Amamotho ajwayelekile aklanywe ngokuya ngefrikhwensi engashintshi kanye ne-voltage engaguquki, futhi awakwazi ukuhlangabezana ngokugcwele nezidingo zokulawulwa kwesivinini sokuguqula imvamisa, ngakho-ke awakwazi ukusetshenziswa njengamamotho okuguqula imvamisa .
Umehluko phakathi kwe-variable frequency motor kanye ne-motor ejwayelekile ubonakala ikakhulukazi kulezi zici ezimbili ezilandelayo:
Okokuqala, ama-motor ajwayelekile angasebenza kuphela isikhathi eside eduze nemvamisa yamandla, kuyilapho ama-motor frequency motors angasebenza isikhathi eside ngaphansi kwezimo eziphakeme kakhulu noma eziphansi kunemvamisa yamandla; isibonelo, imvamisa yamandla ezweni lethu i-50Hz. , uma injini evamile iku-5Hz isikhathi eside, izohluleka maduze noma yonakaliswe; kanye nokubukeka kwe-variable frequency motor kuxazulula lokhu kuntuleka kwenjini evamile;
Okwesibili, izinhlelo zokupholisa zamamotho ajwayelekile kanye nama-motor frequency frequency ahlukile.Isistimu yokupholisa yemoto evamile ihlobene eduze nesivinini sokujikeleza. Ngamanye amazwi, lapho injini iphenduka ngokushesha, ngcono uhlelo lokupholisa, futhi ukuhamba kancane kwemoto, umphumela wokupholisa uba ngcono, kuyilapho i-motor frequency motor ingenayo le nkinga.
Ngemuva kokwengeza isiguquli sefrequency motor ejwayelekile, ukusebenza kokuguqula imvamisa kungenziwa, kepha akuyona injini yokuguqula imvamisa yangempela. Uma isebenza ngaphansi kwesimo sokungewona amandla isikhathi eside, injini ingase yonakaliswe.
01 Umthelela wesiguquli sefrikhwensi kumotho ikakhulukazi ekusebenzeni kahle nasekukhuphukeni kwezinga lokushisa kwemoto
I-inverter ingakwazi ukukhiqiza amazinga ahlukene we-harmonic voltage kanye namanje ngesikhathi sokusebenza, ukuze injini isebenze ngaphansi kwe-voltage engeyona ye-sinusoidal kanye yamanje. , okubaluleke kakhulu ukulahleka kwethusi kwe-rotor, lokhu kulahlekelwa kuzokwenza injini ifudumale okwengeziwe, inciphise ukusebenza kahle, inciphise amandla okukhiphayo, futhi ukukhuphuka kwezinga lokushisa kwamamotho avamile ngokuvamile kukhuphuke ngo-10% -20%.
02 Amandla okufakelwa kwenjini
Imvamisa yesiguquli se-frequency converter isuka ezinkulungwaneni ezimbalwa iye ngaphezulu kwe-kilohertz eyishumi, ukuze ukuma kwe-stator kwenjini kumele imelane nezinga eliphakeme lokunyuka kwama-voltage, elilingana nokusebenzisa i-voltage ekhuphukayo enjini, okwenza I-inter-turn insulation ye-motor imelana nokuhlolwa okubucayi kakhulu. .
03 Umsindo we-electromagnetic we-Harmonic nokudlidliza
Lapho injini evamile inikwa amandla isiguquli semvamisa, ukudlidliza nomsindo obangelwa i-electromagnetic, mechanical, ventilation nezinye izici kuzoba nzima kakhulu. Ama-harmonics aqukethwe kugesi wefrikhwensi eguquguqukayo aphazamisa i-harmonics yesikhala yengxenye ye-electromagnetic yenjini ukuze akhe amandla ahlukahlukene ashukumisayo kagesi, ngaleyo ndlela andise umsindo. Ngenxa yobubanzi befrikhwensi yokusebenza kwenjini kanye nobubanzi obubanzi bokuhlukahluka kwejubane elijikelezayo, kunzima kumaza amaza ahlukahlukene wamandla kazibuthe kagesi ukugwema imvamisa yokudlidliza yemvelo yelungu ngalinye lesakhiwo semoto.
04 Izinkinga zokupholisa nge-rpm ephansi
Uma imvamisa yokunikezwa kwamandla iphansi, ukulahlekelwa okubangelwa ama-harmonics aphezulu ekunikezeni amandla kukhulu; okwesibili, lapho isivinini se-motor sincipha, umthamo womoya wokupholisa uyancipha ngokulingana okuqondile ne-cube yejubane, okuholela ekushiseni kwe-motor kungaqedwa futhi izinga lokushisa likhuphuke kakhulu. ukwanda, kunzima ukufeza ukuphuma kwe-torque njalo.
05Ngokubuka lesi simo esingenhla, injini yokuguqula imvamisa isebenzisa lo mklamo olandelayo
Yehlisa ukumelana kwe-stator ne-rotor ngangokunokwenzeka futhi unciphise ukulahlekelwa kwethusi kwegagasi eliyisisekelo ukuze wenze ukwanda kokulahlekelwa kwethusi okubangelwa ama-harmonics aphezulu.
Inkambu kazibuthe eyinhloko ayigcwalisiwe, enye iwukucabangela ukuthi ama-harmonics aphezulu azojulisa ukugcwala kwesekethe kazibuthe, kanti enye iwukucabangela ukuthi i-voltage ephumayo ye-inverter ingakhushulwa ngokufanele ukuze kwandiswe i-torque ephumayo. amaza.
