WO2001006622A1 - Method and device for determining the width of a gap between a rotor and a stator - Google Patents

Method and device for determining the width of a gap between a rotor and a stator Download PDF

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Publication number
WO2001006622A1
WO2001006622A1 PCT/DE2000/002261 DE0002261W WO0106622A1 WO 2001006622 A1 WO2001006622 A1 WO 2001006622A1 DE 0002261 W DE0002261 W DE 0002261W WO 0106622 A1 WO0106622 A1 WO 0106622A1
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WO
WIPO (PCT)
Prior art keywords
air gap
width
camera
rotor
determining
Prior art date
Application number
PCT/DE2000/002261
Other languages
German (de)
French (fr)
Inventor
Jean-Claude Kemp
Kurt Tischler
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to CA002379150A priority Critical patent/CA2379150A1/en
Priority to AU66833/00A priority patent/AU6683300A/en
Priority to EP00954319A priority patent/EP1194996A1/en
Publication of WO2001006622A1 publication Critical patent/WO2001006622A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines

Definitions

  • the invention relates to a method and a device for determining the width of the air gap between the rotor and the stator of a rotating electrical machine, in particular an Rm motor.
  • the width of the air gap between the rotor and the stander is a critical size, particularly in the case of RMG motors. It is known to determine the width of the air gap by means of magnetic, capacitive or ultrasonic aostasis measurements. It is also known to determine the width of the air gap by measuring ⁇ es magr.et sc.en field m ventilation gap by means of Hall sensors.
  • the object of the invention is to provide a device or a method by means of which the width of the air gap between the rotor and the stator of a rotating electronic machine, in particular an RMG motor, can be determined more precisely.
  • the object is achieved according to the invention by a device according to claim 1 or a method according to claim 7.
  • a device according to claim 1 or a method according to claim 7. To determine the width of the air gap between the rotor and the stator of a rotating electrical machine (a generator or an electric motor), especially emes
  • a device for determining the 3re ⁇ te of the air gap between the rotor and stator of a rotating electrical machine, in particular a Rmgrnotors, has a camera for recording an image of the
  • Air gap By means of the invention it is possible to determine the width of the air gap between the stator and the rotor of a red ting electrical machine, in particular a Rmgmotors to determine more precisely than is possible with the known methods. Furthermore, the invention enables the width of the air gap to be determined more quickly than with the known methods. This applies in particular to measuring systems which are based on the measurement of the magnetic field in the air gap, since in such measurements, in order to avoid incorrect measurements, an average value over the pole of the electric motor on which the measurement is being carried out must be formed. The invention, however, allows multiple measurements per pole, so that even the shape of the pole can be mapped.
  • the device for determining the third of the air gap between the runner and the stander has an evaluation device for evaluating the image of the air gap recorded by the camera.
  • the evaluation device is designed to determine the width of the air gap by paying out pixels of the image of the air gap recorded by the camera.
  • the camera is designed as a line scan camera.
  • the device for determining the width of the air gap between the rotor and the stander has a light source for irradiating the air gap.
  • the light source is a laser.
  • FIG. 1 shows an exemplary embodiment of a device according to the invention for determining the width of the air gap between the stander and the runner
  • FIG. 2 shows an exemplary embodiment for the arrangement of a camera on a ring motor
  • FIG. 1 shows an exemplary embodiment of a device according to the invention for determining the width of the air gap 3 between the stator 1 and the rotor 2 of an electric motor, in particular an Rmg motor.
  • a camera 4 is provided for this.
  • the camera 4 has lasers with which the air gap 3 is illuminated.
  • Reference characters 5 designate the beams emitted by the lasers.
  • the optical axis 6 of the chamber 4 is aligned with the air gap 3 or m approximately with the air gap 3.
  • the camera 4 is connected to an evaluation device (not shown) which is obtained by paying out the pixels of the image of the Air gap 3 determines the width of the air gap. It is advantageously provided that the evaluation device can be calibrated.
  • Illumination of the air gap with lasers or a light source is optional.
  • a transmitted-light fan is also possible as an alternative.
  • the air gap is irradiated from the other side with a light source. In this way, the image of the air gap is lighter than the image of the stand 1 or the rotor 2.
  • two lines are generated with laser light, which then collide when the camera 4 is at a certain distance from the air gap 3. In this way, the distance of the camera 4 from the air gap 3 can be set particularly precisely.
  • FIG. 2 shows a cross section through a ring motor, reference numeral 1 designating the stator and reference numeral 2 or the rotor of the ring motor.
  • Reference number 3 denotes the air gap between the stander 1 and the runner 2.
  • a winding shield 7 is provided.
  • the camera 4 is particularly advantageous on the oem rotor 2 facing side of the winding slider 7 angeo dne.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

