[0:00]Hello everyone, aaj start karenge hum apna ek naya topic jiska naam hai single phase induction motor. Ye bahut hi zyada important topic hai aur ye aksar AKTU me repeat hota rehta hai. Toh start karte hain without wasting our time. Pehla sabse pehla part hai isme construction hum discuss karenge aur phir working aur phir applications iske. theek hai toh dekhiye start karte hain iske sath single phase induction motor me. Toh sabse pehla hai hamara construction toh construction kya hota hai? Construction matlab ki uske parts kaun kaun se hain? Toh sabse pehle hamare paas aata hai isme stator. Toh stator kya hota hai jo stationary unit hoti hai, that is the carry the single phase winding. Ye single phase winding ko carry karti hai aur ye stationary unit hai. Ab jitne bhi topics aayenge wo zyada tar theory wale hain toh usme aapko theory strong karni hai. Toh wahan pe hum sirf samjhane ka aapko role play karenge aur baaki jo theory ka section hai wo aap video se apne notes prepare karke aap unhe pad sakte hain. Toh start karte hain phir carry single toh stator kya karta hai hamara carry karta hai single phase winding ko aur ye ek stationary unit hai. Naam se pata lag raha hai stator, that means stationary unit. theek hai. Similarly hamare paas ek aur unit hoti hai rotor, that is the rotor unit, that is the carry the rotor winding. Toh ye single phase winding ko carry karti hai, ye rotor winding ko carry karti hai. Ye hamari rotating unit hai and which is normally squirrel cage. Ab ye squirrel cage kya hota hai? Iske liye agar aap hamara three phase induction motor ka video dekhiyega. Usme humne aapko do type ki rotor construction samjhayi hain. Pehli hai squirrel cage induction motor aur doosri hoti hai hamari phase wound induction motor. theek hai in dono ko aapko dekhna hai ek baar us video se jaake dekh lijiyega agar aapko nahi pata. Baaki toh phir start karte hain iske sath matlab iske aage badhte hain. Toh dekhiye jab hum ab hamari working ab matlab jo hamara iska thoda sa concept hai construction ka wo samjhiye. Toh when the AC single phase supply, jab AC ki single phase supply connect karte hain hum stator se kyunki humne bata diya ki carry single phase winding toh isko jab hum connect karte hain AC ki single phase supply ko connected with stator winding, it produces single phase pulsating flux means sinusoidal flux. Ab ye sinusoidal jaise aapko pata hai ki agar hum current ki baat karen toh current hamara is tarike se travel karta hai, positive, negative, positive, negative is tarike se hamara jo hamara graph banta hai alternating AC current ka. Toh wo is tarike se hota hai plus, minus, plus, minus. Toh is tarike se hamare plus minus plus minus kya karte hain, flux jo hai wo generate hota hai ek sinusoidal flux, sinusoidal current generate hota tha. Toh yahan pe hamara pulsating toh wohi hai yahan pe sinusoidal flux generate ho raha hai jise humne bol diya single phase pulsating flux. theek hai toh kya ho raha hai ki jab hamara AC single phase jab humna AC ko AC ki jo single phase supply thi use humne connect kara stator se toh hamare ko kya mila ek single phase pulsating flux mila jise humne sinusoidal flux bhi bol sakte hain theek hai. Ab dekhiye start karte hain ussi ke aage se next working principle iska toh jab maine aapko bataya ki pulsating flux produce hota hai stator jab connected hota hai, theek hai. Stator jo hai jab single phase supply se connected hota hai AC ki, theek hai. Toh ab kya ho raha hai toh when the pulsating flux linking with the rotor conductor tab ye produce karta hai torque due to Faraday's law. theek hai ye Faraday's law ke anusar ek hamara torque jo hai wo produce karta hai.
[2:44]Toh when the positive portion of flux jaise ki maine abhi aapko bataya ki hamara current jaise positive negative travel karta hai is tarike se ye theek hai toh ye jo wave hai isme kuch positive portion hai kuch negative hai, ye positive bol diya aur ye negative bol diya. theek hai. Toh yahan pe kya ho raha hai it produces the forward torque jo positive portion of flux linked with the rotor conductor, it produces forward torque in one direction. And negative portion of flux produces torque in opposite direction as backward torque. Similarly hota kya hai continuous forward and backward torque lagte hain act in opposite direction as back in very small duration of time. Hence due to moment of inertia, rotor will not rotate in any direction and starting torque of rotor is zero. Single phase induction motor is not self rotating motor. Kyunki wohi baat ho gaya ki maan lijiye main is pen ko ek baar rotation de raha hoon is tarike se aur ek baar is tarike se aur baar baar again and again main ise rotation de raha hoon toh ek time aisa aayega ki jab ye rotate hi nahi karega, ye ruk jayega. theek hai toh bas wohi hai hence due to moment of inertia rotor will not rotate in any direction and the stationary and the starting torque of the rotor is zero. Aise mein kya ho jayega jo hamara starting torque hai uska kya ho jayega zero ho jayega kyunki torque starting torque ka matlab kya hua ki wo cheez start nahi ho pa rahi hai toh starting torque iska kya ho gaya zero ho gaya. Hence single phase induction motor is a not self-starting motor. theek hai bas aapko ye likh ke aa jaye agar aapko 2 marks mein aata hai. theek hai aur ye kyun ho raha hai kyunki iski explanation toh ye pura ka pura paragraph hai jo aapko likh sakte hain aap apne notes copy mein theek hai.
[4:11]Aage start karte hain hum iske starting methods ke sath. Ab dekhiye starting methods mein kya hota hai? Starting method of single phase induction motor. Toh starting matlab ab ho kya raha hai ki single phase ka starting torque hi zero hai. Starting torque zero hai dekhiye maine likha na ki single phase induction motor is not self starting kyunki starting torque of rotor is zero.
[4:32]Ab isko hum kaise not equals to zero banaye? Kaise hum τs ko not equals to zero banaye ki jis se wo motor hamari chal jaye. Toh ye hamara main motive hota hai starting methods ka. Toh isme hamara sabse pehla method hota hai by applying the external force in any direction. Wohi baat hai ki maan lijiye ye pen hai aur main iske upar koi bhi ek direction mein force lagaun toh ye ussi direction mein rotate karna chalu kar dega toh bas wohi hai ki by applying the external force in any direction which produces the starting torque in the direction of external force. Jaise ki maine is is pen ko ghumaya toh is is pen ne clockwise direction mein ghoomna start kar diya toh hence toh wo hamara jo direction hai wo kis kis kon determine karega? External force jo laga hai us par wohi determine karega jaise ki is pen pe hua. theek hai. Toh by applying the external force in any direction which produces the starting torque in the direction of external force. Second method hamara hota hai by using the starting or auxiliary winding. Ye bahut hi zyada important method hai aur ishi ke upar based hamari classification ho gayi hai. theek hai kiski? Ishi ki single phase induction motor ki hamari classification ho gayi hai ki kis kis type mein starting or auxiliary winding connect kari gayi hain. theek hai toh wo bhi video hamara iske iske baad aayega aur wo bahut important hai. theek hai start kyunki hota kya hai ye question is tarike se ban ke aata hai ki define the single phase induction motor about it construction and working principle and also write the starting methods explain any two methods in detail is tarike se aata hai toh uske upar bhi hamara ek video aayega wo short short sa video hoga.
[6:58]Usme sirf concept ke upar hum baat karenge usme theek hai I hope aapko ye video samajh mein aa gaya hoga koi doubt ho toh comment section mein aap pooch sakte hain. Aaj ke liye itna hi, thanks for watching, have a nice day.
