EP3853971A1 - Verahren zur temperaturüberwachung einer motorwicklung - Google Patents
Verahren zur temperaturüberwachung einer motorwicklungInfo
- Publication number
- EP3853971A1 EP3853971A1 EP19758702.5A EP19758702A EP3853971A1 EP 3853971 A1 EP3853971 A1 EP 3853971A1 EP 19758702 A EP19758702 A EP 19758702A EP 3853971 A1 EP3853971 A1 EP 3853971A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- motor
- electric motor
- pulse
- measuring line
- 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
- 238000004804 winding Methods 0.000 title claims abstract description 45
- 238000012544 monitoring process Methods 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title claims description 11
- 238000012806 monitoring device Methods 0.000 claims abstract description 15
- 238000011156 evaluation Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims abstract description 6
- 238000010168 coupling process Methods 0.000 claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 claims abstract description 6
- 229910002113 barium titanate Inorganic materials 0.000 claims description 11
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 10
- 230000001419 dependent effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000005684 electric field Effects 0.000 claims description 2
- 230000001939 inductive effect Effects 0.000 claims description 2
- 230000035699 permeability Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
-
- 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
- G01K13/04—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies
- G01K13/08—Thermometers specially adapted for specific purposes for measuring temperature of moving solid bodies in rotary movement
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K2007/166—Electrical time domain reflectometry
Definitions
- the invention relates to an electric motor with a Temperaturüberwachungsvorrich device and a method for monitoring the temperature of a motor winding of an electric motor.
- an electric motor with a stator with motor windings and with a temperature monitoring device for monitoring the temperature of at least one motor winding is proposed, the temperature monitoring device having an (insulated) measuring line in the area of the motor winding, which extends from a connection for coupling an electromagnetic pulse or signal extends to a measuring line end, the temperature monitoring device comprising a signal generating device for generating a has an electromagnetic pulse or signal and has a measuring device for measuring the signal transit time in the measuring line and an evaluation unit which is designed to determine the current temperature of the motor winding from the signal transit time (pulse transit time) currently being recorded.
- the runtime is itself a temperature-dependent variable based on the temperature-dependent permittivity of the dielectric of the pulse-conducting medium (here: measuring wire arrangement with insulation). By measuring the transit time of the introduced pulse, the temperature can therefore be determined via an evaluation.
- the measuring line is arranged along a stator section of the stator (preferably a stator tooth) in the region of a motor winding to be monitored.
- the stator tooth can be wound with the measuring line analogously to the actual motor winding, and furthermore the measurement takes place directly in the area of the motor winding, the temperature of which is to be recorded.
- the end of the measuring line is terminated or designed with a terminating resistor.
- a terminating resistor the technical design of a high-frequency resistor is called the z. B. for measuring purposes or to avoid reflections as a load at the end of a line. Termination resistors should have a particularly low induction design, which is why ground resistors are also used.
- the end of the measuring line can be connected directly to a stator tooth carrying the motor winding to be monitored, which then acts as a terminating resistor.
- the measuring line was first wound around a stator tooth, with which the motor winding is later wound.
- the measuring line is inside the motor winding and can be wound around the stator tooth using the same winding method or winding technology as the motor winding, which has manufacturing and economic advantages.
- a minimum permissible running time t mjn is predetermined (and preferably stored permanently) and the evaluation unit disconnects the voltage supply from the motor or falls below this running time t mi n or reduces the current consumption to a correspondingly lower value.
- This can e.g. B. at a pulse speed of less than 1/100 of the speed of light.
- a corresponding runtime can be defined as a limit value for the length of the relevant measuring section.
- the transit time of the pulse is determined by means of a computing operator from the pulse speed, which is dependent on the permittivity, for a known measuring line length, based on the following function with the evaluation unit:
- FIG. 3 of the description of preferred exemplary embodiments shows the functional relationship of the dielectric constant to temperature.
- stator teeth of the electric motor each of which is wound with a motor winding, have a
- Barium titanate layer (BaTi03 coating) are provided.
- Another aspect of the present invention relates to a method for monitoring the temperature of at least one (but preferably all) motor windings of an electric motor as described above, which comprises the following steps: a. Generating a pulse by means of the signal generating device and
- a current flow through the motor windings is interrupted or reduced or the voltage supply to the motor is completely disconnected when a limit temperature is reached, namely when the temperature falls below a predefined pulse duration, preferably when the temperature falls below one hundredth.
- FIG. 2 shows a detail from FIG. 1, which shows an exemplary stator tooth with a measuring line and 3 shows the functional relationship of the dielectric constant of
- FIG. 1 shows a schematic illustration of an electric motor with a stator 1 with motor windings 2 and with a temperature monitoring device 10.
- the temperature monitoring device 10 has a respective measurement line 20 for monitoring the temperature of the respective motor windings 2, which is arranged in the area of the respective motor winding 2, as can be seen in the detail in FIG.
- the measuring line 20 is wound around a stator tooth 11, namely below the actual motor winding. This means that the test lead is wound around the tooth on a barium titanate layer.
