Ukusetyenziswa kwaMandla Ukuthelekiswa kweeSekethe ezahlukeneyo ezisetyenziswa kwiRhoqo yokuPhakathi (MF) yokuFudumeza iNkqubo yokuFudumeza indlela yokwenza

Ibhalwe ngu Mnu Zeng xiaolin ovela e-CHENGDU DUOLIN ELECTRIC CO., LTD

Eli nqaku lihlalutya izinto ezingalunganga zeNkqubo yokuFudumeza ye-SCR MF kunye nokwazisa uhlobo olutsha lweNkqubo yokuFudumeza ye-MF yokwenza izixhobo zamandla e-IGBT. Yiseti yeSekethe yokuHlanganisa enezinto ezibonakalayo ezonga umbane kwaye inokumiliselwa ngokulula nakweyiphi na imeko yomthwalo.

Okwangoku, uninzi lwabavelisi basebenzisa I-LC yokuHlola ngokuFanayo kunye ne-SCR njenge-inverter kwi-MF yabo Inkqubo yokuFudumeza Itekhnoloji ye-inverter ye-SCR yaphuhliswa kwangoko kwi-70s yenkulungwane edlulileyo. Nceda uboneDiagram 1!

. I-SCR LC yeSekethe yokuHlanganisa ngokuDibeneyo

Diagram 1

Kolu hlobo lwesekethe, ukuLungisa icandelo lenza imisebenzi emibini:

1. UTo Guqula i-AC yangoku ibeyi-DC yangoku ngama-SCRs amathandathu (isilayidi esilawulwa ngokutsha).

2. Ukuya lungisa amandla omatshini.

Ukungancedi kwesi setyhula:

1. Ukongeza Utyalomali kwi-Power Factor Compensitor Capacitor IKhabhinethi (I-PFCCC).

Uhlengahlengiso lwamandla lufezekiswa ngokulungelelanisa i-angle yokuqhuba ye-SCR, kwaye ukunciphisa i-angle yokuqhuba kuya kuthoba amandla ombane wegridi yamandla. Ke abasebenzisi kufuneka bathenge iKhabhinethi yeFactor Factor Compensation. Kwaye ke iindleko zonyukile.

2. Phantsi into yamandla

Into yamandla kuphela 0.8 ukuya 0.85 kwicandelo le-inverter ngenxa yokucima ipropathi ye-SCR.

3. Phezulu amandla ukusetyenziswa

l Emva kokulungiswa, ukucoca kwe-DC kwenziwa ngesixhobo esikhulu se-DC. Ngaloo ndlela1% -3% yelahleko yamandla yenziwe kweli candelo.

l Inverter yesekethe izalisekiswa zii-Thyristors ezine (i-SCR), ngoku ke 5% amandla ilahleko yenziwa kwicandelo le-inverter.

l Icandelo lokuphuma lijikeleze isekethe enesakhiwo esenziwe ngekhoyili yoqheliso kunye ne-capacitor. Inikwe umda ngokuqhekeka kwamandla ombane we-SCR, ukuphuma kwamandla ≤750V. I-oscillation yangoku kwi-coil yoqheliso ngu-Q (5 ukuya ku-10) amaxesha e-DC yangoku (i-Q yinto esemgangathweni yesekethe ye-resonant.). Ke ngoko kukho ilahleko enkulu yamandla kwiikhoyili yoqheliso. Ke ngokufana nokujikeleza kwesekethe, iukulahleka kwamandla malunga Iipesenti ezingama-25 ukuya kuma-30% yamandla oomatshini.

Tkungoko ukusebenza kwe-SCR MF yoQeqesho Hukutya Inkqubo imalunga nama-60% ukuya kuma-70%.

