Uma amamotho amabili afanayo esebenza ku-50HZ amandla imvamisa, eyodwa isebenzisa i-frequency converter kanti enye ayisebenzi, futhi isivinini kanye ne-torque kokubili kusesimweni esilinganisiwe semoto, ingabe isiguquli semvamisa singakwazi ukonga amandla? Kungakanani okungagcinwa?
Impendulo: Kulokhu, isiguquli sefrikhwensi singathuthukisa isici samandla kuphela futhi asikwazi ukonga ugesi.
1. Ukuguqulwa kwemvamisa akukwazi ukonga ugesi yonke indawo, futhi kunezikhathi eziningi lapho ukuguqulwa kwefrikhwensi kungase kungawongi ngempela ugesi.
2. Njengesekhethi ye-elekthronikhi, isiguquli semvamisa ngokwaso sisebenzisa amandla (cishe u-2-5% wamandla alinganiselwe)
3. Kuyiqiniso ukuthi iziguquli zefrikhwensi zisebenza ngefrikhwensi yamandla futhi zinemisebenzi yokonga amandla. Kodwa imfuneko yakhe yile:
Okokuqala, idivayisi ngokwayo inomsebenzi wokonga amandla (usekelo lwesofthiwe), oluhambisana nezidingo zalo lonke uhlelo noma inqubo;
Okwesibili, ukusebenza okuqhubekayo kwesikhathi eside.
Ngaphandle kwalokho, akunandaba ukuthi iyawonga ugesi noma cha, ayisho lutho. Uma kuthiwa isiguquli sefrikhwensi sisebenza ukonga amandla ngaphandle kwanoma yimiphi imibandela, kuyihaba noma ukuqagela kwezentengiso. Ukwazi yonke indaba, uzosebenzisa yena ngobuhlakani ukuze akukhonze. Qiniseka ukuthi unaka isimo sokusetshenziswa nemibandela ukuze ukusebenzise ngendlela efanele, ngaphandle kwalokho kuyoba ukulandela ngokungaboni, ukukholelwa kalula, nokukhohliswa.
Sivamise ukuba nemibono eyiphutha elandelayo lapho sisebenzisa iziguquli zemvamisa:
Umbono oyiphutha 1: Ukusebenzisa isiguquli sefrikhwensi kungonga ugesi
Ezinye izincwadi zithi iziguquli zemvamisa ziyimikhiqizo yokulawula ukonga amandla, okunikeza umbono wokuthi ukusebenzisa iziguquli zefrikhwensi kungonga ugesi.
Eqinisweni, isizathu sokuthi kungani abaguquli befrikhwensi bengonga ugesi kungenxa yokuthi bangakwazi ukulawula isivinini samamotho kagesi. Uma iziguquli zefrikhwensi ziyimikhiqizo yokulawula ukonga amandla, konke okokusebenza kokulawula isivinini kungabuye kubhekwe njengemikhiqizo yokulawula ukonga amandla. Isiguquli sefrikhwensi sisebenza kahle kakhudlwana futhi siyisici samandla kunamanye amadivaysi okulawula isivinini.
Ukuthi isiguquli sefrikhwensi singafinyelela ukonga amandla kunqunywa izici zokulawula isivinini somthwalo waso. Emithwalweni efana namafeni we-centrifugal namaphampu amaphakathi, i-torque ilingana nesikwele sejubane, futhi amandla alingana nekhyubhu yejubane. Uma nje ukugeleza kokulawula kwe-valve yasekuqaleni kusetshenziswa futhi kungasebenzi ngokugcwala okuphelele, ukushintshela ekusebenzeni kokulawula isivinini kungafinyelela ukonga amandla. Uma isivinini sehla sifika ku-80% wesokuqala, amandla angama-51.2% kuphela wawasekuqaleni. Kungabonakala ukuthi ukusetshenziswa kweziguquli zemvamisa emithwalweni enjalo kunomphumela obaluleke kakhulu wokonga amandla. Emithwalweni efana nama-Roots blowers, i-torque ayifani nesivinini, okungukuthi i-torque engaguquki. Uma indlela yasekuqaleni yokusebenzisa i-valve yokukhipha umoya ukuze kudedelwe ivolumu yomoya eyeqile ukuze kulungiswe umthamo womoya ishintshelwa ekusebenzeni kokulawula isivinini, ingazuza futhi ukonga amandla. Lapho isivinini sehla siye ku-80% yenani laso loqobo, amandla afinyelela ku-80% yenani lawo langempela. Umthelela wokonga amandla mncane kakhulu kunalowo wezinhlelo zokusebenza kumafeni we-centrifugal namaphampu amaphakathi. Ukuze kulayishwe amandla njalo, amandla azimele ngesivinini. Umthwalo wamandla oqhubekayo esitshalweni sikasimende, njengesikali sebhande le-batching, kunciphisa isivinini sebhande lapho ungqimba lwezinto ezibonakalayo bukhulu ngaphansi kwezimo ezithile zokugeleza; Lapho ungqimba lwezinto ezibonakalayo luncane, ijubane lebhande liyakhula. Ukusetshenziswa kweziguquli zefrikhwensi kumthwalo onjalo akukwazi ukonga ugesi.
