A simple method that maintains a constant voltage-to-frequency ratio; it is used in applications where precise control isn't critical.
The "prime mover" that converts electrical energy into mechanical motion. Common types include DC motors, induction motors (AC), and synchronous motors. Fundamentals of electric drives
If you are looking for academic materials on this topic, several authoritative textbooks are widely used: Fundamentals Of Electric Drives Gk Dubey induction motors (AC)