Koj puas xav paub ntau ntxiv rau cov haujlwm ntawmBraking Resistornyob rau hauv lub zaus converter?
Yog tias muaj, thov xyuas cov ntaub ntawv hauv qab no.
Nyob rau hauv ib tug sib txawv zaus tsav system, lub cev muaj zog yog decelerated thiab nres los ntawm maj mam txo cov zaus.Thaum lub sij hawm ntawm kev txo zaus, lub synchronous ceev ntawm lub cev muaj zog txo, tab sis vim mechanical inertia, lub cev muaj zog rotor ceev tseem tsis hloov.Txij li thaum lub zog ntawm DC Circuit Court tsis tuaj yeem muab rov qab rau hauv kab sib chaws los ntawm tus choj rectifier, nws tsuas yog tso siab rau lub zaus hloov pauv (qhov zaus hloov pauv tau nqus ib feem ntawm lub zog los ntawm nws tus kheej capacitor).Txawm hais tias lwm cov khoom siv hluav taws xob, lub capacitor tseem muaj kev cuam tshuam rau lub sijhawm luv luv, tsim kom muaj "boost voltage" uas ua rau DC voltage.Tshaj dhau DC voltage tuaj yeem ua rau muaj kev puas tsuaj rau ntau yam khoom.
Yog li ntawd, thaum lub load yog nyob rau hauv lub generator braking xeev, tsim nyog ntsuas yuav tsum tau coj mus rau lub regenerative zog.Lub crane resistor nyob rau hauv Circuit Court feem ntau plays lub luag hauj lwm ntawm voltage divider thiab tam sim no shunt.Rau cov teeb liab, ob qho tib si AC thiab DC teeb liab tuaj yeem dhau los ntawm cov resistors.
Nws muaj ob txoj hauv kev los daws nrog lub zog regenerative:
1.Energy noj braking lag luam Lub zog noj braking yog ntxiv ib qho kev tawm tsam tiv thaiv ntawm DC sab ntawm qhov sib txawv zaus tsav kom dissipate lub regenerated hluav taws xob rau hauv lub hwj chim resistor rau braking.Qhov no yog ib txoj kev ntawm kev soj ntsuam nrog regenerative zog ncaj qha, raws li nws siv lub regenerative zog thiab converts nws mus rau hauv lub tshav kub zog los ntawm ib tug mob siab rau lub zog-siv braking circuit.Yog li ntawd, nws tseem hu ua "resistance braking", uas muaj lub braking unit thiab abraking resistor.Braking unit Lub luag haujlwm ntawm lub braking unit yog tig rau lub zog siv hluav taws xob thaum lub DC Circuit Court voltage Ud tshaj qhov kev txwv, kom DC Circuit Court tso tawm lub zog nyob rau hauv daim ntawv ntawm tshav kub los ntawm lub braking resistor.Ib qho resistor nrog qhov tsis sib xws yog hu ua tus resistor ruaj khov, thiab tus resistor nrog qhov sib txawv kuj yog hu ua potentiometer lossis qhov sib txawv resistor lossis Rheostat.
2.Braking units tuaj yeem muab faib ua hom built-in thiab sab nraud.Cov qub yog tsim rau cov tsis tshua muaj hluav taws xob feem ntau sib txawv zaus drives, thiab tom kawg yog tsim rau high-power variable zaus drives los yog tshwj xeeb braking yuav tsum.Hauv txoj cai, tsis muaj qhov sib txawv ntawm ob.Ob leeg yog siv los ua "switches" los txuas braking resistors, thiab yog tsim los ntawm lub hwj chim transistors, voltage sampling thiab kev sib piv circuits thiab tsav circuits.
Braking resistor ua hauj lwm raws li ib tug nruab nrab rau lub cev muaj zog regenerative zog kom dissipated nyob rau hauv daim ntawv ntawm tshav kub zog, thiab muaj xws li ob qho tseem ceeb tsis: kuj muaj nuj nqis thiab lub zog muaj peev xwm.Feem ntau siv hom hauv engineering xws li ripple resistors thiab txhuas (Al) alloy resistors.Cov yav tas siv cov ntsug corrugated nto los txhim kho cov cua sov dissipation, txo cov kab mob parasitic inductance, thiab siv cov txheej txheem siab thiab cov nplaim hluav taws-retardant inorganic txheej los tiv thaiv cov hlau tiv thaiv los ntawm kev laus thiab txuas ntxiv nws lub neej kev pab cuam.Cov yav tas cov huab cua tsis kam thiab kev co kuj yog zoo dua li cov tsoos ceramic core resistors, thiab nws yog dav siv nyob rau hauv hnyav industrial tswj ib puag ncig uas yuav tsum tau ntau dua.Lawv yooj yim rau nruab nruj nreem thiab tuaj yeem nruab nrog cov dab dej kub ntxiv (kom txo cov cua sov thaum lub sijhawm ua haujlwm ntawm lub cuab yeej), muab qhov zoo nkauj txaus nyiam.
