## Design of alternating-current machines |

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### Contents

THE GENERAL VOLTAGE EQUATION | 1 |

Rotor current Maximum torque | 7 |

V | 11 |

12 other sections not shown

### Common terms and phrases

3-phase winding air gap alternator ampere ampere-turn ratio amplitude amps armature bolts calculation cent centimetres coefficient coil groups coil sides coil span conductors per slot considered copper core curve diameter distribution factor dovetail e.m.f. wave eddy currents effect electrical equal excitation field coils field form figure flux density Friction and windage full-load full-pitch coils fundamental gap density increase induction motors insulation iron loss laminations leakage flux lines per sq load magnetic circuit magnetomotive force main flux method metres per sec Miles Walker number of conductors number of pole number of slots open slots permeance phase pole pairs pole pitch pole shoe power factor radial reactance rotor body salient-pole machines saturation shaft short circuit shown in Fig sine wave slot pitch slots per pole space stator steel stress synchronous condenser teeth tion tooth turbos usually vector diagram voltage volts width