ukuchithwa kwesithando somlilo isimiso sokusebenza – i-resonance ehambisanayo

ukunikezwa kwamandla okuvama

Ukunikezwa kwamandla kwesithando somlilo esincibilikayo kusebenzisa i-parallel resonance amandla okuvama amaphakathi supply, okuwukusetshenziswa kokuqala kwamandla kagesi wefrikhwensi emaphakathi e-China. Kuyidivayisi yokuguqula imvamisa eguqula amandla kagesi we-AC ezigaba ezintathu abe yisigaba esisodwa samandla kagesi aphakathi nendawo. Inzuzo yayo ukuthi inokuguquguquka okuqinile komthwalo futhi ingasetshenziswa njengokunikezwa kwamandla ukuchithwa kwesithando somlilo .

Umfanekiso 2-1 ubonisa umdwebo wesimiso wesekethe eyinhloko yokuphakelwa kwamandla kagesi aphakathi nendawo ahambisanayo, akhiwe ikakhulukazi i-isolation switch (DK), i-AC contactor (noma i-electric circuit breaker KM), i-inductance yolayini engenayo (L1 ~ L3) , ne-coupler esheshayo ( FU), i-rectifier (VT1 ~ VT6), i-smoothing reactor (LF), i-inverter (VT7 ~ VT10), i-parallel resonant load (L, C) . Isilungisisi siguqula imvamisa yamandla ezigaba ezintathu ibe yamanje eqondile; i-reactor ebushelelezi isetshenziselwa ukuhlunga i-ripple yamanje elungisiwe futhi ihlukanise ama-voltages ahlukene we-ripple phakathi kwesilungisisi nesishintshisi; i-inverter iguqula i-current eqondile ibe yi-single-phase intermediate frequency Alternating current; i-parallel resonant load eyakhiwe i-inductor kanye ne-capacitor yesinxephezelo ingakwazi ukuzivumelanisa kangcono nokuguqulwa kwezakhiwo zomthwalo ngesikhathi sokushisa.

Umfanekiso 2-1 Isekhethi enkulu yokuphakelwa kwamandla kagesi ehambisanayo

( 1) Isekethi yesilungisi elawulwa ngokugcwele enezigaba ezintathu Isekhethi yesilungisi ye-parallel resonant medium frequency power supply isebenzisa isekethe yesilungisi elawulwa ngokugcwele yezigaba ezintathu. Umgomo ukhonjiswe kuMfanekiso 2-2. Njengoba i-reactor eshelelayo (LF) ine-inductance enkulu futhi umthwalo ungumthwalo we-inductive, ukukhishwa kwamanje komthwalo we-rectifier kuyaqhubeka nomugqa oqondile. Uma i-aW60° , i-waveform ephumayo yesekethe yokubuyisela iyafana naleyo yomthwalo ophikisayo, futhi umthetho wokuqhuba uyafana nalowo womthwalo ophikisayo. Uma a>60 ° , ngenxa yomphumela we-inductor LF , i-thyristor isazovulwa ngemva kokuba amandla kagesi awela ku-zero, kuze kube yilapho i-thyristor elandelayo iculwa ukuba ivule, ukuze kuvele indawo engemihle ku-waveform ye i-voltage ephumayo yokubuyisela kabusha, kodwa amandla okukhiphayo okulungisayo kuseyileveli eyodwa

Intambo. Lapho i-engeli yokulawula ikhula ibe ngu-90. Uma izindawo ezinhle nezingezinhle ku-voltage waveform okukhiphayo zilingana, inani elimaphakathi le-voltage yokuphumayo Ud=0. Uma u->90° , isifunda sokubuyisela sisebenza esimweni sokusebenza se-inverter. Ububanzi bokushintsha kwesigaba sesekethe yokubuyisela amandla okunikezwa kwamandla okuvama okumaphakathi ngu-0°~150°.

(2) Isifunda se-inverter Umfanekiso we-2-3 umdwebo we-schematic we-parallel inverter circuit. I-capacitor C kumjikelezo womthwalo ixhunywe ngokuhambisana nekhoyili ye-inductor L, futhi ukuguqulwa kusekelwe kumgomo we-resonance parallel, ngakho-ke kubizwa ngokuthi i-parallel resonance inverter circuit. I-DC voltage Ud ehlinzekwa yisekethe ye-rectifier elawulwa ngokugcwele yi-thyristor ihlale ilungiseka, futhi isifunda se-inverter esihambisanayo siguqula amandla e-DC abe yimvamisa ephakathi nendawo kagesi we-AC emlayishweni. Intambo eseceleni ye-DC ine-LF inductance yokuhlunga enkulu, ngakho iyi-inverter yohlobo lwamanje. Ngenxa yokuthi imvamisa yokusebenza iphakeme kakhulu, ama-thyristors wezingalo zebhuloho ezi-4 zesekethe ye-inverter amukela ama-thyristors asheshayo. I-L7 ~ L10 i-inductance yokuguqulwa kwe-inverter thyristor, esetshenziselwa ukukhawulela izinga lamanje lokukhuphuka kwe-thyristor ngesikhathi sokuhamba.

Umfanekiso we-2-3 Umdwebo we-Schematic we-parallel inverter circuit