 of interface unit 50 will comprise main winding acquisition interface 531 and auxiliary winding acquisition interface 532, to obtain the resistance of main winding and auxiliary winding.
As shown in Figure 4, the applied load 90 to be measured of above-mentioned winding temperature rise proving installation can also be solenoid valve.Due to the structure of this load 90 to be measured, the interface unit 50 adaptive with it only comprises power interface 51, acquisition interface 53, loading interfaces 52.
Accordingly, based on the proving installation of above-mentioned winding temperature rise, the present invention also provides a kind of method of testing of winding temperature rise, and as shown in Figure 5, the method for testing of this winding temperature rise comprises the following steps:
Step S101, control module control the first switch closure;
Step S102, control module control acquisition interface gather the cold-state resistance R1 of load, control temperature-sensitive unit and gather first environment temperature T 1;
Step S103, control module control the first switch disconnect, and control second switch closure, and start timing;
When step S104, the first preset time arrive, control module control second switch disconnects;
After step S105, delay one second preset time, control module control the first switch closure;
Step S106, control module control acquisition interface gather the hot resistance R2 of load, control temperature-sensitive unit and gather second environment temperature T 2;
Step S107, control module, by formula default to described cold-state resistance R1, hot resistance R2, first environment temperature T 1,2 substitutions of second environment temperature T, calculate the winding temperature rise that obtains load.
Arranging of above-mentioned the first preset time will be carried out concrete setting according to the difference of load to be measured.In the present embodiment, the span of the first preset time is 0.5～4 hour.For example, when load to be measured is capacitor-run asynchronous motor and running electric capacity, the first preset time is 4 hours.When load to be measured is solenoid valve, the first preset time is 30 minutes.
Above-mentioned the second preset time can not be too short or oversize.If delay time setting is too short, after motor power-off, because inertia is still rotating, will affect test data and rotate the back electromotive force producing; If delay time arranges oversize, winding resistance value can reduce a lot, affects test accuracy.In the present embodiment, the span of the second preset time is 1～10 second.
In above-mentioned steps S106, control module carries out obtaining of winding resistance by controlling acquisition interface every M second, and obtains N time altogether, obtains environment temperature T2 simultaneously.The span that wherein span of M is 0.1～2, N is 2～15.Then calculate the thermal resistance R2 of winding according to following formula:
R2＝X1+(T/S)*(((X1-X2)+(X2-X3)+…+(Xn-1-Xn))/(N-1))
Wherein T is delay time, and S is the acquisition interval that AD acquisition interface gathers the hot resistance of winding, and N is times of collection, the resistance (ohm) that Xn is n sub-sampling.
In above-mentioned steps S107, after cold-state resistance R1, the hot resistance R2 of the winding of acquisition load, first environment temperature T 1, second environment temperature T 2, by the obtained following formula of value substitution, calculate and obtain winding temperature rise △ T:
Wherein, Ka is constant, and its winding material according to load to be measured is got different values, and for example, to copper winding, Ka is 234.5; To aluminium winding, Ka is 228.2.
Further, as shown in Figure 6, based on the method for testing of above-mentioned winding temperature rise, after above-mentioned steps S107, also comprise:
Step S108, described control module control are calculated the winding temperature rise obtaining and are shown.
Obtain after winding temperature rise calculating, can control display module in the proving installation of winding temperature rise and carry out the demonstration of temperature rise, check for tester.
These are only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a winding temperature rise proving installation, is characterized in that, described winding temperature rise proving installation comprises: control module, temperature-sensitive unit, the 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, and loading interfaces is connected with load to be measured, and Sampling Interface is connected with described control module;
Described the first switch is connected between described Sampling Interface and described control module, and described the first switch also has a controlled end, and the controlled end of described the first switch is connected with described control module;
Described second switch is connected between described power interface and load power source, and described second switch also has a controlled end, and the controlled end of described second switch is connected with described control module;
Described temperature-sensitive unit is connected with described control module, for measures ambient temperature.
