Difference Between AC and DC Motor

The difference between AC and DC motors is very important not only from an inspection point of view, but also for special projects and practical demonstrations. Knowing the difference between an AC and DC motor makes it easier to choose the right one for a specific demonstration.

Difference Between AC and DC Motor

This subject is also very useful for aspiring engineering students. In this article, the detailed differences between DC and AC motors are given in the form of easy-to-understand tables.

Before understanding the difference between DC and AC motors, it is important to understand the details of electric motors.

What is AC Motor?

The motor uses electrical impulses to convert alternating current into mechanical energy. The motor is powered by alternating current. Its two main components are the stator and the rotor.

The stator is the stationary part of the motor, and the rotor is the rotating part of the motor. AC motors come in two categories one is single phase and the other is three phase.

Three-phase AC motors are useful in industry for converting large amounts of energy from electrical to mechanical. Single-phase AC motors are suitable for low power conversion.

Single phase AC motor is small in size, and provides various types of services in home, office, factory etc. For most home appliances like refrigerator, fan, washing machine, hair dryer, blender etc.,

use single phase AC motor. AC motors are classified into synchronous motors and induction motors.

What is DC Motor?

Direct current ie. A DC motor is a type of electrical device that converts electrical energy into mechanical energy. DC motors utilize electrical energy through direct current, converting that energy into mechanical rotation.

These motors use magnetism which is derived from the generated electricity. This is further energized to the speed of the rotor mounted inside the output shaft.

The term “DC motor” is used to describe any reversible electrical device that converts direct current electrical energy into mechanical energy.

DC motors range in size and power from small motors in toys and appliances to large automotive power systems. There are two main components in DC motors:

the stator and the armature. The stator is the stationary part of the motor, while the armature rotates. The stator in the motor provides a rotating field that drives the armature to rotate.

Types of AC and DC Motor

induction motors, linear motors and synchronous motors are all types of asymmetric motors.

AC motors may also include variable frequency drives to control motor speed and torque, while DC motors are available in a variety of self-excited and excited models.

Difference Between AC and DC Motor

AC Motor DC Motor
An AC motor can be defined as an electric motor that is driven by an alternating current (AC). A DC motor is also a rotatory electric motor that converts Direct current (DC energy) into mechanical energy.
AC motors are mainly of two types – synchronous AC motors and induction motors. C motors are also mainly of two types – DC motors with brushes and DC motors without brushes.
AC motors only run when an alternating current is given as input. DC motors will only run when a DC supply is given. In the case of an DC series motor, the motor might run with an AC supply. But, for shunt motors, the motor never runs on an AC supply.
AC motors can run on both single-phase and three-phase supplies. DC motors can run only on single-phase supply.


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