A method and device for determining the width of a gap (3) between a rotor (2) and a stator (1) in a rotating electric machine, especially an annular motor, whereby the device for determining the width of the gap (3) is provided with a camera (4) which records an image of said gap (3).

Description

VERFAHREN UND EINRICHTUNG ZUR BESTIMMUNG DER BREITE DES LUFTSPALTES ZWISCHEN LA UFER UND STANDERMETHOD AND DEVICE FOR DETERMINING THE WIDTH OF THE AIR GAP BETWEEN RUNNER AND STAND
Beschreibungdescription
Verfahren und Einrichtung zur Bestimmung der Breite des αftspaltes zwischen Laufer und Stander einer rotierenden ele nscnen Maschine, insbesondere eines RmgmotorsMethod and device for determining the width of the gap between the rotor and the stator of a rotating electrical machine, in particular an Rm motor
Die Erfindung betrifft ein Verfahren sowie eine Einrichtung zur Bestimmung der Breite des Luftspaltes zwischen Laufer und Stander einer rocierenden elektrischen Maschine, insoesondere eines Rmgmotors.The invention relates to a method and a device for determining the width of the air gap between the rotor and the stator of a rotating electrical machine, in particular an Rm motor.
Insoesondere bei Rmgmotoren ist die Breite des Luftspalts zwischen dem Laufer und dem Stander eine kritische Große. Es ist bekannt, die Breite des Luftspaltes durcn magnetiscne, kapazitive oder Ultraschall-Aostandsmessungen zu bestimmen. Es ist ferner bekannt die Breite des Luftspaltes durch Messung αes magr.et sc.en Feldes m Lαftspalt mittels Hallsensoren zu bestimmen.The width of the air gap between the rotor and the stander is a critical size, particularly in the case of RMG motors. It is known to determine the width of the air gap by means of magnetic, capacitive or ultrasonic aostasis measurements. It is also known to determine the width of the air gap by measuring αes magr.et sc.en field m ventilation gap by means of Hall sensors.
Aufgabe der Erfindung ist es, eine Einrichtung bzw. ein Verfahren anzugeben, mittels der bzw. dessen die Breite des Luftspaltes zwischen Laufer und Stander einer rotierenden elektnscnen Maschine, insoesondere eines Rmgmotors präziser bestimmt werden kann.The object of the invention is to provide a device or a method by means of which the width of the air gap between the rotor and the stator of a rotating electronic machine, in particular an RMG motor, can be determined more precisely.
D e Aufgabe wird erfmdungsgemaß durch eine Einrichtung gemäß Anspruch 1 bzw. ein Verfahren gemäß Anspruch 7 gelost. Dabei wird zur Bestimmung der Breite des Luftspaltes zwischen Laufer und Stander einer rotierenden elektrischen Maschine (eines Generators oder eines Elektromotors), insoesondere emesThe object is achieved according to the invention by a device according to claim 1 or a method according to claim 7. To determine the width of the air gap between the rotor and the stator of a rotating electrical machine (a generator or an electric motor), especially emes
Rmgmotors, die Breite des Luftspaltes mittels einer Kamera aufgenommen. Eine erfmdungsgemaße Einrichtung zur Bestimmung der 3reιte des Luftspaltes zwischen Laufer und Stander einer rotierenden elektrischen Maschine, insbesondere eines Rmgrno- tors, weist e ne Kamera zur Aufnahme eines Abbildes desRmgmors, the width of the air gap recorded by a camera. A device according to the invention for determining the 3reιte of the air gap between the rotor and stator of a rotating electrical machine, in particular a Rmgrnotors, has a camera for recording an image of the
