1. Induction

Class of motors that derives its name from the fact that current is induced into the rotor windings without any physical connection with the stator windings (which are directly connected to an AC power supply); adaptable to many different environments and capable of providing considerable power as well as variable speed control. Typically there is "slip," or loss of exact speed tracking with induction motors.

2. Synchronous

Class of motors that operate at constant speed up to full load. The rotor speed is equal to the speed of the rotating magnetic field of the stator; there is no slip. Reluctance and permanent magnet are the two major types of synchronous motors. A synchronous motor is often used where the exact speed of a motor must be maintained.

3. AC Servo

AC servomotors are typically permanent magnet synchronous motors that can often have low torque-to-inertia ratios for high acceleration ratings.

4. Universal

Class of motor that can operate at approximately the same speed and output on either DC or single-phase AC power; also known as an AC/DC motor.

5. Others - Unlisted or specialized AC motor construction.

6. Multi-speed

Motor speed can be continuously adjusted or set at discrete speeds within the operating range.

7. Reversible

Motor can be run in both clockwise and counterclockwise directions with approximately the same operating characteristics