CN111912544A - Experimental device for measuring temperature rise of winding - Google Patents
Experimental device for measuring temperature rise of winding Download PDFInfo
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- CN111912544A CN111912544A CN202010540423.8A CN202010540423A CN111912544A CN 111912544 A CN111912544 A CN 111912544A CN 202010540423 A CN202010540423 A CN 202010540423A CN 111912544 A CN111912544 A CN 111912544A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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Abstract
The invention provides an experimental device for measuring the temperature rise of a winding, which comprises: the temperature control device comprises a power box, a voltmeter, a current clamp, a plurality of temperature sensors, a temperature recorder and a voltage adjusting knob. An outgoing line of the power box is connected with a terminal of the winding, and power frequency voltage is transformed and rectified to provide heating power for the winding; the voltmeter is connected with the terminal of the winding and is used for measuring the voltage of the winding; the current clamp is arranged on the lead-out wire of the power box and used for measuring the current of the winding; a plurality of temperature sensors are attached to the surface of the winding to collect the surface temperature of the winding; the temperature recorder is connected with the temperature sensors and is used for recording the change condition of the surface temperature of the winding; the voltage adjusting knob is connected with a voltage regulator inside the power box and used for adjusting the output voltage of the power box. The invention realizes that the temperature rise of the winding is accurately measured while the winding is heated, thereby obtaining the temperature change rule of the winding in the heating process and providing guarantee for researching the insulating and heat-conducting property and the heat exchange of the winding.
Description
Technical Field
The invention relates to the field of electrical engineering, in particular to an experimental device for measuring the temperature rise of a winding.
Background
With the popularization of the high-efficiency energy-saving concept, the temperature field analysis is widely concerned in the industry. At present, the power of a motor and a transformer is continuously improved, the internal heat load of a device is increased, and the service life and the operation reliability of the device are influenced by overhigh temperature. Numerous researches show that the temperature rise of the winding is changed maximally in the running process of the motor and the transformer, so that the accurate acquisition of the temperature change of the winding in the running process of the motor and the transformer has important significance for further improving the performance, has key effects on estimating the service life and the insulation aging degree, and further provides favorable conditions for related researches on winding heat exchange.
Disclosure of Invention
The invention provides an experimental device for measuring the temperature rise of a winding, which aims to solve the problems in the background technology.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
an experimental apparatus for measuring winding temperature rise, comprising: the device comprises a power box 11, a voltmeter 12, a current clamp 13, a plurality of temperature sensors 14, a temperature recorder 15 and a voltage adjusting knob 19;
two outgoing lines 18 are led out from the power box 11, and the outgoing lines 18 are connected with terminals 17 of the winding 16 and used for heating the winding 16 and providing a heat source required by a temperature rise experiment; the voltmeter 12 is connected with the terminal 17 of the winding 16 and is used for measuring the voltage of the winding 16 during the experiment; the current clamp 13 is clamped on an outgoing line 18 of the power box 11 and used for measuring the current of the winding 16 in the experimental process; the temperature sensors 14 are attached to the surface of the winding 16 and used for collecting the surface temperature of the winding 16 in the experimental process; the temperature recorder 15 is connected with the temperature sensors 14 and used for recording the temperature change of the surface of the winding 16 in the experimental process; a voltage adjusting knob 19 is provided on the power box 11 for adjusting the output voltage of the power box 11, thereby ensuring different heating powers to be supplied to the windings 16.
Preferably, the power supply box 11 includes: an alternating current power supply 21, a voltage regulator 22, a transformer 23 and a rectifier 24;
the voltage adjusting knob 19 is connected with a voltage regulator 22, and the alternating current power supply 21 is connected with the voltage regulator 22 and used for supplying power; the voltage regulator 22 is also connected to the input terminal of the transformer 23 for regulating the voltage supplied by the ac power supply 21; the output end of the transformer 23 is connected with the rectifier 24 for reducing the high voltage output by the voltage regulator 22 to a low voltage; the rectifier 24 is also connected to the outlet 18 of the power box 11, and rectifies the ac voltage reduced by the transformer 23 into dc voltage to heat the winding 16.
