SI9400114A

SI9400114A - Improved system and method for testing electrical generators

Info

Publication number: SI9400114A
Application number: SI9400114A
Authority: SI
Inventors: George Franklin Dailey; James Alan Bauer; Mark William Fischer
Original assignee: Westinghouse Electric Corp
Priority date: 1994-03-04
Filing date: 1994-03-04
Publication date: 1995-10-31

Abstract

Sistem in postopek za preizkušanje električnega generatorja tipa, ki ima rotor (14) in stator (12), obsega ali uporablja premičen voziček (22), ki ima opremo za preizkušanje in katerega velikost omogoča prehod med rotorjem (14) in statorjem (12) in ki se lahko namesti nad izbrano režo statorja (12) tako, da je v stanju, da aksialno prečka izbrano režo statorja (12), nadalje vsaj eno tipalo za zaznavanje, če je premičen voziček (22) središčen v optimalnem položaju glede na izbrano režo statorja (12), in konstrukcijo za središčenje premečnega vozička (22) glede na optimalen položaj, če tipalo označuje, da premičen viziček (22) ni tako središčen, pri čemer je natančnost kateregakoli preizkušanja z opremo za preizkušanje optimizirana.System and procedure for testing electrical a type generator having a rotor (14) and a stator (12), comprises or uses a movable trolley (22) which has testing equipment and the size of which it allows the passage between the rotor (14) and the stator (12) and which can be positioned above the selected stator slot (12) such that is able to axially cross the selected stator slot (12), further at least one detection sensor, if any movable trolley (22) centered in the optimum position according to the selected stator slot (12), and construction for trolley centering (22) relative to the optimum position if the sensor indicates that the movable visor (22) is not so centered as it is the accuracy of any testing with equipment for testing optimized.

Description

Izboljšan sistem in postopek za preizkušanje električnih generatorjevImproved system and procedure for testing electrical generators

Ta izum se nasploh nanaša na sisteme in postopke za preizkušanje elektrodinamične opreme, kot so to električni generatorji. Bolj podrobno se ta izum nanaša na izboljšan voziček za izvajanje takšnega preizkušanja.The present invention generally relates to systems and procedures for testing electrodynamic equipment, such as electrical generators. In more detail, the present invention relates to an improved trolley for carrying out such testing.

Westinghouse Electric Company, pooblaščenec za ta izum, je razvila več daljinsko krmiljenih vozičkov, ki lahko vstopajo v zračno režo električnega generatorja, da bi izvajala različne inšpekcije. Takšne inšpekcije lahko obsegajo vidne preiskave statorja in rotorja generatorja, preizkušanje glede na električne kratke stike v laminacijah statorja generatorja in preizkušanje tesnosti klinov statorja v reži statorja. Takšni vozički so opisani v patentih ZDA št. 4,803.563, 4,962.660, 4,970.890 in 5,020.234.The inventor of Westinghouse Electric Company has developed several remote-controlled trolleys that can enter the air gap of an electric generator to perform various inspections. Such inspections may include visible examinations of the stator and generator rotor, testing for electrical short circuits in the stator generator lamination, and testing for the tightness of the stator wedges in the stator slot. Such carts are described in U.S. Pat. No. 4,803,563, 4,962,660, 4,970,890 and 5,020,234.

Takšni inšpekcijski vozički so tipično pritegnjeni ob železo statorja z uporabo trajnih magnetov, ki so nameščeni na vozičku. V mnogih zasnovah električnih generatorjev se nahaja med klini statorja in železom statorja reža, in to omogoča vozičekom, da se jih vodi vzdolž rež statorja z uporabo tankih vodil, ki sedijo v reži statorja, kar preprečuje, da bi voziček zašel v drugo režo statorja. Vendar pa neke zasnove generatorjev ne obsegajo takšne reže. V teh generatorjih je težko natančno voditi inšpekcijski voziček vzdolž reže statorja, ki se jo naj inspicira. Če se inšpekcijski voziček glede na režo statorja napačno naravna, je lahko natančnost preizkušanja prizadeta.Such inspection trolleys are typically fastened to the stator iron using permanent magnets mounted on the trolley. In many electric generator designs, it is located between the stator wedges and the stator iron gap, and this allows the carts to be guided along the stator slots using thin guides that sit in the stator slot, preventing the cart from sliding into another stator slot. However, some generator designs do not include such a slot. In these generators, it is difficult to accurately guide the inspection cart along the stator slot to be inspected. If the trolley is incorrectly adjusted relative to the stator slot, the accuracy of the test may be affected.

