Nyob rau hauv ib tug series ntawm resistors, capacitor, thiab inductors, qhov tshwm sim ntawm lub hwj chim, voltage, tam sim no, thiab theem tshwm sim yog hu ua.series resonance. Nws cov yam ntxwv yog: ib tug ntshiab kuj Circuit Court, qhov twg lub hwj chim, voltage, thiab tam sim no muaj theem, reactance X yog sib npaug zos rau xoom, impedance Z yog sib npaug zos rau R, thiab qhov tsawg kawg nkaus impedance, tam sim no, siab tshaj inductance, thiab capacitance ntawm Circuit Court yuav tsim voltages ntau zaus ntau dua li lub hwj chim mov voltage thiab high voltage. Yog li ntawd, series resonance tseem hu ua voltage resonance.
Lub resonance voltage yog superimposed nrog tus thawj voltage, thiab parallel resonance: nyob rau hauv ib tug parallel Circuit Court, resistors, capacitors, thiab inductors qhia ib theem phenomenon ntawm lub voltage thiab tag nrho cov tam sim no ntawm lub Circuit Court, uas yog hu ua parallel resonance. Nws tus yam ntxwv yog tias thaum uas tig mus resonance yog ib tug tag nrho compensated txoj kev uas tsis yuav tsum tau reactive hwj chim, tab sis tsuas yog muab lub hwj chim xav tau los ntawm lub active hwj chim resistor, generating resonance kom txo tau tag nrho cov tam sim no ntawm lub Circuit Court, thiab ceg tam sim no feem ntau yog ntau tshaj tag nrho cov tam sim no nyob rau hauv lub Circuit Court. Yog li ntawd, parallel resonance tseem hu ua tam sim no resonance.
Cov yam ntxwv thiab qhov sib txawv ntawm series resonance thiab parallel resonance:
1. Lub load resonance hom yuav muab faib ua ob hom: parallel inverter thiab series inverter. Cov yam ntxwv tseem ceeb thiab qhov sib txawv ntawm series inverter thiab parallel inverter yog raws li hauv qab no:
Qhov txawv ntawm series inverters thiab parallel inverters nyob rau hauv qhov sib txawv oscillation circuits lawv siv, nrog rau yav dhau los nyob rau hauv series nrog L, R, thiab C thiab tom kawg nyob rau hauv parallel nrog L, R, thiab C.
(1) Lub load Circuit Court ntawm lub series inverter muaj tsawg impedance rau lub hwj chim mov thiab yuav tsum tau powered los ntawm ib tug voltage qhov chaw. Yog li ntawd, lub rectified thiab lim DC fais fab mov davhlau ya nyob twg yuav tsum tau txuas mus rau ib tug loj filtering capacitor. Thaum lub inverter malfunctions, muaj ib tug loj surge tam sim no, ua rau kev tiv thaiv nyuaj.
Lub load Circuit Court ntawm ib tug parallel inverter nthuav qhia siab impedance rau lub hwj chim mov thiab yuav tsum tau ib tug tam sim no qhov chaw los muab nws. Txawm li cas los xij, nyob rau hauv qhov kev tshwm sim ntawm inverter tsis ua hauj lwm, qhov tam sim no yuav raug txwv los ntawm siab reactance, uas muaj kev cuam tshuam me me thiab yooj yim los tiv thaiv.
(2) Lub input voltage ntawm ib tug series inverter yog tas li, thiab cov zis voltage yog ib lub voj voos. Cov zis tam sim no yog kwv yees li sine yoj, thiab lub converter ib txwm coj lub kaum sab xis voltage tom qab thyristor tam sim no yog xoom.
Lub input tam sim no ntawm ib tug parallel inverter yog tas mus li, qhov tso zis voltage yog kwv yees li ib sine yoj, thiab cov zis tam sim no yog ib lub voj voog. Ua ntej lub resonant capacitor voltage hla xoom, lub load tam sim no ntawm lub converter yog ib txwm nyob rau hauv pem hauv ntej ntawm lub kaum sab xis voltage. Hauv lwm lo lus, ob qho tib si ua haujlwm nyob rau hauv cov khoom siv hluav taws xob.
(3) A series inverter yog ib qho khoom siv hluav taws xob tas li. Txhawm rau kom tsis txhob muaj kev sib xyaw ua ke ntawm thyristors nyob rau sab sauv thiab sab caj npab ntawm lub inverter, uas yuav ua rau muaj kev cuam tshuam luv luv hauv inverter fais fab mov, nws yog ib qho tsim nyog yuav tsum xyuas kom meej tias nws raug tua ua ntej thiab tom qab ntawd qhib. Qhov ntawd yog hais tias, tag nrho cov thyristors (lwm cov khoom siv hluav taws xob hluav taws xob) yuav tsum tau muab tua rau lub sijhawm (t). Stray inductance, uas yog hais txog qhov ua rau muaj peev xwm tsim los ntawm inductance los ntawm DC lub davhlau ya nyob twg mus rau cov khoom siv lead ua, yuav ua rau cov khoom puas tsuaj, yog li nws yuav tsum xaiv qhov tsim nyog surge voltage absorption circuit rau cov khoom siv. Tsis tas li ntawd, txhawm rau xyuas kom meej tias cov khoom thauj tam sim no tsis tu ncua thiab thyristor tsis cuam tshuam los ntawm qhov hluav taws xob siab ntawm lub converter capacitor thaum lub sij hawm thyristor tig tawm lub sij hawm, yuav tsum muaj anti parallel ceev diode ntawm ob kawg ntawm thyristor.
