Daim ntawv thov ntawm Pulse Width Modulation Technology hauv Inverter Fais Fab
Lub hauv paus ntsiab lus ntawm inverter fais fab mov siv thyristor circuits los hloov tam sim no ncaj qha mus rau hauv alternating tam sim no, uas sib haum mus rau cov txheej txheem rov qab ntawm rectification thiab txhais tau tias yog inverter. Piv txwv li, nyob rau hauv ib qho hluav taws xob locomotive siv thyristors, thaum mus downhill, DC lub cev muaj zog yog siv los ua ib tug generator los nres thiab hloov lub locomotive lub peev xwm lub zog mus rau hauv hluav taws xob lub zog, uas yog ces xa rov qab mus rau AC zog daim phiaj. Piv txwv li, yog tias lub DC lub cev muaj zog yuav tsum nres sai sai, nws tuaj yeem ua haujlwm raws li lub tshuab hluav taws xob, hloov lub zog ntawm lub cev mus rau hauv lub zog hluav taws xob thiab xa rov qab mus rau daim phiaj hluav taws xob. Lub Circuit Court uas hloov tam sim no ncaj qha mus rau hauv alternating tam sim no hu ua inverter
Lub hauv paus ntsiab lus ntawm inverter fais fab mov
Cov txheej txheem thim rov qab ntawm kev hloov tam sim no ncaj qha rau hauv qhov hloov pauv tam sim no siv lub thyristor circuit, uas sib haum rau kev kho, txhais tau tias yog inversion. Piv txwv li, nyob rau hauv ib qho hluav taws xob locomotive siv thyristors, thaum mus downhill, DC lub cev muaj zog yog siv los ua ib tug generator los nres thiab hloov lub locomotive lub peev xwm lub zog mus rau hauv hluav taws xob lub zog, uas yog ces xa rov qab mus rau AC zog daim phiaj. Piv txwv li, yog tias lub DC lub cev muaj zog yuav tsum nres sai sai, nws tuaj yeem ua haujlwm raws li lub tshuab hluav taws xob, hloov lub zog ntawm lub cev mus rau hauv lub zog hluav taws xob thiab xa rov qab mus rau daim phiaj hluav taws xob. Lub Circuit Court uas hloov tam sim no ncaj qha mus rau hauv alternating tam sim no hu ua inverter circuit. Hauv cov xwm txheej tshwj xeeb, tib txheej ntawm thyristor converter circuits tuaj yeem siv rau ob qho tib si rectification thiab inversion. Thaum lub inverter ua hauj lwm nyob rau hauv lub inverter lub xeev, yog hais tias tus AC sab ntawm lub inverter yog txuas nrog AC Circuit Court, nws yog yooj yim, tab sis cov harmonic cov ntsiab lus ntawm cov zis voltage waveform yog siab dhau lawm, thiab THD (tam sim no harmonic distortion tus nqi) kuj siab dhau lawm; Lub harmonic cov ntsiab lus ntawm cov zis voltage waveform ntawm lub theem-hloov multi-overlap inverter fais fab mov yog me me, uas yog, lub THD yog me me, tab sis lub Circuit Court yog complex. Lub PWM pulse width modulation inverter fais fab mov, uas muaj ob lub computer circuits thiab tso zis voltage waveforms, tau dav siv.
Lub npe hu ua pWM pulse width modulation thev naus laus zis (pWM) yog qhov hloov pauv nthwv dej uas siv cov nthwv dej siv (feem ntau yog sine yoj, qee zaum muaj yoj trapezoidal lossis sine yoj lossis square nthwv dej txhaj nrog xoom sib luag sib luag) raws li kev hloov pauv yoj, thiab ib daim duab peb sab nthwv dej (tej zaum yog sawtooth yoj) nrog zaus N zaus ntawm kev hloov nthwv dej raws li tus neeg nqa khoom nthwv dej rau kev sib piv waveform. Nyob rau hauv qhov chaw uas lub modulation nthwv dej loj dua cov cab kuj nthwv dej, ib lub voj voos mem tes sib npaug nrog sib npaug amplitude thiab dav proportional rau lub modulation nthwv dej yog generated kom sib npaug rau modulation yoj. Cov analog kom muaj nuj nqis yog hloov los ntawm ib qho kev hloov pauv, thiab DC lub zog hloov pauv mus rau hauv cov neeg nqa khoom nthwv dej los ntawm kev tswj qhov qhib / tawm ntawm inverter fais fab hloov raj. AC fais fab tuag, lub tshuab no hu ua mem tes dav tswj inverter technology. Vim yog qhov sib txawv ntawm qhov sib txawv ntawm qhov amplitude ntawm cov cab kuj daim duab peb sab nthwv dej (lossis sawtooth yoj), lub tshuab no hu ua pulse width control inversion technology. Vim yog qhov sib txawv ntawm cov kab sib txawv ntawm qhov dav ntawm sab sauv thiab sab qis ntawm cov cab cab daim duab peb sab yoj (los yog sawtooth yoj), qhov kev hloov kho no kuj yog linear. Thaum lub modulation yoj yog ib tug sine yoj, lub mem tes dav ntawm cov zis rectangular mem tes theem hloov nyob rau hauv ib tug sinusoidal qauv. Cov txheej txheem kev hloov kho no feem ntau hu ua Sinusoidal Pulse Width Modulation (SPWM) thev naus laus zis.
