- 1. I-voltage kunye nokuhambelana kwangoku
(1) Umbane wezigaba ezithathu (380V)
Ukukhethwa kwe-voltage elinganisiweyo: I-voltage yokumelana ne-thyristor kufuneka ibe ubuncinane amaxesha angama-1.5 amandla ombane osebenzayo (kucetyiswa ukuba ube ngaphezu kwe-600V) ukujamelana ne-voltage ephezulu kunye nokugqithisa okwethutyana.
Ubalo lwangoku: Umthamo wesigaba sesithathu kufuneka ubalwe ngokusekelwe kumandla apheleleyo (afana ne-48kW), kwaye umlinganiselo ophakanyisiweyo wangoku u-1.5 amaxesha akhoyo ngoku (njengomthwalo we-73A, khetha i-125A-150A thyristor).
Ulawulo lokulinganisela: Indlela yokulawula inqanaba lesibini inokubangela ukuhla kwamandla kunye nokuguquguquka kwangoku. I-Zero-cross trigger okanye imodyuli yokulawula i-phase-shift kufuneka ifakwe ukunciphisa ukuphazamiseka kwigridi yamandla.
(2) Umbane wezigaba ezibini (380V)
Ukulungiswa kwe-voltage: Umbane wesigaba ezibini ngokwenene yisigaba esisodwa se-380V, kwaye i-thyristor ye-bidirectional (efana nochungechunge lwe-BTB) kufuneka ikhethwe, kwaye i-voltage yokumelana nayo kufuneka ibe ngaphezu kwe-600V.
Ulungelelwaniso lwangoku: Isigaba sesibini sangoku siphezulu kunesigaba sesithathu sangoku (ezifana malunga ne-13.6A kumthwalo we-5kW), kunye nomda omkhulu wangoku kufuneka ukhethwe (njengaphezulu kwe-30A).
2. Iintambo kunye neendlela zokuqalisa
(1) Izigaba ezithathu zocingo:
Qinisekisa ukuba imodyuli ye-thyristor idibaniswe kwichungechunge ekupheleni kokufakwa komgca wesigaba, kwaye umgca wesignali we-trigger kufuneka ube mfutshane kwaye uhlukaniswe kwezinye iilayini ukuze ugweme ukuphazamiseka. Ukuba i-zero-cross triggering (indlela ye-solid-state relay) isetyenzisiwe, i-harmonics ingancitshiswa kodwa ukuchaneka kokulawulwa kwamandla kufuneka kube phezulu; kwi-phase-shift triggering, ingqalelo kufuneka ihlawulwe kwireyithi yokutshintsha kwamandla ombane (du/dt) ukhuseleko, kunye ne-resistor-capacitor absorption circuit (efana ne-0.1μF capacitor + 10Ω resistor) kufuneka ifakwe.
(2) izigaba ezimbini zocingo:
I-thyristors ye-Bidirectional kufuneka ihlule ngokuchanekileyo phakathi kweepali ze-T1 kunye ne-T2, kwaye i-pali yokulawula (G) i-trigger signal kufuneka ihambelane nomthwalo. Kuyacetyiswa ukuba usebenzise i-optocoupler trigger esecaleni ukuphepha ukudityaniswa kakubi.
3. Ukutshatyalaliswa kobushushu kunye nokukhusela
(1) Iimfuno zokulahla ubushushu:
Xa i-current idlula i-5A, i-heat sink kufuneka ifakwe, kunye negrisi ye-thermal kufuneka isetyenziswe ukuqinisekisa uqhagamshelwano oluhle. Ubushushu beqokobhe kufuneka bulawuleke ngaphantsi kwe-120℃, kwaye ukupholisa umoya ngenkani kufuneka kusetyenziswe xa kukho imfuneko.
(2) Amanyathelo okhuseleko:
Ukukhuselwa kwe-overvoltage: I-Varistors (efana nochungechunge lwe-MYG) ifunxa amandla ombane aphezulu.
Ukukhuselwa ngokugqithisileyo: i-fuse ekhawulezayo idibaniswe kwichungechunge kwisiphaluka se-anode, kwaye i-current rated current yi-1.25 amaxesha e-thyristor.
Umda wesantya sokutshintsha i-Voltage: i-parallel RC damping network (efana ne-0.022μF/1000V capacitor).
4. Into yamandla kunye nokusebenza kakuhle
Kwinkqubo yesigaba sesithathu, ulawulo lokutshintshwa kwesigaba lunokubangela ukuba umbane unciphise, kwaye i-capacitors yembuyekezo kufuneka ifakwe kwicala le-transformer.
Inkqubo yesigaba ezibini ixhomekeke kwi-harmonics ngenxa yokungalingani komthwalo, ngoko kuyacetyiswa ukuba uthabathe i-zero-cross trigger okanye isicwangciso sokulawula ukwabelana ngexesha.
5. Ezinye izinto eziqwalaselwayo
Isiphakamiso sokukhetha: nikela kuqala kwiimodyuli ze-thyristors (ezifana ne-Siemens brand), edibanisa imisebenzi yokuvuselela kunye nokukhusela kunye nokwenza lula i-wiring.
Ukuhlolwa kwesondlo: sebenzisa rhoqo i-multimeter ukufumanisa imeko yokuqhubela i-thyristor ukuphepha isiphaluka esifutshane okanye isiphaluka esivulekileyo; thintela ukusetyenziswa kwe-megohmmeter ukuvavanya ukugquma.
Ukuba ufuna ukwazi ngakumbi malunga nemveliso yethu, ncedaQhagamshelana nathi!
Ixesha lokuposa: Jul-16-2025
