This document provides an overview of ultrasonic motors (USMs). It discusses the types of USMs, including standing wave and traveling wave motors that can be linear or rotary. It describes the basic working principle of how piezoelectric materials convert electrical energy to mechanical vibrations. The construction of USMs involves piezoelectric actuators, stators, rotors and casings. When voltage is applied, actuators vibrate and transfer energy to stators, creating surface waves that pull rotors to generate rotation. USMs offer advantages like high torque, precision, and suitability for harsh environments. Applications discussed include cameras, hard disks, robots and medical devices. A case study examines how USMs enabled precise robotic