Electric Machines |
Contents
TRANSFORMERS | 91 |
BASIC PRINCIPLES OF ELECTRIC MACHINES | 179 |
DIRECTCURRENT MACHINES | 265 |
Copyright | |
6 other sections not shown
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3-phase A/Wb air gap angle approximation armature armature current assumed axis circuit of Fig commutator component conductor connected constant core loss cross-section area curve dc machine demagnetization Determine direct current drive electric emf's employed energy Equation equivalent circuit excited ferrite ferromagnetic field current flux density flux linkage frequency full load gmax hysteresis ideal illustrated in Fig increased induction motor inductor leakage leakage inductance magnetic circuit magnetic flux magnetic material magnetic moment magnetic system magnetomotive force magnitude maximum mmf wave N₁ N₂ no-load open-circuit operation output parameters path per-phase phase phasor diagram pole position power factor primary produced r/min R₁ rad/s rated ratio reactance reluctance rotor winding saturation secondary Section shown in Fig single-phase sinusoidal slots stator and rotor stator current stator winding synchronous machine terminal potential difference three-phase torque torus transformer turns V₁ winding resistance zero