The difference Bettween 1-phase, 2-phase and 3-phase Motor

What is a single-phase motor?
A single-phase motor is an electrically-powered rotary machine that can turn electric energy into mechanical energy.

What is a two-phase motor?
A two-phase motor is a system that has two voltages 90 degrees apart, which is no longer in use nowadays. The alternator is composed of two windings placed at 90 degrees from each other.

They require 2 live and one ground wire that work in two phases. One increases the current up to 240v for the motion, and the other one maintains the fluidity of the current for the use of the motor.

What is a three-phase motor?
A three-phase motor is an electric machine that transforms electric power into mechanical energy by means of electromagnetic interactions. Some electric motors are reversible – they can transform mechanical energy into electric power acting as generators.

Three conductor lines are used for transmission, but the final use requires 4-wire cables, which correspond to the 3 phases plus neutral.


Differences between a single-phase motor and a three-phase motor
First, we need to differentiate the type of installation and the current that flows through it. In this regard, the difference between single-phase current and three-phase current lies in that single-phase current is transferred over a single line. In addition, since there is only one phase or alternating current, the voltage does not vary.

Single-phase motors are used when a three-phase system is not available and/or for limited power – they are generally used for powers under 2 Kw or 3 Kw.
Three-phase motors commonly see more use in industry, since their power is over 150% greater than that of a single-phase motor, and a three-phase rotating magnetic field is generated.

While running a single-phase motor can be noisy and generate vibrations, three-phase motors are more expensive, but they do not generate these vibrations and are less noisy.