Voltage generation in three-phase synchronous machine generator
The rotor of the alternator is Run at proper speed by its Prime mover. A prime mover is a machine that supplied the mechanical energy input to the alternator. The primers movers used for slow and medium-speed alternators are water wheels or hydraulic turbines. Steam and gas turbines are used as prime movers in the large alternators and run at high speeds. Steam turbine-driven alternators are called Turbo alternators are Turbo generators. As the pole of the Rotor moves under the armature conductors on the stator, the field flux cut the armature conductor. Therefore voltage is generated in this conductor. Voltage is of an alternating nature since poles of alternate polarity successively pass by a given stator conductor. A three-phase alternator has a stator with three sets of windings arranged so that there is a mutual phase displacement of 120 degrees these windings are connected in Star to provide three-phase output.
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