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AC Electrical Generators - Brown University

BASIC AC Electrical Generators FREE DOWNLOAD (This page left blank intentionally) BASIC AC Electrical Generators TABLE OF CONTENTS Introduction .. 1 Generator Types .. 4 Rotating armature Generator .. 4 Rotating Field 5 Polyphase Generators .. 7 Air Cooled Generators .. 10 Temperature Rise .. 10 11 11 Generator Design and Construction .. 11 Generator Stator and Windings .. 11 Stator Design Hydrogen/Water Cooled Stators .. 17 GENERATOR ROTORS .. 19 Salient Pole Rotors .. 19 Cylindrical Generator Rotor .. 20 Rotor Design Air Cooled 25 Rotor Design Hydrogen/Water Cooled Generators .. 27 Rotor Mechanical Design .. 29 Hydrogen Cooled Generator Stator .. 31 Generator Isolated Phase 33 Standard Generator Seal Oil System .. 35 Standard Generator Stator Cooling Water System .. 43 BASIC AC Electrical Generators Excitation Systems .. 49 Progress Check.

well the armature winding of a generator is cooled has a significant influence on the overall size of a synchronous generator. The cooling of the armature winding is dependent on a number of factors: cooling medium (air, hydrogen, water); insulation thickness; and overall electrical losses (1 2 R + load loss). As Figure 5 illustrates,

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