Ngokucacileyo, phakamisa umbane kwikhoyili yoqheliso kwaye unciphise ixabiso lesekethe ye-oscillation Q enokuthi iphucule ukusebenza komatshini. Kodwa kwisekethe efanayo yokuhlangana, zombini iziphelo zekhoyili yoqheliso enxibelelene ngqo ne-thyristor, ukuba inyusa i-voltage ye-coil ye-induction, i-voltage yokuphazamiseka kwee-thyristors kufuneka iphakanyiswe. Ke ngoko ukunyusa amandla ombane we-thyristors kuyonyusa iindleko zokuvelisa kodwa kunyanzeliswe ngumbane wokuphazamiseka kwethristristor.

I-Thyristor sisixhobo esilawulwa ngohlobo lwesiqingatha, xa ixabiso lesekethe le-oscillation Q <10, kulula ukumisa ukususwa okanye ukusilela kokukhululwa.

Abantu basebenzise inkqubo yokufudumeza i-SCR MF bayayazi inyani ukuba isikhululo sokufudumeza sigcwalise izinto ezibandayo; Kunzima ukuqala ukushiya. Ke ukuze kuphuculwe ukusebenza kweUqeqesho lwe-MF ukufudumeza inkqubo kufuneka ufune esinye isixhobo samandla kunye nenye isekethe: IGBT kunye I-LC Uthotho Izandi Isekethe. Nceda uboneUmzobo 2 ngezantsi!

. I-IGBT LCUthotho ISekethe eViweyo

—–isetyenziswe kwi Inkqubo ye-Duolin MF yokuFudumeza

Kwii-90s zokuqala, isixhobo esitsha samandla se-IGBT sazalwa naso Iimpawu ze amandla phezulu, ilahleko switch ephantsi kwaye phezulu iyasebenza Ubuninzi ukuya kuthi ga kwi-100 kHz. Itekhnoloji ye-IGBT ivuthiwe emva kweminyaka engama-20 yophuhliso, ngakumbi isizukulwana sesine se-IGBT esenziwe ngu-INFINEON. Umbane wayo wokugcwala ngu- 7 1.7 ngelixa i-Hard-switching frequency ifikelele kwi-20KHZ. I-IGBT ilawula ngokupheleleyo kumacandelo anjenge-inverter yamaxesha amaninzi, ukutshintsha umbane kunye nokufudumeza ubushushu.

DIgrafu 2

Kule sekethe, ukulungiswa kwenziwa ngokuthe ngqo zizi-diode ezintandathu (6) ngaphandle kokunqunqa ngenxa yoko kuncitshiswe ifuthe kumbane wombane wegridi. Kwicandelo lesekethe yokuphononongwa, umsebenzi wokuhluza wenziwa yi-capacitor C1 endaweni yesixhobo esikhulu kunye nesindayo sokufumana amandla okonga. I-SCR T1 apha isebenza njengotshintsho kuphela. Xa i-capacitor ihlawuliswa kumbane othile, i-SCR T1 idityanisiwe.

Icandelo le-Inverter liquka ii-IGBTs ezine (4). I-lahleko yokuqhuba ye-IGBT ilingana nee-SCR's kodwa ilahleko yokutshintsha kwe-IGBT ingaphantsi kunee-SCR ke ilahleko ye-inverter yangoku iphantsi, malunga ne-3%.

Zimbini iindlela zohlengahlengiso lwamandla: 1. ngokutshintsha ukusebenza kwecandelo le-inverter; 2. ngokutshintsha ixesha lokuqhutywa kwe-IGBT.

Icandelo lemveliso Series Isandi seCircuit eyenziwe yi-inductor (L) kunye ne-capacitor (C). Iimpawu zale sekethe kukuba i-IGBT yangoku ilingana neyangoku nge-inductor kunye ne-capacitor kodwa i-voltage kwi-inductor ngama-3-10 (Q amaxabiso) amaxesha ombane we-DC alungisiweyo. I-Voltage kwi-inductor (L) ibonelelwa ngokuthe ngqo yi-capacitor (C), ke akukho sidingo sokwenyuka kwamandla ombane wezixhobo zamandla (IGBT) xa uphakamisa amandla ombane kwi-inductor.

