Fundamentals of Electrical Machines

Higher education teachers: Miljavec Damijan

Subject description

Prerequisits:

• Subscription in second year of study.

Content (Syllabus outline):

• Nominal data and operation of electrical machines. Magnetic field. Induced voltage. Electromagnetic torque. Losses and efficiency. Heating of electrical machines.
• Physical design of transformer. Active and passive components of the transformer. Connection types of three-phase transformer. Equivalent circuit of the transformer. Basic measurements of the transformer.
• Physical design of synchronous machine. Structure of the stator and the various embodiments of the rotor. Passive components of synchronous machine and their role. Different types of load and operation. Phasor diagram of synchronous machine rotor turbo. Phasor diagram of synchronous machine with salient poles. Specific types of synchronous machines ( SRM , BLDC , stepper motors ) .
• Physical design of induction machine. Structure of the stator and the various embodiments of the rotor. Passive induction machine parts and their role. Torque curve . Controlling the speed of rotation. Single-phase induction motors. Basic tests of induction machine.
• Physical design of commutator machine. Various stator and rotor types. Passive collector machine parts and their role. Winding connections of DC commutator machines and operating characteristics. Characteristics of DC machine. Universal motor.

Objectives and competences:

Understanding the physical principles of electrical machines of various types. Knowing the input-output characteristics of electrical machines. Acquire the ability to select the most appropriate type of machine for a particular application. Specific operational characteristics and properties of electric machines and from them the following additional requirements that must be met by electric machine drives.

Intended learning outcomes:

The student will understand the operational principles of electric machines. Understand the basic characteristics of various types of electrical machines. Understand the basic problems in the production and use of each machine. He will know the applicability of individual electrical machines.

Learning and teaching methods:

• Lectures and laboratory work. Laboratory exercises are with heightened risk (high voltage, rotating parts, ...).
• The course consists of 45 hours of lectures and 30 hours of laboratory exercises with heightened risk.

Study materials

Readings:

1. Damijan Miljavec, Peter Jereb: Električni stroji – temeljna znanja, Ljubljana, 2009
2. Stephen J. Chapman, Electric Machinery Fundamentals, McGraw-Hill Higher Education; 5 edition, 2011
3. Dino Zorbas, Electric Machines, Nelson Engineering , 2014
4. P. C. Sen, Principles of Electric Machines and Power Electronics, John Wiley & Sons; 3rd Edition, 2013