Induction motors are the workhorse for the industry. Speed sensorless control in an induction motor drive offers many advantages like additional mechanical robustness, improved electrical signal noise immunity, minimum space utilisation, shaft availability on both sides of the motor for loading along with cost reduction. This book has reported two new classes of Model Reference Adaptive Control (MRAC) based speed sensorless drives that work in all operating regions with minimum parameter sensitivity especially at low speeds. Further, it has also proposed second order sliding mode controllers...