Parallel inverter yog qhov khoom siv hluav taws xob tas li. Txhawm rau kom tsis txhob muaj qhov cuam tshuam loj uas tsim los ntawm cov lim dej reactance Ld, qhov tam sim no yuav tsum tau txuas mus ntxiv. Hauv lwm lo lus, nws yog ib qho tsim nyog los xyuas kom meej tias cov thyristors nyob rau sab sauv thiab sab choj caj npab ntawm lub inverter yog thawj zaug qhib thiab tom qab ntawd tawm thaum lub sij hawm hloov pauv, uas yog, tag nrho cov thyristors nyob rau hauv ib qho kev coj ua thaum lub sij hawm converter (t) lub sij hawm. Ntawm no, txawm hais tias lub inverter choj caj npab yog txuas ncaj qha, Ld yog qhov loj txaus kom tsis txhob ua rau luv luv hauv DC fais fab mov. Txawm li cas los xij, lub sijhawm ua haujlwm ntev yuav txo qhov kev ua haujlwm ntawm lub cev, yog li nws yuav tsum ua kom luv luv t-gamma, uas yog, txo tus nqi ntawm Lk.
(4) Kev khiav hauj lwm zaus ntawm series inverter yuav tsum qis dua lub ntuj oscillation zaus ntawm load Circuit Court, uas yog, los xyuas kom meej lub sij hawm tsim nyog. Txwv tsis pub, vim yog qhov ncaj qha kev sib txuas ntawm sab sauv thiab sab qis, lub inverter yuav ua haujlwm tsis zoo. Tus choj caj npab ntawm lub inverter.
Kev khiav hauj lwm zaus ntawm ib qho hluav taws xob sib txuas yuav tsum siab me ntsis siab dua li lub ntuj oscillation zaus ntawm cov khoom siv hluav taws xob kom ntseeg tau tias muaj qhov tsim nyog rov qab voltage lub sij hawm t, txwv tsis pub nws yuav ua rau muaj teeb meem hauv thyristor converter. Txawm li cas los xij, yog tias nws siab dhau lawm, qhov rov qab voltage ntawm thyristor thaum lub converter yuav siab dhau, uas tsis tso cai.
(5) Muaj ob txoj kev tswj hwm lub zog rau series inverters: hloov DC fais fab mov voltage Ud los yog hloov lub thyristor trigger zaus, uas yog, hloov lub load hwj chim factor cos.
Txoj cai tswj fais fab ntawm qhov sib npaug ntawm cov inverters tuaj yeem hloov pauv DC fais fab mov voltage Ud, thiab hloov cos phi kuj tseem yuav ua rau cov zis hluav taws xob thiab lub zog ntawm lub inverter, tab sis qhov kev tso cai hloov ntau yam tsawg heev.
(6) Nyob rau hauv lub converter ntawm series inverter, lub thyristor ib txwm muab tua. Ua ntej tig tawm, tam sim no maj mam txo mus rau xoom, yog li lub sijhawm tig tawm yog luv luv thiab qhov poob me me. Thaum lub sijhawm sib hloov, lub thyristor muaj lub sijhawm tig tawm ntev dua (t + t -).
Nyob rau hauv lub converter ntawm ib tug parallel inverter, lub thyristor raug yuam kom tua thaum lub sij hawm tag nrho cov hauj lwm tam sim no. Tom qab qhov tam sim no raug yuam kom poob mus rau xoom, yuav tsum muaj lub sijhawm rov qab voltage lub sijhawm, yog li lub sijhawm tig tawm yog ntev dua. Nyob rau hauv sib piv, series inverters yog ntau haum rau induction cua sov khoom nrog ntau dua kev khiav hauj lwm zaus.
(7) Lub thyristors ntawm series inverter yuav tsum tiv taus qis voltages. Thaum siv 380V daim phiaj fais fab rau lub zog, 1200V thyristors yuav tsum tau siv. Txawm li cas los xij, tag nrho cov tam sim no hauv lub voj voog, suav nrog cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, yuav tsum ntws los ntawm thyristor. Yog tias lub inverter thyristor poob nws cov mem tes, nws tsuas yog nres lub oscillation thiab yuav tsis ua rau lub inverter tig.
