Yooj Yim PWM Nrog 555 Hloov Kho Txhua Yam: 5 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:31

Nco tseg: Txhua tus tuaj yeem thov kuv pab. Tsis txhob tawm tswv yim txog kuv qhov kev sau thiab sau ntawv ……. Vim kuv niam lus tsis yog lus Askiv. OK LETS GO thiab kuj plz plz ntsuas kuv cov lus qhia tau zoo Nyob zoo txhua tus. Hnub no kuv ' ll qhia koj yuav ua li cas thiaj ua rau PWM (mem tes dav tes taws los piav) tawm ntawm lub npe nrov heev 555 (lm, tsis muaj leej twg yuav ua) nrog qee qhov lwm qhov offcourse qhov no yooj yim heev thiab nws yooj yim heev yog tias koj xav tswj hwm koj leds, teeb pom kev zoo, servo motor lossis dc lub cev muaj zog (txhuam tsis tau ua haujlwm). Kuv tus pwm tuaj yeem hloov pauv lub luag haujlwm cyle los ntawm 10% mus rau 90% nws ua tsis tau dab tsi ntxiv!

Kauj ruam 1: PWM yog dab tsi

Pulse-width modulation (PWM) ntawm lub teeb liab lossis lub zog siv cuam tshuam nrog kev hloov pauv ntawm nws lub luag haujlwm, kom xa cov ntaub ntawv hla kev sib txuas lus lossis tswj hwm lub zog xa mus rau qhov thauj khoom. Txoj kev yooj yim tshaj plaws los tsim PWM teeb liab yog txoj kev sib tshuam, uas xav tau tsuas yog sawtooth lossis daim duab peb sab waveform (tsim tau yooj yim siv cov oscillator yooj yim) thiab tus sib piv. Thaum tus nqi ntawm cov teeb liab siv (ntsuab sine yoj hauv daim duab 2) ntau dua li cov qauv siv hluav taws xob (xiav), PWM teeb liab (magenta) nyob hauv lub xeev siab, txwv tsis pub nws nyob hauv lub xeev qis tab sis hauv kuv lub pwm Kuv yuav tsis siv tus sib piv.

Kauj Ruam 2: Hom Pwm

Peb hom kev ntsuas qhov dav (pulse-width modulation (PWM)): 1. Lub plawv plawv tuaj yeem kho tau nyob hauv nruab nrab ntawm lub sij hawm lub qhov rais thiab ob sab ntawm lub plawv dhia tau txav los nthuav lossis nthuav dav. 2. Cov txhuas txhuas tuaj yeem tuav ntawm lub qhov rooj txhuas ntawm lub qhov rais thiab tus ntug kev hloov kho. 3. Tail ntug tuaj yeem kho tau thiab ua rau ntug kev hloov pauv. Tree yam ntawm PWM cov cim (xiav): ua rau ntug kev hloov pauv (sab saum toj), taug qab ntug kev hloov pauv (nruab nrab) thiab nruab nrab pulses (ob qho ntug tau hloov pauv, hauv qab). Cov kab ntsuab yog cov sawtooth cov cim qhia siv los tsim PWM cov qauv siv hluav taws xob siv txoj kev sib tshuam.

Kauj Ruam 3: PWM Pab Peb Li Cas ???

