L13_A
Direct- Current Machine
Fig 3.29 Tweleve- slot rotor for a dc machine, as seen from the commutator end.
Fig 3.32 Salient- pole structure for a dc machine
Fig 3.30 Twelve- slot rotor winding for a dc machine
Fig 3.31 Magnetomotive force distribution for the machine of Figs 3.29,30

L13_B
Wound machine v.s. Permanent Magnet (PM) machine
Mechanical angle v.s. Electrical angle
Generator Action
AC- generator
DC- generator
Multipole Machines