This course describes the principle of electrical drive systems, their types, elements, characteristics, performance, and applications. Drive systems discussed in this course are single–phase and three–phase DC drive systems, AC drive systems, DC chopper drive systems, and dynamic/regenerative braking. Introduction to UPS systems is provided. Batteries, their types, characteristics, specifications, troubleshooting, application, battery chargers' types and performance are also studied. These drive circuits are to be implemented in the laboratory.