Pali njira ziwiri zazikulu:
Chimodzi ndicho kugwiritsa ntchito chipangizo choyendetsa galimoto choyendetsa MOSFET, kapena kugwiritsa ntchito ma photocouplers ofulumira, ma transistors amapanga dera loyendetsa MOSFET, koma mtundu woyamba wa njira umafuna kuperekedwa kwa magetsi odziimira okha; mtundu wina wa pulse transformer kuyendetsa MOSFET, ndi pulse drive circuit, momwe mungasinthire kusintha kwafupipafupi kwa kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe ka kayendetsedwe kake. kuti athetseMavuto apano.
Mtundu woyamba wa chiwembu pagalimoto, theka mlatho amafuna awiri odziimira mphamvu magetsi; mlatho wathunthu umafunikira magetsi atatu odziyimira pawokha, onse theka-mlatho ndi mlatho wathunthu, zigawo zambiri, zomwe sizingathandize kuchepetsa mtengo.
Mtundu wachiwiri wa pulogalamu yoyendetsa, ndipo patent ndiye luso lapafupi kwambiri la dzina lopangidwa "mphamvu zamphamvuMOSFET drive circuit" patent (nambala yofunsira 200720309534. 8), patent imangowonjezera kukana kutulutsa kutulutsa chipata champhamvu champhamvu cha MOSFET, kuti akwaniritse cholinga chotseka, kugwa kwa chizindikiro cha PWM ndi chachikulu. kugwa m'mphepete mwa chizindikiro cha PWM ndi chachikulu, chomwe chidzatsogolera kutsekedwa kwapang'onopang'ono kwa MOSFET, kutaya mphamvu ndi kwakukulu kwambiri;
Kuphatikiza apo, pulogalamu ya patent MOSFET ntchito imatha kusokonezedwa, ndipo chipangizo chowongolera cha PWM chiyenera kukhala ndi mphamvu yayikulu yotulutsa, kupangitsa kutentha kwa chip kukhala kwakukulu, kumakhudza moyo wautumiki wa chip. Zomwe zili muzopangazo Cholinga chachitsanzo ichi ndikupereka mawonekedwe amphamvu kwambiri a MOSFET pagalimoto, kugwira ntchito mokhazikika komanso zero kuti akwaniritse cholinga chaukadaulo waukadaulo wogwiritsa ntchito mphamvu zambiri za MOSFET, kutulutsa kwamagetsi Chip chowongolera cha PWM chimalumikizidwa ndi chosinthira choyambirira cha pulse, the chotuluka choyamba of thiransifoma yachiwiri imalumikizidwa ndi chipata choyamba cha MOSFET, chotulutsa chachiwiri cha chosinthira chachiwiri chimalumikizidwa ndi chipata choyamba cha MOSFET, chotuluka chachiwiri cha chosinthira chachiwiri chimalumikizidwa pachipata choyamba cha MOSFET. Kutulutsa koyamba kwa pulse transformer secondary kumalumikizidwa ndi chipata cha MOSFET yoyamba, kutulutsa kwachiwiri kwa pulse transformer secondary kumalumikizidwa ndi chipata chachiwiri cha MOSFET, chomwe chimadziwika kuti kutulutsa koyamba kwa pulse transformer secondary kumalumikizidwanso. kwa transistor woyamba kutulutsa, ndipo linanena bungwe lachiwiri la zimachitika thiransifoma yachiwiri chikugwirizananso wachiwiri kumaliseche transistor. Mbali yoyamba ya pulse transformer imalumikizidwanso ndi malo osungiramo mphamvu ndi kumasula dera.
Dera lotulutsa mphamvu zosungiramo mphamvu limaphatikizapo kutsutsa, capacitor ndi diode, resistor ndi capacitor zimagwirizanitsidwa mofanana, ndipo dera lofanana lomwe tatchulalo limalumikizidwa motsatizana ndi diode. Chitsanzo chothandizira chimakhala ndi zotsatira zopindulitsa Chitsanzo chothandizira chimakhalanso ndi transistor yoyamba yotulutsa yolumikizidwa ndi kutulutsa koyamba kwa thiransifoma yachiwiri, ndipo yachiwiri yotulutsa transistor yolumikizidwa ndi kutulutsa kwachiwiri kwa pulse transformer, kotero kuti pamene thiransifoma imatulutsa mpweya wochepa. mlingo, MOSFET yoyamba ndi MOSFET yachiwiri ikhoza kutulutsidwa mwamsanga kuti ipititse patsogolo kuthamanga kwa MOSFET, komanso kuchepetsa kutayika kwa MOSFET.Chizindikiro cha chipangizo chowongolera cha PWM chikugwirizana ndi MOSFET yokulitsa chizindikiro pakati pa kutulutsa koyambirira ndi kugunda. thiransifoma pulayimale, yomwe ingagwiritsidwe ntchito kukulitsa chizindikiro. Kutulutsa kwa siginecha kwa chipangizo chowongolera cha PWM ndi chosinthira choyambirira cha pulse zimalumikizidwa ndi MOSFET pakukulitsa ma siginecha, zomwe zitha kupititsa patsogolo luso loyendetsa chizindikiro cha PWM.