Luftspaltes auf. Mittels der Erfindung ist es möglich, die Breite des Luftspaltes zwischen Stander und Laufer einer ro- tierenden elektrischen Maschine, insbesondere eines Rmgmotors, präziser zu bestimmen als dies mit den bekannten Verfahren möglich ist. Ferner ermöglicht die Erfindung eine schnellere Bestimmung der Breite des Luftspaltes als mit den bekannten Verfahren. Dies gilt insbesondere gegenüber Meßsystemen die auf der Messung des magnetischen Feldes im Luftspalt beruhen, da bei derartigen Messungen zur Vermeidung von Fehlmessungen ein Mittelwert über den Pol des Elektromotors, an dem d e Messung vorgenommen wird, gebildet werden muß. Die Erfindung erlaubt dagegen mehrere Messungen pro Pol, so daß sogar die Form des Pols abgebildet werden kann.Air gap. By means of the invention it is possible to determine the width of the air gap between the stator and the rotor of a red ting electrical machine, in particular a Rmgmotors to determine more precisely than is possible with the known methods. Furthermore, the invention enables the width of the air gap to be determined more quickly than with the known methods. This applies in particular to measuring systems which are based on the measurement of the magnetic field in the air gap, since in such measurements, in order to avoid incorrect measurements, an average value over the pole of the electric motor on which the measurement is being carried out must be formed. The invention, however, allows multiple measurements per pole, so that even the shape of the pole can be mapped.
In vorteilhafter Ausgestaltung der Erfindung weist die Einrichtung zur Bestimmung der 3reιte des Luftspaltes zwischen Laufer und Stander eine Auswerteeinrichtung zur Auswertung des mittels der Kamera aufgenommenen Abbildes des Luftspaltes auf .In an advantageous embodiment of the invention, the device for determining the third of the air gap between the runner and the stander has an evaluation device for evaluating the image of the air gap recorded by the camera.
In weiterhin vorteilhafter Ausgestaltung der Erfindung ist d e Auswerteeinrichtung die Breite des Luftspaltes durch Auszahlung von Pixeln des mittels der Kamera aufgenommenen Abbildes des Luftspaltes bestimmend ausgebildet.In a further advantageous embodiment of the invention, the evaluation device is designed to determine the width of the air gap by paying out pixels of the image of the air gap recorded by the camera.
In weiterhin vorteilhafter Ausgestaltung der Erfindung ist d e Kamera als Zeilenkamera ausgebildet ist.In a further advantageous embodiment of the invention, the camera is designed as a line scan camera.
In weiterhin vorteilhafter Ausgestaltung der Erfindung weist die Einrichtung zur Bestimmung der Breite des Luftspaltes zwischen L ufer und Stander eine Lichtquelle zur Bestrahlung des Luftspaltes auf.In a further advantageous embodiment of the invention, the device for determining the width of the air gap between the rotor and the stander has a light source for irradiating the air gap.
In weiterhin vorteilhafter Ausgestaltung der Erfindung ist die Lichtquelle ein Laser.In a further advantageous embodiment of the invention, the light source is a laser.
Weitere Vorteile und erfinderische Einzelheiten ergeben sicn auf der nachfolgenden Beschreibung von Ausfuhrungsbeispielen . Im einzelnen zeigen: FIG 1 em Ausfuhrungsbeispiel einer erfmdungsgemaßen Einrichtung zur Bestimmung der Breite des Luftspaltes zwischen Stander und Laufer,Further advantages and inventive details emerge from the following description of exemplary embodiments. In detail show: 1 shows an exemplary embodiment of a device according to the invention for determining the width of the air gap between the stander and the runner,
FIG 2 ein Ausfuhrungsbeispiel für die Anordnung einer Kamera an einem Ringmotor,2 shows an exemplary embodiment for the arrangement of a camera on a ring motor,
