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DIRECT CURRENT MACHINES Page 1 Force acting on a Conductor carrying a Current and lying in a Magnetic Field
Generator and Motor Principles
4t E M F in a Rotating LoopAction of Commutator
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50 cycle alternator ampere-turns amps angle anode anode current armature current armature reaction brushes bus-bars Calculate candle-power capacitance cathode cent coil commutator component condenser conductor connected connexion constant copper copper loss core curve decrease direction distribution eddy current effect efficiency Elec electrical electrons energy excitation field circuit field current field resistance filament flux density flux per pole frequency full-load grid heat Hence hysteresis impedance increase induction motor input insulation iron loss lagging lamp leakage magnetic maximum value no-load non-inductive number of turns obtained ohms open-circuit oscillating output phase pole pitch potential power factor primary produced proportional r.m.s. value reactance rectifier reduced resistance loss resultant E.M.F. rotary converter rotating rotor secondary P.D. short-circuit shown in fig shunt sine wave single-phase slip-ring slots stator supply P.D. switch synchronous speed temperature terminal P.D. three-phase torque transformer triode vector diagram voltage volts wattmeter watts winding zero