What is the most common type of electric motor found in industrial applications?

The most common type of electric motor found in industrial applications is the induction motor, specifically the squirrel cage rotor design. This design is favored because of its robustness, reliability, and efficiency in converting electrical energy into mechanical energy. Induction motors operate on the principle of electromagnetic induction, allowing them to run without needing complex control systems or maintenance-intensive components like brushes, which are found in other types of motors.

Squirrel cage rotor induction motors consist of a rotor that has a cage-like structure, which enhances their ability to withstand operational stresses and provides high starting torque. This makes them well-suited for various industrial tasks, from driving pumps and compressors to conveyor belts and fans.

In contrast, universal motors, while versatile and used in smaller appliances, are not as commonly found in heavy industrial use due to their reliance on brushes, which can lead to wear over time. Stepper motors, though used in precise control applications, are generally employed in less power-intensive settings. Overall, the simplicity and effectiveness of the induction motor's design, particularly the squirrel cage rotor variant, make it the most prevalent choice in industrial environments.