Dodatno so inšpekcijski vozički običajno priključeni na krmilno enoto s krmilnim kablom. V nekaterih stanjih lahko teža krmilnega kabla ali druge sile, povzročene s kablom, učinkujejo na gibanje vozička vzdolž reže statorja, ki se naj preizkuša.Additionally, inspection trolleys are usually connected to the control unit by a control cable. In some conditions, the weight of the control cable or other force induced by the cable may affect the movement of the cart along the slot of the stator to be tested.

Razumljivo je, da obstaja v stanju tehnike že dolgo neizpolnjena potreba po daljinsko vodenem vozičku za preizkušanje električnih generatorjev, ki lahko natančno prečka režo statorja brez uporabe mehanskega vodila in ki je izoliran pred silami, ki se prenašajo prek krmilnega kabla.It is understood that there is a long-standing need for a remote controlled trolley for testing electrical generators that can cross the stator slot accurately without the use of a mechanical guide and which is insulated against forces transmitted through the control cable.

Glede na to je prvi predmet izuma podajanje daljinsko krmiljenega vozička za inšpekcijo električnega generatorja, ki je izoliran pred silami, ki bi mogoče drugače prenašale na voziček prek krmilnega kabla.Accordingly, the first object of the invention is to supply a remote-controlled trolley for the inspection of an electric generator isolated from forces that might otherwise be transmitted to the trolley via a control cable.

Z namenom, da bi se doseglo zgoraj navedeni in druge cilje izuma obsega sistem v skladu s prvim vidikom izuma za izvajanje preizkušanja na električnem generatorju tipa, ki ima rotor in stator, pri čemer ima stator notranji obod, ki določa prostor, znotraj katerega je zaradi rotacije pritrjen rotor, ter obsega notranji obod magnetljiv material, v katerem je določenih več aksialnih statorskih rež, premičen voziček, katerega velikost omogoča prehod med statorjem in rotorjem in se lahko namesti nad izbrano režo statorja tako, da je v stanju, da aksialno prečka izbrano režo statorja, pri čemer je naveden voziček prirejen tako, da ima na sebi pritrjeno opremo za preizkušanje, tipalno strukturo za zaznavanje, če je premičen voziček središčen v optimalnem položaju glede na izbrano režo statorja, in strukturo za središčenje za središčenje premičnega vozička glede na optimalen položaj, če tipalna struktura pokazuje, da premičen voziček ni tako središčen, pri čemer je natančnost vsakega preizkušanja z opremo za preizkušanje optimizirana.In order to achieve the above and other objects of the invention, the system according to the first aspect of the invention for performing testing on an electric generator of the type having a rotor and a stator, the stator having an inner circumference defining the space within which The rotor is mounted in the rotation and comprises an inner circumference of magnetic material, in which several axial stator slots are defined, a movable trolley whose size allows passage between the stator and the rotor and can be positioned above the selected stator slot so that it is able to cross the selected axially the stator slot, wherein said trolley is adapted to have test equipment attached, a sensing structure for detecting if the moving trolley is centered in the optimal position relative to the stator slot selected, and a centering structure to center the trolley relative to the optimum position if the touch probe indicates that the movable trolley is not so centered, at approx emer, the accuracy of each test with optimized testing equipment is optimized.

