This document provides an overview of vector control of AC induction motors compared to scalar control. Vector control decouples the torque and flux produced by the motor, allowing for more precise independent control. It does this by controlling the direct current (Id) that produces flux and quadrature current (Iq) that produces torque. There are two approaches to vector control - direct field oriented control that directly measures the rotor angle and indirect field oriented control that indirectly measures it using slip speed. Key benefits of vector control are fast transient response since torque can be controlled without affecting flux, and ability to control speed in all four quadrants.