Qhov tsawg-voltage universal zaus conversion tso zis voltage yog 380~650V, cov zis hwj chim yog 0.75 ~ 400kW, ua hauj lwm zaus yog 0 ~ 400Hz, thiab nws lub ntsiab Circuit Court txais AC-DC- AC Circuit Court. Nws txoj kev tswj hwm tau dhau los ntawm plaub tiam tom ntej.
Sine pulse width modulation (SPWM) tswj hom
Nws yog tus cwj pwm los ntawm kev tswj xyuas yooj yim Circuit Court qauv, tus nqi qis, thiab zoo mechanical hardness, uas tuaj yeem ua tau raws li cov kev cai ceev ceev ntawm kev sib kis thiab tau siv dav hauv ntau yam kev lag luam. Txawm li cas los xij, ntawm qhov tsawg zaus, vim qhov tsis tshua muaj qhov tso zis hluav taws xob, lub zog hluav taws xob cuam tshuam cuam tshuam los ntawm qhov hluav taws xob poob ntawm stator tsis kam, kom qhov siab tshaj plaws torque ntawm cov zis txo. Tsis tas li ntawd, nws cov yam ntxwv txhua yam tsis nyuaj li DC lub cev muaj zog tom qab tag nrho, dynamic torque muaj peev xwm thiab zoo li qub kev tswj hwm kev ua haujlwm tsis txaus siab, thiab kev ua haujlwm ntawm lub cev tsis siab, kev tswj nkhaus yuav hloov nrog kev hloov pauv, cov lus teb torque. qeeb, lub cev muaj zog torque siv tus nqi tsis siab, qhov kev ua tau zoo txo qis vim muaj cov stator tsis kam thiab inverter tuag cheeb tsam cuam tshuam ntawm qis ceev, thiab kev ruaj ntseg yuav tsis zoo. Yog li ntawd, tib neeg tau tsim vector tswj zaus hloov pauv ceev txoj cai.
Voltage Space Vector (SVPWM) tswj hom
Nws yog raws li lub hauv paus ntsiab lus ntawm tag nrho tiam nyhuv ntawm peb-theem waveform, thiab lub hom phiaj los kwv yees qhov zoo tagnrho ncig rotating magnetic teb trajectory ntawm lub cev muaj zog cua kis, tsim ib tug peb-theem modulated waveform nyob rau hauv ib lub sij hawm, thiab tswj nws los ntawm mus rau lub voj voog los ntawm ib tug inscribed polygon. Tom qab siv tswv yim, nws tau raug txhim kho, uas yog, zaus them nyiaj yog qhia, uas tuaj yeem tshem tawm qhov yuam kev ntawm kev tswj ceev; Qhov loj ntawm cov flux yog kwv yees los ntawm kev tawm tswv yim kom tshem tawm cov kev cuam tshuam ntawm stator tsis kam ntawm qhov nrawm. Cov zis voltage thiab tam sim no raug kaw kom txhim kho qhov tseeb thiab ruaj khov. Txawm li cas los xij, muaj ntau yam kev tswj xyuas kev sib txuas, thiab tsis muaj kev hloov kho torque tau qhia, yog li qhov kev ua haujlwm ntawm lub cev tsis tau txhim kho.
Vector tswj (VC) hom
Kev coj ua ntawm vector tswj kev hloov pauv ceev kev tswj hwm yog los hloov cov stator tam sim no Ia, Ib, Ic ntawm lub asynchronous lub cev muaj zog hauv peb theem kev tswj hwm, los ntawm kev hloov pauv peb-theem-ob-theem, sib npaug rau qhov hloov pauv tam sim no Ia1Ib1 hauv ob-theem nyob ruaj ruaj tswj system, thiab tom qab ntawd los ntawm rotor magnetic teb-taw qhia kev hloov pauv hloov pauv, sib npaug rau DC tam sim no Im1, It1 hauv synchronous rotation coordinate system (Im1 yog sib npaug rau qhov excitation tam sim no ntawm DC lub cev muaj zog; IT1 yog sib npaug. mus rau lub armature tam sim no proportional rau lub torque), thiab tom qab ntawd ua raws li txoj kev tswj ntawm DC lub cev muaj zog, nrhiav kev tswj kom muaj nuj nqis ntawm DC lub cev muaj zog, thiab paub txog kev tswj ntawm lub asynchronous lub cev muaj zog tom qab sib koom ua ke hloov pauv. Nws lub ntsiab yog kom sib npaug ntawm AC lub cev muaj zog raws li DC lub cev muaj zog, thiab tswj nws tus kheej ntawm ob yam ntawm kev nrawm thiab sib nqus. Los ntawm kev tswj cov rotor flux linkage, thiab tom qab ntawd decomposing lub stator tam sim no, ob lub ntsiab lus ntawm torque thiab magnetic teb tau txais, thiab lub quadrature los yog decoupling tswj yog paub los ntawm kev sib koom tes transformation. Lub tswv yim ntawm vector tswj txoj kev yog ntawm epoch-ua qhov tseem ceeb. Txawm li cas los xij, hauv kev siv tswv yim, vim hais tias lub rotor flux tsis yooj yim rau kev soj ntsuam kom raug, cov yam ntxwv ntawm lub cev muaj kev cuam tshuam zoo heev los ntawm lub cev muaj zog, thiab kev hloov pauv vector siv nyob rau hauv qhov sib npaug ntawm DC lub cev muaj zog tswj txheej txheem yog qhov nyuaj, uas ua rau nws nyuaj rau cov kev hloov pauv hloov. kev tswj xyuas tiag tiag kom ua tiav qhov kev soj ntsuam zoo tshaj plaws.
