- 1. I-voltage nokumatanisa kwamanje
(1) Ugesi wezigaba ezintathu (380V)
Ukukhetha i-voltage elinganiselwe: I-voltage emelene ne-thyristor kufanele okungenani ibe izikhathi ezingu-1.5 ku-voltage yokusebenza (okutuswa ukuthi ibe ngaphezu kuka-600V) ukuze ibhekane ne-peak voltage kanye nokweqisa kwesikhashana.
Isibalo samanje: Umthwalo wamanje wezigaba ezintathu udinga ukubalwa ngokusekelwe kumandla aphelele (afana no-48kW), futhi isilinganiso samanje esinconywayo siwu-1.5 wamanje wangempela (njengomthwalo ongu-73A, khetha u-125A-150A thyristor).
Ukulawula ibhalansi: Indlela yokulawula yezigaba ezintathu ingabangela ukwehla kwesici samandla kanye nokuguquguquka kwamanje. Inhlamvu ye-Zero-crossing noma imojuli yokulawula i-phase-shift idinga ukufakwa ukuze kuncishiswe ukuphazamiseka kwegridi yamandla.
(2) Ugesi wezigaba ezimbili (380V)
Ukulungiswa kwe-voltage: Ugesi wezigaba ezimbili empeleni uyisigaba esisodwa esingu-380V, futhi i-thyristor ye-bidirectional (efana nochungechunge lwe-BTB) idinga ukukhethwa, futhi i-voltage ye-withstand nayo idinga ukuba ngaphezu kuka-600V.
Ukulungiswa kwamanje: Umthamo wezigaba ezimbili uphakeme kunowamanje wezigaba ezintathu (njengokuthi cishe u-13.6A kumthwalo ongu-5kW), futhi imajini yamanje enkulu idinga ukukhethwa (njengangaphezulu kuka-30A).
2. Izintambo nezindlela zokucupha
(1) Izintambo zezigaba ezintathu:
Qinisekisa ukuthi imojuli ye-thyristor ixhunywe ochungechungeni ekugcineni kokufaka komugqa wesigaba, futhi ulayini wesignali yokuqalisa kufanele ube mfushane futhi uhlukaniswe kweminye imigqa ukuze ugweme ukuphazamiseka. Uma i-triggering ye-zero-crossing (indlela ye-solid-state relay) isetshenziswa, ama-harmonics angancishiswa kodwa ukunemba kokulawulwa kwamandla kuyadingeka ukuba kube phezulu; ngokubangela ukuguqulwa kwesigaba, ukunakwa kufanele kukhokhwe ekuvikelweni kwesilinganiso sokushintsha kwamandla kagesi (du/dt), kanye nesekhethi yokumunca i-resistor-capacitor (njenge-0.1μF capacitor + 10Ω resistor) kufanele ifakwe.
(2) Izintambo zezigaba ezimbili:
Ama-thyristors e-Bidirectional kufanele ahlukanise kahle phakathi kwezigxobo ze-T1 kanye ne-T2, kanye nesignali ye-trigger yesigxobo sokulawula (G) kufanele ivumelaniswe nomthwalo. Kunconywa ukusebenzisa i-optocoupler trigger ehlukanisiwe ukuze ugweme ukungaxhumeki kahle.
3. Ukukhipha ukushisa nokuvikela
(1) Izidingo zokukhipha ukushisa:
Uma i-current idlula i-5A, kufanele kufakwe isinki sokushisa, futhi kufakwe amafutha ashisayo ukuze kuqinisekiswe ukuthintana okuhle. Ukushisa kwegobolondo kufanele kulawulwe ngaphansi kwe-120 ℃, futhi ukupholisa komoya okuphoqelekile kufanele kusetshenziswe uma kunesidingo.
(2) Izinyathelo zokuvikela:
Ukuvikelwa kwe-overvoltage: Ama-Varistors (afana nochungechunge lwe-MYG) amunca i-voltage ephezulu yesikhashana.
Ukuvikela okudlulele: i-fuse evuthela ngokushesha ixhunywe ochungechungeni lwesekethe ye-anode, futhi okwamanje okulinganiselwe izikhathi ezingu-1.25 kune-thyristor.
Umkhawulo wesilinganiso sokushintsha kwamandla kagesi: inethiwekhi yokudambisa i-RC ehambisanayo (njenge-0.022μF/1000V capacitor).
4. Isici samandla nokusebenza kahle
Kuhlelo lwezigaba ezintathu, ukulawulwa kokushintsha kwesigaba kungase kubangele ukuthi isici samandla sinciphe, futhi ama-capacitor esinxephezelo adinga ukufakwa ohlangothini lwe-transformer.
Isistimu yezigaba ezimbili ijwayele ukuhambisana ne-harmonic ngenxa yokungalingani komthwalo, ngakho-ke kuyanconywa ukusebenzisa i-trigger yokuwela iqanda noma isu lokulawula ukwabelana kwesikhathi.
5. Okunye okucatshangelwayo
Izincomo zokukhetha: nikeza kuqala ama-thyristors e-modular (njenge-Siemens brand), ahlanganisa imisebenzi yokucupha nokuvikela futhi enze izintambo zibe lula.
Ukuhlolwa kwesondlo: sebenzisa njalo i-multimeter ukuze uthole isimo sokuqhuba se-thyristor ukuze ugweme isifunda esifushane noma isifunda esivulekile; vimbela ukusetshenziswa kwe-megohmmeter ukuhlola ukwahlukanisa.
Uma ufuna ukwazi okwengeziwe ngomkhiqizo wethu, sicelaXhumana nathi!
Isikhathi sokuthumela: Jul-16-2025
