The maximum current that can be supplied by the alternator depends upon the
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The maximum current supplied by the alternator depends upon the speed of exciter
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The maximum current that an alternator can supply is determined by the greatest heating loss (I2R power loss) that can be tolerated in the armature as well as the maximum heating loss in the field.
- An alternator's armature current fluctuates depending on the load.
- This is similar to how DC generators work. Lagging power factor loads, on the other hand, tend to demagnetize an alternator's field, and terminal voltage can only be maintained by raising the DC field current in AC generators.
- As a result, alternating current generators are frequently rated in terms of kVA, power factor, phases, voltage, and frequency.
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