What is a key difference between AC and DC motors?

AC motors operate on alternating current, which is a fundamental characteristic that differentiates them from DC motors. Alternating current refers to the type of electricity that periodically reverses direction, typically delivered in a sinusoidal waveform. This type of current allows AC motors to be more easily integrated into power distribution systems, especially for applications requiring variable speed and torque.

The design of AC motors often includes components like stators and rotors which take advantage of this alternating nature to produce rotational force. This is in contrast to DC motors, which rely on direct current that flows consistently in one direction. Understanding this principle is crucial for identifying the appropriate motor type for various applications in mechanical and electrical systems.