Correct option is B
A compound motor drive is not an AC drive, but a DC drive.
Induction motor Also known as an asynchronous motor, this AC motor's rotor turns at a speed slower than the stator's rotating magnetic field. Induction motors are often used in industrial drives and for smaller loads like garbage disposals.
Synchronous motor:
This AC motor's rotor turns at the same rate as the stator's rotating magnetic field. Synchronous motors are often used in applications that require precise speed control, such as servo drives and high-speed compressors.