Lub rooj vag siv lead ua ntawm ib qho kev sib txuas ntawm lub inverter yuav tsum tau tiv taus qhov hluav taws xob siab, thiab nws cov nqi nce nrawm nrog qhov nce ntawm lub hwj chim ntawm lub kaum sab xis. Txawm li cas los, lub load nws tus kheej yuav tsim ib tug oscillating tam sim no voj. Tsuas yog cov khoom siv tam sim no ntws los ntawm inverter thyristor, thiab thaum lub inverter thyristor qee zaus poob lub cim mem tes, nws tseem tuaj yeem tswj tau oscillation thiab ua haujlwm ruaj khov.
(8) Series inverters tuaj yeem ua rau tus kheej -zoo siab lossis tus kheej-zoo siab. Cov zis hluav taws xob tuaj yeem hloov kho los ntawm kev hloov pauv lub cim mem tes zaus ntawm lub inverter. Parallel inverters tuaj yeem ua haujlwm tsuas yog hauv lub xeev tus kheej zoo siab.
(9) Nyob rau hauv ib tug series inverter, lub trigger mem tes ntawm lub thyristor yog asymmetric thiab tsis qhia DC tivthaiv tam sim no los cuam tshuam rau ib txwm ua hauj lwm. Txawm li cas los xij, nyob rau hauv parallel inverters, lub impulse impulse ntawm lub inverter thyristor yog asymmetric, uas tuaj yeem qhia DC tivthaiv tam sim no thiab ua rau muaj kev txhaum.
(10) Lub series zaus converter yog ib qho yooj yim pib thiab haum rau nquag pib ua hauj lwm ib puag ncig; Parallel inverters xav tau kev pib circuits ntxiv, uas nyuaj rau pib.
(11) Vim yog lub voj voos yoj hluav taws xob uas tau los ntawm thyristors hauv cov inverter series, du / dt tus nqi yog qhov loj, thiab qhov nqus hluav taws xob ua lub luag haujlwm tseem ceeb, thaum qhov kev xav tau ntawm di / dt yog qhov tsawg. Nyob rau hauv parallel inverters, qhov tam sim no ntws los ntawm lub inverter thyristors yog ib lub voj voos, yog li yuav tsum muaj qhov loj dua di / dt thiab qis dua du / dt.
(12) Thaum qhov kev ncua deb ntawm induction cua sov kauj ntawm series inverter thiab lub zog inverter (xws li channel capacitors) nyob deb, qhov cuam tshuam ntawm cov zis hluav taws xob yog me me. Yog tias siv cov coaxial cables los yog cov kav hlau txuas tau muab tso rau ze li sai tau (zoo dua twisted ua ke), cov nyhuv tsis tseem ceeb. Rau kev sib txuas inverters, cov cua kub induction cua sov yuav tsum tau muab tso rau ze li sai tau rau lub zog hluav taws xob (tshwj xeeb tshaj yog cov channel capacitor), txwv tsis pub nws yuav ua rau txo qis zog thiab ua haujlwm zoo.
(13) Qhov voltage ntawm induction kauj ntawm series inverter thiab qhov voltage ntawm qhov sib txawv capacitor yog ob qho tib si Q lub sij hawm cov zis voltage ntawm lub inverter, thiab tam sim no ntws los ntawm induction kauj yog sib npaug zos rau cov zis tam sim no ntawm lub inverter.
Qhov voltage ntawm lub induction kauj thiab qhov sib txawv capacitor ntawm ib qho kev sib txuas ntawm lub inverter yog sib npaug rau cov zis hluav taws xob ntawm lub inverter, thiab qhov tam sim no ntws los ntawm lawv yog Q lub sij hawm cov zis tam sim no ntawm lub inverter.
Nyob rau hauv cov ntsiab lus, parallel inverters thiab series inverters (feem ntau hu ua parallel lossis series inverter fais fab mov) muaj lawv tus kheej cov yam ntxwv thiab daim ntawv thov teb. Los ntawm qhov kev xav ntawm kev lag luam cua sov siv, kev sib txuas inverters tau dav siv hauv smelting, rwb thaiv tsev, hloov hluav taws xob, induction cua sov thiab lwm yam kev lag luam, nrog rau lub zog ntau los ntawm ob peb kilowatts mus txog kaum txhiab kilowatts. Series inverters yog dav siv nyob rau hauv rwb thaiv tsev thiab siab Q tus nqi thiab siab - zaus induction cua sov daim ntaub ntawv nyob rau hauv smelting, ib tug mus rau ob lub rauv, nrog ib tug ntau yam ntawm lub hwj chim ntawm ob peb kilowatts mus rau ntau txhiab kilowatts. Tam sim no, ntau dua 90% ntawm cov khoom siv hluav taws xob sib txawv siv nyob rau hauv Tuam Tshoj txoj kev lag luam yog cov khoom siv hluav taws xob sib txawv sib txawv.