Lapho uklama ugesi oshintshwayo noma isekethe ye-motor drive ene-mosfet, abantu abaningi bazocabangela ukumelana nokumelana kwe-mos transistor, i-voltage ephezulu, kanye nenani eliphezulu lamanje, kodwa yilokho kuphela abazokucabangela. Isifunda esinjalo singasebenza, kodwa akusona isifunda sekhwalithi ephezulu futhi asivunyelwe ukuklanywa njengomkhiqizo osemthethweni.
Isici esibaluleke kakhulu semosfetiyashintsha, ngakho-ke ingasetshenziswa kabanzi kumasekethe ahlukahlukene adinga ukushintshwa kwe-elekthronikhi, njengokushintshwa kwezinto zamandla kanye namasekethe okushayela kwezimoto. Namuhla, isimo sesifunda se-mosfet:
1, izinhlelo zokusebenza ze-voltage ephansi
Uma usebenzisa ugesi we-5V, uma kusetshenziswa isakhiwo se-totem pole yendabuko, ngenxa yokwehla kwe-voltage ye-transistor ibe yi-0.7V kuphela, i-voltage yangempela elayishwe esangweni ingu-4.3V kuphela, ngalesi sikhathi, uma sikhetha. i-mosfet ene-voltage engu-4.5V, isifunda sonke sizoba nengozi ethile. Inkinga efanayo izokwenzeka uma usebenzisa i-3V noma enye i-low-voltage power supply.
2, izinhlelo zokusebenza ze-voltage ebanzi
Ekuphileni kwethu kwansuku zonke, i-voltage esiyifakayo ayilona inani elinqunyiwe, izothinteka isikhathi noma ezinye izici. Lo mphumela uzodala ukuthi isekethe ye-pwm inikeze i-voltage yokushayela engazinzile ku-mosfet. Ngakho-ke ukuze uvumele ama-mos transistors ukuthi asebenze ngokuphepha kuma-voltage aphezulu wamasango, amaningiama-mosfetsnamuhla banezilawuli ze-voltage ezakhelwe ngaphakathi ezikhawulela i-voltage yesango. Kuleli qophelo, lapho i-voltage yedrayivu enikeziwe idlula i-voltage yesilawuli, inani elibalulekile lokusetshenziswa kwamandla amile kwenzeka. Ngesikhathi esifanayo, uma i-voltage yesango imane incishiswe kusetshenziswa isimiso se-resistor voltage divider, i-voltage yokufaka izoba phezulu futhi i-mosfet izosebenza kahle. Lapho i-voltage yokufaka incishisiwe, i-voltage yesango ayanele, okuholela ekuqhubeni okungaphelele kanye nokwanda kokusetshenziswa kwamandla.
Isikhathi sokuthumela: Jul-04-2024