Amandla kwi-inductor P = V (ombane kwi-inductor) × I (ngoku nge-inductor) Ngoku makhe sithelekise ilahleko kwi-inductor phakathi Parallel kunye ne-Resonant Series isekethe. Thatha amandla kwi-inductor ngu-P.

Iisekethe eziHlanganisiweyo ezifanayo (prc): P = Vprc × mnaprc; P = 750 × mnaprc; Mnaprc= P / 750

Uluhlu lweSekethe yokuHlanganisa (src): P = Vsrc × mnasrc; P = 1500 × mnasrc; Mnasrc= P / 1500 (ubuncinci Vsrc = 3 × 500 DC iVolthi

Ngaloo ndlela mnasrc = 1/2 mna inyani; Siyazi ukuba ilahleko ye-inductor inxulumene kuphela nokumelana ne-inductor. Ukuxhathisa kucingelwa ukuba ngu-R, emva koko ilahleko yamandla yile:

P = Mna2R; Ipheinyani = Ndiinyani2R; Iphesrc = Ndisrc2 R = (1/2 mnainyani)2 R = 1/4 mnainyani2 R

Izibonelelo zale sekethe okanye i-Duolin's MF yokufudumeza inkqubo:

1. Phezulu ukusebenza ngokufanelekileyo

Ke ngoko phantsi kwemeko yamandla afanayo kunye ne-inductor efanayo, ilahleko ephezulu ye-Series Resonant inductor yikota (1/4) ye-Parallel Resonant inductor (Nceda ubone ifomula ngasentla!). Emva koko ilahleko yecandelo lokukhutshwa kwecandelo elimalunga ne-5% ukuya kwi-10% yamandla oomatshini, ke ukusebenza kakuhle kweNkqubo yokuFudumeza ye-MF esetyenzisiweyo yeeSekethe eziHlanganisiweyo zingama-80% - 90%.

2. Ukusetyenziswa kwamandla aphantsi

Kuluhlu lweSekethe yokuHlanganisa, ombane kwi-inductor ayihambelani nokuwa kwamandla ombane wesixhobo samandla. Ukude ukuba i-inductor insulation ivumelekile, ukunyusa i-voltage kwi-inductor kunokunciphisa ilahleko ye-inductor, ngakumbi ukuphucula ukusebenza komatshini. Umgaqo uyafana nokuhanjiswa kwamandla kwigridi kumandla ombane aphezulu.

Ke ngoko, xa uyila, khetha ixabiso elifanelekileyo le-Q elinokuqinisekisa ukuthembeka komatshini kunye nokuphucula ukusebenza komatshini, emva koko unokubaluleka kakhulu gcina amandla 10% -30% cUkuthelekiswa ne-thyristor yesiqhelo (i-SCR) yokufudumeza inkqubo.

3. Phezulu into yamandla

Ngokwesiqhelo iMF yoFudumezo lokuFudumeza ngeNkqubo ye-IGBT yeeSekethe eziHlanganisiweyo zinamandla amakhulu ngaphezulu kwe-0.95. Ukuba ukulungisa nge-12-pulse, amandla ombane anokufikelela kwi-0.98.

4. Kulula ukumilisela nakweyiphi na imeko yomthwalo

IGBT sisixhobo esilawulwa ngokupheleleyo. Ukucima / ukucima i-IGBT kulawulwa ngokuthe ngqo ngasesangweni ngaphandle kwayo nayiphi na into enxulumene namandla ombane kunye nexabiso le-Q lokujikeleza kwesekethe. Ke umatshini unokumiliselwa ngokulula kuyo nayiphi na imeko yomthwalo.

Ngapha koko, i-MF yoFudumezo lweNkqubo yokuFudumeza nge-IGBT Series Resonant Circuit lolona khetho lufanelekileyo kwiinkampani zokwenza.


Ixesha Post: Feb-04-2021