Waxaa jira laba xal oo waaweyn:
Mid waa in la isticmaalo chip darawalka u go'an in lagu wado MOSFET, ama isticmaalka sawir-qaadayaasha degdega ah, transistor-yadu waxay ka kooban yihiin wareegyo lagu wado MOSFET, laakiin nooca ugu horreeya ee habka wuxuu u baahan yahay bixinta koronto madaxbannaan; Nooca kale ee Transformer-ka garaaca wadnaha si uu u wado MOSFET, iyo wareegga wadida garaaca wadnaha, sida loo hagaajiyo inta jeer ee wareegga wareegga wareegga si loo kordhiyo awoodda wadista, inta suurtogalka ah, si loo yareeyo tirada qaybaha, waa baahida degdegga ah. si loo xalliyoDhibaatooyinka hadda jira.
Nooca ugu horreeya ee nidaamka wadista, buundada badhkeed waxay u baahan tahay laba sahay koronto oo madaxbannaan; Buundada buuxa waxay u baahan tahay saddex sahay koronto oo madaxbannaan, labadaba buundada nuska ah iyo buundada buuxa, qaybo aad u badan, oo aan ku habboonayn dhimista kharashka.
Nooca labaad ee barnaamijka wadista, iyo patent-ku waa farshaxanka hore ee ugu dhow ee magaca hal-abuurka "awood sare lehMOSFET wadista wareegga" patent (lambarka codsiga 200720309534. 8), patent-ku kaliya wuxuu ku daraa caabbinta dareeraha si loo sii daayo isha iridda ee awoodda MOSFET ee awoodda sare leh, si loo gaaro ujeedada xiritaanka, cidhifka soo dhacaya ee calaamadda PWM waa weyn. cidhifka soo dhacaya ee calaamada PWM waa weyn tahay, taas oo u horseedi doonta in si tartiib ah loo xiro MOSFET, lumista korontadu aad bay u weyn tahay;
Intaa waxaa dheer, barnaamijka patent MOSFET shaqada ayaa u nugul faragelinta, iyo chip-ka kontoroolka PWM wuxuu u baahan yahay inuu yeesho awood weyn oo wax soo saar ah, samaynta heerkulka chip-ku waa sarreeyaa, saameynaya nolosha adeegga chip-ka. Nuxurka ikhtiraacida Ujeeddada qaabkan utility waa in la bixiyo wareegga wadista MOSFET awood sare leh, ka shaqeyso xasillooni iyo eber si loo gaaro ujeedada qaabkan utility xal farsamo - a MOSFET wadista awoodda sare, wax soo saarka signalada Chip-ka kontoroolka PWM wuxuu ku xiran yahay beddelka garaaca wadnaha aasaasiga ah, ee wax soo saarka ugu horreeya of Transformer-ka labaad wuxuu ku xiran yahay albaabka MOSFET ee ugu horreeya, wax soo saarka labaad ee wareegga labaad wuxuu ku xiran yahay albaabka ugu horreeya ee MOSFET, soo-saarka labaad ee wareegga labaad wuxuu ku xiran yahay albaabka MOSFET ee ugu horreeya. Wax soo saarka ugu horreeya ee pulse transformer secondary secondary wuxuu ku xiran yahay albaabka MOSFET ugu horeysa, wax soo saarka labaad ee pulse transformer secondary wuxuu ku xiran yahay albaabka MOSFET labaad, oo lagu garto in wax soo saarka ugu horreeya ee pulse transformer secondary uu isna ku xiran yahay. transistor-ka ugu horreeya ee dareeraha ah, iyo soo-saarka labaad ee wareegga labaad ee garaaca wadnaha ayaa sidoo kale ku xiran transistor-ka dheecaanka labaad. Dhinaca aasaasiga ah ee beddelka garaaca wadnaha ayaa sidoo kale ku xiran kaydinta tamarta iyo wareegga sii deynta.
Wareegga kaydinta tamarta tamarta waxaa ka mid ah iska caabin, capacitor iyo diode, resistor iyo capacitor waxay ku xiran yihiin isbarbar, iyo wareegga isbarbardhigga ee aan soo sheegnay ayaa si isdaba-joog ah ugu xiran diode. Qaabka utility wuxuu leeyahay saameyn faa'iido leh Qaabka utility wuxuu kaloo leeyahay transistor-ka dareeraha ugu horreeya ee ku xiran wax-soo-saarka koowaad ee transistor-ka labaad, iyo transistor-ka labaad ee dareeraha ah ee ku xiran wax-soo-saarka labaad ee pulse transistor, si marka garaaca wadnaha uu soo saaro wax yar. heerka MOSFET ugu horraysa iyo MOSFET labaad si dhakhso ah ayaa loo dami karaa si loo hagaajiyo xawaaraha xiritaanka MOSFET, iyo si loo yareeyo khasaaraha MOSFET.Signiinta ee chip kontoroolka PWM waxay ku xiran tahay kor u qaadista signal MOSFET inta u dhaxaysa wax soo saarka aasaasiga ah iyo garaaca wadnaha. Transformer primary, kaas oo loo isticmaali karo kor u qaadida calaamadaha. Soosaarka calaamada ee chip-ka kontoroolka PWM iyo beddelka garaaca wadnaha aasaasiga ah waxay ku xidhan yihiin MOSFET si loo kordhiyo signalka, taas oo sii wanaajin karta awoodda wadista calaamada PWM.