Uma kuqhathaniswa nezinhlelo zokulawula isivinini ze-DC, ama-motor e-DC asebenza kahle kakhulu kanye nesici samandla kunamamotho e-AC. Ukusebenza kahle kwezilawuli zejubane ze-DC zedijithali kuqathaniswa nalokho kweziguquli zefrikhwensi, futhi kuphakeme kakhulu kunalokhu kweziguquli zemvamisa. Ngakho-ke, akulungile ukusho ukuthi ukusebenzisa ama-asynchronous motors kanye neziguquli zefrikhwensi konga ugesi omningi kunokusebenzisa amamotho e-DC kanye nezilawuli ze-DC, ngokombono nangokungokoqobo.
Umbono oyiphutha 2: Ukukhethwa kwamandla kwesiguquli semvamisa kususelwa kumandla alinganisiwe emoto
Uma kuqhathaniswa namamotho kagesi, intengo yeziguquli zefrikhwensi ibiza kakhulu, ngakho-ke kunengqondo kakhulu ukunciphisa umthamo weziguquli zemvamisa ngenkathi kuqinisekiswa ukusebenza okuphephile nokuthembekile.
Amandla okuguqula imvamisa asho amandla emoto eyi-4-pole AC asynchronous ewafanele.
Ngenxa yenani elihlukile lezigxobo zamamotho anomthamo ofanayo, isilinganiso samanje semoto siyahlukahluka. Njengoba inani lezigxobo enjinini landa, umthamo olinganisiwe wemoto nawo uyanda. Ukukhethwa kwamandla kwesiguquli sefrikhwensi akukwazi ukususelwa kumandla alinganisiwe enjini. Ngesikhathi esifanayo, kumaphrojekthi okuvuselela angazange asebenzise iziguquli zemvamisa ekuqaleni, ukukhethwa kwamandla okuguquguquka kwemvamisa akukwazi ukusekelwe kumanje olinganisiwe wemoto. Lokhu kungenxa yokuthi ukukhethwa kwamandla enjini kagesi kufanele kucabangele izinto ezinjengomthwalo omkhulu, i-surplus coefficient, kanye nokucaciswa kwemoto. Imvamisa, imali enqwabelene inkulu, futhi izinjini zezimboni zivame ukusebenza ku-50% kuya ku-60% womthwalo olinganiselwe. Uma umthamo we-frequency converter ekhethiwe ngokusekelwe kumanje olinganiselwe we-motor, kune-margin eningi kakhulu esele, okuholela ekulahlekeni kwezomnotho, futhi ukwethembeka akuthuthukisiwe ngenxa yalokho.
Ngama-motor cage squirrel, ukukhethwa kwamandla okuguqula imvamisa kufanele kusekelwe esimisweni sokuthi isilinganiso samanje sesiguquli semvamisa sikhulu noma silingana nezikhathi eziyi-1.1 zobukhulu obujwayelekile obusebenzayo benjini, obungakhuphula ukonga izindleko. Ezimweni ezinjengokuqala komthwalo osindayo, indawo yokushisa ephezulu, injini yesilonda, i-synchronous motor, njll., umthamo wesiguquli sefrikhwensi kufanele ukhuliswe ngokufanelekile.
Ngemiklamo esebenzisa ama-frequency converters kusukela ekuqaleni, kuyaqondakala ukukhetha umthamo wesiguquli semvamisa ngokusekelwe kumanje olinganiselwe we-motor. Lokhu kungenxa yokuthi umthamo wesiguquli sefrikhwensi awukwazi ukukhethwa ngokusekelwe ezimweni zangempela zokusebenza ngalesi sikhathi. Yiqiniso, ukuze kuncishiswe ukutshalwa kwezimali, kwezinye izimo, amandla okuguqula imvamisa angaba nokungaqiniseki kuqala, futhi ngemva kokuba okokusebenza sekusebenze isikhathi esithile, kungakhethwa ngokusekelwe kumanje wangempela.