FIG 1 zeigt ein Aus uhrungsbeispiel für e ne erfmdungsgemaße Einrichtung zur Bestimmung der Breite des Luftspaltes 3 zwischen dem Stander 1 und dem Laufer 2 eines Elektromotors, insoesondere eines Rmgmotors. Dazu ist eine Kamera 4 vorgesehen. In beispielhaf er Ausgestaltung weist d e Kamera 4 Laser auf, mit denen der Luftspalt 3 angestrahlt wird. Bezugs- zeicnen 5 bezeichnet dabei die von den Lasern ausgesendeten Strahlen. Die optische Achse 6 der Kammer 4 ist auf den Luft- spalt 3 bzw. m etwa auf den Luftspalt 3 ausgerichtet. Mit der Kamera 4, die vorteilhaf erweise als Zahlenkamera ausge- o lcet st, wird em Ac ld des Luftspaltes 3 auf e.cmmer.. Die Kamera 4 ist mit einer nicht gezeigten Auswerteeinπch- tung verbunden, die durch Auszahlen der Pixel des Abbildes des Luftspaites 3 die Breite des Luftspaltes ermittelt. Es ist vorteilhafterweise vorgesehen, daß die Auswerteemπcn- tung kalibrierbar ist.1 shows an exemplary embodiment of a device according to the invention for determining the width of the air gap 3 between the stator 1 and the rotor 2 of an electric motor, in particular an Rmg motor. A camera 4 is provided for this. In an exemplary embodiment, the camera 4 has lasers with which the air gap 3 is illuminated. Reference characters 5 designate the beams emitted by the lasers. The optical axis 6 of the chamber 4 is aligned with the air gap 3 or m approximately with the air gap 3. The camera 4, which is advantageously implemented as a numerical camera, detects the air gap 3 on e.cmmer .. The camera 4 is connected to an evaluation device (not shown) which is obtained by paying out the pixels of the image of the Air gap 3 determines the width of the air gap. It is advantageously provided that the evaluation device can be calibrated.
Die Beleuchtung des Luftspaltes mit Lasern bzw. einer Licht- quelle ist optional. Neben der dargestellten Ausfuhrung, in der Luftspalt von der Seite bestrahlt wird, auf der auch die Kamera angeordnet ist, ist auch alternativ em Durchlichtver- fanren möglich. Dabei wird der Luftspalt von der anderen Seite mit einer Lichtquelle bestrahlt. Auf diese Weise ist das Abbild des Luftspaltes heller als das Abbild des Standers 1 bzw. des Laufers 2.Illumination of the air gap with lasers or a light source is optional. In addition to the embodiment shown, in which the air gap is irradiated from the side on which the camera is also arranged, a transmitted-light fan is also possible as an alternative. The air gap is irradiated from the other side with a light source. In this way, the image of the air gap is lighter than the image of the stand 1 or the rotor 2.
Wird auf eine zusätzliche Lichtquelle verzichtet, so ist es besonders vorteilhaft mit der Kamera 4 em Infrarotaobild vom Luftspalt 3 aufzunehmen und auszuwerten. Durch die Erwärmung von Stander 1 und Laufer 2 m Betrieb des Elektromotors wird auf diese Weise ein besonders guter Kontrast zum Luftspalt 3 erzeugt .If an additional light source is dispensed with, it is particularly advantageous to record and evaluate an infrared image of the air gap 3 with the camera 4. By heating stander 1 and runner 2 m operation of the electric motor is this creates a particularly good contrast to the air gap 3.
In vorteilhafter Weise werden, wie m FIG 1 dargestellt, zwei Linien mit Laserl cht erzeugt, die dann aufemanderfallen, wenn die Kamera 4 einen bestimmten Abstand vom Luftspalt 3 hat. Auf diese Weise kann der .Abstand der Kamera 4 vom Luftspalt 3 besonders präzise eingestellt werden.In an advantageous manner, as shown in FIG. 1, two lines are generated with laser light, which then collide when the camera 4 is at a certain distance from the air gap 3. In this way, the distance of the camera 4 from the air gap 3 can be set particularly precisely.
FIG 2 zeigt einen Querschnitt durch einen Ringmotor, dabei bezeichnet Bezugszeichen 1 den Stander und Bezugszeichen 2 oen Laufer des Ringmotors. Mit Bezugszeichen 3 ist der Luftspalt zwischen Stander 1 und Laufer 2 bezeichnet. Zum Schutz vor dem rotierenden Laufer 2 ist em Wicklungsschild 7 vor- gesehen. Dabei ist die Kamera 4 besonders vorteilhaft an der oem Laufer 2 zugewandten Seite des Wicklungsschiides 7 angeo dne . 2 shows a cross section through a ring motor, reference numeral 1 designating the stator and reference numeral 2 or the rotor of the ring motor. Reference number 3 denotes the air gap between the stander 1 and the runner 2. To protect against the rotating rotor 2, a winding shield 7 is provided. The camera 4 is particularly advantageous on the oem rotor 2 facing side of the winding slider 7 angeo dne.

