How many phases does a single-phase alternator have?

A single-phase alternator generates electricity from a single alternating current waveform. This means that it operates with one set of windings or coils that produce a single voltage output. In this configuration, the alternator produces electric power with one alternating current phase characteristic, which is sufficient for specific applications, especially in smaller residential or light commercial electrical systems.

In contrast, multi-phase alternators, such as three-phase alternators, utilize multiple sets of windings to produce multiple waveforms, enhancing efficiency and power distribution. However, a single-phase alternator is designed explicitly for situations where only one phase of power is needed, confirming that it has only one phase of operation.