Preferably, the number of temperature sensors 14 is 9, the winding 16 comprising: the temperature sensor comprises a straight section 31 and end section parts 32 positioned on two sides, wherein the straight section 31 is uniformly pasted with 3 temperature sensors 14, and the end section parts 32 on two sides are respectively pasted with 3 temperature sensors 14.
Preferably, the experimental process of the experimental device for measuring the temperature rise of the winding comprises the following steps: a heating process and a heat dissipation process, wherein the heating process is a process of electrifying the winding 16 within a heating time, and heating the winding 16 at a specific power, and the heating time is based on a time from the start of electrifying to the time when the temperature of the insulating surface of the winding 16 reaches a stable value; the heat dissipation process is a process of de-energizing the winding 16 and cooling the winding 16 within a heat dissipation time, which is based on a time from the start of de-energizing to a time when the temperature of the insulating surface of the winding 16 reaches room temperature.
The invention has the advantages that: the invention can record the temperature change condition of the winding surface while heating the winding, and the experimental device has convenient operation and simple experimental process, has important significance for further improving the performance of the motor and the transformer, and provides favorable conditions for the research of the heat exchange of the motor winding.
Drawings
The invention has the following drawings:
FIG. 1 is a schematic diagram of an experimental apparatus for measuring the temperature rise of a winding according to the present invention; the device comprises a power box 11, a voltmeter 12, a current clamp 13, a temperature sensor 14, a temperature recorder 15, a winding 16, a terminal 17, an outgoing line 18 and a voltage adjusting knob 19.
FIG. 2 is a schematic structural diagram of a power box in the experimental apparatus for measuring the temperature rise of the winding according to the present invention; wherein, the power supply comprises 21-an alternating current power supply, 22-a voltage regulator, 23-a transformer and 24-a rectifier.
FIG. 3 is a schematic diagram of the position of a winding surface temperature sensor during an experiment for measuring the temperature rise of a winding according to the present invention; wherein 31-straight section part, 32-end section part.
Detailed Description
The present invention is described in further detail below with reference to figures 1-3.
The invention provides an experimental device for measuring the temperature rise of a winding, which mainly comprises: the device comprises a power box 11, a voltmeter 12, a current clamp 13, a plurality of temperature sensors 14, a temperature recorder 15 and a voltage adjusting knob 19; the winding 16 is an experimental test winding, and two outgoing lines 18 are led out from the power box 11; the outgoing line 18 is connected with a terminal 17 of the winding 16 to heat the winding 16 and provide a heat source required by a temperature rise experiment; the voltmeter 12 is connected with the terminal 17 of the winding 16, and the voltage of the winding 16 is measured in the experimental process; the current clamp 13 is clamped on an outgoing line 18 of the power box 11, and the current of the winding 16 is measured in the experimental process; the temperature sensors 14 are attached to the surface of the winding 16 and used for collecting the surface temperature of the winding 16 in the experimental process; the temperature recorder 15 is connected with the temperature sensors 14 and used for recording the temperature change of the surface of the winding 16 in the experimental process; a voltage adjusting knob 19 is provided on the power box 11 for adjusting the output voltage of the power box 11 so as to ensure different heating powers to be supplied to the windings 16.
The power supply box 11 includes: an alternating current power supply 21, a voltage regulator 22, a transformer 23 and a rectifier 24; the voltage adjusting knob 19 is connected with a voltage regulator 22, and the alternating current power supply 21 is connected with the voltage regulator 22 and used for supplying power; the voltage regulator 22 is also connected to the input terminal of the transformer 23 for regulating the voltage supplied by the ac power supply 21; the output end of the transformer 23 is connected with the rectifier 24 for reducing the high voltage output by the voltage regulator 22 to a low voltage; the rectifier 24 is also connected to the outlet 18 of the power box 11, and rectifies the ac voltage reduced by the transformer 23 into dc voltage to heat the winding 16.
The number of temperature sensors 14 is 9, and the winding 16 includes: the temperature sensor comprises a straight section 31 and end section parts 32 positioned on two sides, wherein the straight section 31 is uniformly pasted with 3 temperature sensors 14, and the end section parts 32 on two sides are respectively pasted with 3 temperature sensors 14.
