Pane mhinduro huru mbiri:
Imwe ndeye kushandisa yakazvipira mutyairi chip kutyaira iyo MOSFET, kana kushandiswa kwekukurumidza mafotocouplers, transistors inoumba dunhu kutyaira iyo MOSFET, asi yekutanga mhando yemaitiro inoda kupihwa yakazvimirira magetsi; iyo imwe mhando ye pulse transformer kutyaira MOSFET, uye mu pulse drive circuit, maitiro ekuvandudza kushandura frequency yedhiraivha yedhiraivha kuwedzera simba rekutyaira, nepazvinobvira, kuderedza huwandu hwezvikamu, ndicho chinodiwa nekukurumidza. kugadzirisa iyoikozvino Matambudziko.
Mhando yekutanga yedhiraivha chirongwa, hafu-bhiriji inoda maviri akazvimirira magetsi emagetsi; zambuko rakazara rinoda matatu akazvimirira magetsi ekushandisa, ese hafu-zambuko uye yakazara-zambuko, yakawandisa zvikamu, zvisingakodzeri kudzikisa mutengo.
Rudzi rwechipiri rwechirongwa chekutyaira, uye patent ndiyo yepedyo yakapfuura hunyanzvi hwezita rekutanga "simba repamusoro.MOSFET drive circuit" patent (nhamba yekunyorera 200720309534. 8), iyo patent inongowedzera kuramba kuburitsa kuburitsa gedhi repamusoro-simba MOSFET charge, kuzadzisa chinangwa chekuvhara, kudonha kwechiratidzo chePWM kwakakura. kudonha kumucheto kwePWM chiratidzo chikuru, izvo zvinozotungamira kunonoka kudzima kweMOSFET, kurasikirwa kwemagetsi kwakakura kwazvo;
Pamusoro pezvo, iyo patent chirongwa cheMOSFET basa rinogona kukanganisa, uye iyo PWM yekudzora chip inoda kuve nesimba rakakura rekubuda, zvichiita kuti tembiricha yechip ive yakakwirira, inokanganisa hupenyu hwesevhisi yechip. Zviri mukati mezvakagadzirwa Chinangwa cheiyi utility modhi ndechekupa yakakwirira-simba MOSFET drive dunhu, kushanda yakagadzikana uye zero kuzadzisa chinangwa cheiyi utility modhi yekugadzira tekinoroji mhinduro - yakakwirira-simba MOSFET drive dhiraivha, chiratidzo chekubuda iyo PWM yekudzora chip yakabatana kune yekutanga pulse transformer, iyo yekutanga kubuda of iyo yechipiri pulse transformer yakabatana negedhi rekutanga reMOSFET, yechipiri kubuda kweyechipiri pulse transformer yakabatana neyekutanga MOSFET gedhi, yechipiri kubuda kweyechipiri pulse transformer yakabatana kune yekutanga gedhi reMOSFET. Yekutanga kubuda kwepulse transformer yechipiri yakabatana negedhi reMOSFET yekutanga, yechipiri kubuda kwepulse transformer yechipiri yakabatana negedhi rechipiri MOSFET, inoratidzwa mukuti yekutanga kubuda kwepulse transformer yechipiri yakabatana zvakare. kune yekutanga kubuda transistor, uye yechipiri kubuda kwepulse transformer yechipiri inobatanidzwawo kune yechipiri discharge transistor. Rutivi rwekutanga rwepulse transformer yakabatanawo neiyo simba rekuchengetedza uye kuburitsa dunhu.
Iyo simba rekuchengetedza rekuburitsa redunhu rinosanganisira resistor, capacitor uye diode, resistor uye capacitor zvakabatana zvakafanana, uye yambotaurwa parallel circuit yakabatana munhevedzano ne diode. Iyo utility modhi ine mhedzisiro inobatsira Iyo utility modhi inewo yekutanga discharge transistor yakabatana kune yekutanga kubuda kwetransformer yechipiri, uye yechipiri discharge transistor yakabatana neyechipiri kubuda kwepulse transformer, zvekuti kana pulse transformer inoburitsa yakaderera. nhanho, yekutanga MOSFET uye yechipiri MOSFET inogona kukurumidza kuburitswa kuti ivandudze kuvharika kumhanya kweMOSFET, uye kuderedza kurasikirwa kweMOSFET.Chiratidzo chePWM control chip chakabatana nechiratidzo chekusimudzira MOSFET pakati pekutanga kubuda uye pulse. transformer yepuraimari, inogona kushandiswa kukwidziridza chiratidzo. Iyo siginecha inobuda yePWM yekudzora chip uye yekutanga pulse transformer yakabatana neMOSFET yekusimudza chiratidzo, iyo inogona kuwedzera kuvandudza kugona kwekutyaira kwePWM chiratidzo.
