LECTURE NOTES ON ELECTRICAL & ELECTRONIC TECHNIQUE

file:///D:/__TCBinh_Laptop_Y0809/_COURSEs_Y0809S1/1_Electrica... LECTURE NOTES ON ELECTRICAL & ELECTRONIC TECHNIQUE By Nguyen Nhu Phong 1. Electric Circuits 2. Electric Machines 3. Electronic devices & systems 4. Small Signal Amplifiers 5. Power Amplifiers 6. DC Signal amplifiers 7. Sine-wave Oscillators 8. Pulse Circuits 9. Digital Circuits 10.Power Supply Circuits About the Lecture notes 1 of 1 9/23/2008 11:53 PM Maïch Ñieän 1/20 KTÑ & ÑT CHÖÔNG 1 MAÏCH ÑIEÄN • Khaùi nieäm. • Caáu truùc maïch ñieän. • Caùc ñaïi löôïng cô baûn. • Doøng ñieän hình sin. • Maïch ñieän 3 pha. GVC. ThS. Nguyeãn Nhö Phong 1999 KTHTCN - ÑHBK Maïch Ñieän 2/20 KTÑ & ÑT KHAÙI NIEÄM CHUNG VEÀ MAÏCH ÑIEÄN • Caùc phaàn töû maïch ñieän. − Nguoàn ñieän: taïo ñieän naêng. − Taûi: eg. Ñoäng cô, beáp ñieän . . . − Phaàn töû trung gian: eg. Ñöôøng daây, bieán aùp. • Caáu truùc maïch ñieän. − Nhaùnh. − Nuùt. − Voøng. − Maét löôùi. • Caùc ñaïi löôïng cô baûn: A i B u − Doøng ñieän: i = dq − Ñieän aùp: − Coâng suaát: − Ñieän naêng: U =UAB =UA −UB P =U × I W = t0 Pdt. t GVC. ThS. Nguyeãn Nhö Phong 1999 KTHTCN - ÑHBK Maïch Ñieän 3/20 KTÑ & ÑT CAÙC PHAÀN TÖÛ MAÏCH A + e U i R iR G uR − B iL iC L uL C iC • Nguoàn aùp: e (V) • Nguoàn doøng: i (A) • Ñieän trôû: R (Ω) UR = R×iR P = R×i2 = U2 • Cuoän caûm: L (H) UL = L× diL WL = 1×LiL • Tuï ñieän: C (F) iC = C× dUC WC = 1×C×UC GVC. ThS. Nguyeãn Nhö Phong 1999 KTHTCN - ÑHBK Maïch Ñieän 4/20 KTÑ & ÑT DOØNG ÑIEÄN HÌNH SIN • Lyù do khaûo saùt. − Baûn chaát hình sin cuûa theá giôùi. − Phaân tích maïch deã daøng. − Naêng löôïng deã saûn xuaát, truyeàn taûi, phaân phoái. • Caùc ñaïi löôïng ñaëc tröng. U Um Usin(ωt) 0 π 2π ωt θ Umsin(ωt+θ) U =UM sin(ωt +θ) =U 2sin(ωt +θ). Um : Taàn soá goùc (rad/s). T : Chu kyø (s) F : Taàn soá (Hz) θ : Goùc pha T = 2π /ω. f =1/T =ω/2μ. −1800 ≤θ ≤1800 GVC. ThS. Nguyeãn Nhö Phong 1999 KTHTCN - ÑHBK ... - tailieumienphi.vn