Claims

Patentansprüche claims
1. Einrichtung zur Bestimmung der Breite des Luftspaltes (3) zwischen Laufer (2) und Stander (1) einer rotierenden elektrischen Maschine, insbesondere emes Rmgmotors, d a d u r c h g e k e n n z e i c h n e t, daß die Einrichtung zur Bestimmung der Breite des Luftspaltes (3) eine Kame¬ ra (4) zur Aufnahme eines Abbildes des Luftspaltes (3) auf¬ weist .1. A device for determining the width of the air gap (3) between the rotor (2) and stander (1) of a rotating electrical machine, in particular emes Rmgmors, characterized in that the device for determining the width of the air gap (3) a camera ( 4) has ¬ for receiving an image of the air gap (3).
2. Einrichtung nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß sie eine Auswerteeinrichtung zur Auswertung des mittels der Kamera (4) aufgenommenen Abbildes des Luftspaltes (3) aufweist.2. Device according to claim 1, d a d u r c h g e k e n n z e i c h n e t that it has an evaluation device for evaluating the image of the air gap (3) recorded by means of the camera (4).
3. Einrichtung nach Anspruch 2, d d c e n n z e c n e t, daß d e Aus wer - teemr cr.tung die Breite des Luftspalfes (3) euren Auszahlung von Pixeln des mittels der Kamera (4) aufgenommenen Bildes des Luftspaltes (3) bestimmend ausgebildet ist.3. The device as claimed in claim 2, so that the evaluation of the width of the air gap (3) determines your payment of pixels of the image of the air gap (3) recorded by the camera (4).
4. Einrichtung nach Anspruch 1, 2 oder 3, d a d u r c h g e k e n n z e i c h n e t, daß die Kamera (4) als Zellenkamera ausgebildet ist.4. Device according to claim 1, 2 or 3, d a d u r c h g e k e n n z e i c h n t that the camera (4) is designed as a cell camera.
5. Einrichtung nach Anspruch 1, 2, 3 oder 4, d a d u r c h g e k e n n z e i c h n e t, daß sie eine Lichtquelle zur Bestrahlung des Luftspaltes (3) aufweist.5. Device according to claim 1, 2, 3 or 4, d a d u r c h g e k e n n z e i c h n e t that it has a light source for irradiating the air gap (3).
6. Einrichtung nach Anspruch 1, 2, 3, 4 oder 5, d a d u r c h g e k e n n z e i c h n e t, daß die Lichtquelle ein Laser ist. 6. Device according to claim 1, 2, 3, 4 or 5, characterized in that the light source is a laser.
7. Verfahren zur Bestimmung der Breite des Luftspaltes (3) zwischen Laufer (2) und Stander (1) einer rotierenden elektrischen Maschine, insbesondere eines R gmotors, insbesondere mittels einer Emπcntung nach einem der vorhergehenden Ansprüche, d a d u r c h g e k e n n z e i c h n e t, daß die Breite des Luftspaltes (3) mittels einer Kamera (4) aufgenommen wird. 7. A method for determining the width of the air gap (3) between the rotor (2) and the stander (1) of a rotating electrical machine, in particular a R motor, in particular by means of a device according to one of the preceding claims, characterized in that the width of the air gap ( 3) is recorded by means of a camera (4).
PCT/DE2000/002261 1999-07-14 2000-07-12 Method and device for determining the width of a gap between a rotor and a stator WO2001006622A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002379150A CA2379150A1 (en) 1999-07-14 2000-07-12 Method and device for determining the width of the air gap between rotor and stator of a rotating electric machine, in particular an annular mo tor
AU66833/00A AU6683300A (en) 1999-07-14 2000-07-12 Method and device for determining the width of a gap between a rotor and a stator
EP00954319A EP1194996A1 (en) 1999-07-14 2000-07-12 Method and device for determining the width of a gap between a rotor and a stator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19932911.7 1999-07-14
DE1999132911 DE19932911A1 (en) 1999-07-14 1999-07-14 Method and device for determining the width of the air gap between the rotor and stator of a rotating electrical machine, in particular a ring motor

