Izinhlelo zokusebenza zobuchwepheshe ze-Dc power PWM, izinzuzo kanye nemikhawulo

I-Pulse-width modulation iyindlela yokulawula isilinganiso sesikhathi samadivayisi ashintshwayo we-semiconductor ngokulungisa ububanzi be-pulse noma isikhathi ukuze ulawule i-voltage ephumayo. Ngenxa yokucindezelwa kwayo ngempumelelo kokuqoshwa kokudayela, ukusabela okuhle okuguquguqukayo, izinzuzo ezibalulekile zokuvama nokusebenza kahle, sekusetshenziswe kabanzi kuma-inverter kagesi, futhi ubuchwepheshe bayo buya ngokuya buthuthuka. Ubuchwepheshe bokulawula be-PWM busetshenziswa kabanzi kumjikelezo we-inverter, onethonya elikhulu kumjikelezo we-inverter. Njengamanje, isekethe ye-PWM inverter isetshenziswa ikakhulukazi kumasekethe amaningi e-inverter. Ngamafuphi, ungakwazi ukuzinzisa kalula i-voltage ephumayo.

Ngabe ubuchwepheshe be-PWM busebenza kanjani?

Ubuchwepheshe be-PWM buyindlela elawula i-voltage ephumayo ngokulungisa isikhathi sokuqhuba seswishi. Ubuchwepheshe be-PWM ngokuvamile bufinyelela ukushintsha kwamandla ngamasekhethi okulawula. Isifunda sokulawula silawula isikhathi sokushintsha ngokusekelwe kumehluko phakathi kwe-voltage ephumayo kanye ne-voltage enikeziwe ukuze kuzuzwe ithagethi ephumayo ezinzile.

Izinzuzo zobuchwepheshe be-PWM

1. I-voltage ephumayo ezinzile

Ubuchwepheshe be-PWM bulawula isikhathi sokuqhuba iswishi ukuze kuzuzwe ukulawula okunembile kwe-voltage ephumayo. Ubuchwepheshe be-PWM benza isilawuli se-voltage esiphumayo sizinze kunezindlela zokulungisa zomugqa zendabuko, kuthuthukisa ukuzinza nokuthembeka kwemodi yokushintsha amandla kagesi we-DC.

2. Ukwenza ngcono ukonga kwamandla

Ubuchwepheshe be-PWM bunciphisa ukulahleka kwamandla ngokuguqula i-voltage yokufaka ibe amasignali we-high-frequency pulse. Ngesikhathi esifanayo, ubuchwepheshe be-PWM bungalawula isikhathi sokuqhuba sokushintsha, ukunciphisa ukulahlekelwa kwesishintshi esimweni sezintambo, futhi ngaleyo ndlela kuthuthukise ukusebenza kahle kwamandla.

3. Qaphela ama-voltage amaningi okukhiphayo

Ngokulawula isikhathi sokuqhuba sokushintsha, ubuchwepheshe be-PWM bungafinyelela ububanzi obuningi bokukhipha amandla. Isibonelo, ezintweni zamandla ekhompyutha, ubuchwepheshe be-PWM bungafinyelela ama-voltage ahlukene okukhiphayo, afana no-12V, 5V, no-3.3V, ukuze kuhlangatshezwane nezidingo zemishini kagesi ehlukene.

4. Sebenzisa ukuvikela ukuphepha

Ubuchwepheshe bokushintshwa kwe-pulse ebanzi bulawula isikhathi sokuhola sokushintsha ukuze kuzuzwe ukuvikeleka kwamandla. Isibonelo, ezinsizeni zikagesi, ubuchwepheshe be-PWM bungavikela ukuphepha kwezinto zikagesi ngokulawula isikhathi sokushintshwa kweswishi nokunqamula ngokuzenzakalelayo ukunikezwa kwamandla lapho i-voltage iphezulu kakhulu noma iphansi kakhulu.

Imikhawulo yobuchwepheshe be-PWM

1. Umsindo ophezulu: Ubuchwepheshe be-PWM bukhiqiza amasignali we-high-frequency pulse, ajwayele ukuphazamiseka kazibuthe nomsindo, okuthinta ukusebenza okuvamile kwemishini kagesi.

2. Izindleko eziphezulu: Ubuchwepheshe be-PWM budinga amasekhethi okulawula akhethekile namaswishi, futhi kuyabiza.

3. Izidingo eziphezulu zokushintshwa: Ubuchwepheshe be-PWM budinga amaswishi anesivinini esikhulu. Amashubhu okushintsha isivinini anezidingo eziphezulu zokushintsha amashubhu.

Kafushane, ubuchwepheshe be-PWM bubuchwepheshe bokulawula obusetshenziswa kakhulu kumodi yokushintsha amandla kagesi we-DC. Inezinzuzo zokuzinza okuhle, ukusebenza kahle okuphezulu, nokuthembeka okuphezulu. Kodwa-ke, ubuchwepheshe be-PWM nabo bunemikhawulo yabo. Njengomsindo ophezulu, izindleko eziphezulu, kanye nezidingo eziphezulu zamashubhu okushintsha. Ngakho-ke, ukuze uhlangabezane nezidingo zemishini ye-elekthronikhi ekusetshenzisweni okungokoqobo, kuyadingeka ukukhetha ubuchwepheshe bokulawula obufanele ngokusekelwe ezimweni ezithile.