Okokuqala, kufuneka sinciphise umda wengxoxo ukunqanda ukuyenza ingacacanga kakhulu. Ijenereyitha ekuxoxwe ngayo apha ibhekisa kwibrushless, isigaba sesithathu sejenereyitha ye-AC ehambelanayo, emva koku kubhekiselwa kuyo kuphela njenge "jenereyitha".
Olu hlobo lwejenereyitha luqulathe ubuncinci iinxalenye ezintathu eziphambili, eziya kukhankanywa kule ngxoxo ilandelayo:
Ijeneretha ephambili, eyahlulwe kwi-stator ephambili kunye ne-rotor ephambili; I-rotor ephambili ibonelela ngentsimi yamagnetic, kwaye i-stator ephambili ivelisa umbane ukubonelela umthwalo; I-Exciter, ihlukaniswe kwi-exciter stator kunye ne-rotor; I-stator ye-exciter inikezela ngentsimi yamagnetic, i-rotor ivelisa umbane, kwaye emva kokulungiswa ngumqhubi ojikelezayo, inika amandla kwi-rotor enkulu; I-Automatic Voltage Regulator (AVR) ibona i-voltage ephumayo ye-generator engundoqo, ilawula i-coil ye-exciter stator, kwaye ifezekisa injongo yokuzinzisa umbane ophumayo we-stator engundoqo.
Inkcazo yomsebenzi wokuzinzisa amandla ombane we-AVR
Injongo yokusebenza ye-AVR kukugcina i-voltage ephumayo ye-generator ezinzileyo, eyaziwa ngokuba yi "voltage stabilizer".
Ukusebenza kwayo kukunyusa i-stator yangoku ye-exciter xa i-voltage ye-output ye-generator iphantsi kwexabiso elimiselweyo, elilingana nokunyusa i-excitation current ye-rotor engundoqo, ebangela ukuba i-voltage ye-generator iphakame kwixabiso elimiselweyo; Ngokuchasene noko, nciphisa i-excitation current kwaye uvumele i-voltage iyancipha; Ukuba i-voltage yemveliso ye-generator ilingana nexabiso elimiselweyo, i-AVR igcina imveliso ekhoyo ngaphandle kohlengahlengiso.
Ngaphaya koko, ngokobudlelwane besigaba phakathi kwangoku kunye nombane, imithwalo ye-AC inokwahlulwa ibe ngamacandelo amathathu:
Umthwalo ochasayo, apho ikhoyo ngoku ikwisigaba kunye nombane osetyenzisiweyo kuwo; Umthwalo we-inductive, isigaba se-lags yangoku emva kombane; Umthwalo we-Capacitive, isigaba sangoku siphambi kombane. Ukuthelekiswa kweempawu ezintathu zomthwalo kusinceda siqonde ngcono imithwalo ye-capacitive.
Kwimithwalo yokumelana, umthwalo omkhulu, ubukhulu becala lokuvuselela olufunekayo kwi-rotor ephambili (ukwenzela ukuzinzisa umbane wokuphuma kwejeneretha).
Kwingxoxo elandelayo, siya kusebenzisa i-excitation current efunekayo kwimithwalo echasayo njengomgangatho wokubhekisela, oku kuthetha ukuba ezinkulu zibhekiswa njengezinkulu; Siyibiza incinci kunayo.
Xa umthwalo we-generator u-inductive, i-rotor ephambili iya kufuna i-excitation current enkulu ukwenzela ukuba i-generator igcine i-voltage ephumayo ezinzileyo.
Umthwalo onamandla
Xa i-generator idibana nomthwalo we-capacitive, i-excitation current efunwa yi-rotor engundoqo incinci, oko kuthetha ukuba i-excitation current kufuneka incitshiswe ukwenzela ukuzinzisa umbane ophumayo we-generator.
Kwakutheni ukuze kwenzeke oku?
Sifanele sikhumbule ukuba i-current kumthwalo we-capacitive iphambi kwe-voltage, kwaye le misinga ehamba phambili (ehamba nge-stator eyintloko) iya kuvelisa i-induced current kwi-rotor engundoqo, eyenzeka ukuba igxininiswe ngokufanelekileyo kunye ne-excitation current, iphucula intsimi yamagnetic ye-rotor engundoqo. Ngoko umbane ovela kwi-exciter kufuneka uncitshiswe ukwenzela ukugcina i-voltage ephumayo ezinzileyo ye-generator.
Ubukhulu bomthwalo we-capacitive, encinci imveliso ye-exciter; Xa umthwalo we-capacitive ukhula kwinqanaba elithile, ukukhutshwa kwe-exciter kufuneka kuncitshiswe kwi-zero. Imveliso ye-exciter yi-zero, engumda we-generator; Ngeli xesha, i-voltage ye-output ye-generator ayiyi kuzinza, kwaye olu hlobo lonikezelo lwamandla alufanelekanga. Olu thintelo lukwabizwa ngokuba 'phantsi koxinzelelo lwe-excitation '.
Ijenereyitha inokwamkela kuphela umthamo olinganiselweyo womthwalo; (Ngokuqinisekileyo, kwijenereyitha ekhankanyiweyo, kukwakho imida kubungakanani bomthwalo ochasayo okanye ongenisayo.)
Ukuba iprojekthi ikhathazwa yimithwalo ye-capacitive, kunokwenzeka ukuba ukhethe ukusebenzisa imithombo yamandla e-IT ene-capacitance encinci nge-kilowatt, okanye usebenzise i-inductors yembuyekezo. Musa ukuvumela iseti yejenereyitha ukuba isebenze kufutshane nendawo “ephantsi kovuselelo”.
Ixesha lokuposa: Sep-07-2023