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WO2001006622A1 true WO2001006622A1 (en) 2001-01-25

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EP (1) EP1194996A1 (en)
AR (1) AR024738A1 (en)
AU (1) AU6683300A (en)
CA (1) CA2379150A1 (en)
DE (1) DE19932911A1 (en)
WO (1) WO2001006622A1 (en)

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CN104266597A (en) * 2014-07-03 2015-01-07 东莞市诺丽电子科技有限公司 Linear motor air gap on-line monitoring system
WO2017073137A1 (en) * 2015-10-29 2017-05-04 株式会社神戸製鋼所 Kneading-apparatus internal-inspection device
CN107328368A (en) * 2017-06-30 2017-11-07 中机国际工程设计研究院有限责任公司 Gap measurement device and method, the production line using this device between stator and rotor

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DE102009037990A1 (en) * 2009-08-20 2011-02-24 Alstom Technology Ltd. Electric machine e.g. asynchronous machine, has monitoring section extending in axial direction through air gap, where section monitors air gap for detecting change of geometry of rotor and/or penetration of foreign bodies into air gap
SI2422431T1 (en) 2009-04-24 2014-09-30 Alstom Renewable Technologies Electric machine comprising a rotor, a stator and a device for monitoring the air gap between rotor and stator
RU2469264C1 (en) * 2011-07-08 2012-12-10 Учреждение Российской Академии наук Институт теплофизики им. С.С. Кутателадзе Сибирского отделения РАН (ИТ СО РАН) Laser device to measure air gap of electric machine
DE102017212952A1 (en) * 2017-07-27 2019-01-31 Robert Bosch Gmbh Method and device for error analysis of speed detection

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Publication number Priority date Publication date Assignee Title
CN104266597A (en) * 2014-07-03 2015-01-07 东莞市诺丽电子科技有限公司 Linear motor air gap on-line monitoring system
WO2017073137A1 (en) * 2015-10-29 2017-05-04 株式会社神戸製鋼所 Kneading-apparatus internal-inspection device
JP2017083322A (en) * 2015-10-29 2017-05-18 株式会社神戸製鋼所 Internal inspection apparatus for kneaders
CN107328368A (en) * 2017-06-30 2017-11-07 中机国际工程设计研究院有限责任公司 Gap measurement device and method, the production line using this device between stator and rotor

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EP1194996A1 (en) 2002-04-10
CA2379150A1 (en) 2001-01-25
AU6683300A (en) 2001-02-05
AR024738A1 (en) 2002-10-23
DE19932911A1 (en) 2001-01-25

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