V skladu z drugim vidikom izuma obsega sistem za izvajanje preizkušanja na takšnem električnem generatorju premičen voziček, katerega velikost omogoča prehod med rotorjem in statorjem in se lahko namesti nad izbrano režo statorja tako, da je v stanju, da aksialno prečka izbrano režo statorja, pri čemer je naveden voziček prirejen tako, da ima na sebi pritrjeno opremo za preizkušanje, in strukturo za središčenje premičnega vozička glede na optimalen položaj nad režo, pri čemer struktura za središčenje ne obsega mehanskega vodila.According to another aspect of the invention, the system for performing testing on such an electric generator is a movable trolley, the size of which allows passage between the rotor and the stator and can be positioned above the selected stator slot so that it is able to axially cross the selected stator slot, wherein said trolley is adapted to be fitted with testing equipment and a structure for the center of the movable trolley with respect to the optimum position above the slot, the structure having no mechanical guide.

V skladu s tretjim vidikom izuma obsega postopek za izvajanje preizkusa na takšnem električnem generatorju faze (a) nameščanja premičnega vozička nad izbrano režo statorja tako, da je v stanju, da aksialno prečka izbrano režo statorja, pri čemer ima voziček na sebi pritrjeno opremo za preizkušanje; (b) izvajanje preizkušanja z opremo za preizkušanje; (c) zaznavanje, če je premičen voziček središčen v optimalnem položaju glede na izbrano režo statorja; in (d) središčenje premičnega vozička glede na optimalen položaj, če premičen voziček ni tako središčen, pri Čemer je natančnost kateregakoli preizkušanja z opremo za preizkušanje optimizirana.According to a third aspect of the invention, the method of performing the test on such an electric generator of phase (a) of installing a movable trolley above the selected stator slot is such that it is able to axially cross the selected stator slot, with the trolley having test equipment attached to it ; (b) conducting testing with testing equipment; (c) detecting if the movable trolley is centered in the optimal position relative to the stator slot selected; and (d) centering the movable trolley with respect to its optimal position if the movable trolley is not so centered, whereby the accuracy of any test with the test equipment is optimized.

Sistem po četrtem vidiku izuma za izvajanje preizkusa na takšnem električnem generatorju obsega premičen voziček, katerega velikost omogoča prehod med rotorjem in statorjem in se lahko namesti nad izbrano režo statorja tako, daje v stanju, da aksialno prečka izbrano režo statorja, pri čemer je naveden voziček prirejen tako, da ima na sebi pritrjeno opremo za preizkušanje, da ima premičen voziček nadalje nanj pritrjen kabel in konstrukcijo za podpiranje kabla ob premičnem vozičku za podpiranje kabla, pri čemer je premičen voziček zaščiten pred silami, ki bi se drugače lahko prek kabla prenašale na premičen voziček.The system of the fourth aspect of the invention for performing the test on such an electric generator comprises a movable trolley, the size of which allows passage between the rotor and the stator, and can be positioned above the selected stator slot so that it is able to axially cross the selected stator slot, said stroller Adapted to be fitted with testing equipment, a movable trolley having a cable attached to it and a cable support structure adjacent to the mobile trolley to support the cable, the movable trolley being protected against forces that might otherwise be transmitted through the cable to a moving trolley.

Te in različne druge prednosti in lastnosti novosti, ki označujejo izum, so poudarjene posebno v zahtevkih, ki so na to priključeni in tvorijo del tega. Vendar pa je treba za boljše razumevanje izuma, njegovih prednosti in predmetov, doseženih z njegovo uporabo, upoštevati tudi risbe, ki tvorijo njegov nadaljnji del, in priložen opisni del, v katerem je ponazorjena in opisana prednostna izvedba izuma.These and various other advantages and features of the novelty that characterize the invention are highlighted especially in the claims attached thereto and form part of it. However, for a better understanding of the invention, its advantages and the objects achieved by its use, drawings forming its further part and a descriptive part which illustrates and describes a preferred embodiment of the invention should also be taken into account.

