Many people confuse motor phase with electrical voltage phase. Despite the same terminology, these are different things.

A three-phase motor differs from a two-phase motor in that it has a smaller swivel angle. These motors are usually put on laser machines to achieve greater accuracy. A two-phase motor is more powerful, so they are used on milling machines.

Am I right or there are another differences?

No such thing as two phase. Single phase or 3 phase for normal residential or commercial. Single phase motors are either universal or inductance. Inductance motors come in many flavors. 3 phase motors are more for industrial purposes and can be easier to control with a VFD. By varying the frequency of the VFD you can vary the RPM of the motor. Something that's not easily done with a single phase inductance motor.

Your laser motor description sounds like a step motor.

Three-phase electricity is three phase lines, and the voltage between the three lines is 380v, which is used for three-phase power supply equipment, such as three-phase motors; two-phase electricity is two phase lines, and the voltage between the lines is also 380v, generally AC Welders are used more; single-phase electricity is composed of a phase line and a zero line, and the voltage is 220v, which is mainly used for household appliances.

Thanks for the feedback!

Two-phase motors are inferior to three-phase motors in pitch accuracy, but this can be compensated for by crushing the motor pitch. They are also cheaper than three-phase motors. Two-phase stepper motors are mostly mounted on heavy and massive machine assemblies. If we apply pitch splitting to a three-phase motor, it will be even more accurate, which will be very useful when doing detailed engraving.

My first reaction was to echo LeoG and say there is no such thing as a two-phase motor. People often confuse the name single phase with that. However since others did not say the same thing I did a little investigation and came up with the following:

https://clr.es/blog/en/single-phase-two-phase-three-phase-motors/ >It seems that once upon a time there were two phase motors so the original poster could indeed be looking at such a thing. According to the above article they were dual voltage motors.

In the modern world though I would still say that the terms are 3-phase and single-phase. My experience is that 3-phase motors are less expensive than single phase in a direct horsepower comparison.

The primary reason to use a 3-phase motor is that you are splitting the voltage and current draw between 3 legs instead of a single leg on a single phase motor, where the current goes out on the line leg and returns to ground on the neutral. In the 3-phase motor the outflow current is split into 3 separate legs. That makes for less current required for each leg to handle, and subsequently, a smaller gauge wire can be used.

BH Davis

I've heard of split phase motors myself

split phase motors ?? Interesting

"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.

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.

They work by using a three-phase power source. They are driven by three alternating currents of the same frequency, which peak at alternating moments. They can have a power of up to 300KW and speeds ranging between 900 and 3600 RPM.

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

Three-phase electric power is the most common method in use in electric grids around the world since it transfers more power, and it sees significant use in the industrial sector."

I think this may be helpful.

https://clr.es/blog/en/single-phase-two-phase-three-phase-motors/