Abahlinzeki be-Oilfield frequency converter abahlinzeki bakukhumbuza ukuthi amamotho kagesi njengamanje angamathuluzi ajikelezayo asetshenziswa kakhulu. Ngokuthuthuka kanye nokuthandwa kwabaguquli befrikhwensi, amamotho kagesi aya ngokwanda adinga ukusetshenziswa kanye neziguquli zemvamisa. Kodwa-ke, ohlelweni lokusebenzisa ama-frequency converters nama-motor kagesi ndawonye, akunakugwenywa ukuhlangana nezinkinga eziningi:
1. Ingabe iziqalisi ezithambile zezimoto zingawonga amandla?
Umthelela wokonga amandla wesiqalo esithambile unomkhawulo, kodwa unganciphisa umthelela wokuqalisa kugridi yamandla, uzuze ukuqalisa okushelelayo, nokuvikela ukuvunguza kwemoto.
Ngokombono wokongiwa kwamandla, ngenxa yokwengezwa kwezifunda zokulawula eziyinkimbinkimbi, isiqalo esithambile asigcini nje ngokusindisa amandla, kodwa futhi kwandisa ukusetshenziswa kwamandla. Kodwa-ke, kunganciphisa ukuqala kwesifunda futhi kudlale indima yokuvikela.
Iyini i-torque yokuqala kanye ne-torque yokuqala ye-motor lapho usebenzisa isiguquli semvamisa ukusebenza?
Kusetshenziswa isiguquli sefrikhwensi ukuze sisebenze, imvamisa ne-voltage ziyanda ngokuhambisana nokusheshisa kwenjini, kanti isiqalo samanje sinqunyelwe ngaphansi kuka-150% wamanje olinganisiwe (125% ~ 200% kuye ngemodeli). Uma uqala ngokuqondile ngokunikezwa kwamandla kagesi, ukuqala kwamanje kuyizikhathi ezingu-6-7, okuholela ekushaqekeni kwemishini nogesi. Ukusebenzisa idrayivu yokuguqula imvamisa kungaqala kahle (ngesikhathi sokuqalisa eside). Ukuqala kwamanje izikhathi ezingu-1.2 ~ 1.5 zamanje ezilinganiselwe, futhi i-torque yokuqala i-70% ~ 120% ye-torque elinganiselwe; Kuziguquli zefrikhwensi ezinomsebenzi wokuthuthukisa ithoshi othomathikhi, itorque yokuqala ingaphezulu kuka-100% futhi ingaqala ngomthwalo ogcwele.
Ingabe kukhona ukuxhumana phakathi kokugcwala kwemoto nokujikeleza okufushane?
Kunezinhlobo ezimbili ze-motor overload; okukodwa Kuwukulayisha ngokweqile komshini: kuwukugcwala ngokweqile okubangelwa umthwalo wokushayela oweqa inani elilinganiselwe noma isistimu yokudlulisela ihlangabezana ne-jamming, engahlanganise lutho nesekhethi emfushane,. 2. Umthwalo ojwayelekile: Uma i-motor current igcwele kakhulu, kungenzeka ukuthi kungenxa yokumisa phansi kwendawo noma amasekhethi amafushane phakathi kwamajika e-motor winding.
Kuyini ukusetshenziswa kokulawulwa kwesivinini esishintshashintshayo? Yiziphi izinzuzo?
Kuyini ukusetshenziswa kokulawulwa kwesivinini esishintshashintshayo?
Ingasetshenziswa emishinini ejikelezayo enezidingo zokulawula isivinini.
Yiziphi izinzuzo zokulawulwa kwesivinini esishintshashintshayo?
Ngaphambi kokuqaliswa kokulawulwa kwesivinini esishintshashintshayo (ngokwethiyori, kwase kufeziwe kakade, kodwa ukuqaliswa kwangempela kwakungemva kokusungulwa kwemishini kagesi yamandla), umthethonqubo wejubane wendabuko wasebenzisa amandla amanje aqondile. Okubi kokulawulwa kwesivinini samanje okuqondile yizi:
① Ama-DC motors anezakhiwo eziyinkimbinkimbi kanye nezindleko zokulungisa eziphezulu
② Ngenxa yobukhona be-commutator, asikho isikhala esikhulu sokwanda kwamandla emoto ye-DC.
Ngakho-ke, izinzuzo zokulawulwa kwesivinini esishintshashintshayo yizi:
① Ingakwazi ukufeza ukusebenza okuhle kakhulu kokulawula isivinini njengokulawulwa kwejubane kwe-DC kumamotho e-AC.
