Welding tshuab feem ntau yog cais raws li qhov tam sim no (CC) lossis qhov tsis tu ncua (CV); lub tshuab tam sim no tsis tu ncua sib txawv ntawm nws cov zis hluav taws xob kom tswj tau qhov tam sim no tsis tu ncua thaum lub tshuab hluav taws xob tas li yuav hloov pauv nws cov zis tam sim no kom tswj tau qhov ntsuas hluav taws xob.Shielded hlau arc vuamthiabGas tungsten arc vuamyuav siv qhov chaw tam sim no thiabgas hlau arc vuamthiabflux-cored arc vuamFeem ntau siv cov khoom siv hluav taws xob tsis tu ncua tab sis qhov tam sim no tseem tuaj yeem ua tau nrog lub ntsuas hluav taws xob xaim xaim feeder.
Qhov xwm txheej ntawm lub tshuab CV yog xav tau los ntawm cov roj hlau arc vuam thiab flux-cored arc vuam vim tias cov vuam tsis muaj peev xwm tswj tau qhov ntev arc manually. Yog hais tias ib tug welder sim siv lub tshuab CV los welding nrog shielded hlau arc vuam qhov hloov me me nyob rau hauv arc nrug yuav ua rau dav fluctuations ntawm lub tshuab cov zis. Nrog lub tshuab CC lub welder tuaj yeem suav cov naj npawb ntawm cov amps mus txog cov khoom yuav tsum tau welded tsis hais lub arc nrug tab sis ntau dhau yuav ua rau vuam tsis zoo.
Hloov pauv
A transformer-style vuam fais fab mov converts lub nruab nrab voltage thiab nruab nrab tam sim no hluav taws xob los ntawm lubcov khoom siv hluav taws xob(feem ntau 230 lossis 115 VAC) rau hauv cov khoom siv hluav taws xob siab thiab tsis tshua muaj hluav taws xob, feem ntau ntawm 17 thiab 45 (qhib-circuit) volts thiab 55 txog 590amperes. A rectifierconverts AC rau DC ntawm cov tshuab kim dua.
Qhov kev tsim no feem ntau tso cai rau tus welder xaiv cov zis tam sim no los ntawm kev sib txawv txav lub hauv paus winding los ze zog los yog deb ntawm qhov sib nqus winding, txav ib qho sib nqus shunt hauv thiab tawm ntawm lub hauv paus ntawm lub transformer, siv cov txheej txheem saturating reactor nrog cov txheej txheem sib txawv saturating hauv series nrog cov zis theem nrab tam sim no, los yog tsuas yog tso cai rau tus welder xaiv cov zis voltage los ntawm ib txheej ntawm kais dej ntawm lub transformer thib ob winding. Cov tshuab transformer style no feem ntau yog qhov kim tshaj plaws.
Kev lag luam tawm rau cov nqi txo qis yog tias cov qauv tsim hluav taws xob ntshiab yog feem ntau loj thiab loj vim tias lawv ua haujlwm ntawm cov khoom siv hluav taws xob ntau zaus ntawm 50 lossis 60 Hz. Xws li tsawg zaus transformers yuav tsum muaj ib tug high magnetizing inductance kom tsis txhob nkim shunt tam sim no. Lub transformer kuj tseem muaj qhov tseem ceebdej inductancerauluv luvkev tiv thaiv nyob rau hauv cov kev tshwm sim ntawm ib tug vuam pas nrig ua daig rau lub workpiece. Cov xau inductance tuaj yeem hloov pauv kom tus neeg teb xov tooj tuaj yeem teeb tsa cov zis tam sim no.
Inverter
Txij li thaum lub advent ntawm high-power semiconductors xws li covinsulated rooj vag bipolar transistor (IGBT), tam sim no muaj peev xwm tsim tau ib qhoswitched-hom fais fab movmuaj peev xwm tiv nrog lub siab loads ntawm arc vuam. Cov qauv tsim no hu ua inverter vuam units. Lawv feem ntau ua ntej kho cov nqi hluav taws xob AC rau DC; Tom qab ntawd lawv hloov (invert) lub zog DC mus rau hauv ib qho kev hloov pauv hloov mus ua qhov xav tau vuam voltage lossis tam sim no. Qhov hloov zaus feem ntau yog 10 kHz lossis siab dua. Txawm hais tias qhov kev hloov pauv siab yuav tsum muaj cov khoom siv sib txawv thiab cov khoom siv hluav taws xob, nws ua rau txo qis ntawm cov kauj ruam hauv transformer, raws li qhov loj ntawm cov khoom sib nqus (transformers thiab inductors) uas yuav tsum tau ua kom tau raws li qhov muab hluav taws xob theem qis zuj zus raws li kev khiav hauj lwm (switching. ) zaus yog nce. Lub inverter circuitry tseem tuaj yeem muab cov yam ntxwv xws li kev tswj fais fab thiab kev tiv thaiv overload. Lub siab zaus inverter-raws li vuam tshuab feem ntau ua tau zoo dua thiab muab kev tswj xyuas zoo dua ntawm kev ua haujlwm tsis sib xws ntau dua li cov tshuab tsis-inverter vuam.
Lub IGBTs nyob rau hauv lub tshuab inverter raws li yog tswj los ntawm amicrocontroller, yog li cov yam ntxwv hluav taws xob ntawm lub vuam fais fab tuaj yeem hloov tau los ntawm software hauv lub sijhawm tiag tiag, txawm tias nyob rau ntawm lub voj voog los ntawm lub voj voog, tsis yog hloov maj mam dhau ntau pua yog tias tsis yog ntau txhiab lub voj voog. Feem ntau, tus tswj software yuav siv cov yam ntxwv xws li rub lub vuam tam sim no, muab qhov sib txawv ntawm qhov sib txawv thiab qhov ceev tam sim no los ntawm lub voj voog vuam, ua kom swept los yog nce qib sib txawv, thiab muab sij hawm raws li qhov xav tau rau kev siv qhov chaw tsis siv neeg vuam; Tag nrho cov yam ntxwv no yuav txwv tsis pub kim los tsim rau hauv lub tshuab hluav taws xob hloov pauv, tab sis tsuas yog xav tau qhov chaw nco qhov chaw hauv software tswj inverter tshuab. Ib yam li ntawd, nws muaj peev xwm ntxiv cov yam ntxwv tshiab rau lub tshuab software tswj inverter yog tias xav tau, los ntawm kev hloov kho software, es tsis yog los ntawm kev yuav ib lub welder niaj hnub.