2. winding temperature rise proving installation as claimed in claim 1, it is characterized in that, described control module comprises some AD interfaces and I/O interface, Sampling Interface unit and the temperature-sensitive unit of the corresponding connection interface module of wherein said AD interface, the corresponding controlled end of the first switch and the controlled end of second switch of connecting of described I/O mouth.
3. winding temperature rise proving installation as claimed in claim 1, is characterized in that, described winding temperature rise proving installation also comprises display module, and described display module is connected with described control module, for the data that show that described control module will show.
4. winding temperature rise proving installation as claimed in claim 1, it is characterized in that, described load is capacitor-run asynchronous motor and running electric capacity, wherein said interface module comprises the capacitive interface being connected with described running electric capacity, described winding temperature rise proving installation also comprises the 3rd switch being connected between described running electric capacity and capacitive interface, and described the 3rd switch comprises a controlled end, and the controlled end of described the 3rd switch is connected with described control module.
5. winding temperature rise proving installation as claimed in claim 1, is characterized in that, described load is solenoid valve.
6. a method of testing for winding temperature rise, is characterized in that, described winding temperature rise proving installation is winding temperature rise proving installation as claimed in claim 1, and the method for testing of described winding temperature rise comprises the following steps:
Control module control the first switch closure;
Control module control acquisition interface gathers the cold-state resistance of load, controls temperature-sensitive unit and gathers first environment temperature;
Control module control the first switch disconnects, and controls second switch closure, and starts timing;
When the first preset time arrives, control module control second switch disconnects;
Postpone one second preset time, control module control the first switch closure;
Control module control acquisition interface gathers the hot resistance of load, controls temperature-sensitive unit and gathers second environment temperature;
Control module, by formula default to described cold-state resistance, hot resistance, first environment temperature, the substitution of second environment temperature, calculates the winding temperature rise that obtains load.
7. the method for testing of winding temperature rise as claimed in claim 6, is characterized in that, the step that described control module calculates the winding temperature rise that obtains load also comprises afterwards:
Described control module control is calculated the winding temperature rise obtaining and is shown.
8. the method for testing of winding temperature rise as claimed in claim 6, it is characterized in that, described load is capacitor-run asynchronous motor and running electric capacity, the cold-state resistance of described load comprises main winding cold-state resistance and auxiliary winding cold-state resistance, and the hot resistance of described load comprises main winding hot resistance and auxiliary winding hot resistance.
9. the method for testing of winding temperature rise as claimed in claim 6, is characterized in that, described load is solenoid valve.
10. the method for testing of winding temperature rise as claimed in claim 6, is characterized in that, described the first preset time is 0.5～4 hour, and the second preset time is 1～10 second.
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| CN201410419407.8A CN104198086B (en) | 2014-08-22 | 2014-08-22 | Winding temperature rise test method and device |
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| CN201410419407.8A CN104198086B (en) | 2014-08-22 | 2014-08-22 | Winding temperature rise test method and device |
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Cited By (7)
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| CN104865443A (en) * | 2015-05-12 | 2015-08-26 | 株洲南车时代电气股份有限公司 | Automatic measurement system of motor hot resistance and work method thereof |
| 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 |
| CN105548879A (en) * | 2015-12-01 | 2016-05-04 | 珠海格力电器股份有限公司 | Automatic test method and circuit for motor temperature rise and motor |
| CN105988052A (en) * | 2015-10-23 | 2016-10-05 | 安徽中认倍佳科技有限公司 | Household electric appliance motor winding temperature rise on-machine test device and method |
| 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 |
| CN113267271A (en) * | 2021-05-07 | 2021-08-17 | 广东白云学院 | Thermal state winding temperature rise test system and method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104865443A (en) * | 2015-05-12 | 2015-08-26 | 株洲南车时代电气股份有限公司 | Automatic measurement system of motor hot resistance and work method thereof |
| 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 |
| CN105988052A (en) * | 2015-10-23 | 2016-10-05 | 安徽中认倍佳科技有限公司 | Household electric appliance motor winding temperature rise on-machine test device and method |
| 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 | Automatic test method and circuit for motor temperature rise and motor |
| 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 |
| CN113267271A (en) * | 2021-05-07 | 2021-08-17 | 广东白云学院 | Thermal state winding temperature rise test system and method |
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