Mabda'a jilitaanka PWM (PWM) ayaa loo yaqaan muddo dheer, laakiin codsatay in nidaamyada kala duwan waxa ay noqotay dhawaan. Waa muhiim u ah qalab badan oo loo isticmaalo beeraha kala duwan: uninterruptible kala duwan korontada, converters noqnoqoshada, xeerka danab, converters inta jeer ee hadda ama shaybaarka xawaaraha, iwm Waxa si fiican loo xaqiijiyay in suuqa baabuurta iyo in wax soo saarka sida xubin ka mid ah loo xakameeyo howlgalka labadaba adeegga iyo matoorrada awood badan. xakamaysada PWM ayaa si fiican u shaqeeyay markii hawlgala ee wareeggeedii kala duwan.
Ina keena aynu baaro qaar ka mid ah tusaalayaal la taaban karo oo muujinaysa sida ay u qabsato xawaaraha baabuurta by wareeggeedii electronic, taas oo ka mid ah xakamaysada PWM ah. Ka soo qaad in aad u baahan tahay in la beddelo xawaaraha baabuurta ee nidaamka kuleylka gudaha baabuurka. horumar waxtar leh oo ku filan, miyaanay ahayn? Gaar ahaan xilli off, markii mid ka mid ah uu doonayo in uu xeeriyo heerkulka gudaha si tartiib tartiib ah. DC motor ku rakiban in nidaamka this, waxay suuro gelineysaa in la beddelo dardarta, laakiin waxaa lagama maarmaan ah in ay saamayn ay EMF. Iyada oo taageero ka xubno ka elektaroonik ah oo casri ah in xilsaarayaa fududahay in la dhammayn. Ujeedada this, circuit korontada ah ee engine jirsado FET xoogga. Maamushaa, aad u-sarcaadka, PWM gacanta ku xawaaraha. waxaa la, waxaad bedeli kartaa xawaaraha baabuurta ee aad u ballaaran.
Sidee circuit gacanta PWM ee AC ah? Xaaladdan oo kale, circuit a control xoogaa kala duwan, laakiin mabda'a ka hawlgala isku mid. Tusaale ahaan, fikiraan waxyaalihii ay Converter soo noqnoqoshada. aaladaha noocan oo kale ah waxaa si ballaaran loo isticmaalo in wax soo saarka sharci u xawaaraha engine. Si aad u bilowdo danab saddex waji la saxo via buundo Larionov iyo qayb smoothed. Oo kaliya ka dibna quudin jiray in ay transistors field-saamayn awood shirka bipolar ama module-ku-saleysan. Kontaroolada waa danab xakamaysada PWM, ururiyay ku saleysan microcontroller ah. Wuxuu abuuraa digir ah ay gacanta ku, width iyo inta jeer ee lagama maarmaanka u ah formation of xawaare motor gaar ah.
Nasiib darro, marka lagu daro qaab ciyaareedka wanaagsan ee codsiyada halkaas oo ay gacanta ku PWM yahay sida caadiga ah u muuqan faragelin xoog wareegi xoogga. Tan waxa u sabab joogitaanka inductance ee windings ee matoorrada korontada iyo line laftiisa. Dhibtoonayo schematics kala duwan this: dejinta xowli ah awooda badan wareeggeedii AC ama siin diode free-riixi ay barbar motor ee korontada DC.
wareeggeedii noocan oo kale ah ku kala duwan yihiin isku haleynta ku filan sare ee hawlgalka iyo waa cusub oo duurka ku of control koronto kala duwan. Waxay yihiin is haysta oo ku filan oo si fiican u maamula. beddelka dhawaan qalabka hubkaas ayaa loo isticmaalaa in wax soo saarka.