The most basic differences between AC series excitation motors and DC motors:

The power supply is different: AC series motors use single-phase or three-phase alternating current, while DC motors use direct current, such as batteries.

Different speeds: The speed of an AC series motor is controlled by changing the current in the motor, whereas the speed of a DC motor is controlled by changing the frequency, usually with an inverter. Therefore, AC general-purpose motors rotate faster than DC motors.

AC series-excited motors run with their rotor and current frequencies synchronised, and their speed can remain constant for a long time. Therefore, AC series-excited motors are particularly suitable for applications requiring continuous motion and few gear changes, and are widely used in household appliances, medical rehabilitation equipment and power tools, etc. They have several advantages.

Simple structure, easier to manufacture;

Lower starting energy consumption, more economical;

A more robust and durable structure and therefore usually has a longer lifespan;

Virtually maintenance-free, saving on maintenance costs.

Ideally suited to dynamic applications requiring high precision and less suitable for applications requiring high power, DC motors are widely used in domestic appliances, healthcare, automotive and industrial applications and have the following significant advantages:

High starting torque;

Easy to install;

Accurate and fast, starting, accelerating and stopping very quickly;

Simple speed control, by varying the supply voltage only.