Kodi inverter ndi chiyani?
Inverter imatembenuza mphamvu ya DC (batire, batire yosungira) kukhala mphamvu ya AC (nthawi zambiri 220V, 50Hz sine wave). Amakhala ndi inverter mlatho, logic control ndi fyuluta dera.
Mwachidule, inverter ndi chipangizo chamagetsi chomwe chimasintha magetsi otsika (12 kapena 24 volts kapena 48 volts) mwachindunji kukhala 220 volts alternating current. Chifukwa nthawi zambiri timagwiritsa ntchito 220-volt alternating rectifier kuti isinthe kukhala yachindunji, ndipo inverter imachita mosiyana, ndiye dzina.
Kodi asine wave inverter
Ma inverters amatha kugawidwa molingana ndi mawonekedwe awo otulutsa, a. kugawidwa mu ma square wave inverters, b. osinthidwa ma wave inverters ndi c. ma sine wave inverters.
Chifukwa chake, tanthauzo la sine wave inverter ndi inverter yomwe mawonekedwe ake amatuluka ndi sine wave.
Ubwino wake ndikuti mawonekedwe otulutsa ndi abwino, kupotozako ndikotsika kwambiri, ndipo mawonekedwe ake otulutsa amagwirizana kwambiri ndi mawonekedwe a AC a grid mains. M'malo mwake, mtundu wa mphamvu ya AC yoperekedwa ndi zabwino kwambirisine wave inverterndi apamwamba kuposa grid. Sine wave inverter imakhala ndi zosokoneza pang'ono pa wailesi, zida zoyankhulirana ndi zida zolondola, phokoso lochepa, kusinthasintha kwamphamvu kwa katundu, amatha kukumana ndi kugwiritsa ntchito katundu wa AC, ndipo makina onse ali ndi mphamvu zambiri; kuipa kwake ndikuti mzere ndi kuwongolera kwachibale kusinthika kwa mafunde The inverter ndizovuta, zimakhala ndi zofunika kwambiri pakuwongolera tchipisi ndi ukadaulo wokonza, ndipo ndi okwera mtengo.
Zimagwira ntchito bwanji?
Asanatchule mfundo yogwirira ntchito yasine wave inverter, choyamba yambitsani mfundo yogwiritsira ntchito inverter.
Inverter ndi DC kupita ku AC transformer, yomwe kwenikweni ndi njira yosinthira magetsi ndi chosinthira. Chosinthiracho chimasintha mphamvu yamagetsi ya AC ya gridi yamagetsi kuti ikhale yokhazikika ya 12V DC, pomwe inverter imatembenuza 12V DC voliyumu yotulutsa ndi Adapter kukhala AC yothamanga kwambiri; mbali zonse ziwirizi zimagwiritsanso ntchito njira yosinthira pulse wide modulation (PWM). Gawo lake lalikulu ndi PWM Integrated controller, Adapter imagwiritsa ntchito UC3842, ndipo inverter imagwiritsa ntchito chipangizo cha TL5001. Mphamvu yamagetsi yogwira ntchito ya TL5001 ndi 3.6 ~ 40V, ndipo ili ndi amplifier yolakwika, chowongolera, oscillator, jenereta ya PWM yokhala ndi zone control yakufa, dera lodzitchinjiriza lotsika komanso gawo lalifupi lachitetezo.
Gawo lolowetsamo: Pali ma siginecha a 3 mu gawo lolowetsa, 12V DC yolowera VIN, ntchito yothandiza magetsi ENB ndi chizindikiro chowongolera cha Panel cha DIM. VIN imaperekedwa ndi Adapter, ENB voltage imaperekedwa ndi MCU pa bolodi la amayi, mtengo wake ndi 0 kapena 3V, pamene ENB = 0, inverter sikugwira ntchito, ndipo pamene ENB = 3V, inverter ili mu chikhalidwe chogwira ntchito; pomwe DIM voliyumu Yoperekedwa ndi bolodi yayikulu, kusiyanasiyana kwake kuli pakati pa 0 ndi 5V. Makhalidwe osiyanasiyana a DIM amabwezeredwa ku chowongolera chowongolera cha PWM, ndipo zomwe zaperekedwa ndi inverter pa katunduyo zidzakhalanso zosiyana. Kuchepa kwa mtengo wa DIM, kumachepetsa kutulutsa kwaposachedwa kwa inverter. chachikulu.
Voltage poyambira dera: ENB ikafika pamlingo wapamwamba, imatulutsa ma voliyumu apamwamba kuti iwunikire chubu la backlight la Panel.
PWM controller: Imakhala ndi ntchito zotsatirazi: voteji yamkati, amplifier yolakwika, oscillator ndi PWM, chitetezo cha overvoltage, undervoltage protection, short circuit protection, and output transistor.
Kutembenuka kwa DC: Dongosolo losinthira magetsi limapangidwa ndi chubu chosinthira cha MOS ndi inductor yosungirako mphamvu. Kuthamanga kolowera kumakulitsidwa ndi kankhani-chikoka amplifier ndiyeno amayendetsa chubu cha MOS kuti achitepo kanthu, kuti magetsi a DC azilipiritsa ndikutulutsa inductor, kuti malekezero ena a inductor apeze AC Voltage.
LC oscillation ndi dera lotulutsa: onetsetsani kuti 1600V voteji yofunikira kuti nyali iyambe, ndikuchepetsa voteji mpaka 800V nyali ikayatsidwa.
Mayankho amagetsi otulutsa: Pamene katundu akugwira ntchito, voteji yachitsanzo imabwezeretsedwanso kuti ikhazikitse kutulutsa kwamagetsi kwa I inverter.
(Complex sine wave circuit chithunzi)
Kusiyanitsa pakati pa sine wave inverter ndi inverter wamba ndikuti mawonekedwe ake otuluka ndi mawonekedwe amtundu wa sine wokhala ndi kusokoneza pang'ono, kotero palibe kusokoneza kwa wailesi ndi zida zolumikizirana, phokoso limakhalanso lotsika kwambiri, ntchito yoteteza yatha. , ndipo magwiridwe antchito onse ndi apamwamba.
Chifukwa chinasine wave inverterimatha kutulutsa sinus wave wathunthu chifukwa imagwiritsa ntchito ukadaulo wa SPWM womwe ndi wapamwamba kwambiri kuposa ukadaulo wa PWM.
Mfundo ya SPWM imachokera pa mfundo yofanana yomwe ma pulse amagwira ntchito pazida zogwirira ntchito nthawi: ngati ma pulses akugwira ntchito pazida zogwirira ntchito nthawi, chopangidwa ndi mtengo wapamwamba komanso nthawi yochitapo kanthu ndizofanana, ndipo ma pulse amatha kuyerekezedwa kukhala ofanana.
SPWM imayerekeza mafunde a katatu ndi ma frequency okhazikika komanso mtengo wokhazikika (monga kusintha pafupipafupi 10k) ndi reference sine wave (fundamental wave) wa frequency frequency and voltage, kuti azitha kugunda mphamvu ya DC (kugunda ndi kusintha kwa ntchito) kuti pafupifupi chiwonetsero cha sine wave pa chipangizocho. Matalikidwe ndi ma frequency a reference sine wave amasinthidwa kuti apange mafunde a DC voltage pulse wide modulation mafunde ofanana ndi reference sine wave yokhala ndi matalikidwe osiyanasiyana ndi ma frequency.
Nthawi yotumiza: Feb-05-2024