Sl. 1 je pogled v perspektivi na izboljšan sistem za preizkušanje generatorja po prednostni izvedbeni obliki izuma,FIG. 1 is a perspective view of an improved generator testing system according to a preferred embodiment of the invention,

Sl. 2 je delen shematski pogled, ki upodablja nameščanje inšpekcijskega vozička po izumu,FIG. 2 is a partial schematic view showing the installation of an inspection trolley according to the invention,

Sl. 3 je shematski pogled v tlorisu, ki ponazarja voziček, ki je prikazan v sl. 2,FIG. 3 is a schematic plan view of the trolley illustrated in FIG. 2,

Sl. 4 je shematski diagram, ki ponazarja krmilni sistem za voziček, ponazorjen v sl. 1 - 3,FIG. 4 is a schematic diagram illustrating a trolley control system illustrated in FIG. 1 - 3,

Sl. 5 je shematska ponazoritev električnega tipala na vozičku, ponazorjenem v sl. 1 - 4 v skladu s prvo izvedbo,FIG. 5 is a schematic illustration of the electrical sensor on the trolley illustrated in FIG. 1 - 4 according to the first embodiment,

SL 6 je shematska ponazoritev električnega tipala v skladu z drugo izvedbo, in SL 7 je shematska ponazoritev vozička kabla v sistemu, ki je ponazorjen v sl. 1.SL 6 is a schematic illustration of an electrical sensor according to another embodiment, and SL 7 is a schematic illustration of a cable trolley in the system illustrated in FIG. 1.

Glede na risbe, v katerih enake referenčne številke prek pogledov označujejo ustrezno konstrukcijo in posebno glede na slike 1 - 3, je sistem 10 za preizkušanje električnega generatorja po prednostni izvedbi izuma prikazan postavljen poleg električnega generatorja tipa, ki obsega stator 12 in rotor 14. Kot je tipično pri takšnih generatorjih, ima stator 12 notranji obod, v katerem so v železu 16 statorja določene radialne reže. V vsaki od rež, ki so določene v železu 16 statorja, je nameščena tuljava 18 statoija. Tuljavo 18 statorja zadržuje v takšnih režah nemagnetni statorski klin 20, kot je najbolje razvidno v sl. 2.According to the drawings, in which the same reference numbers indicate the corresponding construction through the views, and in particular with reference to Figures 1 - 3, the system 10 for testing the electric generator according to a preferred embodiment of the invention is shown placed next to an electric generator of the type comprising stator 12 and rotor 14. is typical of such generators, the stator 12 has an inner circumference in which radial slots are defined in the iron 16 of the stator. In each of the slots defined in the iron 16 of the stator, a coil of 18 statues is installed. The stator coil 18 is retained in such slots by a non-magnetic stator wedge 20, as best seen in FIG. 2.

Ob ponovnem sklicevanju na sl. 2 obsega sistem 10 za preizkušanje voziček 22, katerega velikost omogoča vstop v zračno režo, ki nastopa med statorjem 12 in rotorjem 14. Kot se vidi iz. sl. 2 in 3, ima voziček 22 na sebi pritrjenih več električnih tipal za zaznavanje, ali je voziček 22 glede na režo statorja, v kateri se nahaja tuljava 18 statorja, optimalno središčen. Podrobneje obsegajo ta tipala levo zadnje tipalo 24, ki je nastavljivo nameščeno znotraj reže 34, desno zadnje električno tipalo 26, ki je podobno nastavljivo nameščeno znotraj reže 36, prednje levo tipalo 28, ki je nastavljivo nameščeno znotraj reže 38 in prednje desno električno tipalo 30, ki je nastavljivo nameščeno znotraj reže 40. Izvedene so reže 34, 36, 38 in 40 za nastavljanje, da bi se omogočilo vozičku 22, da bo uporabljen pri pregledu generatorjev, ki imajo različne širine rež.Referring again to FIG. 2 comprises a trolley system 10 for testing 22, the size of which allows entry into the air gap between the stator 12 and the rotor 14. As can be seen from. FIG. 2 and 3, the cart 22 has several electrical sensors attached to it to detect whether the cart 22 is optimally centered relative to the stator slot in which the stator coil 18 is located. More specifically, these sensors comprise a left rear sensor 24 adjustably positioned within slot 34, a right rear electrical sensor 26 similarly adjustable inside slot 36, a front left sensor 28 adjustably mounted within slot 38, and a front right electric sensor 30 , which is adjustably positioned within slot 40. Adjustment slots 34, 36, 38 and 40 are implemented to allow cart 22 to be used to inspect generators having different slot widths.

