In electrical motors, what does the term "induction" refer to?

The term "induction" in electrical motors specifically refers to a process wherein a magnetic field induces current flow. In an induction motor, for example, the rotor is not directly connected to the power source. Instead, it operates based on the principle of electromagnetic induction, where the rotating magnetic field created by the stator induces a current in the rotor windings. This induces a corresponding magnetic field in the rotor that interacts with the stator's magnetic field, resulting in rotation.

This principle of induction is crucial for the operation of many types of electric motors, particularly squirrel-cage induction motors, which are commonly used in various applications due to their reliability and simplicity. Understanding how induction works provides insight into the functionality and efficiency of these motors, distinguishing them from other motor types that may operate on different principles.