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Windings Currents and Air Gap Magnetomotive Force
Air Gap Magnetomotive Force and Flux Density
An Electric Machine as a Circuit Element
7 other sections not shown
air gap flux air gap mmf air gap width ampereturns amplitude angle applied voltage armature armature current auxiliary phase B-H curve capacitor coil commutator machine conductor constant copper losses Cos[s w t current density denoted effective air gap electric machine electromagnetic torque equal to zero equivalent circuit field current field winding flux linkage frequency fundamental harmonic gap flux density higher harmonics illustrated in Fig induced voltage iron core leakage inductance load machine's magnetic circuit magnetic energy magnetic field magnetomotive force main flux main inductance mmf created mmf distribution mmf drop mutual inductance nonlinear number of turns parameters permeance positive sequence reactance RL circuit rotation rotor current rotor electrical rotor slots rotor speed rotor winding salient pole shown in Fig single phase sinusoidal skin effect spatial harmonic squirrel cage stator and rotor stator current stator phase stator winding symmetrical synchronous machine synchronous speed three phase torque transient vector winding function