Ob sklicevanju na sl. 2 in 3 se vidi, da je voziček daljinsko upravljan prek krmilnega kabla 32, ki je priključen na voziček 22 prek električnega signalnega priključka 42. Voziček 22 ima nadalje več na njem pritrjenih magnetov 44. Magneti 44 so dovolj razmaknjeni, tako da se lahko namestijo ob železo 16 statorja na obeh straneh tuljave 18, kot je prikazano v sl. 2. Kot rezultat tega zagotavljajo magneti 44 vozičku 22 položaj ob tuljavi 18 statorja, tako da so kolesa 52, 58, 60, 62, 64 in 68 pritegnjena v stik s površino ustreznega dela 16 železa statorja.Referring to FIG. 2 and 3, the trolley can be seen to be remotely controlled via a control cable 32 connected to the trolley 22 via an electrical signal connector 42. The trolley 22 is further provided with more magnets 44 attached thereto. The magnets 44 are sufficiently spaced so that they can be positioned having the stator iron 16 on either side of the coil 18, as shown in FIG. 2. As a result, the magnets 44 provide cart 22 with a position on the stator coil 18 so that the wheels 52, 58, 60, 62, 64 and 68 are engaged in contact with the surface of the corresponding stator iron portion 16.

Za izvajanje vizualnih inšpekcij tako na statorju 12 generatorja in na telesu rotorja generatorja je na vozičku 22 prav tako nameščena barvna CCD kamera 46. Barvna CCD kamera 46 prav tako pomaga pri nameščanju vozička 22 na zaželen položaj, kar je izjemno pomembno, če se izvaja preizkušanje tesnosti statorskih klinov 20. Na prednjem koncu vozička 22 je nameščen par luči 48, da bi se barvni CCD kameri 46 omogočilo potrebno osvetlitev.To perform visual inspections on both the stator 12 of the generator and the body of the generator rotor, a colored CCD camera 46 is also mounted on the trolley 22. A colored CCD camera 46 also helps to position the trolley 22 in the desired position, which is extremely important when testing is performed stator wedges tightness 20. A pair of lights 48 are mounted at the front end of trolley 22 to allow the color CCD camera 46 to provide the necessary illumination.

Voziček 22 obsega nadalje prvi pogonski nmotor 50, ki je s pogonskim vlečnim elementom 51 namenjen poganjanju treh desnih stranskih koles 52, 58 in 60. Podobno poganja prek pogonskega vlečnega elementa 67 drugi pogonski motor 66 tri leva stranska kolesa 68, 62, 64. Pogonska vlečna elementa 51, 67 sta izvedena tako, da se vsaka skupina pogonskih koles 52, 58, 60 ali 62, 64, 68 vrti z enako kotno hitrostjo.The trolley 22 further comprises a first drive nmotor 50 which is actuated by the drive traction element 51 to drive the three right side wheels 52, 58 and 60. Similarly, the second drive motor 66 through the drive traction unit 67 drives the three left side wheels 68, 62, 64. the traction members 51, 67 are arranged such that each group of drive wheels 52, 58, 60 or 62, 64, 68 rotates at the same angular speed.