Kev xa hluav taws xob: PWM tuaj yeem siv los txo qis tag nrho lub zog xa mus rau lub nra uas tsis muaj kev poob ib txwm muaj tshwm sim thaum lub zog siv hluav taws xob raug txwv los ntawm kev tawm tsam. Qhov no yog vim tias qhov nruab nrab lub zog xa tawm yog sib npaug rau kev hloov pauv lub luag haujlwm. Nrog tus nqi ntsuas kom txaus txaus, lub tshuab lim hluav taws xob tsis zoo tuaj yeem siv los ua kom lub plawv dhia nrawm thiab rov ua qhov nruab nrab qhov sib piv sib xws. Qhov siab PWM lub zog tswj lub tshuab tau yooj yim pom tau nrog cov khoom siv hluav taws xob. Cov xeev sib cais ntawm/tawm ntawm kev hloov pauv tau siv los tswj lub xeev ntawm kev hloov pauv (es) uas sib thooj tswj qhov hluav taws xob hla lossis tam sim no los ntawm kev thauj khoom. Qhov txiaj ntsig tseem ceeb ntawm cov kab ke no yog cov hloov pauv tau thiab tsis ua ib qho tam sim no, lossis nyob rau thiab muaj (qhov zoo) tsis muaj qhov hluav taws xob poob thoob lawv. Cov khoom lag luam ntawm qhov tam sim no thiab qhov hluav taws xob ntawm txhua lub sijhawm tau piav qhia lub zog tawg los ntawm qhov hloov pauv, yog li (hom phiaj) tsis muaj lub zog raug faib los ntawm qhov hloov pauv. Qhov tseeb, cov khoom siv hluav taws xob zoo ib yam xws li MOSFETs lossis BJTs tsis yog cov hloov pauv zoo, tab sis cov tswj kev ua haujlwm tau zoo tseem tuaj yeem tsim tau. ntawm Chav Kawm D lub suab tso suab lossis tswj lub teeb ci thiab ntau lwm yam khoom siv hluav taws xob. Piv txwv li, lub teeb dimmers rau siv hauv tsev ntiav ib yam tshwj xeeb ntawm PWM tswj. Lub tsev siv lub teeb dimmers feem ntau suav nrog cov hluav taws xob hluav taws xob uas cuam tshuam cov dej ntws tam sim no thaum lub sijhawm teev tseg ntawm txhua lub voj voog ntawm AC kab hluav taws xob. Kho qhov ci ci ntawm lub teeb tawm los ntawm lub teeb pom kev yog tom qab ntawd tsuas yog teeb meem ntawm teeb tsa qhov ntsuas hluav taws xob (lossis theem) hauv AC lub voj voog dimmer pib muab hluav taws xob tam sim no rau lub teeb pom kev zoo (piv txwv li yog siv hluav taws xob hloov xws li triac)). Hauv qhov no PWM lub luag haujlwm hloov pauv tau txhais los ntawm qhov zaus ntawm AC kab hluav taws xob (50 Hz lossis 60 Hz nyob ntawm lub tebchaws). Cov yam yooj yim dua ntawm cov dimmers tuaj yeem siv tau zoo nrog inert (lossis qeeb qeeb ua haujlwm) cov teeb pom kev zoo xws li cov teeb roj teeb, piv txwv li, rau qhov kev hloov pauv ntxiv hauv cov khoom siv hluav taws xob uas tau tshwm sim los ntawm cov dimmer ua rau tsis muaj peev xwm hloov pauv ntxiv hauv tso lub teeb. Qee qhov lwm hom teeb pom kev zoo xws li lub teeb ci-emitting diodes (LEDs), txawm li cas los xij, qhib thiab tawm nrawm heev thiab yuav pom tau qhov muag pom yog tias muab nrog qhov qis zaus tsav hluav taws xob. Pom tau qhov cuam tshuam los ntawm qhov ua kom pom lub teeb nrawm tuaj yeem txo qis los ntawm kev nce PWM zaus. Yog tias lub teeb hloov pauv tau nrawm txaus, tib neeg qhov muag pom lub ntsej muag tsis tuaj yeem daws lawv ntxiv thiab lub qhov muag pom lub sijhawm nruab nrab qhov nruab nrab yam tsis muaj flicker (saib flicker fusion threshold). Voltage kev tswj: PWM kuj tseem siv hauv kev tswj hluav taws xob muaj txiaj ntsig. Los ntawm kev hloov qhov hluav taws xob mus rau lub nra nrog lub luag haujlwm tsim nyog, lub zog yuav kwv yees qhov hluav taws xob ntawm qib uas xav tau. Lub suab nrov hloov pauv feem ntau yog lim nrog tus inductor thiab lub capacitor. Koj ib txoj hauv kev ntsuas qhov tso tawm hluav taws xob. Thaum nws qis dua qhov xav tau qhov hluav taws xob, nws tig rau ntawm qhov hloov. Thaum qhov hluav taws xob tso tawm siab dua qhov xav tau hluav taws xob, nws hloov qhov hloov pauv. Variable-speed kiv cua tswj rau cov khoos phis tawj feem ntau siv PWM, vim nws muaj txiaj ntsig ntau dua thaum piv rau lub zog hluav taws xob. kev sib xyaw ua ke, tshwj xeeb tshaj yog kev sib cais ua ke, raws li nws muab lub suab zoo ib yam li hu nkauj lossis ua rau me ntsis tsis sib haum oscillators ua si ua ke. (Qhov tseeb, PWM sib npaug rau qhov sib txawv ntawm ob lub sawtooth ntais. [1]) Qhov sib piv ntawm qib siab thiab qib qis feem ntau yog hloov kho nrog qhov qis zaus oscillator, lossis LFO. tau dhau los ua neeg nyiam. Hu ua "Class-D amplifiers", cov amplifiers no tsim PWM sib npaug ntawm cov teeb liab sib piv uas tau pub rau lub suab nrov ntawm lub tshuab lim tsim nyog txhawm rau thaiv cov neeg nqa khoom thiab rov zoo li qub. Cov amplifiers no yog tus yam ntxwv ua tau zoo heev (e 90%) thiab qhov loj me/lub cev hnyav rau lub zog loj tso tawm. Koj los yav dhau los, PWM daim ntawv nyoos tau siv los rov ua suab PCM cov suab ntawm lub PC hais lus, uas tsuas yog muaj peev xwm ntawm kev tso tawm ob qib suab. Los ntawm kev ua tib zoo ncua sijhawm ntawm lub plhaub taum pauv, thiab los ntawm kev cia siab rau tus neeg hais lus lub cev lim lub zog (txwv cov lus teb tsawg zaus, tus kheej inductance, thiab lwm yam) nws muaj peev xwm kom tau txais kev kwv yees ua si ntawm mono PCM cov qauv, txawm hais tias muaj qhov tsis zoo heev, thiab nrog cov txiaj ntsig sib txawv ntawm kev ua haujlwm. Nyob rau ntau lub sijhawm tsis ntev los no, Kev Ncaj Ncees Ncaj Ncees Digital suab encoding txoj kev tau qhia, uas siv daim ntawv dav dav ntawm kev siv tes taw dav dav hloov pauv hu ua mem tes ntom ntom ntom ntom ntom ntom, ntawm qhov ntsuas siab txaus (feem ntau nyob rau hauv kev txiav txim ntawm MHz) txhawm rau npog tag nrho cov suab nrov ntau yam nrog kev ncaj ncees txaus. Txoj kev no yog siv hauv SACD hom ntawv, thiab kev tsim dua tshiab ntawm cov suab kaw suab yog qhov tseem ceeb zoo ib yam li cov txheej txheem siv hauv chav kawm-D lub tshuab hluav taws xob., nws tuaj yeem siv los ua tus hais lus. Qhov hais lus tau siv hauv Hi-Fi lub suab li tweeterCOOLLLL txoj cai?

