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Syllabus for

Academic year
ENM070 - Power electronic devices and applications  
Kraftelektroniska komponenter och deras tillämpningar
 
Syllabus adopted 2018-02-13 by Head of Programme (or corresponding)
Owner: MPEPO
7,5 Credits
Grading: TH - Five, Four, Three, Fail
Education cycle: Second-cycle
Major subject: Electrical Engineering
Department: 32 - ELECTRICAL ENGINEERING


Teaching language: English
Open for exchange students: Yes
Block schedule: A+

Course module   Credit distribution   Examination dates
Sp1 Sp2 Sp3 Sp4 Summer course No Sp
0107 Examination 7,5c Grading: TH   7,5c   08 Jun 2019 pm H   12 Oct 2018 pm M   30 Aug 2019 pm SB  

In programs

MPEPO ELECTRIC POWER ENGINEERING, MSC PROGR, Year 1 (compulsory elective)
MPSYS SYSTEMS, CONTROL AND MECHATRONICS, MSC PROGR, Year 1 (elective)

Examiner:

Torbjörn Thiringer

  Go to Course Homepage

Replaces

EEK180   Power electronics-2


Eligibility:


In order to be eligible for a second cycle course the applicant needs to fulfil the general and specific entry requirements of the programme that owns the course. (If the second cycle course is owned by a first cycle programme, second cycle entry requirements apply.)
Exemption from the eligibility requirement: Applicants enrolled in a programme at Chalmers where the course is included in the study programme are exempted from fulfilling these requirements.

Course specific prerequisites

Power electronic converters

Aim

The aim of this course is that the students should develop and demonstrate an enhanced knowledge regarding power electronic components as well as the design and applications of power electronic converters. In the area of components it is particularly the semiconductors for power electronics that are studied. The aim is to highlight their properties from a power electronic perspective and how these affect the converter design.

The converter design includes design of driver circuits of various quality and for various applications, design of snubber circuits for improved EMI and loss operation, thermal calculations and considerations and converter topologies utilizing soft-switching and resonant circuits. The aim is to study other aspects of the converter design, besides the selection of the component ratings of the main circuit, which needs to be considered in order to obtain a well functioning converter design.

In the field of applications different applications of power electronic equipment connected to the grid are studied, such as HVDC (both classical and modern VSC-based), FACTS equipment, power factor correctors, UPS and power conditioners.

Learning outcomes (after completion of the course the student should be able to)

  • Describe turn-on and turn-off transients of a MOSFET using equivalent circuit models.
  • Design drive circuits for MOSFET and IGBT transistors.
  • Describe how turn-on, turn-off and overvoltage snubber circuits are designed and how they operate.
  • Calculate component values for turn-on, turn-off and overvoltage snubbers based on circuit requirements.
  • Analyze the oscillations over a switching component in a real circuit and design a snubber circuit that reduces the oscillations. The improvements are also to be implemented on a real circuit.
  • Theoretically describe the function of a control circuit for a dc/dc-converter. Design and practically put a control circuit into operation and determine suitable component values in order to obtain voltage regulation, current mode control and over-current protection.
  • Calculate the current and voltage wave-forms in load-resonant (SLR), zero-voltage swtiching (ZVS) and zero-current switching(ZCS) resonant converters with the knowledge of initial current and voltage values.
  • Describe how HVDC converter systems and FACTS equipment (e.g. an SVC, TSCR or TCR) works and with which components such converters are realized.
  • Describe important aspects regarding power quality/EMI/EMC such as requirements, propagation, generation, effect and mitigation.
  • Perform simplified calculations on how inductively and capacitively coupled disturbances propagate from source to victim.
  • Choose suitable filters for DC/DC-converters, EMI-mitigation and FACTS applications.
  • Describe how a diode, thyristor, GTO, BJT, IGBT, IGCT and a MOSFET is designed and how it operates.
  • Describe and compare inverters for drive systems and grid connected applications.
  • Illustrate the usage of energy storage systems (e.g. batteries and supercapacitors) in power electronic applications.
  • From an engineering point of view, be able to identity and select suitable components so that the demands are satisfied for the analyzed converter with respect to e.g. size and losses.
  • Model power electronic circuits using Spice based program and simulate and analyze impact on circuit performance and electrical stress on circuit components.
  • Write report with results of electric circuit analysis with focus on data presentation and data commentary.

Content

Lectures and tutorials:
  • Gate drivers: for bipolar transistors, MOSFETs, thyristors and GTOs, unipolar and bipolar driving, control circuits.
  • Snubber circuits: turn-on, turn-off and over-voltage snubbers. Lossless and RCD snubbers. Snubber design for various applications.
  • Soft-switching converters: Series and parallel resonant converters, zero-switching current and voltage converters (ZVS, ZCS).
  • Control of DC/DC-converters: Usage and design of a control IC, current and voltage protection, voltage and current control, design of converter bandwidth.
  • Power electronic apparatus connected to the grid: Power factor corrector circuits, power conditioners & UPS.
  • HVDC and FACTS: classical thyristor-based HVDC, new voltage source converter-based HVDC, construction of SVCs and TCSCs.
  • Harmonics: origin, impact and filtering of harmonics. EMI considerations.
  • Construction and behavior of semiconductor devices: diodes, thyrsitors, GTOs, MOSFETs, BJTs, IGBTs and MOSFETs.
  • Energy storage systems: batteries and supercapacitors.
  • Motor drives and grid connected inverters.
Project (compulsory):
Three compulsory projects work including experimental work on the design of a power electronic converter. as well as circuit design. modelling and simulation. The measured, calculated and simulated results of the projects shall be presented in written reports.

Organisation

The course comprises of ca 19 lectures (2 x 45 min), 13 tutorials (2 x 45 min), one practical laboratory project work (28 h).

Literature

Mohan, Undeland, Robbins, Power Electronics, Converters, applications and design, Wiley 2003, 3rd ed.

Examination including compulsory elements

Written examination. Grades: Fail, 3, 4 or 5. Approved project work including written reports.


Published: Mon 28 Nov 2016.