Asynchronous motors, also known as induction motors, are a type of electric motor commonly used in various industries. Unlike synchronous motors, which require an external power source to maintain their speed, asynchronous motors operate by inducing a magnetic field through their rotor.

The primary principle behind asynchronous motors is the creation of a magnetic field within the stator, which induces a current in the rotor. This current then interacts with the magnetic field, creating motion. The rotor in an asynchronous motor always rotates at a speed slightly slower than the rotating magnetic field, which is why they are often referred to as "induction" motors.

One of the key benefits of asynchronous motors is their simplicity and robustness. They do not require brushes or external excitation, making them low maintenance. These motors are ideal for continuous operation and are commonly used in applications like conveyors, fans, and small pumps.

Although asynchronous motors are less energy-efficient compared to synchronous motors, they remain a cost-effective and widely used solution in many industries. Their simplicity, durability, and ease of maintenance make them a popular choice for general-purpose electric motor applications.