The experimental process for measuring the winding temperature rise by adopting the experimental device described by the invention is as follows: first, the lead-out wires 18 of the power box 11 are connected to the terminals 17 of the winding 16, ensuring that the power box 11 can supply heating power to the winding 16. Second, a voltmeter 12 was connected to the terminals 17 of the winding 16, and the voltage of the winding 16 was measured during the experiment. Third, the current clamp 13 is clamped to the outlet 18 of the power box 11, and the current of the winding 16 is measured during the experiment. Fourthly, attaching a plurality of temperature sensors 14 on the surface of the winding 16 for collecting the surface temperature of the winding 16 in the experimental process, wherein the specific attaching positions are shown in fig. 3, the winding 16 is attached with 9 temperature sensors 14, wherein 3 temperature sensors 14 are uniformly attached to a straight line section 31, and 3 temperature sensors are respectively attached to end section parts 32 on two sides; fifthly, connecting a temperature recorder 15 with a temperature sensor 14, and recording the temperature change of the surface of the winding 16 in the temperature rise experiment process; sixthly, 220V power frequency voltage is connected to the power box 11, the voltage adjusting knob 19 on the power box 11 is rotated, and the output voltage of the power box 11 is adjusted, so that different heating powers supplied to the winding 16 are guaranteed. Seventh, a heating process of energizing the winding 16 for a heating time, the heating time being based on a time from the start of energization to a time when the temperature of the insulating surface of the winding 16 reaches a steady state, and heating the winding 16 at a specific power; eighth, the heat dissipation process is performed by cutting off the power to the winding 16 within the heat dissipation time, and cooling the winding 16, wherein the heat dissipation time is based on the time from the start of the power cut to the time when the temperature of the insulating surface of the winding 16 reaches the room temperature.
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 changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Those not described in detail in this specification are within the skill of the art.
Claims (4)
1. An experimental apparatus for measuring temperature rise of a winding, comprising: the temperature control device comprises a power box (11), a voltmeter (12), a current clamp (13), a plurality of temperature sensors (14), a temperature recorder (15) and a voltage adjusting knob (19);
two outgoing lines (18) are led out from the power box (11), the outgoing lines (18) are connected with terminals (17) of the winding (16), and the power box (11) is used for heating the winding (16) and providing a heat source required by a temperature rise experiment; the voltmeter (12) is connected with the terminal (17) of the winding (16) and is used for measuring the voltage of the winding (16) in the experimental process; the current clamp (13) is clamped on an outgoing line (18) of the power box (11) and used for measuring the current of the winding (16) in the experimental process; the temperature sensors (14) are attached to the surface of the winding (16) and used for collecting the surface temperature of the winding (16) in the experimental process; the temperature recorder (15) is connected with the temperature sensors (14) and is used for recording the temperature change of the surface of the winding (16) in the experimental process; a voltage adjusting knob (19) is provided on the power supply box (11) for adjusting the output voltage of the power supply box (11) to thereby ensure different heating powers to be supplied to the windings (16).
2. Experimental device for measuring the temperature rise of windings according to claim 1, characterised in that said power box (11) comprises: an alternating current power supply (21), a voltage regulator (22), a transformer (23) and a rectifier (24);
the voltage adjusting knob (19) is connected with the voltage regulator (22), and the alternating current power supply (21) is connected with the voltage regulator (22) and used for supplying power; the voltage regulator (22) is also connected with the input end of the transformer (23) and is used for regulating the voltage supplied by the alternating current power supply (21); the output end of the transformer (23) is connected with the rectifier (24) and used for reducing the high voltage output by the voltage regulator (22) into low voltage; the rectifier (24) is also connected with an outgoing line (18) of the power box (11) and used for rectifying alternating current after voltage reduction of the transformer (23) into direct current to heat the winding (16).
3. Experimental device for measuring the temperature rise of windings according to claim 1, characterised in that the number of temperature sensors (14) is 9, the winding (16) comprising: the temperature sensor comprises a straight line section (31) and end section parts (32) positioned on two sides, wherein 3 temperature sensors (14) are uniformly pasted on the straight line section (31), and 3 temperature sensors (14) are respectively pasted on the end section parts (32) on the two sides.