Glavni cilj električnih tipal 24, 26, 28, 30 je detektiranje razlik električne prevodnosti med železom 16 statorja generatorja in neprevodnimi, nemagnetnimi klini 20 statorja. Tam nastopa velika razlika v električni prevodnosti med železom 16 statorja, kije običajno izdelano iz električne vrste jekla, in klinov 20 statorja, ki so izdelani iz vlaknatega stekla. Obstajata dva tipa električnih tipal, ki sta primerna za detektiranje razlik v električni prevodnosti. Na kratko je v sl. 5 prikazana prva izvedba izuma, kjer so tipala 24, 26, 28, 30 izvedena kot kapacitvne tipalne enote 86. Vsaka kapacitivna tipalna enota 86 obsega kapacitivno tipalo 88, ki je nameščeno nad podložnim materialom 90. Druga izvedba izuma, prikazana v sl. 6, alternativno uporablja induktivna tipala 92, od katerih vsako obsega induktivno tuljavo 94, ki ustvarja nad podložnim materialom 98 magnetno polje 96.The main objective of the electrical sensors 24, 26, 28, 30 is to detect differences in electrical conductivity between the iron 16 of the generator stator and the non-conducting, non-magnetic wedges 20 of the stator. There is a big difference in electrical conductivity between the iron 16 of the stator, usually made of electrical steel, and the 20 stator wedges, which are made of fiberglass. There are two types of electrical sensors that are suitable for detecting differences in electrical conductivity. Briefly, in FIG. 5 shows a first embodiment of the invention, wherein the sensors 24, 26, 28, 30 are designed as capacitive touch units 86. Each capacitive touch unit 86 comprises a capacitive sensor 88 mounted above the washer 90. The second embodiment of the invention shown in FIG. 6, alternatively uses inductive sensors 92, each comprising an inductive coil 94 which generates a magnetic field 96 above the washer material 98.

Kot je sedaj razvidno iz sl. 4, sta dve prednji električni tipali 28, 30 priključeni na diferencialni ojačevalnik 72 in dve zadnji električni tipali 24, 26 sta podobno priključeni na drugi diferencialni ojačevalnik 74. Diferencialna ojačevalnika 72, 74 sta v povezavi z analogno-digitalnim modulom 76, ki je v dvosmerni povezavi z računalnikom 84. Računalnik 84 je tudi v dvosmerni povezavi z modulom 82 za krmiljenje gibanja. Modul 82 za krmiljenje gibanja sprejema vhodne signale z levega oz. desnega kodirnika 54 oz. 56 levega oz. desnega pogonskega motorja. Modul 82 za krmiljenje gibanja daje nadalje signalne napotke, kateri so ojačeni z ojačevalnikoma 78, 80, desnemu oz. levemu pogonskemu motorju 50 oz. 66.As can now be seen from FIG. 4, the two front electrical sensors 28, 30 are connected to a differential amplifier 72 and the two rear electrical sensors 24, 26 are similarly connected to the second differential amplifier 74. The differential amplifiers 72, 74 are coupled to an analog-to-digital module 76 which is in two-way connection to the computer 84. The computer 84 also has a two-way connection to the motion control module 82. The motion control module 82 receives the input signals from the left or left. right encoder 54 oz. 56 left, respectively. of the right propulsion engine. The motion control module 82 further provides signaling directions which are amplified by amplifiers 78, 80, right or left. left-hand drive motor 50 oz. 66.

Pri delovanju se namesti voziček 22 v zračno režo med rotorjem 14 in statorjem 12 tako, da so električna tipala 24, 26, 28, 30 na začetku naravnana tako, da se ena polovica vsakega tipala nahaja nad železom 16 statorja generatorja in druga polovica tipala nad klinom 20 statorja. Če se voziček 22 premika od središča reže statorja, potem se bo prevodnost materiala, ki se nahaja neposredno pod ustreznimi tipali 22, 24, 26, 28, spreminjala. Signala od desnega prednjega električnega tipala 30 in levega prednjega električnega tipala 28 se dovajata diferencialnemu ojačevalniku 72, ki primerja oba signala in oddaja razliko med njima. Izhod diferencialnega ojačevalnika 72 se pošilja analogno-digitalnemu modulu 76 in od tam računalniku 84. Podobno se signala z levega in desnega zadnjega električnega tipala 24, 26 pošiljata diferencialnemu ojačevalniku 74, ki primerja dva signala in oddaja razliko med njima analogno-digitalnemu modulu 76. Ta informacija se daje tudi računalniku 84. Računalnik 84 uporablja informacijo iz diferencialnega ojačevalnika 72 za ugotovitev, ali se nahaja zadnji del vozička 22 levo ali desno od središča reže statorja.In operation, the trolley 22 is positioned in the air gap between the rotor 14 and the stator 12 so that the electrical sensors 24, 26, 28, 30 are initially oriented so that one half of each sensor is located above the iron 16 of the generator stator and the other half of the sensor above wedge of 20 stator. If cart 22 moves away from the center of the stator slot, then the conductivity of the material directly below the corresponding sensors 22, 24, 26, 28 will vary. The signals from the right front electrical sensor 30 and the left front electrical sensor 28 are fed to the differential amplifier 72, which compares the two signals and outputs the difference between them. The output of the differential amplifier 72 is sent to the analog-digital module 76 and from there to the computer 84. Similarly, signals from the left and right rear electrical sensors 24, 26 are sent to the differential amplifier 74, which compares the two signals and transmits the difference between them to the analog-digital module 76. This information is also given to the computer 84. The computer 84 uses information from the differential amplifier 72 to determine whether the back of the trolley 22 is located to the left or right of the center of the stator slot.

