Comparison of Single Phase vs Three Phase Motors

Single Phase Motors Three Phase Motors
Can be operated anywhere as Single phase supply is Widely Available Can be used only when three phase supply is available.
Efficiency is lower as a single winding has to carry all the current. Efficiency is Higher as Three windings carry the current
Torque is not uniform Torque is uniform
Larger in Size for the same kW rating Smaller in Size
Cost is cheaper at the fractional kW range due to high volume of production Cost is higher at low kW range.
Cost is higher at high kW ratings Cost is cheaper at lower kW range.

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