- the measuring line 20 extends from a connection 21 for coupling an electromagnetic pulse or signal up to a measuring line end 22 to which a terminating resistor 23 is attached.
- the temperature monitoring device 10 also has a signal generating device 30 for generating an electromagnetic pulse or signal and a measuring device 40 for measuring the signal transit time in the measuring line 20.
- an evaluation unit 50 is provided, which is designed to determine the current temperature of the respective motor winding 2 from the signal propagation time currently being recorded.
- the stator tooth is coated with a coating B made of barium titanate (BaTi03).
- FIG. 3 shows the functional relationship of the dielectric constant of barium titanate (BaTio3) to the temperature. This shows a significant increase in permittivity in the range around 120 ° C. If the winding temperature and thus the temperature of the barium titanate comes close to 120 ° C, the pulse speed changes from approx. C / 50 to approx. C / 100, which can be measured with a conventional measuring device for measuring pulse transit times.
- the embodiment of the invention is not limited to the preferred exemplary embodiments specified above. Rather, a number of variants are conceivable which make use of the solution explained, even in the case of fundamentally different types.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018133282.3A DE102018133282A1 (de) | 2018-12-21 | 2018-12-21 | Verfahren zur Temperaturüberwachung einer Motorwicklung |
| PCT/EP2019/072430 WO2020126126A1 (de) | 2018-12-21 | 2019-08-22 | Verahren zur temperaturüberwachung einer motorwicklung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3853971A1 true EP3853971A1 (de) | 2021-07-28 |
Family
ID=67742418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19758702.5A Pending EP3853971A1 (de) | 2018-12-21 | 2019-08-22 | Verahren zur temperaturüberwachung einer motorwicklung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3853971A1 (de) |
| CN (2) | CN210137258U (de) |
| DE (1) | DE102018133282A1 (de) |
| WO (1) | WO2020126126A1 (de) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9505769D0 (en) * | 1995-03-22 | 1995-05-10 | Switched Reluctance Drives Ltd | Pulsed temperature monitoring circuit and method |
| JP2001264378A (ja) * | 2000-03-17 | 2001-09-26 | Mitsubishi Electric Corp | 回転電機の部分放電計測方法 |
| JP2003090770A (ja) * | 2001-09-20 | 2003-03-28 | Babcock Hitachi Kk | 音波式ガス温度計測装置と方法 |
| DE502007003477D1 (de) * | 2007-09-06 | 2010-05-27 | Siemens Ag | Elektrodynamische Maschine mit Ständerwicklungstemperatur-Messeinrichtung |
| WO2009046751A1 (de) * | 2007-10-02 | 2009-04-16 | Abb Research Ltd | Verfahren zur bestimmung der temperaturverteilung entlang eines leiters |
| WO2009115127A1 (de) * | 2008-03-20 | 2009-09-24 | Siemens Aktiengesellschaft | Ortsaufgelöste temperaturmessung innerhalb eines räumlichen erfassungsbereiches |
| DE102013019839B4 (de) * | 2013-11-27 | 2016-10-06 | Karlsruher Institut für Technologie | Passiver Temperatursensor, Betrieb und Herstellung des Sensors |
| DE102013227051B4 (de) * | 2013-12-20 | 2017-03-30 | Leoni Kabel Holding Gmbh | Messanordnung und Verfahren zur Temperaturmessung sowie Sensorkabel für eine derartige Messanordnung |
| DE102015204219A1 (de) * | 2015-03-10 | 2016-09-15 | Robert Bosch Gmbh | Elektrische Maschine |
| EP3106890B1 (de) * | 2015-06-19 | 2025-08-13 | Arabelle Solutions France | Verfahren zur messung eines statorkerns einer elektrischen maschine und messvorrichtung |
| DE102016106431A1 (de) * | 2016-04-08 | 2017-10-12 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Temperaturüberwachung |
| DE102017001054A1 (de) * | 2017-02-03 | 2018-08-09 | Hannes Nordmann | Messanordnung und Verfahren für ortsaufgelöste Mehrfach-Temperaturmessung entlang eines Pfades. |
| CN107917768B (zh) * | 2017-10-18 | 2020-02-21 | 华北电力大学 | 一种基于低频声波的空气温度测量装置及方法 |
-
2018
- 2018-12-21 DE DE102018133282.3A patent/DE102018133282A1/de not_active Withdrawn
-
2019
- 2019-03-18 CN CN201920338744.2U patent/CN210137258U/zh not_active Expired - Fee Related
- 2019-08-22 WO PCT/EP2019/072430 patent/WO2020126126A1/de not_active Ceased
- 2019-08-22 EP EP19758702.5A patent/EP3853971A1/de active Pending
- 2019-08-22 CN CN201980077768.XA patent/CN113167661A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN113167661A (zh) | 2021-07-23 |
| DE102018133282A1 (de) | 2020-06-25 |
| WO2020126126A1 (de) | 2020-06-25 |
| CN210137258U (zh) | 2020-03-10 |
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