Če se nahajata ali prednji ali zadnji del vozička 22 desno ali levo od središča reže statorja, oddaja računalnik 84 signal modulu 82 za krmiljenje gibanja za kompenzacijo nenatančne namestitve. Modul 82 za krmiljenje gibanja ugotavlja, kako hitro se premikata pogonska motorja 50, 66, ker sprejema takšno informacijo od ustreznih kodirnikov 56, 54. Modul 82 za krmiljenje gibanja krmili tudi gibanje levega oz. desnega pogonskega motorja 66 oz. 50 z oddajanjem signalov, ki jih ojačujeta ustrezna ojačevalnika 80 oz. 78. Z uporabo te zanke krmilne povratne zveze lahko računalnik 84 s spreminjanjem hitrosti vsakega pogonskega motorja 50, 66 naravna vsako, od električnih tipal 24, 26, 28, 30 ugotovljeno napačno nastavitev.If either the front or rear of trolley 22 is located to the right or left of the center of the stator slot, the computer 84 outputs a signal to the motion control module 82 to compensate for inaccurate placement. The motion control module 82 determines how fast the motors 50, 66 move, because it receives such information from the corresponding encoders 56, 54. The motion control module 82 also controls the movement of the left or left. right-hand drive engine 66 oz. 50 by transmitting signals amplified by the respective amplifiers 80 or. 78. Using this control feedback loop, the computer 84 can adjust any of the electrical sensors 24, 26, 28, 30 by varying the speed of each drive motor 50, 66, to determine any of the incorrect settings.

Glede na sl. 7 se vidi, da obsega sistem 10 voziček 100 za kabel za izoliranje vozička 22 pred katerimikoli silami, ki bi se lahko mogoče prek kabla 32 prenašale na voziček 22. Takšne sile vključujejo težo kateregakoli obešenega dela kabla 32, ki bi mogoče imela lahko učinek napačne nastavitve vozička 22. Kot se lahko v sl. 7 vidi, obsega voziček 100 kabla okvir 102, na katerem je pritrjenih več koles 104. Okvir 104 obsega vsaj en magnet 108, ki pritegne okvir 102 proti železu 16 statorja tako, da so kolesa 104 v stiku z železom 16 statorja. Kot je prikazano v sl. 1, naseda voziček 100 prednostno na istem delu železa 16 statorja, kot voziček 22. Kot se lahko vidi v sl. 7, je okvir 102 konstruiran za to, da podpira kabel 32. Voziček 100 kabla nima neodvisnega pogonskega mehanizma, temveč se preprosto vleče za vozičkom 22.According to FIG. 7 shows that system 10 comprises trolley 100 for insulating trolley cable 22 from any forces that could be transmitted to trolley via cable 32. Such forces include the weight of any suspended portion of cable 32 that may have the effect of misalignment. trolley settings 22. As can be seen in FIG. 7, the cable cart 100 comprises a frame 102 with several wheels 104. The frame 104 comprises at least one magnet 108 which secures the frame 102 to the stator iron 16 such that the wheels 104 are in contact with the stator iron 16. As shown in FIG. 1, the trolley 100 is preferably seated on the same part of the stator iron 16 as the trolley 22. As can be seen in FIG. 7, frame 102 is designed to support cable 32. Cable trolley 100 does not have an independent drive mechanism but is simply pulled behind trolley 22.

