Electrical Drives

Higher education teachers: Fišer Rastko

Subject description

Content (Syllabus outline):

• Components of electrical drives. Past, present and future trends in drive systems. Stationary and transient states of electrical drives. Characteristics of electric motors, typical load torques. Moments of inertia of complex drive systems, accelerating torque. Electrical and mechanical transients, stability problem of drive system. Types of electric motors, their supplying, connection, selecting and cooling.
• Electric motors in drive systems:
• DC (commutator and brushless) machines. Induction (slip ring, squirrel cage, solid rotor) machines. Synchronous (field winding, permanent magnet, reluctance) machines. Principles of operation, speed-torque characteristics and possibilities of their modofications. Starting and breaking dynamics, classical and modern principles of speed and motion control. 4Q operation.
• Methods for selecting the drive types. Sizing and dimensioning electric motors. Thermal conditions, cooling principles, standard and user defined duty types. Reactive power compensation.
• Energy efficient motors and drive systems – technical and economical aspects, principles of energy savings. Electrical drives with increased reliability and fault tolerant op

Objectives and competences:

Student will be provided with the knowledge and procedures for design and maintenance of grid supplied and controlled electrical drives in industrial and traction systems.

Intended learning outcomes:

Student will get knowledge about basic and advanced electrical drives, their elements and principles of operation. He will be acquainted with the relations between electric motor and driven machine. He will understand dependence of current and torque characteristics on several input controllable parameters.

Learning and teaching methods:

Lectures, practical laboratory hands-on excercises with preliminary instructions.

Study materials

Readings:

1. R. Fišer, Interno študijsko gradivo v pisni in elektronski obliki (Internal study material).
2. J. Weidauer, R. Messer, Electrical Drives – Principles, Planning, Applications, Solutions,
3. Publicis Publishing, Siemens, 2014
4. A. Hughes, B. Drury, Electric Motors and Drives – Fundamentals, Types, Applications, 4th Ed.,
5. Newness, Elsevier, 2013.
6. B. Drury, The Control Techniques Drives and Controls Handbook, 2nd Ed., IET, 2009.
7. A. Emadi, Energy-Efficient Electric Motors, Marcel Dekker, 2005.
8. T. Wildi, Electrical Machines, Drives, and Power Systems, Pearson, Prentice Hall, 2006.