Field-Oriented Control (FOC) is used to control the AC synchronous and induction motors. FOC is a different method of spinning up the motors. It was originally developed for high-performance motor applications that are required to operate smoothly over the full speed range, generate full torque at zero speed, and have high dynamic performance including fast acceleration and deceleration.
We use FOC for its superior efficiency and extremely quiet operating sound. Using FOC coupled with sensors gives us extreme low end torque for when you are traveling up a steep hill at low speeds.