Courses for Kids
Free study material
Offline Centres
Store Icon

Uses of AC Motors

Last updated date: 04th Mar 2024
Total views: 126.6k
Views today: 2.26k
hightlight icon
highlight icon
highlight icon
share icon
copy icon


An AC motor is a piece of electrical equipment that turns alternating current into mechanical movement. AC motor uses range from converting large amounts of electrical power to mechanical power in factories to small amounts of power in homes. AC motors can be either single-phase or three-phase. Three-phase motors are mainly used to convert large amounts of power. Synchronous and induction are the two kinds of AC motors. In this article, let's briefly discuss what an AC motor is and how it works.

What is an AC Motor?

AC Motor

AC Motor

A motor that turns alternating current (AC) into mechanical power is called an AC motor. The stator and the rotor are both essential parts of an AC motor. The amount of the motor that doesn't move is called the stator. The part that moves is called the rotor. AC motors can have either one phase or three phases. In 1887, Nikola Tesla came up with the first AC induction motor.

How Do AC Motors Work?

AC motor is a term for several types of motors, such as single-phase, three-phase, brake, synchronous, asynchronous, customized, two-speed, and three-speed single-phase. The difference between the different types is based on the work that needs to be done. For example, some AC motors are simple and used for small jobs, while others are made for more significant, challenging assignments. 

One big difference is that the phase of the electrical feed is different for homes and factories.

Single or double-phased electricity is used in homes, while three-phased electricity is used in factories. This difference makes an industrial AC motor different from a residential one. AC motors are called "induction motors" because the torque they make comes from the electromagnetic induction of the magnetic field of the stator.

Uses of AC Motors

AC motors can be used for many things, from running appliances to powering significant machinery. 

  • Their low cost and high efficiency make them useful in many situations. 

  • AC motors are the main part of any situation where electric motors are needed.

  • AC motors are stronger than other engines because and ac motors are used in industries as they can use strong currents to make more torque.

  • They come in many different shapes, sizes, and power levels to meet the needs of any industry.

Application of AC Motor

Here are some uses for AC motors:

  • AC motors are used in home appliances like water pumps, drills, and other tools.

  • AC motors are also used in refrigerators, washing machines, grinders, and other household items.

  • AC motors are also used in compressors and other industrial areas.

  • Electric cars also use AC motors.

  • AC motors are used in many real-world situations because they are simple and last a long time.

The Different Types of AC Motor

The Types of Motor

The Types of Motor

The different kinds of AC motors are explained in detail below. Based on how they work, AC motors can be put into the following categories:

  • Synchronized Motor- A synchronous motor is a motor that runs at the same speed as another motor. Synchronous speed is the constant speed at which the motor creates electromotive force. When an electromagnet is in a rotating magnetic field, it magnetically locks onto the field and turns at the same speed as the field.

  • Induction Motor- The most common type of motor is an induction motor. Induction motors are also called asynchronous motors because they always run slower than synchronous.


AC motors use alternating current and magnetism to create mechanical energy. The main benefit of an AC motor is that it can keep putting out the same amount of torque up to the speed it is rated for. The main parts of an AC motor are the stator, the outer drum that stays still, and the rotor, which is the inner part that spins and is attached to the shaft of the motor.

AC motors are used in various industrial settings because they are strong, flexible, durable, and easy to maintain due to their simple design.

FAQs on Uses of AC Motors

1. What's better about an AC motor than a DC motor?

AC motors without brushes make more torque. You can use a controller to change an AC motor's power and speed. Since an AC motor doesn't need a commutator or brushes, there are no sparks.

2. What is the use of an AC Motor Rotor?

AC motor rotors aren't connected to external power sources, unlike DC motors. Stator powers it. Three-phase induction motor rotors may be squirrel cage or wrapped. The squirrel cage rotor has rotor bars with end rings. Split phase, capacitor start, capacitor start and run, permanent split phase capacitor run, and shaded pole (A, B, C, D, and E) are all squirrel cage rotors. Most squirrel cages are metal or copper.

3. What is the use of bearings in AC Motor?

AC motor bearings support and position the rotor, keep the air gap small, and transmit stresses. They function at different speeds with less friction. AC motors use a ball and roller bearings. The number of rotations or hours an AC motor bearing can last determines its life. Conditions and lubrication are also important.