Yini i-inverter?
I-inverter iguqula amandla e-DC (ibhethri, ibhethri lesitoreji) libe amandla e-AC (ngokuvamile i-220V, 50Hz sine wave). Iqukethe ibhuloho le-inverter, i-logic yokulawula kanye nesifunda sokuhlunga.
Kalula nje, i-inverter iyisisetshenziswa se-elekthronikhi esiguqula i-voltage ephansi (12 noma 24 volts noma 48 volts) yamanje eqondile ibe ama-volts angu-220 alternating current. Ngoba ngokuvamile sisebenzisa isilungisi samanje esishintshayo esingu-220-volt ukuze sisiguqule sibe esamanje esiqondile, futhi isiguquli sisebenza ngokuphambene, yingakho igama.
Yini ai-sine wave inverter
Ama-inverters angahlukaniswa ngokuya ngamagagasi okukhiphayo, a. ihlukaniswe ngama-square wave inverters, b. ama-wave inverters ashintshiwe kanye c. i-sine wave inverters.
Ngakho-ke, incazelo ye-sine wave inverter iyi-inverter okuphuma kwayo i-wave wave kuyi-sine wave.
Inzuzo yayo ukuthi i-waveform yokuphumayo yinhle, ukuhlanekezela kuphansi kakhulu, futhi i-waveform yayo yokuphumayo ihambisana ngokuyisisekelo ne-AC waveform yegridi yamapayipi. Eqinisweni, ikhwalithi yamandla e-AC anikezwa ngabahle kakhului-sine wave inverteriphakeme kunaleyo yegridi. I-sine wave inverter inokuphazamiseka okuncane kumsakazo, imishini yokuxhumana kanye nemishini yokunemba, umsindo ophansi, ukuguquguquka okunamandla komthwalo, ingahlangabezana nokusetshenziswa kwayo yonke imithwalo ye-AC, futhi wonke umshini unokusebenza okuphezulu; ukungahambi kahle kwayo ukuthi umugqa kanye nokuguqulwa kwesihlobo sokulungiswa kwe-wave I-inverter iyinkimbinkimbi, inezidingo eziphezulu zokulawula ama-chips kanye nobuchwepheshe bokulungisa, futhi kuyabiza.
Isebenza kanjani?
Ngaphambi kokwethula umgomo wokusebenza wei-sine wave inverter, qala ukwethula isimiso sokusebenza se-inverter.
I-inverter iyisiguquli se-DC kuya ku-AC, empeleni okuyinqubo yokuguqula i-voltage ngesiguquli. Isiguquli siguqula i-voltage ye-AC yegridi yamandla ibe okokuphumayo okuzinzile kwe-12V DC, kuyilapho isiguquli siguqula ukukhishwa kwamandla kagesi angu-12V DC nge-Adapter ibe i-high-frequency high-voltage AC; zombili izingxenye zisebenzisa indlela evame ukusetshenziswa kakhulu yokushintshanisa ububanzi be-pulse (PWM). Ingxenye yayo eyinhloko isilawuli esihlanganisiwe se-PWM, i-Adapter isebenzisa i-UC3842, futhi i-inverter isebenzisa i-chip ye-TL5001. Ububanzi be-voltage esebenzayo ye-TL5001 yi-3.6 ~ 40V, futhi ifakwe isikhulisamandla sephutha, isilawuli, i-oscillator, ijeneretha ye-PWM enokulawula kwendawo efile, isekethe yokuvikela i-voltage ephansi kanye nesekethe yokuvikela isekethe emfushane.