② Ukugcinwa kwe-squirrel cage asynchronous motors kulula futhi kulula.
③ Akukho umkhawulo emandleni amamotho e-AC ngenxa yomgibeli.
Ungakukala kanjani ukumelana ne-insulation motor?
Uma kuyinjini ye-AC enezigaba ezintathu, kala ukumelana nokufakwa phakathi kwezigaba kanye nomhlabathi wamawindi ezigaba ezintathu zenjini.
Uma kuyinjini ye-DC, linganisa i-armature ye-motor ejikayo iye phansi, uchungechunge lwe-excitation oluya phansi, i-excitation yesibili ijika ibe phansi, kanye nochungechunge lwe-excitation emazombezombe ukuya kumajika e-excitation yesibili. Khetha i-shaker ehambisanayo ngokwezinga le-voltage yemoto ehloliwe.
Izinyathelo zokulinganisa:
---Nqamula ugesi
---Ukukhipha phansi
---Uma kuyinjini ye-AC enezigaba ezintathu, vula indawo emaphakathi (uma kungenzeka)
---Uma kuyinjini ye-DC, phakamisa ibhulashi.
---Sebenzisa itafula elinyakazayo ukukala ukumelana nokufakwa phakathi kwezigaba kanye nokuphansi ngokuhlukana
---Ukukhipha phansi
---Buyisela umugqa
---Rekhoda ukumelana nokushisa nokushisa kwe-ambient.
6. Iyini i-brushless ne-acyclic starter?
I-Brushless ne-Ringless Starter iyithuluzi eliqalayo elinqoba ububi bamamotho esilonda asynchronous afakwe izindandatho zokushelela, amabhulashi ekhabhoni, kanye namadivayisi okuqalisa ayinkimbinkimbi, kuyilapho egcina izinzuzo ze-torque yokuqala ephansi kanye nephezulu yokuqala yamamotho amanxeba. I-JR, JZR, YR, kanye ne-YZR yesigaba sesithathu sesilonda esinama-AC motors asynchronous (ngaphandle kwejubane eliguquguqukayo nalawo afakwe amakhamera okufaka) ayesebenzisa iziqalisi zokumelana, ama-reactors, ama-resistors abucayi azwela ama-frequency, iziqalisi ze-liquid variable resistor, neziqalisi ezithambile zingashintshwa ngokuthi "ama-brushless and open-loop starters".
Zingaki izindlela zokuqalisa ama-capacitor ezikhona zamamotho?
Kunezinhlobo ezimbili zokuqala:
⑴ Ukuqala kwe-Capacitor (ibhekisela ekunqanyulweni kwe-capacitor ngemva kokuba injini iqalisiwe);
⑵ I-capacitor iqala futhi isebenze (i-capacitor ibamba iqhaza ekusebenzeni ngemva kokuqala).
Ingabe i-transformer ingasetshenziswa njengomthwalo we-converter frequency?
Eqinisweni, kufanele kwenzeke, kodwa akusebenzi ekusebenzeni. Ama-frequency converter awadingi ama-transformer ukuze akhulise i-voltage, futhi kufanele kube nezinhlobonhlobo ezingasetshenziselwa amasekhethi angaphezu kuka-380V. Uma kudingeka i-voltage ephezulu, kukhona namasekhethi angaguqulelwa ngokuqondile abe ngu-220V noma ku-380V abese ephinda kabili amandla kagesi ukuze kutholwe amandla kagesi aphezulu. Iziguquli zefrikhwensi zisetshenziswa kakhulu ekushayeleni umthwalo (njengamamotho kagesi) futhi awavamile ukusetshenziselwa ukuguqula imvamisa yamandla. Imisebenzi yeziguquli zefrikhwensi ikude kakhulu nokukhawulelwa ekuguquleni imvamisa ngokwayo, futhi kunemisebenzi eminingi eyengeziwe njengokuvikela okuhlukahlukene. Uma iziguquli zefrikhwensi zisetshenziselwa ukuthola amandla okuguqula imvamisa, akunconywa ngokombono wezomnotho. Kunconywa ukusebenzisa amanye amasekhethi okuguqula imvamisa.
Ingabe isiguquli sefrikhwensi singalungiswa sibe ngu-1Hz, futhi zingaki ama-Hz esingalungiswa ukuze sisetshenziswe?