Idizayini yesakhiwo ikakhulukazi ukuthuthukisa izinga lokufakwa kwe-insulation; izinkinga zokudlidliza nomsindo wemoto zicatshangelwa ngokugcwele; indlela yokupholisa isebenzisa ukupholisa komoya okuphoqelekile, okungukuthi, isiphepheli esikhulu sokupholisa i-motor ithatha imodi yokushayela imoto ezimele, futhi umsebenzi wefeni yokupholisa ngempoqo uwukuqinisekisa ukuthi injini igijima ngesivinini esiphansi. ukupholisa phansi.
I-coil distributed capacitance ye-variable frequency motor incane, futhi ukumelana kweshidi lensimbi ye-silicon kukhulu, ukuze umthelela we-high-frequency pulses emotweni ube mncane, futhi umphumela wokuhlunga we-inductance we-motor ungcono.
Ama-motor ajwayelekile, okungukuthi, ama-motor frequency motor, adinga kuphela ukucabangela inqubo yokuqala kanye nezimo zokusebenza zephuzu elilodwa lokuvama kwamandla (inombolo yomphakathi: othintana nabo be-electromechanical), bese uklama injini; kuyilapho ama-motor frequency motors adinga ukucabangela inqubo yokuqala kanye nezimo zokusebenza zawo wonke amaphuzu ngaphakathi kwebanga lokuguqula imvamisa, bese akha injini.
Ukuze uvumelane nobubanzi be-PWM obuguquguqukayo be-analog sinusoidal eshintshashintshayo okukhiphayo kwamanje yi-inverter, equkethe ama-harmonics amaningi, umsebenzi wemoto eguquguqukayo eyenziwe ngokukhethekile ungaqondwa njenge-reactor kanye nenjini evamile.
01 Umehluko phakathi kwe-motor ejwayelekile kanye ne-variable frequency motor structure
1. Izidingo zokuvikela eziphakeme
Ngokuvamile, izinga lokufakwa kwe-insulation lenjini yokuguqula imvamisa lingu-F noma ngaphezulu, futhi ukufakwa komhlabathi namandla okufaka amajika kufanele kuqiniswe, ikakhulukazi ikhono le-insulation lokumelana ne-voltage yomfutho.
2. Izidingo zokudlidliza nomsindo zamamotho amafrikhwensi aguquguqukayo ziphezulu
Injini yokuguqula imvamisa kufanele icabangele ngokugcwele ukuqina kwezingxenye zemoto kanye nayo yonke, futhi izame ukukhulisa imvamisa yayo yemvelo ukuze igweme ukuzwakala kwegagasi ngalinye lamandla.
3. Indlela yokupholisa ye-variable frequency motor ihlukile
I-frequency conversion motor ngokuvamile isebenzisa ukupholisa komoya okuphoqelekile, okungukuthi, ifeni enkulu yokupholisa imoto ishayelwa injini ezimele.
4. Izidingo ezehlukene zezinyathelo zokuvikela
Izinyathelo zokuvikela ezithwalayo kufanele zamukelwe ezinjinini ezishintshashintshayo ezinamandla angaphezu kuka-160kW.Isizathu esiyinhloko ukuthi kulula ukukhiqiza i-asymmetrical magnetic circuit, futhi iphinde ikhiqize i-shaft current. Lapho ama-currents akhiqizwa ezinye izingxenye ze-high-frequency esebenza ndawonye, i-shaft current izokwanda kakhulu, okuholela ekuthwaleni umonakalo, ngakho-ke izinyathelo zokuvimbela zivame ukuthathwa.Ukuze uthole amandla aguquguqukayo emoto njalo, lapho ijubane lidlula i-3000/min, amafutha akhethekile anokumelana nokushisa okuphezulu kufanele asetshenziselwe ukunxephezela ukukhuphuka kwezinga lokushisa lokuthwala.
5. Izinhlelo zokupholisa ezihlukene
I-variable frequency motor cooling fan inikwa amandla amandla azimele ukuze kuqinisekiswe umthamo wokupholisa oqhubekayo.
02 Umehluko phakathi kwe-motor ejwayelekile kanye ne-variable frequency motor design
1. I-Electromagnetic Design
Kumamotor ajwayelekile angama-asynchronous, imingcele yokusebenza eyinhloko ecatshangelwe ekwakhiweni umthamo wokulayisha ngokweqile, ukusebenza kokuqala, ukusebenza kahle kanye nesici samandla.I-motor frequency eguquguqukayo, ngoba isiliphu esibucayi silingana ngokuphambene nemvamisa yamandla, singaqalwa ngokuqondile lapho isiliphu esibucayi siseduze no-1. Ngakho-ke, umthamo wokulayisha ngokweqile nokusebenza kokuqala akudingeki kucatshangelwe kakhulu, kodwa ukhiye inkinga okufanele ixazululwe ukuthi ungayithuthukisa kanjani i-motor pair. Ukuzivumelanisa nokusetshenziswa kwamandla okungewona we-sinusoidal.
2. Umklamo Wesakhiwo
Lapho uklama isakhiwo, kuyadingeka futhi ukuthi ucabangele umthelela wezimpawu zokuphakelwa kwamandla okungewona we-sinusoidal esakhiweni se-insulation, ukudlidliza, nezindlela zokupholisa umsindo zenjini yefrikhwensi eguquguqukayo.
Isikhathi sokuthumela: Oct-24-2022