Ohlelweni lwesibili lokugaya lwesigayo sikasimende esinobubanzi obungu-2.4m × 13m enkampanini ethile kasimende e-Inner Mongolia, kunesikhethi sempushana esikhiqizwa ekhaya esingu-N-1500 O-Sepa esisebenza kahle kakhulu, esifakwe imodeli kagesi engu-Y2-315M-4 enamandla angu-132kW. Nokho, i-FRN160-P9S-4E i-frequency converter ikhethiwe, elungele ama-motor angu-4-pole enamandla angu-160kW. Ngemva kokuqaliswa ukusebenza, imvamisa yokusebenza ephezulu ingu-48Hz, futhi yamanje ingu-180A kuphela, engaphansi kuka-70% wamanje olinganiselwe wenjini. Injini ngokwayo inamandla amakhulu engeziwe. Futhi ukucaciswa kwe-frequency converter yizinga elilodwa elikhulu kunaleyo yemoto yokushayela, okubangela ukungcola okungadingekile futhi akuthuthukisi ukwethembeka.
Uhlelo lokuphakelayo lwe-limestone crusher engunombolo 3 e-Anhui Chaohu Cement Plant lusebenzisa i-1500 × 12000 plate feeder, futhi injini yokushayela isebenzisa injini ye-Y225M-4 AC enamandla alinganiselwe angu-45kW kanye namandla amanje alinganiselwe angu-84.6A. Ngaphambi kokuguqulwa kokulawulwa kwesivinini sokuguqulwa kwemvamisa, kutholakale ngokuhlola ukuthi lapho isiphakeli sepuleti sishayela imoto ngokujwayelekile, isilinganiso samanje sezigaba ezintathu singu-30A kuphela, okungama-35.5% kuphela wamanje olinganisiwe wemoto. Ukuze kongiwe utshalomali, kukhethwe i-ACS601-0060-3 i-frequency converter, enomthamo ophumayo olinganiselwe ongu-76A futhi ifanele ama-motor angama-4-pole anamandla angu-37kW, okuzuza ukusebenza kahle.
Lezi zibonelo ezimbili zibonisa ukuthi kumaphrojekthi okulungisa angazange asebenzise iziguquli zemvamisa ekuqaleni, ukukhetha umthamo wesiguquli semvamisa ngokusekelwe ezimeni zangempela zokusebenza kunganciphisa kakhulu ukutshalwa kwezimali.
Umbono oyiphutha 3: Izinjini ezijwayelekile zingasebenza kuphela ngesivinini esincishisiwe zisebenzisa iziguquli zemvamisa ezingaphansi kwesivinini sazo sokudlulisela esilinganiselwe
Ithiyori yakudala ithi umkhawulo ongaphezulu wemvamisa yemoto yonke indawo ngu-55Hz. Lokhu kungenxa yokuthi uma isivinini semoto sidinga ukulungiswa ngaphezu kwesivinini esilinganiselwe sokusebenza, imvamisa ye-stator izokwenyuka ngaphezu kwefrikhwensi elinganiselwe (50Hz). Kuleli qophelo, uma isimiso se-torque esingaguquki sisalandelwa ukuze silawule, i-voltage ye-stator izokwenyuka idlule i-voltage elinganiselwe. Ngakho-ke, lapho ububanzi besivinini bungaphezu kwesivinini esilinganiselwe, i-voltage ye-stator kufanele igcinwe ingashintshi ku-voltage elinganiselwe. Kuleli qophelo, njengoba isivinini/imvamisa yanda, i-flux kazibuthe izokwehla, okuholela ekwehleni kwe-torque ku-stator yamanje efanayo, ukuthambisa izici zemishini, kanye nokuncipha okuphawulekayo komthamo wokugcwala kwemoto.
Kulokhu, kungabonakala ukuthi umkhawulo ophezulu wemvamisa yemoto yonke indawo ngu-55Hz, okuyisidingo:
1. I-voltage ye-stator ayikwazi ukudlula i-voltage elinganiselwe;
2. Injini isebenza ngamandla alinganiselwe;
3. Umthwalo we-torque njalo.
Kulesi simo esingenhla, ithiyori kanye nokuhlola kufakazele ukuthi uma imvamisa idlula i-55Hz, i-torque yemoto izokwehla, izici zomshini zizoba thambile, umthamo wokugcwala uzokwehla, ukusetshenziswa kwensimbi kuzokhuphuka ngokushesha, futhi ukushisa kuzoba nzima.