Transformer-ka aasaasiga ah ee wadnaha ayaa sidoo kale ku xiran wareegga sii-deynta kaydinta tamarta, marka calaamadda PWM ay tahay heer hoose, wareegga tamarta kaydinta tamarta ayaa sii daaya tamarta ku kaydsan qalabka garaaca wadnaha marka PWM uu yahay heer sare, isagoo hubinaya in albaabka Isha MOSFET ugu horraysa iyo MOSFET labaad waa mid aad u hooseeya, taas oo door ka ciyaarta ka hortagga faragelinta.
Hirgelin gaar ah, MOSFET Q1 awood yar oo loogu talagalay kordhinta calaamadda waxay ku xiran tahay inta u dhexeysa terminalka wax soo saarka signalka A ee qalabka kontoroolka PWM iyo asaasiga ah ee wareegga garaaca wadnaha Tl, terminaalka ugu horreeya ee soo saarida sare ee wareegga garaaca wadnaha ayaa ku xiran. Albaabka MOSFET Q4 ee ugu horreeya iyada oo loo sii marayo diode D1 iyo iska caabiyaha wadista Rl, terminalka wax soo saarka labaad ee heerka labaad ee wareegga garaaca wadnaha wuxuu ku xiran yahay albaabka labaad MOSFET Q5 iyada oo loo sii marayo diode D2 iyo iska caabiyaha wadista R2, iyo Terminalka ugu horreeya ee soo saarista sare ee wareegga garaaca wadnaha wuxuu sidoo kale ku xiran yahay saddex-geesoodka koowaad ee Q2, kan labaad ee dheecaanka Q3 wuxuu sidoo kale ku xiran yahay triode labaad ee Q3. MOSFET Q5, terminaalka wax soo saarka ee ugu horreeya ee transistor-ka garaaca wadnaha wuxuu sidoo kale ku xiran yahay transistor-ka koowaad ee Q2, iyo terminalka labaad ee wax soo saarka ee wareegga labaad wuxuu sidoo kale ku xiran yahay transistor-ka labaad ee Q3.
Albaabka MOSFET Q4 ee ugu horreeya waxa uu ku xidhan yahay iska caabiyaha dareeraha ee R3, albaabka labaad MOSFET Q5 waxa uu ku xidhan yahay iska caabiyaha dareeraha ee R4. Asal ahaan Transformer-ka pulse Tl waxa kale oo uu ku xidhan yahay kaydka tamarta iyo wareegga sii daynta, kaydinta tamarta iyo wareegga sii daynta waxa ka mid ah resistor R5, capacitor Cl, iyo diode D3, resistor R5 iyo capacitor Cl waxa ay ku xidhan yihiin barbar-socod, iyo wareegga isbarbardhigga ee aan soo sheegnay waxay si isdaba-joog ah ugu xiran yihiin diode D3. wax soo saarka calaamada PWM ee ka soo baxa kontoroolka PWM wuxuu ku xiran yahay MOSFET Q2 ee hooseeya, iyo MOSFET Q2 ee hooseeya waxay ku xiran tahay heerka labaad ee wareegga garaaca wadnaha. waxaa lagu kordhiyey MOSFET Ql oo awood yar ah iyo wax soo saarka ilaa meesha ugu horeysa ee beddelka garaaca wadnaha Tl. Marka signalka PWM uu sarreeyo, terminalka wax-soo-saarka koowaad iyo kan labaad ee wax-soo-saarka sare ee wareegga garaaca wadnaha Tl wuxuu soo saaraa calaamado heer sare ah si loo wado MOSFET Q4 ee ugu horreeya iyo MOSFET Q5 labaad si loo qabto.
Marka calaamada PWM hooseeyo, wax soo saarka ugu horreeya iyo wax soo saarka labaad ee wareegga garaaca wadnaha Tl heerka hoose ee calaamadaha, transistor-ka koowaad ee Q2 iyo qulqulka labaad ee transistor Q3, koorsada MOSFETQ4 ee ugu horreysa ee albaabka iyada oo loo marayo iska caabinta dareeraha R3, transistor-ka ugu horreeya ee Q2 ee dheecaanka, kan labaad MOSFETQ5 gate source capacitance iyada oo loo marayo iska caabin biyo shuban R4, transistor dheecaanka labaad Q3 ee dheecaanka, kan labaad MOSFETQ5 albaabka capacitance iyada oo resistor dheecaan R4, transistor labaad dheecaan Q3 ee dheecaan, labaad MOSFETQ5 Ilaha Ilaha capacitance iyada oo loo marayo iska caabiyaha qulqulka R4, transistor-ka labaad ee qulqulka Q3 ee dareeraha. Isha labaad ee MOSFETQ5 waxa lagu sii daayaa iyada oo loo sii marayo biyo-celinta iska caabinta R4 iyo marin-biyoodka labaad ee Q3, si MOSFET Q4-ta ugu horreysa iyo MOSFET Q5-ta labaad loo damiyo si dhaqso ah, khasaaraha korontadu uu yarayn karo.
Marka calaamada PWM hooseeyo, wareegga sii deynta tamarta kaydsan ee ka kooban resistor R5, capacitor Cl iyo diode D3 waxay sii daayaan tamarta ku kaydsan qalabka garaaca wadnaha marka PWM uu sarreeyo, isagoo hubinaya in isha albaabka MOSFET Q4 ee ugu horreeya iyo MOSFET labaad. Q5 aad buu u hooseeyaa, kaas oo u adeega ujeedada ka hortagga faragelinta. Diode Dl iyo diode D2 waxay qabtaan wax soo saarka hadda si aan toos ahayn, sidaas darteed hubinta tayada mawjada PWM, isla mar ahaantaana, waxay sidoo kale ka ciyaartaa doorka ka-hortagga faragelinta ilaa xad.
Waqtiga boostada: Agoosto-02-2024