Uma isiguquli semvamisa sisetshenziswa kumotho ejwayelekile ye-AC asynchronous, lapho isiguquli semvamisa silungiswa sibe ngu-1Hz, sesivele siseduze ne-DC, okungavunyelwe nhlobo. I-motor izosebenza ngesikhathi esiphezulu ngaphakathi komkhawulo we-converter frequency, futhi injini izokhiqiza ukushisa okukhulu, okungenzeka kushise injini.
Uma ukusebenza kudlula i-50Hz, kuzonyusa ukulahleka kwensimbi kwenjini, okuphinde kube yingozi enjinini. Ngokuvamile, kungcono ukuthi ungadluli ku-60Hz (ukweqa isikhathi esifushane kuvunyelwe), ngaphandle kwalokho kuzophinde kuthinte impilo yesevisi yemoto.
Uyini umgomo wokusebenza we-frequency regulation resistor kusiguquli sefrikhwensi? Kungani ukulungisa ukumelana kungashintsha imvamisa?
Ukumelana nokulungiswa kwefrikhwensi yesiguquli sefrikhwensi isetshenziselwa ukuhlukanisa ngokulinganayo i-voltage eyireferensi engu-10V yesiguquli sefrikhwensi, bese siyibuyisela ebhodini lokulawula eliyinhloko lesiguquli sefrikhwensi. Ibhodi eliyinhloko lokulawula lesiguquli sefrikhwensi libe sesenza ukuguqulwa kwe-analog-to-digital ku-voltage ebuyiselwe yi-resistor ukuze ifunde idatha, bese iyiguqulela inani elilinganiselwe lemvamisa elinganiselwe ukuze kukhishwe imvamisa yamanje. Ngakho-ke, ukulungisa inani le-resistor kungalungisa imvamisa yesiguquli semvamisa.
11. Ingabe isiguquli se-frequency singakwazi ukuhlukanisa amandla wamanje we-motor?
Ingabe ukuguqulwa kwemvamisa kungehliswa? Angikwazi! Kodwa inqobo nje uma i-frequency ephumayo f kanye nesivinini esivumelanayo n1 sigcina izinga lokushelela ebangeni elizinzile noma izinga lokushelela elilinganiselwe Se, lilingana nokuhlukanisa amandla wamanje we-motor, ngoba isici samandla we-rotor manje sesi-1, futhi i-rotor yamanje yi-torque yamanje okudingeka wonke umuntu ayihlukanise futhi ayilawule! Isiguquli semvamisa siyidivayisi yokulawula isivinini samamotho asynchronous, futhi asikwazi ukwenza noma yikuphi ukulawula okudlula izici zemishini zamamotho asynchronous.
Kungani izinga eliphezulu lamanje liphezulu uma uqala i-induction motor? Ingabe okwamanje izokwehla ngemva kokuqaliswa?
Uma i-induction motor isesimweni sokuma, ngokombono we-electromagnetic, ifana ne-transformer. I-stator winding exhunywe ekunikezeni amandla ilingana nekhoyili eyinhloko ye-transformer, futhi i-rotor winding endaweni evaliwe ilingana nekhoyili yesibili ye-transformer emfushane; Alukho uxhumano lukagesi phakathi kwe-stator winding kanye ne-rotor winding, uxhumano lukazibuthe kuphela. I-flux kazibuthe idlula ku-stator, i-air gap, kanye ne-rotor core ukuze kwakheke isekethe evaliwe. Ngesikhathi sokuvala, i-rotor ayikaqali ukujikeleza ngenxa ye-inertia, futhi inkambu kazibuthe ejikelezayo inqamula i-rotor mazombezo ngesivinini esikhulu sokusika - isivinini esivumelanayo, okubangela ukuvunguza kwe-rotor ukuze kubangele amandla aphezulu kakhulu. Ngakho-ke, i-current enkulu igeleza ku-conductor ye-rotor, ekhiqiza amandla kazibuthe ukuze imelane ne-stator magnetic field, njengoba nje ukuguquguquka kazibuthe kwesibili kwe-transformer kudinga ukumelana nokuguquguquka kazibuthe okuyinhloko.
Ukuze kugcinwe i-flux yangempela kazibuthe ehambisana ne-voltage yokuhlinzeka amandla, i-stator ikwandisa ngokuzenzakalelayo okwamanje. Ngenxa yokuthi okwamanje i-rotor iphezulu kakhulu ngalesi sikhathi, i-stator yamanje iphinde ikhule kakhulu, ngisho nangaphezulu izikhathi ezingu-4-7 zamanje ezilinganiselwe, okuyisizathu sokuqala kwamanje.
