Course syllabus
Kraftelektronik - komponenter, omvandlare, reglering och tillämpningar
Power Electronics - Devices, Converters, Control and Applications
EIEN25, 15 credits, A (Second Cycle)
Valid for: 2021/22
Faculty: Faculty of Engineering, LTH
Decided by: PLED E
Date of Decision: 2021-04-22
General Information
Elective for: E4-em, M4-me, M4-tt
Language of instruction: The course will be given in English on demand
Aim
The aim of the course is to give an orientation on the
characteristics of modern active and passive components that are
used in power electronic converters. The course also gives an
understanding of the function of power electronic converters like
AC/DC-converters, switched mode power supplies, frequency
converters for motor control, and high voltage DC-transmission
(HVDC).
The course gives knowledge on the control of power electronic
converters in general and also in special applications where power
electronics is used, like electromechanic drive systems, rotating
electric machines, linear motors, loudspeakers and so on. Power
electronics in power system applications is another area which is
treated in the course, where active net filters and transistor
based HVDC are investigated. There are also two projects, aiming
at giving an active knowledge in simulations, experimental work,
and evaluation of circuits and systems within the area of power
electronics.
Learning outcomes
Knowledge and understanding
For a passing grade the student must
- be able to analyze and understand power electronic
circuits;
- be able to analyze modulation methods (carrier wave and
tolerance band) for power electronic converters;
- be able to analyze models of electrical machines suitable for
deriving current, torque and speed regulators.
Competences and skills
For a passing grade the student must
- be able to estimate the semiconductor losses in switched power
electronic converters;
- be able to formulate models of electrical machines suitable for
deriving current, torque and speed regulators;
- be able to derive and implement current, torque and speed
regulators for electric drive systems in digital signal
processors.
Judgement and approach
For a passing grade the student must
individually be able to
- select components for power electronic converters based on
current and voltage level sand switching frequency;
- estimate the characteristics of an electric drive system in
comparison with other, non-power electronic alternatives.
Contents
- Lectures: Switch mode power supplies, principle of
forward and flyback operation. Rectifiers and inverters. Modulation
of power electronic converters. Control of power electronic
converters. Electrical machines. Based on dynamical models of
electrical machines and modulation methods for power electronic
converters, control systems for position, speed, torque, flux, and
current are developed. Grid connected converters: active filters,
HVDC transmission and transistor based HVDC transmission. Renewable
energy systems. Devices: diodes, bipolar power transistors, field
effect transistors (MOSFET), insulated gate bipolar transistors
(IGBT), thyristors, gate turn-off thyristors and passive components
used in power electronic circuits. For the components, the
properties, limitations, drive and protective circuitry, are
discussed. Loss-estimation and cooling of power electronic devices
and equipment.
- Simulations: Analysis of the components and parts of the
switch mode power supply and transistor full-bridge converter also
examined experimentally in the laboratory. The simulation program
used is a commercially available power electronics simulation
package;
- 6 home assignments containing calculus and simulation
work covers the course curricula regarding electrical machines and
control of electrical drives. The exercise hours are used for
supervision of the home assignments;
- Laboratory work: Practical aspects of power electronic
control of electrical drives are emphasized in numerous laboratory
sessions and simulation exercises. Experimental validation of the
operation of a switch mode power supply and a transistor
full-bridge converter;
- Project: One report on practical aspects of electrical
drives including results based on the home assignments. One report
on the simulation and the experimental laboratory work on the
switch mode power supply and the transistor full-bridge converter.
Written and oral report.
Examination details
Grading scale: TH - (U,3,4,5) - (Fail, Three, Four, Five)
Assessment: Approved laborations and simulations that are reported continuously. Written exam (5 h) with both problem solving and theoretical questions.
The examiner, in consultation with Disability Support Services, may deviate from the regular form of examination in order to provide a permanently disabled student with a form of examination equivalent to that of a student without a disability.
Parts
Code: 0118. Name: Power Electronics.
Credits: 10. Grading scale: TH. Assessment: Written exam Contents: Written exam
Code: 0218. Name: Laboratory and Simulation Exercises.
Credits: 5. Grading scale: UG. Assessment: Approved laboratory work and written reports. Contents: Approved laboratory work and written reports.
Admission
Assumed prior knowledge: ESSF01 Analogue Circuits, ESS030, ESSF20 Physics of Devices, ESSF15 Electrical Engineering (EE) or MIE012, EIEF35 Electrical Engineering, basic course (ME) and FRT010, FRTF05 Automatic Control, Basic Course.
The number of participants is limited to: No
The course overlaps following course/s: EIE023, EIE041, EIE015
Reading list
- Alaküla M, Karlsson P: Power Electronics – Devices, Circuits, Control and Applications, IEA, LTH.
Contact and other information
Course coordinator: Professor Mats Alaküla, mats.alakula@iea.lth.se
Course homepage: http://www.iea.lth.se/kel/
Further information: EIEN25 may not be combined with ETEF10 Power in the diploma.