MOSFETs nyob rau hauv Electric Tsheb Controllers

1, lub luag hauj lwm ntawm MOSFET nyob rau hauv lub fais tsheb maub los

Hauv cov ntsiab lus yooj yim, lub cev muaj zog yog tsav los ntawm cov zis tam sim no ntawm lubMOSFET, qhov siab dua qhov tso zis tam sim no (kom tiv thaiv MOSFET los ntawm kev kub hnyiab tawm, tus maub los muaj kev tiv thaiv tam sim no), lub zog ntawm lub cev muaj zog, qhov nrawm dua.

2, tswj Circuit Court ntawm MOSFET lub xeev kev khiav hauj lwm

Qhib txheej txheem, ntawm lub xeev, tawm txheej txheem, txiav tawm lub xeev, tawg xeev.

Cov kev poob tseem ceeb ntawm MOSFET suav nrog kev hloov pauv (rau thiab tawm txheej txheem), kev poob qis, kev poob qis (ua los ntawm cov xau tam sim no, uas yog qhov tsis txaus ntseeg), avalanche lub zog poob. Yog tias cov kev poob no raug tswj nyob rau hauv qhov kev zam ntawm MOSFET, MOSFET yuav ua haujlwm kom zoo, yog tias nws dhau qhov kev zam, kev puas tsuaj yuav tshwm sim.

Qhov kev hloov pauv feem ntau ntau dua li lub xeev kev poob, tshwj xeeb tshaj yog PWM tsis qhib tag nrho, nyob rau hauv lub pulse width modulation state (suav nrog lub xeev pib acceleration ntawm lub tsheb fais fab), thiab lub xeev ceev tshaj plaws yog feem ntau cov conduction poob yog tswj hwm.

3, lub ntsiab ua rauMOSkev puas tsuaj

Overcurrent, siab tam sim no tshwm sim los ntawm kub kub puas tsuaj (sustained siab tam sim no thiab instantaneous siab tam sim no pulses tshwm sim los ntawm lub junction kub tshaj qhov kam rau ua tus nqi); overvoltage, qhov chaw-kua dej theem yog ntau dua li qhov tawg voltage thiab tawg; Lub rooj vag tawg, feem ntau vim tias lub rooj vag hluav taws xob raug puas tsuaj los ntawm sab nraud lossis tsav hluav taws xob ntau tshaj qhov siab tshaj qhov tso cai hluav taws xob (feem ntau yuav tsum muaj qhov hluav taws xob qhov rooj yuav tsum tsawg dua 20v), nrog rau kev puas tsuaj hluav taws xob zoo li qub.

4, MOSFET hloov txoj cai

MOSFET yog ib qho khoom siv hluav taws xob uas siv hluav taws xob, tsuav yog lub rooj vag G thiab lub hauv paus theem S kom muab qhov hluav taws xob tsim nyog ntawm theem S thiab D yuav tsim ib qho kev sib txuas ntawm qhov chaw theem. Qhov kev tawm tsam ntawm txoj kev tam sim no dhau los ua MOSFET sab hauv tsis kam, piv txwv li, ntawm-kuj. Qhov loj ntawm qhov kev tiv thaiv sab hauv no yeej txiav txim siab qhov siab tshaj plaws ntawm lub xeev tam sim no uasMOSFETnti tuaj yeem tiv taus (ntawm chav kawm, kuj muaj feem xyuam rau lwm yam, qhov tseem ceeb tshaj plaws yog thermal kuj). Qhov me dua qhov kev tiv thaiv sab hauv, qhov ntau dua qhov tam sim no.