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Electrical Machines 1

Module name (EN):
Name of module in study programme. It should be precise and clear.
Electrical Machines 1
Degree programme:
Study Programme with validity of corresponding study regulations containing this module.
Electrical Engineering and Information Technology, Bachelor, ASPO 01.10.2018
Module code: E2507
SAP-Submodule-No.:
The exam administration creates a SAP-Submodule-No for every exam type in every module. The SAP-Submodule-No is equal for the same module in different study programs.
P211-0081, P211-0082
Hours per semester week / Teaching method:
The count of hours per week is a combination of lecture (V for German Vorlesung), exercise (U for Übung), practice (P) oder project (PA). For example a course of the form 2V+2U has 2 hours of lecture and 2 hours of exercise per week.
2V+1U+1P (4 hours per week)
ECTS credits:
European Credit Transfer System. Points for successful completion of a course. Each ECTS point represents a workload of 30 hours.
4
Semester: 5
Mandatory course: yes
Language of instruction:
German
Assessment:
Written exam, practical exam with composition (2 lab experiments, ungraded)

[updated 08.01.2020]
Applicability / Curricular relevance:
All study programs (with year of the version of study regulations) containing the course.

E2507 (P211-0081, P211-0082) Electrical Engineering and Information Technology, Bachelor, ASPO 01.10.2018 , semester 5, mandatory course, technical
Workload:
Workload of student for successfully completing the course. Each ECTS credit represents 30 working hours. These are the combined effort of face-to-face time, post-processing the subject of the lecture, exercises and preparation for the exam.

The total workload is distributed on the semester (01.04.-30.09. during the summer term, 01.10.-31.03. during the winter term).
60 class hours (= 45 clock hours) over a 15-week period.
The total student study time is 120 hours (equivalent to 4 ECTS credits).
There are therefore 75 hours available for class preparation and follow-up work and exam preparation.
Recommended prerequisites (modules):
None.
Recommended as prerequisite for:
Module coordinator:
Prof. Dr.-Ing. Stefan Winternheimer
Lecturer: Prof. Dr.-Ing. Stefan Winternheimer

[updated 10.09.2018]
Learning outcomes:
After successfully completing this course, students will be familiar with the basics of electromechanical energy conversion, in particular how to apply the basic laws of electrical engineering to solving problems in electrical machines. In addition, they will be able to use the acquired knowledge to determine the most important electromagnetic quantities in electrical machines. The course provides a basis for understanding the spatial and temporal relationships in electrical machines and will enable students to draw parallels between the properties of different machine types. The methods learned in this course also form the basis for entry into the advanced BA and MA "Electrical Machines" modules.

[updated 08.01.2020]
Module content:
1. Introduction 1.1 Applying Maxwell´s equations to the electrical machine 1.2 Magnetic circuit of an electric machine 1.3 Conductor parameters of an electrical machine 2 Windings, currents and air-gap flow2.1 Basic terms 2.2 Linear current density, electric loading 2.3 Magnetizing a coil and a winding 2.4 Winding factor 2.5 Matrix representation of winding magnetomotive forces (MMF) 2.6 Time-dependent excitation 2.7 Generating a rotating magnetic field 2.8 Representation of the air gap flow in a rotating reference frame 2.9 Commutator windings 2.10 Squirrel cage rotor winding 3 Air gap flow and induction 3.1 DQ representation of spatial dimensions in air gap induction 3.2 Influence of slots on air-gap flow and induction; Carter factor 3.3 Resultant air gap flow and air gap induction in a commutator machine 3.4 Resultant air gap flow and air gap induction in a synchronous machine 3.5 Resultant air gap flow and air gap induction in an asynchronous machine 4. Equivalent circuits electrical machines 4.1 Main and stray inductances 4.2 Main inductance of a coil and winding in a slotless cylindrical unsaturated machine 4.3 Main inductance of a coil and winding in a slotless cylindrical saturated machine 4.4 Main inductance of coil and winding in unsaturated machine with variable air gap geometry 4.5 Mutual inductance between windings in a slotless unsaturated machine 4.6 Influence of slotting on both sides of the air gap on main and mutual inductances 4.7 Equivalent circuit diagram of electrical machines 4.8 Induced voltage in windings of electrical machines 5. Force and torque in electrical machines 5.1 The role of magnetic energy in electromechanical energy conversion 5.2 The force on conductors in slots of electrical machines 5.3 The torque generated by currents per winding and the torque function 5.4 Electromagnetic torque as a function of air gap sizes

[updated 08.01.2020]
Teaching methods/Media:
Transparencies, blackboard, lecture notes and electronic handouts

[updated 08.01.2020]
Recommended or required reading:
Eckhardt, Hanskarl: Grundzüge der elektrischen Maschinen, Teubner, 1982 Richter, Rudolf: Elektrische Maschinen, Band 1: Allgemeine Berechnungselemente, Birkhäuser, 1951

[updated 08.01.2020]
 
[Thu Apr 25 17:49:00 CEST 2024, CKEY=e3E2507, BKEY=ei, CID=E2507, LANGUAGE=en, DATE=25.04.2024]