Kungani i-current incane ngemva kokuqala: Njengoba isivinini se-motor sanda, isivinini lapho i-stator magnetic field inqamula khona umqhubi we-rotor iyancipha, amandla atholakala ku-rotor conductor ayancipha, futhi okwamanje ku-rotor conductor nawo ayancipha. Ngakho-ke, ingxenye ye-stator yamanje esetshenziselwa ukuvala i-flux magnetic eyenziwe yi-rotor current nayo iyancipha, ngakho-ke i-stator yamanje iyancipha kusukela enkulu kuye encane kuze kube yilapho ibuyela evamile.
Uyini umthelela wefrikhwensi yenkampani yenethiwekhi kuziguquli zefrikhwensi namamotho?
Ifrikhwensi yenkampani yenethiwekhi inomthelela kumphumela wamanje wesiguquli sefrikhwensi:
(1) Uma uphakeme imvamisa yokusebenza, uba mkhulu umjikelezo womsebenzi wamagagasi kagesi, uba mncane izingxenye ze-harmonic ezihleleka kakhulu zamanje, okungukuthi, ukuphakama kwefrikhwensi yenkampani yenethiwekhi, kanye nokushelela kwamagagasi amanje;
(2) Ukuphakama kwefrikhwensi yenkampani yenethiwekhi, kuncane okuvunyelwe kokuphumayo kwamanje kwesiguquli sefrikhwensi;
(3) Uma iphakeme imvamisa yenkampani yenethiwekhi, iba yincane i-capacitance impedance ye-wiring capacitor (ngoba i-Xc=1/2 π fC), futhi inkulu ukuvuza kwamanje okubangelwa ama-pulse ama-high-frequency.
Umthelela wefrikhwensi yenkampani yenethiwekhi kumamotho:
Ukuphakama kwefrikhwensi yenkampani yenethiwekhi, kuncane ukudlidliza kwenjini, kwehlisa umsindo wokusebenza, kanye nokushisa okuncane okukhiqizwa injini. Kodwa lapho imvamisa yenkampani yenethiwekhi iphakeme, imvamisa ye-harmonic yamanje iphezulu, umphumela wesikhumba we-motor stator unzima kakhulu, ukulahleka kwemoto kukhulu, namandla okukhiphayo aphansi.
Kungani i-frequency converter ingasetshenziswa njengesiguquli samandla samandla?
Isekethe yonke yokunikezwa kwamandla okuvama okuguquguqukayo iqukethe i-AC DC, i-AC, nezingxenye zokuhlunga, ngakho-ke amandla kagesi kanye namagagasi amanje ewakhiphayo amagagasi e-sine amsulwa, asondele kakhulu kugesi we-AC ofanele. Ingakwazi ukukhipha amandla kagesi wegridi kanye nemvamisa yanoma yiliphi izwe emhlabeni.
Futhi isiguquli sefrikhwensi sakhiwe ngamasekhethi afana ne-AC eqondile yamanje kanye ne-AC (igagasi eliguquliwe), futhi igama elijwayelekile lesiguquli semvamisa kufanele libe isilawuli sesivinini sokuguqula imvamisa. I-waveform ye-voltage yayo yokuphuma iyigagasi lesikwele le-pulse elinezingxenye eziningi ze-harmonic. I-voltage nefrikhwensi ishintsha ngokulinganayo ngesikhathi esifanayo futhi ayikwazi ukulungiswa ngokuhlukana, okungahlangabezani nezidingo zokunikezwa kwamandla e-AC. Empeleni, angeke isetshenziswe njengomthombo wamandla futhi ngokuvamile isetshenziselwa ukulawulwa kwesivinini sezigaba ezintathu zama-asynchronous motors.
Kungani izinga lokushisa lemoto liphakeme uma usebenzisa isiguquli sefrikhwensi kunasesilinganisweni samandla?
Ngenxa yokuthi i-waveform ephumayo yesiguquli se-frequency ayilona igagasi eline-sine, kodwa igagasi elihlanekezelwe, i-motor current ku-torque elinganiselwe icishe ibe ngu-10% ephakeme kunaleyo esebenza imvamisa yamandla, ngakho-ke ukunyuka kwezinga lokushisa kungaphezulu kancane kwalokho kumaza amandla.
Elinye iphuzu ukuthi lapho isivinini se-motor sincipha, isivinini se-fan yokupholisa imoto akwanele, futhi ukuphakama kwezinga lokushisa kwe-motor kuzoba phezulu.