Iyo yekutanga pulse transformer inobatanidzwawo kune simba rekuchengetedza kuburitsa redunhu, kana chiratidzo chePWM chiri padanho rakaderera, simba rekuchengetedza simba rekuburitsa rinoburitsa iro rakachengetwa simba mu pulse transformer kana PWM iri padanho repamusoro, kuve nechokwadi chekuti gedhi. tsime rekutanga MOSFET uye yechipiri MOSFET yakaderera zvakanyanya, iyo inoita basa mukudzivirira kupindira.
Mukuita kwakananga, iyo yakaderera-simba MOSFET Q1 yekusimudza chiratidzo yakabatana pakati pechiratidzo chinoburitsa terminal A yePWM control chip uye yekutanga yepulse transformer Tl, yekutanga kubuda terminal yechipiri yepulse transformer yakabatana gedhi rekutanga MOSFET Q4 kuburikidza ne diode D1 uye yekutyaira yekudzivirira Rl, yechipiri inobuda terminal yechipiri yepulse transformer yakabatana negedhi rechipiri MOSFET Q5 kuburikidza ne diode D2 uye yekutyaira resistor R2, uye iyo yekutanga inoburitsa terminal yechipiri yepulse transformer yakabatana kune yekutanga drain triode Q2, uye yechipiri drain triode Q3 zvakare yakabatana kune yechipiri drain triode Q3. MOSFET Q5, yekutanga inobuda terminal yepulse transformer yechipiri yakabatana kune yekutanga drain transistor Q2, uye yechipiri inobuda terminal yepulse transformer yechipiri yakabatana kune yechipiri drain transistor Q3.
Gedhi rekutanga MOSFET Q4 rakabatana nedhiraivha redhizaini R3, uye gedhi rechipiri MOSFET Q5 rakabatana kune yekudonhedza resistor R4. iyo yekutanga yepulse transformer Tl zvakare yakabatana kune simba rekuchengetedza uye kuburitsa dunhu, uye simba rekuchengetedza uye kuburitsa redunhu rinosanganisira resistor R5, capacitor Cl, uye diode D3, uye resistor R5 uye capacitor Cl yakabatana mukati. parallel, uye yambotaurwa parallel circuit yakabatana munhevedzano neiyo diode D3. iyo PWM siginecha inobuda kubva kuPWM control chip yakabatana kune yakaderera-simba MOSFET Q2, uye yakaderera-simba MOSFET Q2 yakabatana kune yechipiri chepulse transformer. inowedzerwa neiyo yakaderera-simba MOSFET Ql uye inobuda kune yekutanga yepulse transformer Tl. Kana chiratidzo chePWM chakakwira, yekutanga inoburitsa terminal uye yechipiri inobuda terminal yechipiri yepulse transformer Tl inoburitsa yakakwira mwero masiginecha kutyaira yekutanga MOSFET Q4 uye yechipiri MOSFET Q5 kuitisa.
Kana chiratidzo chePWM chadzikira, yekutanga kuburitsa uye yechipiri kubuda kwepulse transformer Tl yechipiri inobuda yakaderera mwero masaini, yekutanga drain transistor Q2 uye yechipiri drain transistor Q3 conduction, yekutanga MOSFETQ4 gedhi sosi capacitance kuburikidza nedrain resistor R3, yekutanga drain transistor Q2 yekuburitsa, yechipiri MOSFETQ5 gedhi sosi capacitance kuburikidza nedrain resistor R4, yechipiri drain transistor Q3 yekuburitsa, yechipiri MOSFETQ5 gedhi sosi capacitance kuburikidza nedrain resistor R4, yechipiri drain transistor Q3 yekubuda, yechipiri. MOSFETQ5 gedhi sosi capacitance kuburikidza nedrain resistor R4, yechipiri drain transistor Q3 yekuburitsa. Yechipiri MOSFETQ5 gedhi sosi capacitance inoburitswa kuburikidza nedrain resistor R4 uye yechipiri drain transistor Q3, kuitira kuti yekutanga MOSFET Q4 uye yechipiri MOSFET Q5 inogona kudzimwa nekukurumidza uye kurasikirwa kwesimba kunogona kuderedzwa.
Kana iyo PWM chiratidzo yadzikira, iyo yakachengetwa simba rekuburitsa redunhu inoumbwa neresistor R5, capacitor Cl uye diode D3 inoburitsa simba rakachengetwa mumhepo inoshandura kana PWM yakakwira, kuve nechokwadi chekuti gedhi rinobva rekutanga MOSFET Q4 uye yechipiri MOSFET. Q5 yakanyanya kuderera, iyo inoshanda chinangwa chekurwisa-kupindira. Diode Dl uye diode D2 inoitisa iyo inobuda ikozvino unidirectionally, nekudaro ichiva nechokwadi chemhando yePWM waveform, uye panguva imwecheteyo, inoitawo basa rekurwisa-kupindira kune imwe nhanho.
Nguva yekutumira: Aug-02-2024
