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BASIC PRINCIPLES OF ELECTRIC MACHINES
8 other sections not shown
3-phase A/Wb air gap angle approximation armature current assumed axis circuit of Fig commutator component conductor connected constant copper loss core loss cross-section area curve dc machine demagnetization Determine direct current drive electric employed energy Equation equivalent circuit ferrite ferromagnetic field current flux density flux linkage frequency full load hysteresis ideal illustrated in Fig impedance increased induction motor inductor input leakage leakage inductance linear loop magnetic circuit magnetic flux magnetic material magnetic system magnetizing reactance magnetomotive force magnitude maximum mechanical mmf wave no-load open-circuit operation output parameters path per-phase phase phasor diagram pole position power factor primary produced r/min rad/s radians rated reactance reluctance rheostat rotor winding saturation secondary Section shown in Fig single-phase sinusoidal slots speed-torque squirrel-cage stator and rotor stator current stator winding supply synchronous machine synchronous speed terminal potential difference three-phase torque torus transformer winding resistance zero