Electrical Drives

Basic components of electrical drives. Overview of the electrical drives field, brief history, present state and future trends.

Static and dynamic operation, characteristics of motors and loads, dynamic torque. Electrical and mechanical transient states, condition for static stability of drive systems. Design of electrical motors, commissioning, housing types, cooling, connections to the supply.

Electrical motors: induction motor (slip ring and squirrel cage), synchronous motor (with excitation winding or permanent magnet), reluctance motor, dc brush motor, dc brushless motor. Static and transient characteristics, problems during start-up and braking, speed control. Semiconductor converters for dc and ac drives and their control.

Methods for correct selection of electrical motors, dimensioning, thermal characteristics, duty cycles. Principles of energy efficient electrical motors nad drives, operation with high efficiency and power factor.

Special electrical drive systems: traction systems (drives in rail and automotive applications), electrical shafts, crane drives, linear motor drives, ultra speed drives.

Protection of electrical drives – disturbances from the load and supply, classical protection techniques, modern approach – on-line condition monitoring and supervision with applied detection and diagnostic techniques.

To acquire knowledge and procedures to succesfully design, dimension, operate and maintain different types of electrical drives in industrial and transportation systems.

The lectures provide a theoretical background on discussed topics. A complete study material is available to the students.

Successful practical work on laboratory excercises, which take place in smaller groups, enables prior acquaintance of the students with computational and demo tasks.