﻿GET_GEVOMechL2_09_01_01_06 - ANIMATION Screen
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On ES44AC/DC locomotives, rotational mechanical energy is produced by a GEVO diesel engine.

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Using the alternator, the locomotive converts the engine’s rated 4400 hp into 3.3 MW of electrical power.

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The diesel engine crankshaft is mechanically coupled to the alternator rotor.

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The AA’s field windings are excited by the Auxiliary Alternator Field Controller (AAC) and produce a magnetic field of force.

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As the engine’s mechanical energy turns the rotor, electrical energy is induced into each set of the AA stator windings.

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These three windings produce 3-phase AC voltages that are directly proportional to the field excitation current for a given engine RPM.

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Two of the three output windings, the excitation supply windings and the battery charger supply windings, cable the AC power to the power converter panels where it is converted to DC power.

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The DC power is used to excite both alternators and to recharge the locomotive’s batteries, respectively.

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The third set of output windings, the auxiliary motor supply windings, provides AC power to run seven AC motors on the locomotive.
