Electric Machines and Drives |
Common terms and phrases
air gap angle angular approximately armature current axis chopper circuit of Fig coil current commutator machine commutator motor component conductor connected constant core loss current density Determine direct direct current drive effect electric energy equivalent circuit ferromagnetic field current field intensity Figure flux density harmonic hysteresis ignored induction machine induction motor inverter leakage flux leakage inductance linear load current load voltage loop magnetic circuit magnetic field magnetic material magnetic moment magnetizing current magnetizing inductance magnitude N₁ N₂ operating output parameters path permanent magnet permanent-magnet phase currents phasor poles power factor produce r/min R₁ rad/s ratio reactance relation rotating rotor frequency shown in Fig single-phase sinusoidal slots space vector speed speed-torque stator current stator flux linkage stator resistance stator voltage stator winding steady-state switch synchronous machine terminal voltage three-phase thyristors torque transient two-pole V₁ variable-speed drive waveform zero