A synchronous motor with a wound rotor is a type of electric motor that operates at a constant speed, synchronized with the frequency of the power supply. It features a rotor that has windings, which are connected to an external power source. This design allows for better control of the motor's magnetic field and torque. These motors are commonly used in applications requiring precise speed control and high starting torque, such as in industrial machinery and pumps. The ability to adjust the rotor's excitation makes them versatile for various operational conditions, enhancing their efficiency and performance.