Page:Electrical Engineering Volume 2.djvu/13

 CONTENTS.

. Page. Factors Limiting Output - - - - - 2391 Heating of Machine -- 2391 Speed of Armature -- 2395 Heating of Field Spools 2395 Armature Reaction: Smooth Core - - - 2397 Current Density in Armature Conductor - - 2415 Armature Reaction: Slotted Core - - - 2415 Armature Reaction: Constant-Current Dynamos 2419 Magnetic Densities -- 2421 Calculation of Field Ampere-Turns - - - 2423 Design of 12-Horsepower Dynamo - - - 2426 Characteristic Curves -- 2449 Efficiency - - - -. - . 2457 Mechanical Construction - - - - - 2468 Connection Diagrams -- 2513 Assembled Machines -- 2515

. Principles of Operation. - - . . 2517 Dynamos and Motors Compared - - - - 2518 Action of Motor - - - -. - - - 2519 Classes of Motors -.---.- 2529 Shunt Motors - - - - - - - 2530 Series Motors --- 2533 Differentially Wound Motors - - - - 2539 Starting Rheostats -- 2540 Automatic Switches -- 2544 Series-Motor Connections - 2545 Regulating Rheostats -- 2546 vii