Yuav ua li cas kom txo tau lub internal poob ntawm switching fais fab mov
Lub ntsiab poob nyob rau hauv lub switching fais fab mov los txhim kho efficiency ntawm lub switching fais fab mov, nws yog ib qhov tsim nyog yuav tau paub qhov txawv thiab roughly kwv yees ntau yam poob. Losses nyob rau hauv ib tug switching fais fab mov yuav roughly muab faib ua plaub qhov chaw: switching losses, conduction losses, ntxiv losses, thiab kuj poob. Cov kev poob no feem ntau tshwm sim ib txhij hauv cov khoom poob thiab tau tham sib cais hauv qab no.
Losses cuam tshuam nrog lub zog hloov
Lub zog hloov hluav taws xob yog ib qho ntawm ob qhov tseem ceeb tshaj plaws ntawm kev poob hauv ib qho kev hloov pauv hluav taws xob. Losses tuaj yeem faib ua ob ntu: kev poob qis thiab hloov pauv. Kev poob qis yog thaum lub tshuab hluav taws xob tau raug qhib, thiab tsav thiab hloov cov qauv hloov pauv tau ruaj khov tom qab lub zog hloov pauv hauv lub xeev poob; switching poob tshwm sim thaum lub hwj chim hloov tau tsav mus rau hauv lub xeev kev khiav hauj lwm tshiab, tsav thiab hloov waveforms yog nyob rau hauv txoj kev hloov pauv poob.
Txoj kev zoo ntawm kev tswj qhov kev poob no yog kom txo qis qhov hluav taws xob poob thaum lub zog hloov hluav taws xob. Yuav kom ua tiav qhov no, tus tsim qauv yuav tsum ua haujlwm ntawm qhov hloov pauv hauv saturation. Cov xwm txheej no tau muab los ntawm kev sib npaug (2a) thiab (2b) thiab tau tsav los ntawm lub hauv paus lossis lub rooj vag overcurrent, kom ntseeg tau tias cov khoom siv los yog cov dej ntws tawm yog tswj los ntawm cov khoom siv sab nraud es tsis yog los ntawm lub hwj chim hloov nws tus kheej.
Hloov kev poob thaum lub zog hloov pauv hloov pauv ntau dua, ob qho tib si los ntawm lawv tus kheej thiab los ntawm cov khoom koom nrog. Kev poob-txog waveforms tsuas yog ntsuas tau los ntawm Lub waveforms cuam tshuam nrog qhov poob tsuas yog tuaj yeem pom los ntawm oscilloscope nrog lub ntsuas hluav taws xob txuas nrog qhov ntws-qhov chaw (collector) kawg, thiab AC tam sim no sojntsuam tuaj yeem ntsuas qhov ntws lossis cov khoom siv tam sim no. Kev ntsuas qhov poob ntawm txhua qhov kev hloov tam sim Thaum ntsuas qhov poob ntawm txhua qhov kev hloov pauv tam sim, nws yog ib qho tseem ceeb uas yuav tsum tau siv cov hlau lead luv luv nrog cov ntaub thaiv npog, vim tias cov hlau lead uas tsis muaj kev tiv thaiv ntawm txhua qhov ntev yuav ua rau lub suab nrov los ntawm lwm qhov chaw siv hluav taws xob thiab yog li tsis raug tso tawm kom pom. muaj tseeb waveform. qhia qhov tseeb waveform. Thaum ib tug zoo waveform tau lawm, cheeb tsam uas nyob rau hauv ob lub nkhaus yuav roughly xam los ntawm tej yam yooj yim summation ntawm lub triangular thiab rectangular segments. thaj chaw ncig los ntawm ob lub nkhaus.