Kauj Ruam 4: Yam Koj Yuav Tsum Tau

vim nws yog ib qho yooj yim ib ntu Circuit koj yuav tsis xav tau ntau part1. NE555, LM555 lossis 7555 (cmos) 2.two diodes 1n4148 tau rov hais dua tab sis koj tseem tuaj yeem siv 1n40xx series diodes3.100k lauj kaub (ntim ntim ntim tau zoo rau qhov no Circuit) 4.100nf ntsuab cap 5.220pf ceramic cap6.breadbord7.power transistor Yooj yim txoj cai?

Kauj Ruam 5: Tsim Nws $$$$

Tsuas yog ua raws daim duab thiab muab txhua ntu tso rau ntawm daim ntawv qhia zaub mov. Koj tshuaj xyuas txhua yam ob zaug ua ntej koj qhib lub zog. Yog tias koj xav tsav tsheb kom muaj txiaj ntsig thiab tswj lub teeb ci ntawm lub teeb ci lossis lub cav koj tsuas tuaj yeem tso lub zog transistor rau nws tawm. tab sis yog tias koj tsuas xav tau tsav lub teeb ci lossis lub cev muaj zog kom zoo tshaj qhov ntsuas qhov siab tshaj 2200uf tau pom zoo yog tias muab lub hau no thiab tsav lub cev muaj zog ntawm 40% lub luag haujlwm cyle ces koj lub cav yuav 60% ua haujlwm ntawm yuav luag zoo ib yam thiab tib yam torque. Go tsim nws tam sim no muaj ob daim vis dis aus.koj tuaj yeem saib yuav ua li cas pwm ua haujlwm.thiab kuv pwm ua haujlwm tiag tiag nrog rau ib qho op amp1. koj tuaj yeem pom lub kiv cua pib tig 1/2 vib nas this ces pib tig rau 90 % lub luag haujlwm voj voog 2. koj tuaj yeem pom cov leds ntsais zoo li lub ntsais ntawm lub tsheb nws yog ntawm 80 % kev ua haujlwm P. S: plz plz tus nqi qhia no nrog kev ntaus nqi siab dua. Kuv tsuas yog 15 xyoos. Good-byemy cov lus qhia tom ntej yuav yog tus hais lus arc nrog pwm