Umbhali ukholelwa ukuthi izimo zokusebenza zangempela zama-motor kagesi zibonisa ukuthi ama-motor-purpose-purpose angasheshiswa ngokusebenzisa abaguquli bemvamisa. Ingabe isivinini esishintshashintshayo singanyuswa? Yimalini engakhushulwa? Inqunywa ngokuyinhloko umthwalo odonswa injini kagesi. Okokuqala, kuyadingeka ukunquma ukuthi liyini izinga lomthwalo? Okwesibili, kuyadingeka ukuqonda izici zomthwalo futhi wenze izibalo ngokusekelwe esimweni esithile somthwalo. Ukuhlaziya kafushane kanje:
1. Eqinisweni, ku-380V motor universal, kungenzeka ukuyisebenzisa isikhathi eside lapho i-voltage ye-stator idlula i-10% ye-voltage elinganisiwe, ngaphandle kokuthinta ukufakwa kanye nokuphila kwemoto. I-voltage ye-stator iyanda, i-torque ikhula kakhulu, i-stator yamanje iyancipha, futhi izinga lokushisa lomoya liyancipha.
2. Izinga lokulayisha lemoto kagesi livamise ukuba ngu-50% kuya ku-60%
Ngokuvamile, izinjini zezimboni zisebenza ku-50% kuya ku-60% wamandla awo alinganisiwe. Ngokubala, lapho amandla okukhipha imoto engama-70% wamandla alinganisiwe futhi i-voltage ye-stator ikhuphuka ngo-7%, i-stator yamanje iyancipha ngo-26.4%. Ngalesi sikhathi, ngisho nokulawulwa kwe-torque njalo futhi usebenzisa isiguquli sokuphindaphinda ukwandisa isivinini se-motor ngo-20%, i-stator yamanje ayigcini nje ngokunyuka kodwa futhi iyancipha. Nakuba ukulahlekelwa kwensimbi ye-motor kukhula kakhulu ngemva kokwandisa imvamisa, ukushisa okukhiqizwa yikho akunakwa uma kuqhathaniswa nokushisa okuncishisiwe ukwehla kwe-stator current. Ngakho-ke, izinga lokushisa le-motor winding nalo lizokwehla kakhulu.
3. Kunezici ezihlukahlukene zomthwalo
Uhlelo lwe-electric motor drive lunikeza umthwalo, futhi imithwalo ehlukene inezici ezihlukene zemishini. Amamotho kagesi kufanele ahlangabezane nezidingo zomthwalo wezimpawu zemishini ngemuva kokusheshisa. Ngokwezibalo, ubuningi obuvumelekile bokusebenza (fmax) bokulayisha kwetorque engaguquki ngamanani ahlukene okulayisha (k) ahambisana ngokuphambene nezinga lokulayisha, okungukuthi fmax=fe/k, lapho i-fe kuyisilinganiso samandla esilinganiselwe. Ngokulayishwa kwamandla okungaguquki, imvamisa yokusebenza ephezulu evumelekile yamamotho ajwayelekile inqunyelwe ikakhulukazi amandla omshini we-motor rotor kanye ne-shaft. Umbhali ukholelwa ukuthi kuvame ukutuseka ukuthi ukhawule ku-100Hz.
Isibonelo sohlelo lokusebenza:
I-chain bucket conveyor efektri ethile inomthwalo we-torque ongaguquki, futhi ngenxa yokwanda kokukhiqizwa, isivinini sayo semoto sidinga ukunyuswa ngo-20%. Imodeli yemoto yi-Y180L-6, inamandla alinganiselwe angu-15kW, i-voltage elinganiselwe engu-380V, yamanje elinganiselwe ye-31.6A, isivinini esilinganiselwe esingu-980r/min, ukusebenza kahle kuka-89.5%, isici samandla esingu-0.81, i-current operating 18-20A, i-current rate of 18-20A, izinga eliphezulu lomthwalo we-7.5k amandla okusebenza ngaphansi%. Ngemva kokufaka i-CIMR-G5A4015 i-frequency converter, imvamisa yokusebenza ingu-60Hz, ijubane likhuphuka ngo-20%, umthamo omkhulu wokukhipha i-voltage ye-frequency converter isethelwe ku-410V, ukusebenza kwamanje kwe-motor ngu-12-15A, ehla cishe ngo-30%, futhi izinga lokushisa lokuhamba kwemoto liyancipha kakhulu.
