ENM061 ENM061 Power electronic converters lp2 HT20 (7.5 hp)
Course is offered by the department of Electrical Engineering
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Short description of the course purpose and content: can be copied from syllabus in Studieportalen. Additional information can be added.
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Learning objectives and syllabus
- Determine Fourier components and total harmonic distortion (THD) for basic current and voltage wave-shapes.
- Recognize the operating principle of the most common active components (e.g. diode, thyristor, IGBT, and MOSFET) as well as the most common passive components (e.g. capacitors, transformers and inductors).
- Explain and exemplify how pulse width modulation (PWM) works. Describe the purpose as well as the means to control the desired quantity and recognize the need for a controller circuit within the power electronic converter.
- Analyze and perform analytical calculations of ideal DC/DC converters such as the buck, boost, buck-boost, flyback and the forward converter. The operating principle of each topology is differentiated and thoroughly evaluated in both continuous and discontinuous conduction mode by its current and voltage wave-shapes. In addition to this, other topologies (e.g. the push-pull, half-bridge and full-bridge converter) and circuit enhancements (e.g. converter interleaving) are exemplified.
- Describe the basic operating principle of both single-phase and three-phase DC/AC inverters. Different modulation strategies (e.g. PWM and square wave operation) are implemented and the resulting current and voltage waveforms are evaluated and compared.
- Explain the operation of multilevel converters (e.g. 3-level and 5-level NPC and MMC topologies) by current and voltage waveform analysis and apply the benefits and drawbacks to e.g. harmonics and losses.
- Perform calculations on single- and three-phase diode rectifiers operating with voltage-stiff and current-stiff DC-side. Apply the concept of line impedance within the converter circuit (current commutation) and evaluate the influence.
- Perform calculations on single- and three-phase thyristor rectifiers operating with a current stiff DC-side. Apply the concept of line impedance within the converter circuit (current commutation) and evaluate the influence. Analyze more advanced topologies (e.g. 12-pulse connection) of the thyristor rectifier and distinguish the benefits and drawbacks.
- Identify simple power electronic converter diagrams and schematics. Recognize the different parts in a physical circuit on which basic wave-shape and efficiency measurements is performed.
- Perform an average small-signal dynamic modeling of a step-down converter in order to demonstrate how a corresponding analog and digital controllers can be designed.
- Determine the losses in both passive and active components. The resulting temperature in the active component is evaluated and an appropriate heat-sink is chosen. Have a basic understanding of how the lifetime of a component can be determined.
- Implement and test the various power electronic converter circuits, containing discrete elements, using Spice-based computer softwares as well as perform practical labs to have a firsthand experience on how real DC/DC converters operate. The exercises will help to understand the operating principles of the various converter circuits, analyze waveforms, evaluate parameter variations and perform harmonic/Fourier analysis.
Link to the syllabus on Studieportalen.
If the course is a joint course (Chalmers and Göteborgs Universitet) you should link to both syllabus (Chalmers and Göteborgs Universitet).
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