Direct torque tswj (DTC) txoj kev
Xyoo 1985, Xib Fwb DePenbrock ntawm Ruhr University hauv Tebchaws Yelemees thawj zaug tau tshaj tawm cov khoom siv hluav taws xob ncaj qha tswj kev hloov pauv hloov tshuab. Cov thev naus laus zis no daws qhov tsis txaus ntawm qhov kev tswj hwm vector saum toj no rau qhov loj, thiab tau tsim sai nrog cov tswv yim tswj hwm tshiab, cov qauv tsim kom meej thiab meej, thiab kev ua haujlwm zoo heev thiab zoo li qub. Cov thev naus laus zis no tau ua tiav siv rau lub zog siab AC tsav traction los ntawm hluav taws xob locomotives. Direct torque tswj ncaj qha txheeb xyuas tus qauv lej ntawm AC lub cev muaj zog nyob rau hauv stator tswj qhov system, thiab tswj cov flux thiab torque ntawm lub cev muaj zog. Nws tsis xav kom AC lub cev muaj zog sib npaug rau DC lub cev muaj zog, yog li tshem tawm ntau txoj kev suav hauv vector rotation transformation; Nws tsis tas yuav ua raws li kev tswj hwm ntawm DC lub cev muaj zog, thiab tsis tas yuav ua kom yooj yim rau cov qauv lej ntawm AC lub cev muaj zog rau kev txiav tawm.
Matrix AC-AC tswj hom
VVVF zaus hloov dua siab tshiab, vector tswj zaus hloov dua siab tshiab, thiab ncaj qha torque tswj zaus hloov dua siab tshiab yog tag nrho ib qho ntawm AC-DC-AC zaus hloov dua siab tshiab. Nws qhov tsis zoo yog qhov tsis zoo ntawm cov khoom siv hluav taws xob tsawg, kev sib haum xeeb loj tam sim no, lub zog loj cia lub peev xwm xav tau rau DC circuits, thiab lub zog hluav taws xob tsis tuaj yeem muab rov qab rau hauv daim phiaj, uas yog, plaub-quadrant ua haujlwm tsis tuaj yeem ua tiav. Vim li no, lub matrix alternating zaus tau los ua. Vim hais tias lub matrix AC-AC zaus hloov dua siab tshiab tshem tawm qhov nruab nrab DC txuas, yog li tshem tawm cov khoom loj thiab kim electrolytic capacitors. Nws tuaj yeem ua tiav lub zog ntawm l, cov khoom siv tam sim no ntawm sinusoidal thiab plaub-quadrant kev ua haujlwm, thiab lub zog loj ntawm lub cev. Txawm hais tias lub tshuab no tseem tsis tau paub tab, nws tseem nyiam ntau tus kws tshawb fawb los kawm txog qhov tob. Nws cov ntsiab lus tsis yog kev tswj tsis ncaj ntawm qhov tam sim no, kev sib txuas ntawm flux thiab cov nyiaj sib npaug, tab sis lub torque yog ncaj qha los ntawm kev tswj kom muaj nuj nqis. Nov yog li cas:
1. Tswj lub stator flux los qhia tus neeg saib xyuas stator flux kom paub txog qhov ntsuas tsis tau nrawm;
2. Kev txheeb xyuas tsis siv neeg (ID) tso siab rau cov qauv lej ntawm lub cev muaj zog kom tau txais kev txheeb xyuas lub cev muaj zog;
3. Xam tus nqi tiag tiag sib raug rau stator impedance, kev sib nrig sib inductance, magnetic saturation factor, inertia, thiab lwm yam, xam qhov tseeb torque, stator flux thiab rotor ceev rau kev tswj lub sijhawm;
4. Realize Band-Band tswj los tsim PWM teeb liab raws li Band-Band tswj ntawm flux thiab torque los tswj lub xeev hloov ntawm lub inverter.
Hom matrix AC-AC zaus muaj cov lus teb ceev ceev (<2ms), high speed accuracy (±2%, no PG feedback), and high torque accuracy (<+3%); At the same time, it also has high starting torque and high torque accuracy, especially at low speed (including 0 speed), it can output 150%~200% torque.