电机学(Electrical Machinery) - sie.edu.cn

1 (Electrical Machinery) (Electrical Machinery) (Transformers) AC Winding DC Electric Machines I II Induction Machines Synchronous Machines (Electrical Machinery) 1. (Construction) 2. (Equation) (Equivalent Circuit) (Phasor Diagram) 3. Analysis) (Electrical Machinery)

2 (Electrical Machinery) (Fundamental Principles) (Construction) ---- (The Feature of Electric and Magnetic circuit) (Electrical Machinery) 1 10 2 20 10 3 20 4 10 5 20 6 20% 1 2000 2 1998 2 3 1994 4 1997 5 <ELECTRIC MACHINERY FUNDAMENTALS>Stephen Book Company 203 ( 84831)

3 (Electrical Machinery) (Electrical Machinery) (Electric and Magnetic circuit) (Electricaland magnetic Torque and Power) (Energy ) { { { (Generators) (Motors)}}}

4 1 1821 1824 1831 1832 2 1845 1867 1882 3 1876 4 1885 1889 1897 1 2

5 3 200kW 2000kVA 1955 10000kW 1956 12000kW 1958 1960 72500kW 100MW 1959 220kV 120000kVA 6300kW 4500kW 1972 300MW 360000 KVA 600MW 1958 12000kW 4 1 (magnetic flux density) T Br2 (magnetic flux)

6 W B BS = ssdB rrBrSr2/11mWbT=3 (magnetic field intensity) / At/ (permeability) H/ 4 10 7 / 1000 6000 7000 HrHrBr0 0 0 0 4 (magnetomotive force MMF)F , At F NI 5 (reluctance of the magnetic circuit) 1/ At/Wb L mR6 1/ 7 (flux linkage) N m mR ( 1 B H B H 2 B Hc 3 4 1 V Bm n 2 VfBCpnmhh= VBfdCpmee222= 1 (Ampere s law))

7 I1 I2 I3 Hr =lIldHrr ==nkkNIIlH12 (electromagnetic induction) (Faraday s law) N Ф (emf) Ф (Lenz s law) Ф Ф dtdNdtde = = (emf) Ф (motional emf) Ф Blve=3 Ф Ф (self-inductance) iLi =dtdiLdtddtdNeLLL = = =4 1 2 1 2 2 M 1 2 2 1 M (mutual inductance)

8 DtdiMdtddtdNMe1212122 = = =Mi= dtdiMeM21 =12211221121 NNRNNi==M =5 Blif= ( ) ( ) * * / / / / / / tNedd11 =tNedd22 = N1 N2 212121uueeNN 1 2 1

9 2 ( ~ ) 1 NS2 1N 2N kV NU3 A kA 4

10 Y D 1 5 fe 50 6 m 6 7 8 ( )