4. The experimental apparatus for measuring winding temperature rise according to claim 1, wherein the experimental process of the experimental apparatus for measuring winding temperature rise comprises: a heating process and a heat dissipation process, wherein the heating process is a process of electrifying the winding (16) within a heating time and heating the winding (16) under a specific power, and the heating time is based on the time from the electrifying to the time when the temperature of the insulating surface of the winding (16) reaches a stable state; the heat dissipation process is a process of powering off the winding (16) within the heat dissipation time to cool the winding (16), and the heat dissipation time is based on the time from the power off to the time when the temperature of the insulating surface of the winding (16) reaches the room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540423.8A CN111912544A (en) | 2020-06-15 | 2020-06-15 | Experimental device for measuring temperature rise of winding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010540423.8A CN111912544A (en) | 2020-06-15 | 2020-06-15 | Experimental device for measuring temperature rise of winding |
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| CN111912544A true CN111912544A (en) | 2020-11-10 |
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| CN202010540423.8A Pending CN111912544A (en) | 2020-06-15 | 2020-06-15 | Experimental device for measuring temperature rise of winding |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61269079A (en) * | 1985-05-22 | 1986-11-28 | Mitsubishi Electric Corp | Temperature rise test for transformer |
| CN102868264A (en) * | 2012-09-17 | 2013-01-09 | 无锡航天万源新大力电机有限公司 | Stator winding hot-immersion and heating system and process |
| CN203909170U (en) * | 2014-05-22 | 2014-10-29 | 河南华泰特种电缆有限公司 | Wire load current and overload temperature rise tester |
| CN203909166U (en) * | 2014-05-20 | 2014-10-29 | 中华人民共和国东莞出入境检验检疫局 | A voltage transformer temperature rise measurement apparatus |
| CN104237288A (en) * | 2014-09-29 | 2014-12-24 | 国家电网公司 | Ring current heating method-based transformer insulation thermal ageing test method and device |
| CN204116257U (en) * | 2014-09-29 | 2015-01-21 | 国家电网公司 | A kind of transformer insulated thermal aging test device based on circular current heating |
| CN104316207A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Winding temperature real-time monitoring device and method used in transformer temperature rise test |
| CN105137254A (en) * | 2015-10-16 | 2015-12-09 | 哈尔滨理工大学 | Submersible transformer automatic detection system based on PLC and embedded system |
| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN108536187A (en) * | 2018-01-22 | 2018-09-14 | 赵文英 | A.T.C winding heats special DC power supply |
| CN110208631A (en) * | 2019-07-05 | 2019-09-06 | 中航创世机器人(西安)有限公司 | A kind of transformer overload test macro |
-
2020
- 2020-06-15 CN CN202010540423.8A patent/CN111912544A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61269079A (en) * | 1985-05-22 | 1986-11-28 | Mitsubishi Electric Corp | Temperature rise test for transformer |
| CN102868264A (en) * | 2012-09-17 | 2013-01-09 | 无锡航天万源新大力电机有限公司 | Stator winding hot-immersion and heating system and process |
| CN203909166U (en) * | 2014-05-20 | 2014-10-29 | 中华人民共和国东莞出入境检验检疫局 | A voltage transformer temperature rise measurement apparatus |
| CN203909170U (en) * | 2014-05-22 | 2014-10-29 | 河南华泰特种电缆有限公司 | Wire load current and overload temperature rise tester |
| CN104237288A (en) * | 2014-09-29 | 2014-12-24 | 国家电网公司 | Ring current heating method-based transformer insulation thermal ageing test method and device |
| CN204116257U (en) * | 2014-09-29 | 2015-01-21 | 国家电网公司 | A kind of transformer insulated thermal aging test device based on circular current heating |
| CN104316207A (en) * | 2014-10-31 | 2015-01-28 | 国家电网公司 | Winding temperature real-time monitoring device and method used in transformer temperature rise test |
| CN105137254A (en) * | 2015-10-16 | 2015-12-09 | 哈尔滨理工大学 | Submersible transformer automatic detection system based on PLC and embedded system |
| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN108536187A (en) * | 2018-01-22 | 2018-09-14 | 赵文英 | A.T.C winding heats special DC power supply |
| CN110208631A (en) * | 2019-07-05 | 2019-09-06 | 中航创世机器人(西安)有限公司 | A kind of transformer overload test macro |
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Application publication date: 20201110 |