1. Lub hauv paus ntsiab lus ua haujlwm ntawm tag nrho-tswj inverter: Nws yog ib qho kev siv ib-theem tso zis tag nrho-bridge inverter lub ntsiab Circuit Court, thiab cov khoom siv AC siv IGBT hlab Q11, Q12, Q13, thiab Q14. Thiab los ntawm PWM mem tes dav hloov kho tswj IGBT raj rau lossis tawm.
Thaum lub inverter Circuit Court txuas nrog DC fais fab mov, Q11 thiab Q14 tau qhib ua ntej, thiab Q1 thiab Q13 raug tua, ces tam sim no yog tso tawm los ntawm tus ncej zoo ntawm DC fais fab mov, los ntawm Q11, L los yog thawj. kauj ntawm transformer, raws li qhia hauv daim duab 1-2, rau Q14. Rau qhov tsis zoo ncej ntawm lub hwj chim mov. Thaum Q11 thiab Q14 raug txiav tawm, Q12 thiab Q13 tau qhib, thiab tam sim no ntws los ntawm tus ncej zoo ntawm lub zog hluav taws xob los ntawm Q13 thiab inductance ntawm transformer thawj winding 2-1 rau Q12 rov qab mus rau qhov tsis zoo ncej ntawm lub zog mov. Thaum lub sij hawm no, nyob rau hauv thawj kauj ruam ntawm lub transformer, ib tug zoo thiab tsis zoo alternating square nthwv dej tau tsim. Siv high-frequency PWM tswj, ob khub ntawm IGBT raj yog alternating dua los tsim ib tug alternating voltage ntawm lub transformer. Vim lub luag hauj lwm ntawm LC AC lim, sine yoj AC voltage yog tsim ntawm cov zis.
Thaum Q11 thiab Q14 raug tua, txhawm rau tso tawm lub zog khaws cia, diodes D11 thiab D12 txuas nrog rau qhov sib npaug ntawm IGBT kom rov qab lub zog rau DC fais fab mov.
2. Ua hauj lwm hauv paus ntsiab lus ntawm semi-tswj inverter: semi-tswj inverter siv thyristor Cheebtsam. Th1 thiab Th2 yog thyristors uas ua haujlwm sib hloov. Yog tias Th1 tau pib ua ntej thiab qhib, qhov tam sim no ntws los ntawm Th1 los ntawm qhov hloov pauv. Nyob rau tib lub sijhawm, vim qhov induction ntawm transformer, lub commutation capacitor C yog them rau ob zaug ntawm lub hwj chim mov voltage. Nias Th2 yog ua kom tig rau, vim tias lub anode ntawm Th2 yog thim rov qab, Th1 raug tua thiab rov qab mus rau lub xeev thaiv. Nyob rau hauv txoj kev no, Th1 thiab Th2 commutate, thiab ces tus capacitor C yog them nyob rau hauv rov qab polarity. Nyob rau hauv txoj kev no, lub thyristor yog triggered alternately, thiab tam sim no alternately ntws mus rau lub hauv paus ntawm lub transformer, thiab alternating tam sim no tau txais nyob rau hauv lub thib ob ntawm lub transformer.
Hauv Circuit Court, qhov inductance L tuaj yeem txwv qhov tso tawm tam sim no ntawm kev sib hloov capacitor C, ncua lub sijhawm tso tawm, thiab xyuas kom meej tias lub sijhawm tig tawm ntawm lub voj voog ntau dua li lub sijhawm tig tawm ntawm lub thyristor, tsis tas yuav muaj qhov loj. - Muaj peev xwm capacitor. D1 thiab D2 yog ob lub tswv yim diodes, uas tuaj yeem tso tawm lub zog hauv inductance L thiab xa rov qab lub zog ntxiv hauv kev sib hloov rov qab mus rau lub hwj huam mov kom ua tiav lub zog tawm tswv yim ua haujlwm.