Umbono oyiphutha 4: Ukunganaki izici zemvelo zeziguquli zemvamisa
Umsebenzi wokulungisa iphutha we-converter frequency ngokuvamile uqedwa ngumsabalalisi, futhi ngeke kube nezinkinga. Ukufakwa kwesiguquli sefrikhwensi kulula futhi kuvame ukuqedwa ngumsebenzisi. Abanye abasebenzisi abalifundi ngokucophelela imanuwali yomsebenzisi yesiguquli sefrikhwensi, abazilandeli ngokuqinile izidingo zobuchwepheshe bokwakha, baziba izici zesiguquli semvamisa ngokwaso, basilinganisa nezakhi zikagesi ezijwayelekile, futhi benze ngokususelwa ekucabangeni nakwisipiliyoni, babeke izingozi ezifihliwe zamaphutha nezingozi.
Ngokuya ngebhukwana lomsebenzisi lesiguquli sefrikhwensi, ikhebula elixhunywe kumotho kufanele kube ikhebula elivikelwe noma ikhebula le-armored, okungcono kakhulu elibekwe eshubhu lensimbi. Iziphetho zekhebula elisikiwe kufanele zibe zinhle ngangokunokwenzeka, izingxenye ezingavinjiwe kufanele zibe zifushane ngangokunokwenzeka, futhi ubude bekhebula akufanele budlule ibanga elithile (ngokuvamile lingama-50m). Uma ibanga lezintambo phakathi kwesiguquli semvamisa kanye nenjini lilide, ukuvuza okuphezulu kwe-harmonic kusuka kukhebula kuzoba nemiphumela emibi kusiguquli semvamisa kanye nemishini ezungezile. Intambo yaphansi ebuyisiwe isuka kumotho elawulwa isiguquli sefrikhwensi kufanele ixhunywe ngokuqondile kutheminali yaphansi ehambisanayo yesiguquli sefrikhwensi. Intambo yaphansi yesiguquli se-frequency akufanele yabiwe nemishini yokushisela kanye nemishini yamandla, futhi kufanele ibe mfushane ngangokunokwenzeka. Ngenxa yokuvuza kwamanje okukhiqizwa isiguquli sefrikhwensi, uma sikude kakhulu nendawo yaphansi, amandla etheminali yaphansi ngeke azinze. Ubuncane bendawo ephambanayo yentambo yaphansi yesiguquli sefrikhwensi kufanele ibe nkulu noma ilingane nendawo ephambanayo yentambo yokuphakela amandla. Ukuvimbela ukungasebenzi kahle okubangelwa ukuphazamiseka, izintambo zokulawula kufanele zisebenzise izintambo ezivikelwe ezisontekile noma izintambo ezinezivikelo eziphindwe kabili. Ngesikhathi esifanayo, qaphela ukuthi ungathinti ikhebula lenethiwekhi elivikelwe ngeminye imigqa yesignali kanye nama-casings wemishini, bese uyisonga nge-tape yokuvikela. Ukuze ugweme ukuthintwa umsindo, ubude bekhebula lokulawula akufanele budlule ku-50m. Intambo yokulawula kanye nekhebula lemoto kufanele kubekwe ngokuhlukana, kusetshenziswa amathreyi ekhebula ahlukene, futhi kugcinwe kude ngangokunokwenzeka. Lapho lezi ezimbili kufanele ziwele, kufanele ziwele zibheke phezulu. Ungalokothi uwafake epayipini elifanayo noma ethreyini yekhebula. Kodwa-ke, abanye abasebenzisi abazange balandele ngokuqinile lezi zidingo ezingenhla lapho bebeka izintambo, okuholele ekutheni okokusebenza kusebenze ngokujwayelekile ngesikhathi sokulungisa iphutha ngakunye kodwa kubangele ukuphazamiseka okukhulu ngesikhathi sokukhiqiza okuvamile, okuwenza ukuthi angakwazi ukusebenza.