Pulojekiti yoyamba ya pulse imagwirizanitsidwanso ndi dera lotulutsa mphamvu zosungiramo mphamvu, pamene chizindikiro cha PWM chili pamtunda wochepa, dera losungiramo mphamvu zosungiramo mphamvu limatulutsa mphamvu zosungidwa mu pulse transformer pamene PWM ili pamtunda wapamwamba, kuonetsetsa kuti chipatacho chikhale chochepa. gwero la MOSFET yoyamba ndipo MOSFET yachiwiri ndiyotsika kwambiri, yomwe imathandizira kupewa kusokonezedwa.
Pakukhazikitsa kwapadera, MOSFET Q1 yamphamvu yocheperako pakukulitsa ma siginecha imalumikizidwa pakati pa cholumikizira chizindikiro A cha chipangizo chowongolera cha PWM ndi choyambira cha pulse transformer Tl, choyimira choyamba chachiwiri cha pulse transformer chimalumikizidwa ndi chipata cha MOSFET Q4 yoyamba kudzera pa diode D1 ndi chowongolera choyendetsa Rl, cholumikizira chachiwiri chachiwiri cha pulse transformer chimalumikizidwa ndi chipata chachiwiri cha MOSFET Q5 kudzera pa diode D2 ndi chopinga cha R2, ndi woyamba linanena bungwe terminal ya yachiwiri ya kugunda thiransifoma nawonso chikugwirizana ndi kuda woyamba triode Q2, ndi kuda chachiwiri kuda triode Q3 chikugwirizananso kukhetsa yachiwiri triode Q3. MOSFET Q5, choyimira choyamba cha pulse transistor yachiwiri chimalumikizidwanso ndi cholumikizira choyamba cha Q2, ndipo cholumikizira chachiwiri cha pulse transformer secondary chimalumikizidwanso ndi cholumikizira chachiwiri cha Q3.
Chipata cha MOSFET Q4 yoyamba chimalumikizidwa ndi chopondera cha R3, ndipo chipata chachiwiri cha MOSFET Q5 chimalumikizidwa ndi cholumikizira R4. Choyambirira cha pulse transformer Tl chimalumikizidwanso ndi kusungirako mphamvu ndi kutulutsa mphamvu, ndipo gawo losungiramo mphamvu ndi kutulutsa limaphatikizapo resistor R5, capacitor Cl, ndi diode D3, ndi resistor R5 ndi capacitor Cl zolumikizidwa mkati. kufanana, ndipo dera lofananira lomwe tatchulalo limalumikizidwa mndandanda ndi diode D3. kutulutsa kwa siginecha ya PWM kuchokera ku chipangizo chowongolera cha PWM kumalumikizidwa ndi MOSFET Q2 yamphamvu yotsika, ndipo MOSFET Q2 yamphamvu yotsika imalumikizidwa ndi yachiwiri ya pulse transformer. imakulitsidwa ndi MOSFET Ql yamphamvu yotsika ndikutuluka kupita ku pulayimale ya pulse transformer Tl. Chizindikiro cha PWM chikakhala chapamwamba, choyimira choyamba chotulutsa ndi chachiwiri chotulutsa chachiwiri cha pulse transformer Tl chimatulutsa ma siginecha apamwamba kuti ayendetse MOSFET Q4 yoyamba ndi MOSFET Q5 yachiwiri kuchita.
Chizindikiro cha PWM chikakhala chochepa, kutulutsa koyamba ndi kutulutsa kwachiwiri kwa pulse transformer Tl yachiwiri kutulutsa zizindikiro zotsika, kukhetsa koyamba kwa transistor Q2 ndi kukhetsa kwachiwiri kwa transistor Q3 conduction, choyamba cha MOSFETQ4 chipata gwero la capacitance kupyolera mu resistor R3, woyamba kukhetsa transistor Q2 kukhetsa, yachiwiri MOSFETQ5 chipata gwero gwero capacitance kudzera kukhetsa resistor R4, yachiwiri kuda transistor Q3 kukhetsa, yachiwiri MOSFETQ5 chipata gwero capacitance kudzera kukhetsa resistor R4, yachiwiri kudayi transistor Q3 kukhetsedwa, chachiwiri. MOSFETQ5 chipata gwero gwero capacitance kudzera kukhetsa resistor R4, wachiwiri kukhetsa transistor Q3 kukhetsedwa. Yachiwiri MOSFETQ5 chipata gwero capacitance amatulutsidwa kudzera kukhetsa resistor R4 ndi kuda chachiwiri transistor Q3, kuti woyamba MOSFET Q4 ndi wachiwiri MOSFET Q5 akhoza kuzimitsidwa mofulumira ndi kutaya mphamvu akhoza kuchepetsedwa.
Chizindikiro cha PWM chikakhala chochepa, dera losungiramo mphamvu losungidwa lomwe limapangidwa ndi resistor R5, capacitor Cl ndi diode D3 limatulutsa mphamvu zosungidwa mu pulse transformer pamene PWM ili pamwamba, kuonetsetsa kuti chipata cha MOSFET Q4 choyamba ndi MOSFET yachiwiri. Q5 ndi yotsika kwambiri, yomwe imakhala ndi cholinga chotsutsana ndi kusokoneza. Diode Dl ndi diode D2 zimatulutsa zomwe zikuchitika pano mosagwirizana, motero zimatsimikizira mtundu wa mawonekedwe a PWM, ndipo nthawi yomweyo, imagwiranso ntchito yotsutsana ndi kusokoneza pamlingo wina.
Nthawi yotumiza: Aug-02-2024