Claims

PATENT APPLICATIONS

1. A test system 10 for conducting an electrical generator of a type having a rotor 14 and a stator 12, wherein the stator 12 has an inner circumference defining the space within which the rotor 14 is attached by rotation and comprising an inner circumference of magnetic material in which several axial stator slots are defined, characterized in that the system comprises a movable trolley (22), the size of which allows passage between the rotor (14) and the stator (12) and can be positioned above the selected stator slot (12) so that to axially cross the selected stator slot (12), wherein said trolley (22) is adapted to have test equipment attached to it, the sensing means (24, 26, 28, 30) to detect if the trolley is movable ( 22) centered in the optimum position relative to the selected stator slot, and centering means for centering the movable trolley (22) relative to the optimum position if the sensing means (24, 26, 28, 30) indicate that the movable trolley (22) is not so centered that the accuracy of each test with optimized testing equipment is optimized.

System according to claim 1, characterized in that it comprises a movable trolley (22) having at least one magnet mounted above the magnetic material in the stator (12) adjacent to the selected slot for fixing the trolley (22) above the selected slot independent of gravity sil.

System according to claim 1, characterized in that the sensing means (24, 26, 28, 30) are designed and positioned to detect the position of the movable trolley (22) with respect to the magnetic material on at least one side of said selected slots.

System according to claim 3, characterized in that the sensing means (24, 26. 28, 30) comprise a first sensor (28) which is designed and positioned to detect the position of the movable trolley (22) with respect to the magnetic material on one side. selected slots, and a second sensor (30) designed and positioned to detect the position of the moving trolley (22) relative to the magnetic material on the other opposite side of the selected slit.

System according to claim 1, characterized in that said sensing means (24, 26, 28, 30) comprise an inductive sensor (92).

System according to claim 1, characterized in that said sensing means (24, 26, 28.30) comprise a capacitive sensor (86).

System according to claim 1, characterized in that said centering means comprises means for controlling at least one drive wheel on said cart (22) for centering said cart (22).

System according to claim 7, characterized in that said steering means comprises a first motor for controlling the left lateral drive wheel on said cart (22), and a second motor for controlling the right lateral drive wheel on the purchased cart (22).

9. A method for performing tests on an electric generator of the type having a rotor 14 and a stator 12, wherein the stator 12 has an inner circumference defining the space within which the rotor 14 is secured for rotation and comprises an inner circumference of magnetic material in which certain axial stator slots, characterized in that it comprises the phases:

(a) positioning the movable trolley (22) above the selected stator slot (12) so that it is able to axially cross the selected stator slot (12), the trolley (22) having test equipment attached to it;

(b) conducting testing with testing equipment;

(c) detecting if the movable trolley (22) is centered in the optimal position relative to the selected stator slot (12); and (d) centering the movable trolley (22) with respect to the optimum position, if the movable trolley (22) is not so centered, the accuracy of any testing with the testing equipment being optimized.

A method according to claim 9, characterized in that phase (a) comprises the use of at least one magnet to secure the trolley (22) above the selected slot independent of gravitational forces.

Method according to claim 9, characterized in that phase (b) comprises detecting the bogie slip (22) with respect to the magnetic material on at least one side of said selected slot.

Method according to claim 11, characterized in that phase (a) further comprises the use of a first sensor (28) designed and positioned to detect the position of the movable trolley (22) with respect to the magnetic material on one side of the selected slot, and the other sensor (30) which is designed and positioned to detect the position of the movable trolley (22) relative to the magnetic material on the other opposite side of the selected slot.

A method according to claim 9, characterized in that step (d) comprises the use of a first motor for controlling the left lateral drive wheel on said cart (22), and a second engine for controlling the right lateral drive wheel in said cart (22).