induction melting rauv ua hauj lwm hauv paus ntsiab lus – parallel resonance

zaus fais fab mov

Lub hwj chim mov ntawm lub induction melting rauv adopts parallel resonance nruab nrab zaus zog muab, uas yog qhov ntxov tshaj daim ntawv thov ntawm nruab nrab zaus fais fab mov hauv Suav teb. Nws yog ib tug zaus hloov dua siab tshiab ntaus ntawv uas converts peb-theem fais fab zaus zaus AC hluav taws xob hluav taws xob rau hauv ib-theem nruab nrab zaus hluav taws xob zog. Nws qhov zoo dua yog tias nws muaj zog load adaptability thiab tuaj yeem siv los ua lub zog rau induction melting rauv .

Daim duab 2-1 qhia txog lub hauv paus ntsiab lus ntawm lub ntsiab Circuit Court ntawm lub parallel resonant intermediate zaus fais fab mov, uas yog tsim los ntawm cais hloov (DK), AC contactor (los yog hluav taws xob Circuit Court breaker KM), cov kab inductance (L1 ~ L3) , thiab ceev coupler (FU), rectifier (VT1 ~ VT6), smoothing reactor (LF), inverter (VT7 ~ VT10), parallel resonant load (L, C). Lub rectifier converts peb-theem fais fab zaus alternating tam sim no mus rau tam sim no ncaj qha; lub smoothing reactor yog siv los lim cov rectified tam sim no ripple thiab cais txawv ripple voltages ntawm lub rectifier thiab lub inverter; lub inverter hloov cov tam sim no ncaj qha mus rau hauv ib theem nrab zaus Hloov tam sim no; qhov sib npaug resonant load tsim los ntawm ib qho inductor thiab cov nyiaj capacitor tuaj yeem hloov kho kom zoo dua rau kev hloov pauv ntawm cov khoom thauj thaum lub sijhawm cua sov.

Daim duab 2-1 Parallel resonance intermediate zaus fais fab mov lub ntsiab Circuit Court

(1) Peb-theem choj-hom tag nrho-tswj rectifier Circuit Court Lub rectifier Circuit Court ntawm lub parallel resonant intermediate zaus fais fab mov txais yuav peb-theem choj-hom tag nrho-tswj rectifier circuit. Txoj ntsiab cai muaj nyob rau hauv daim duab 2-2. Txij li thaum lub smoothing reactor (LF) muaj ib tug loj inductance thiab lub load yog ib tug inductive load, lub load tam sim no tso zis los ntawm lub rectifier yog nruam thiab ib tug ncaj kab. Thaum aW60 °, cov zis waveform ntawm lub rectifier Circuit Court yog tib yam li ntawm cov resistive load, thiab txoj cai conduction yog tib yam li cov resistive load. Thaum a> 60 °, vim qhov cuam tshuam ntawm inductor LF, lub thyristor tseem yuav tig rau tom qab lub hwj huam mov voltage hla xoom, kom txog rau thaum lub thyristor tom ntej no tau ua kom tig rau, kom qhov chaw tsis zoo tshwm nyob rau hauv lub waveform ntawm lub rectifier tso zis voltage, tab sis lub rectifier tso zis tam sim no tseem yog ib theem

Hlau. Thaum lub kaum sab xis tswj tau nce mus rau 90. Thaum qhov zoo thiab qhov tsis zoo nyob rau hauv cov zis voltage waveform yog sib npaug, qhov nruab nrab tus nqi ntawm cov zis voltage Ud = 0. Thaum ib tug> 90 °, lub rectifier Circuit Court ua hauj lwm nyob rau hauv lub active inverter ua hauj lwm lub xeev. Cov theem hloov pauv ntawm lub rectifier Circuit Court ntawm qhov nruab nrab zaus fais fab mov yog 0 ° ~ 150 °.

(2) Inverter circuit Daim duab 2-3 yog ib daim duab schematic ntawm lub parallel inverter circuit. Lub capacitor C nyob rau hauv lub load Circuit Court yog kev cob cog rua nyob rau hauv parallel nrog lub inductor coil L, thiab lub commutation yog raws li nyob rau hauv lub hauv paus ntsiab lus ntawm parallel resonance, yog li nws yog hu ua ib tug parallel resonance inverter Circuit Court. Lub DC voltage Ud muab los ntawm thyristor tag nrho-tswj rectifier Circuit Court yog txuas mus ntxiv, thiab lub parallel inverter Circuit Court inverts DC fais fab mov mus rau nruab nrab zaus AC fais fab mov rau lub load. DC sab hlua muaj lub lim loj inductance LF, yog li nws yog hom inverter tam sim no. Vim hais tias kev khiav hauj lwm zaus kuj yog siab, thyristors ntawm 4 choj caj npab ntawm lub inverter Circuit Court txais ceev thyristors. L7 ~ L10 yog commutation inductance ntawm inverter thyristor, uas yog siv los txwv qhov tam sim no nce tus nqi ntawm thyristor thaum commutation.

Daim duab 2-3 Schematic daim duab ntawm parallel inverter Circuit Court