Dab tsi yog inverter?
Lub inverter hloov DC fais fab (roj teeb, roj teeb cia) rau hauv AC zog (feem ntau 220V, 50Hz sine yoj). Nws muaj inverter choj, tswj logic thiab lim circuit.
Yooj yim muab, lub inverter yog ib qho khoom siv hluav taws xob uas hloov hluav taws xob tsawg (12 lossis 24 volts lossis 48 volts) ncaj qha tam sim no rau hauv 220 volts hloov tam sim no. Vim tias peb feem ntau siv 220-volt alternating tam sim no rectifier tig nws mus rau tam sim no ncaj qha, thiab lub inverter ua nyob rau hauv qhov kev taw qhia, yog li lub npe.
Dab tsi yog asine yoj inverter
Inverters tuaj yeem raug cais raws li lawv cov zis waveforms, a. muab faib ua square wave inverters, b. hloov yoj inverter thiab c. sine yoj inverter.
Yog li ntawd, lub ntsiab lus ntawm sine wave inverter yog ib qho inverter uas nws cov zis waveform yog sine yoj.
Nws qhov zoo dua yog tias cov zis waveform yog qhov zoo, qhov cuam tshuam tsawg heev, thiab nws cov zis waveform yog qhov yooj yim raws li AC waveform ntawm daim phiaj loj. Qhov tseeb, qhov zoo ntawm AC lub zog muab los ntawm qhov zoo heevsine yoj inverteryog siab tshaj ntawm daim phiaj. Lub sine yoj inverter muaj kev cuam tshuam me me rau hauv xov tooj cua, khoom siv sib txuas lus thiab cov khoom siv precision, tsis tshua muaj suab nrov, muaj zog load adaptability, tuaj yeem ua tau raws li daim ntawv thov ntawm tag nrho cov AC loads, thiab tag nrho lub tshuab muaj kev ua haujlwm siab; nws qhov tsis zoo yog tias cov kab thiab cov txheeb ze kho yoj inversion Lub inverter yog complex, muaj cov kev xav tau siab rau kev tswj cov chips thiab cov cuab yeej tu, thiab yog kim.
Nws ua haujlwm li cas?
Ua ntej qhia txog lub hauv paus ntsiab lus ntawm kev ua haujlwmsine yoj inverter, ua ntej qhia lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm lub inverter.
Lub inverter yog ib tug DC rau AC transformer, uas yog tiag tiag ib tug txheej txheem ntawm voltage inversion nrog lub converter. Lub converter hloov AC voltage ntawm daim phiaj fais fab mus rau qhov ruaj khov 12V DC tso zis, thaum lub inverter hloov 12V DC voltage tso zis los ntawm Adapter rau hauv high-frequency high-voltage AC; ob qho tib si kuj tseem siv cov txheej txheem pulse width modulation (PWM) ntau dua. Nws cov ntsiab lus tseem ceeb yog PWM kev tswj hwm kev sib koom ua ke, Adapter siv UC3842, thiab inverter siv TL5001 nti. Kev ua haujlwm voltage ntau ntawm TL5001 yog 3.6 ~ 40V, thiab nws tau nruab nrog qhov yuam kev amplifier, lub regulator, oscillator, PWM generator nrog rau qhov chaw tuag, kev tiv thaiv hluav taws xob tsawg thiab luv luv tiv thaiv Circuit Court.
Input interface ib feem: Muaj 3 lub teeb liab nyob rau hauv lub tswv yim, 12V DC input VIN, ua hauj lwm pab voltage ENB thiab vaj huam sib luag tam sim no tswj teeb liab DIM. VIN yog muab los ntawm Adapter, ENB voltage yog muab los ntawm MCU ntawm lub motherboard, nws tus nqi yog 0 los yog 3V, thaum ENB = 0, lub inverter tsis ua hauj lwm, thiab thaum ENB = 3V, lub inverter nyob rau hauv ib txwm ua hauj lwm lub xeev; Thaum DIM voltage Muab los ntawm lub rooj tsav xwm tseem ceeb, nws qhov kev hloov pauv yog nyob nruab nrab ntawm 0 thiab 5V. Qhov sib txawv DIM qhov tseem ceeb yog pub rov qab mus rau lub tswv yim davhlau ya nyob twg ntawm PWM maub los, thiab tam sim no muab los ntawm inverter rau lub load kuj yuav txawv. Qhov me dua tus nqi DIM, qhov me dua qhov tso zis tam sim no ntawm lub inverter. loj dua.
Voltage startup circuit: Thaum ENB nyob rau theem siab, nws outputs high voltage kom teeb lub vaj huam sib luag lub backlight raj.
PWM maub los: Nws muaj cov haujlwm hauv qab no: sab hauv siv voltage, yuam kev amplifier, oscillator thiab PWM, overvoltage tiv thaiv, undervoltage tiv thaiv, luv luv Circuit Court tiv thaiv, thiab tso zis transistor.
DC hloov dua siab tshiab: Kev hloov hluav taws xob hloov hluav taws xob yog tsim los ntawm MOS hloov raj thiab lub zog cia inductor. Lub input mem tes yog amplified los ntawm lub laub-rub amplifier thiab ces tsav lub MOS raj los ua switching action, thiaj li hais tias DC voltage tsub nqi thiab tso tawm inductor, thiaj li hais tias lwm kawg ntawm inductor tau txais AC Voltage.
LC oscillation thiab tso zis Circuit Court: xyuas kom meej 1600V voltage xav tau rau lub teeb pib, thiab txo qhov voltage mus rau 800V tom qab lub teeb pib.
Tso zis voltage tawm tswv yim: Thaum lub load ua hauj lwm, lub sampling voltage yog pub rov qab rau stabilize qhov voltage tso zis ntawm lub inverter.
(Complex sine wave circuit diagram)
Qhov sib txawv ntawm sine yoj inverter thiab cov inverter zoo tib yam yog tias nws cov zis waveform yog ua tiav sine yoj nrog qis distortion tus nqi, yog li tsis muaj kev cuam tshuam rau cov khoom siv hauv xov tooj cua thiab kev sib txuas lus, lub suab nrov kuj tseem tsawg, kev tiv thaiv ua tiav. , thiab tag nrho efficiency yog siab.
Yog vim li cassine yoj invertertuaj yeem ua tiav sine yoj yog vim nws siv SPWM thev naus laus zis uas yog siab tshaj PWM thev naus laus zis.
Lub hauv paus ntsiab lus ntawm SPWM yog raws li lub hauv paus ntsiab lus sib npaug uas pulses ua raws li lub sijhawm ua haujlwm: yog tias cov pulses ua raws lub sijhawm ua haujlwm, cov khoom ntawm cov nqi ncov thiab lub sijhawm ua haujlwm sib npaug, thiab cov pulses tuaj yeem kwv yees kom sib npaug.
SPWM piv cov duab peb sab yoj nrog cov zaus ruaj khov thiab cov nqi siab ruaj khov (xws li hloov zaus 10k) nrog rau kev siv sine yoj (yoj hauv paus) ntawm qhov sib txawv thiab qhov hluav taws xob, thiaj li ua rau pulse DC voltage (mem tes nrog lub luag haujlwm hloov pauv) kom kwv yees siv sine yoj ntawm lub cuab yeej. Lub amplitude thiab zaus ntawm kev siv sine yoj raug kho kom tsim DC voltage pulse width modulation nthwv dej sib npaug rau qhov siv sine yoj nrog sib txawv amplitudes thiab frequencies.
Post lub sij hawm: Feb-05-2024
