Sib tham txog lub ntsiab cai ntawm tsav DC tsav nrog Z cov chaw inverter
Z-Source Inverter (ZSI) yog DC-AC converter uas ua cov phaw thiab boost zog hauv ib theem xwb. Ib qho tshwj xeeb ntawm ZSI yog nws los ntawm lub xeev, nyob rau hauv uas ob lub keyboards ntawm tib choj yuav tsum muab rau tib lub sijhawm. Tsis muaj lub sij hawm tsim nyog yuav tsum tau, kev tso zis distortion raug txo kom tsawg, thiab tso zis ntau dua tuaj yeem tsis tau siv lub LC lim. ZSI ua rau lub tswv yim thiab kev txwv theoretical ntawm cov tshuaj nruab thiab tuaj yeem txhawb qhov DC input voltage tsis siv cov DC / DC boost converters lossis cov kauj ruam ntawm step-up. Hauv daim ntawv no, tus ZSI tsav tsheb nrog ntse random pulse dav tes taws los piav (RPWM) tswv yim rau lub tshuab tsis paub tseeb BLDC, uas hom phiaj los txhim kho cov kev ua tiav ntawm BLDC tsav tsheb.
ZSI ua tiav cov tswv yim thiab kev ua kom tsis pom kev thiab cov kev txwv ntawm cov tshuaj nruab thiab kuj tuaj yeem ua rau DC input qhov hluav taws xob tsis muaj kev pab los ntawm DC-DC boost converter los yog tshuab luam yeeb.
Kev ruaj khov magnet brushless DC (BLDC) yog siv ntau yam kev siv vim tias lawv ua tau zoo tshaj, muaj zog dua mus rau qhov siab, thiab txo tus nqi them. Lub cev ntawm lub zog BAPC trapezoidal electromotive force (EMF) yuav tsum tau muaj cov lus qhia txog rotor kom tus tsav tsav. Cov ntaub ntawv qhia txog qhov no yog feem ntau los ntawm peb cov kev siv cov nyhuv hauv cov teeb meem uas tsis yog kev tsav tsheb. Txawm li cas los xij, cov ntsuas qhov kub thiab txias tsis tsuas yog nce lub nqi ntawm lub cav, tab sis kuj yuav tsum tau kho tshwj xeeb txhua yam teeb meem.
Daim ntawv no aims los tshawb txog kev ua kom cov BLDC tsav tsheb khiav zoo licas. Rau qhov kawg no, ZSI tsav tswvyim npaj siab, uas siv cov ntse hauv siab plhaw dav tes taws los piav (RPWM) cov txheej txheem los tsav lub BLDC sensorless. Cov lus qhia yuav siv rov qab electromotive quab yuam (BEMF) rau qhov kev ntsuas kwv yees, thiab ZSI tsav yuav muab tau ntau yam kev tawm tsam qhov siab. Rau lub ZSI-BLDC tsav tsav, daim ntawv no tawm tswv yim ua qhov kev sib tw ob qho yooj yim ntawm boost boost pulse dav tes taws los piav (DTRSBPWM), uas tuaj yeem ua tiav hauv ob txoj kev nrog plaub pib nqa khoom.
Ob ntawm cov nqa khoom zoo li qub thiab tsis muaj zog ntau zaus, thiab qhov thib peb thiab plaub khoom muaj feem ntau tau hloov ntawm cov voos uas peb tau los ntawm chaotic zaus generator thiab nws cov inverter. DTRSBPWM harmonic fais fab kev tawm qauv zoo tshaj qhov ua tau yooj yim boost PWM (SBPWM). Cov kev tshawb xyuas simulation ntawm kev tsav tsheb tau ua ntawm MATLAB software thiab tau siv lub khoos kas SPARTAN-6 Field Programmable Gate Array (FPGA) (XC6SLX45). Tsab xov xwm no yuav tsom rau tag nrho kev sib haum xeeb ntawm kev sib raug zoo (THD) ntawm qhov hluav taws xob qhov hluav taws xob, Qhov kev siv tsheb npav DC, thiab kev sib haum xeeb (HSF).
Yuav ua li cas ZSI ua haujlwm
Z-qhov inverter yog DC-AC converter uas tuaj yeem ua tus phaw thiab boost zog ua ib theem xwb. ZSI ua tiav cov tswv yim thiab kev ua kom tsis pom kev thiab cov kev txwv ntawm cov tshuaj nruab thiab kuj tuaj yeem ua rau DC input qhov hluav taws xob tsis muaj kev pab los ntawm DC-DC boost converter los yog tshuab luam yeeb. Txoj haujlwm ua haujlwm ntawm ZSI muab faib ua plaub hom. Thawj hom yog cov kev ua haujlwm hauv lub xeev, qhov uas tus choj inverter ua raws li qhov chaw tam sim no rau DC txuas. Qhov thib ob hom yog qhov dhau los ntawm lub xeev hom, uas tus choj inverter ua haujlwm nyob rau hauv ib qho ntawm ob kab lus xoom vectors, dhau los ntawm lub siab thiab tsawg dua ntawm cov inverter. Qhov thib peb hom yog hom tsis yog los ntawm kev sib tw, qhov twg yog qhov inductor tam sim no pab txo cov harmonics ntawm txoj kab tam sim no. Qhov thib plaub hom yog cov xoom xeev, piv txwv li tus choj inverter ua haujlwm nyob hauv ib qho ntawm cov xoom xeev.
Yooj yim boost PWM
Txoj kev hloov khawm uas siv los ntawm ZSI yog qhov yooj yim boost PWM. Qhov no yog ib qho yooj yim, tsuas yog ob txoj kab ncaj nraim kom tswj tau hauv lub xeev. Thaum twg daim duab triangular waveform siab tshaj lub hnab ntawv VS lossis qis dua lub hnab ntawv VN, lub voj voog khiav haujlwm hauv lub xeev. Hauv lwm tus neeg mob, nws ua haujlwm zoo li PWM ib txwm coj. Thaum lub sij hawm yooj yim boost PWM, qhov kev ntxhov siab voltage generated ntawm tag nrho cov cuab yeej yog siab.
Kev tswj tsis tau ntawm ZSI-Fed BLDC tsav
ZSI qhov kev tswj xyuas tsis pom kev yog pom nyob hauv daim duab 1. Lub BLDC lub cev muaj peev xwm tswj tau los ntawm kev soj ntsuam xoom-lub caij nyoog ntawm lub sab EMF (ntawm qhov dav hlau voltage) thiab qhov tseeb qhov ceev nrawm thiab pub nws mus rau ZSI Circuit Court. Kev tswj lub zog ntawm kev tsav tsheb yog hnov los ntawm kev sib npaug ntawm kev sib npaug (PIC) thiab muab piv rau qhov kev txiav txim siab ntawm qhov kev txiav txim siab tswj.
