A synchronous motor is an electric motor that operates at a constant speed, synchronized with the frequency of the electrical supply. It uses a rotating magnetic field produced by alternating current (AC) to turn its rotor, which is designed to lock in step with this magnetic field. This means that the rotor speed matches the speed of the magnetic field, allowing for precise control of the motor's operation. These motors are commonly used in applications requiring high efficiency and consistent speed, such as in industrial machinery and power generation. Synchronous motors can be powered by either AC or DC sources, but they typically require additional components, like inverters, to operate effectively with AC power.