How to choose between AC and DC motors?

The construction of these two types of engines is different.

The most fundamental difference is the power supply: alternating current (single-phase or three-phase) and direct current (DC/DC), such as for batteries.
Speed ​​is another sign of differentiation. The speed of a DC motor is controlled by changing the voltage in the motor, while the speed of an AC motor is controlled by changing the frequency. The most common is to use a variable frequency drive.
1. AC motor:

AC motors are the most popular motors in the industry because of several advantages:

The structure of the AC motor is very simple
Because it consumes less when starting, it is more economical.
It is also stronger and therefore usually has a longer life.
Almost no maintenance
Since its operation involves the synchronization of the rotor rotation with the frequency of the current, the speed of the AC motor remains unchanged. This makes them particularly suitable for applications that require continuous movement and few gear changes. Pumps, conveyors and fans are ideal applications for this type of motor.

If used with gearboxes, they can also be integrated into systems that do not require high precision.

However, the speed control function makes them more expensive than other engines.

AC motors are divided into two series: single-phase and three-phase motors.

The difference between single-phase motors is:
Electric power (unit: kilowatt), determines the torque
The number of poles gives the speed of rotation
Installation method: flange (B14, B5) or pedal (B3)
efficient
Industry is weaker because of weaker power
It may be used in the domestic power grid.
The difference between three-phase motors is:
A structure that can provide much higher electric power than single-phase voltage motors
Use in industrial environments (approximately 80%)
Used in infrastructure and equipment for high electrical power.