INDEX-2 Dc motors—Continued counter emf, 2-3, 2-4 direction of rotation, 2-9 drum-wound armature, 2-8 Gramme-ring armature, 2-7, 2-8 manual and automatic starters, 2-11 motor loads, 2-4 motor speed, 2-9 practical dc, 2-4 to 2-7 principles of operation, 2-1 to 2-3 series dc, 2-4, 2-5 shunt, 2-5, 2-6 summary, 2-11 to 2-14 types of armatures, 2-7, 2-8 Drum-type armatures, 2-7 Drum-wound armature, 2-8 E Eddy current losses, 1-12, 1-13 Electromagnetic poles, 1-7 F Field excitation, 1-15, 1-16 Frequency, ac generators, 3-13, 3-14 G Generator construction, 1-19 to 1-21 Generators, classification of, 1-16 to 1-19 compound-wound, 1-17, 1-18 series-wound, 1-16 shunt-wound, 1-17 Glossary, AI-1 to AI-4 Gramme-ring armature, 1-13, 1-14, 2-7, 2-8 H Hysteresis losses, 1-13 I Induction motors, 4-8 to 4-15 shaded-pole, 4-13, 4-14 single-phase, 4-10, 4-11 speed of single-phase, 4-14, 4-15 split-phase, 4-11 to 4-13 L Learning objectives, 1-1, 2-1, 3-1, 4-1 ac generators, 3-1 to 3-4 ac motors, 4-1, 4-2 dc generators, 1-4, 1-5 dc motors, 2-1 to 2-3 M Motor loads, dc motors, 2-4 Motor reaction in a generator, 1-10, 1-11 Motor speed, dc motors, 2-9 P Parallel operation of generators, 1-23 Prime movers, 1-11, 3-6 R Rotating-armature alternators, 3-2, 3-3 Rotating-field alternators, 3-3, 3-4 Rotating magnetic fields, 4-3 rotor behavior in a rotating field, 4-6, 4-7 three-phase, 4-5, 4-6 two-phase, 4-3 to 4-5 Rotation, direction of, dc motors, 2-9 S Series ac motor, 4-2, 4-3 Series dc motor, 2-4, 2-5 Series-wound generator, 1-16 Shunt-wound generators, 1-17 Single-phase alternators, 3-7, 3-8 Single-phase, induction motors, 4-10, 4-11 shaded-pole, 4-13, 4-14 speed of single-phase, 4-14, 4-15 split-phase, 4-11 to 4-13 Shunt motor, 2-5, 2-6 Starters, manual and automatic, dc motors, 2-11 Synchronous motors, 4-7, 4-8 T Three-phase alternator, 3-10 to 3-13 three-phase connections, 3-11 to 3-13 Three-phase rotating field, 4-5, 4-6