Ama-MOSFET ku-Electric Vehicle Controllers

1, indima ye-MOSFET kusilawuli semoto kagesi

Ngamagama alula, i-motor iqhutshwa amandla okukhipha amandlaI-MOSFET, ukuphakama kokukhishwa kwamanje (ukuze kuvinjwe i-MOSFET ekushiseni, isilawuli sinokuvikeleka komkhawulo wamanje), i-torque ye-motor inamandla, ukusheshisa kunamandla kakhulu.

 

2, umjikelezo wokulawula wesimo sokusebenza se-MOSFET

Inqubo evuliwe, kusimo, inqubo yokuvalwa, isimo sokunqanyulwa, isimo sokuhlukaniswa.

Ukulahlekelwa okuyinhloko kwe-MOSFET kufaka phakathi ukulahlekelwa kokushintsha (inqubo yokuvula nokuvala), ukulahlekelwa kokusebenza, ukulahlekelwa kwe-cutoff (okubangelwa ukuvuza kwamanje, okuyinto enganaki), ukulahlekelwa kwamandla e-avalanche. Uma lokhu kulahlekelwa kulawulwa ngaphakathi kwebanga elibekezelelekayo le-MOSFET, i-MOSFET izosebenza kahle, uma idlula ububanzi obubekezeleleka, umonakalo uzokwenzeka.

Ukulahlekelwa kokushintsha kuvame ukuba kukhulu kunokulahlekelwa kwesimo sokuqhuba, ikakhulukazi i-PWM ayivuliwe ngokugcwele, esimweni sokuguquguquka kobubanzi be-pulse (okuhambisana nesimo sokuqala sokusheshisa imoto kagesi), futhi isimo esisheshayo esiphezulu kuvame ukulahlekelwa kokuqhutshwa ukubuswa.

3, izimbangela eziyinhlokoMOSumonakalo

I-Overcurrent, i-high current ebangelwa ukulimala kwezinga lokushisa eliphezulu (ama-pulses amanje aphezulu aqhubekayo kanye nama-pulses amanje aphezulu abangelwa izinga lokushisa le-junction lidlula inani lokubekezelelana); i-overvoltage, izinga lokudonsa amanzi komthombo likhulu kune-voltage yokuwohloka nokuwohloka; ukuphuka kwesango, ngokuvamile ngenxa yokuthi i-voltage yesango ilinyazwa yisekethe yangaphandle noma yokushayela ngaphezu kwamandla kagesi aphezulu avumelekile (ngokuvamile adinga amandla kagesi wesango abe ngaphansi kuka-20v), kanye nokulimala kukagesi omile.

 

4, MOSFET ukushintsha isimiso

I-MOSFET iyidivayisi eshayelwa ugesi, inqobo nje uma isango G kanye nesiteji somthombo S ukunikeza amandla kagesi afanelekile phakathi kwesiteji somthombo S no-D kuzokwakha isekethe yokuqhuba phakathi kwesiteji somthombo. Ukumelana nale ndlela yamanje kuba ukumelana kwangaphakathi kwe-MOSFET, okungukuthi, ukumelana nokumelana. Ubukhulu balokhu kumelana kwangaphakathi bunquma ngokuyisisekelo ubukhulu obukhona besimo samanje ukuthi i-I-MOSFETI-chip ingamelana (yebo, ihlobene nezinye izici, okufaneleka kakhulu ukumelana nokushisa). Okuncane ukumelana kwangaphakathi, kukhulu okwamanje.