Uma izinga lokushisa lomoya lesibili lesitshalo sikasimende libonisa ukufundwa okungavamile: inani elibonisiwe liphansi kakhulu futhi lishintshashintsha kakhulu. Bekuhamba kahle kakhulu ngaphambi kwalokhu. Ama-thermocouples ahloliwe, izidluliseli zokushisa, nezinsimbi zesibili, azikho izinkinga ezitholakele. Yiziphi ezifanele? Lapho ithuluzi liyiswa kwenye indawo yokulinganisa, lalisebenza ngokujwayelekile ngokuphelele. Nokho, lapho amathuluzi afanayo asuka kwamanye amaphuzu okulinganisa eshintshwa lapha, kwenzeka okufanayo. Kamuva, kwatholakala ukuthi isiguquli sefrikhwensi esisha sasifakwe enjinini yesiphephetha-moya esingunombolo 3 ku-cooler ye-grate, futhi kwaba ngemva kokuba isiguquli sefrikhwensi sisetshenzisiwe lapho igeji yesibili yokushisa yomoya yabonisa ukufundwa okungavamile. Misa isiguquli semvamisa bese ubuyisela ngokushesha igeji yesibili yokushisa komoya kokujwayelekile; Iqala kabusha isiguquli sefrikhwensi, igeji yesibili yokushisa komoya yabonisa ukufundwa okungavamile futhi. Ngemva kokuhlola okuphindaphindiwe izikhathi eziningana, kwanqunywa ukuthi ukuphazamiseka okuvela kusiguquli semvamisa kwakuyimbangela eqondile yokubonisa okungavamile kugeji yesibili yokushisa komoya. I-fan iyi-ventilator eyi-centrifugal, ekuqaleni eyayisebenzisa ama-valve ukulungisa ivolumu yomoya, kodwa kamuva yashintshela ekulawuleni isivinini esishintshashintshayo ukuze kulungiswe ivolumu yomoya. Ngenxa yobuningi bothuli nendawo ezungezile enokhahlo esizeni, isiguquli sefrikhwensi sifakwe egunjini lokulawula le-MCC (Motor Control Center). Ukuze kube lula ukwakha, isiguquli sefrikhwensi sixhunywe ohlangothini olungezansi lwesixhumi esiyinhloko se-fan, futhi ikhebula elikhiphayo le-frequency converter isebenzisa intambo yamandla ye-fan motor. Ikhebula lamandla lenjini yesiphephethali iyikhebula le-PVC elivalekile elingeyona insimbi eyisivikelo, futhi libekwe ngokuhambisana nekhebula lesignali yemitha yokushisa komoya yesibili ezingxenyeni ezihlukene zebhuloho zomsele wekhebula ofanayo. Kungabonakala ukuthi kungenxa yokuthi ikhebuli yokuphumayo yesiguquli semvamisa ayisebenzisi izintambo ezihlomile noma ibekwe ngamapayipi ensimbi okwenza kube khona ukuphazamiseka. Lesi sifundo kufanele sinikezwe ukunakwa okukhethekile kumaphrojekthi wokuvuselela angazange ekuqaleni asebenzise ama-frequency converter.
Ukunakekelwa okukhethekile kufanele futhi kuthathwe ekugcinweni kwansuku zonke kwama-frequency converters. Abanye abasebenza ngogesi bavula ngokushesha isiguquli ukuze silungiswe ngokushesha nje lapho bebona iphutha bese beyikhuba. Lokhu kuyingozi kakhulu futhi kungase kubangele izingozi zomuntu siqu zikagesi. Lokhu kungenxa yokuthi ngisho noma isiguquli sefrikhwensi singasebenzi noma ukunikezwa kwamandla kunqanyuliwe, kungase kube khona i-voltage kulayini wokufaka wamandla, isiphetho se-DC, nesiphetho semoto yesiguquli sefrikhwensi ngenxa yokuba khona kwama-capacitor. Ngemuva kokunqamula ukuxhuma, kuyadingeka ukulinda imizuzu embalwa ukuze isiguquli semvamisa siphume ngokuphelele ngaphambi kokuqala ukusebenza. Abanye ochwepheshe bakagesi bajwayele ukwenza ngokushesha izivivinyo zokuvala intuthu eshayelwa i-variable frequency drive system besebenzisa itafula elinyakazayo lapho bebona ukuthi uhlelo luyakhubeka, ukuze kutholwe ukuthi injini ishile yini. Lokhu futhi kuyingozi kakhulu, njengoba kungabangela kalula ukuthi isiguquli semvamisa sishise. Ngakho-ke, ngaphambi kokunqamula ikhebula phakathi kwenjini kanye nesiguquli sefrikhwensi, ukuhlolwa kwe-insulation akumele kwenziwe kumotho, noma kukhebula esivele ixhunywe kusiguquli sefrikhwensi.