Ingxenye yesixhumi esibonakalayo yokokufaka: Kunamasiginali angu-3 engxenyeni yokokufaka, i-12V DC yokufaka i-VIN, i-voltage evumela umsebenzi ENB kanye nesiginali yokulawula yamanje ye-Panel DIM. I-VIN inikezwa i-Adapter, i-ENB voltage inikezwa yi-MCU ebhodini lomama, inani layo lingu-0 noma i-3V, uma i-ENB=0, i-inverter ingasebenzi, futhi uma i-ENB=3V, i-inverter isesimweni esivamile sokusebenza; kuyilapho i-DIM voltage Inikezwe ibhodi elikhulu, ububanzi bayo bokuhluka buphakathi kuka-0 no-5V. Amanani ahlukene e-DIM abuyiselwa kutheminali yempendulo yesilawuli se-PWM, futhi okwamanje okuhlinzekwe isiguquli esishintshashintshayo ekulayisheni nakho kuzohluka. Uma lincane inani le-DIM, liba lincane inani lamanje eliphumayo le-inverter. enkulu.
Isekhethi yokuqalisa i-Voltage: Uma i-ENB isezingeni eliphezulu, ikhipha i-voltage ephezulu ukuze ikhanyise ishubhu le-backlight ye-Panel.
Isilawuli se-PWM: Siqukethe le misebenzi elandelayo: i-voltage yereferensi yangaphakathi, isikhulisi sephutha, i-oscillator ne-PWM, ukuvikelwa kwe-overvoltage, ukuvikelwa kwe-undervoltage, ukuvikelwa kwesekethe emfushane, kanye ne-transistor ephumayo.
Ukuguqulwa kwe-DC: Isekethe yokuguqula i-voltage yakhiwe ishubhu yokushintsha ye-MOS kanye ne-inductor yokugcina amandla. I-pulse yokufaka ikhuliswa i-push-pull amplifier bese ishayela ithubhu ye-MOS ukwenza isenzo sokushintsha, ukuze amandla kagesi e-DC ashaje futhi akhiphe i-inductor, ukuze omunye umkhawulo we-inductor uthole i-AC Voltage.
I-LC oscillation kanye nesekethe yokuphumayo: qinisekisa ukuthi i-voltage engu-1600V edingekayo ukuze isibani siqale, futhi wehlise i-voltage ibe ngu-800V ngemva kokuba isibani siqalisiwe.
Impendulo ye-voltage ephumayo: Uma umthwalo usebenza, i-voltage yesampula ibuyiselwa emuva ukuze kuzinzise ukuphuma kwe-voltage ye-I inverter.
(Complex sine wave circuit diagram)
Umehluko phakathi kwe-sine wave inverter kanye ne-inverter evamile ukuthi i-waveform yayo yokuphuma iyigagasi eliphelele le-sine elinezinga eliphansi lokuhlanekezela, ngakho-ke akukho ukuphazamiseka emsakazweni nemishini yokuxhumana, umsindo nawo uphansi kakhulu, umsebenzi wokuvikela uphelele. , futhi ukusebenza kahle sekukonke kuphezulu.
Isizathu sokuthi kunganii-sine wave inverteringakhipha i-sine wave ephelele kungenxa yokuthi isebenzisa ubuchwepheshe be-SPWM obuthuthuke kakhulu kunobuchwepheshe be-PWM.
Umgomo we-SPWM usekelwe kumgomo ofanayo wokuthi ama-pulses asebenza ngesikhathi samadivayisi: uma ama-pulses asebenza ngamadivayisi asebenza ngesikhathi, umkhiqizo wenani eliphakeme nesikhathi sokwenza kuyalingana, futhi lawa ma-pulses angalinganiselwa alingane.
I-SPWM iqhathanisa igagasi elingunxantathu nemvamisa engaguquki kanye nenani eliphakeme elingaguquki (njengokushintsha imvamisa u-10k) nereferensi ye-sine wave (igagasi eliyisisekelo) lamafrikhwensi aguquguqukayo kanye ne-voltage, ukuze ishaye i-voltage ye-DC (i-pulse eshintsha umjikelezo womsebenzi) ukuze usondele igagasi elinereferensi ye-sine kudivayisi. I-amplitude nemvamisa yereferensi ye-sine wave kulungiswa ukuze kukhiqizwe amaza okushintshanisa ububanzi be-voltage ye-DC voltage alingana nereferensi ye-sine wave anama-amplitude ahlukene namaza.
Isikhathi sokuthumela: Feb-05-2024
