The number of ECE ILLINOIS faculty members.
Fundamentals of circuits for electrical energy processing. Discusses power electronics as a vital enabler for future energy. Switching converter principles, harmonics, pulse-width modulation, phase control, and phase modulation, dc-dc, ac-dc, and dc-ac, power converters. Alternative and renewable energy applications. High-performance power supply circuits. Power components, including capacitors, magnetic components and power semiconductor switching devices. Considerations in solar, wind, and fuel cell power.
To develop all major power electronics concepts, from both systems and components perspectives. To present major design considerations for switching power conversion, including operation and control choices, harmonics and filtering, circuit models of real sources and devices, magnetics design, and passive and active component behavior.
Covers the fundamentals of electronics for electrical energy processing, and applications to renewable and alternative energy. The course seeks to develop all major power electronics concepts, from both systems and components perspectives. It presents major design considerations for switching power conversion, including operation and control choices, harmonics and filtering, circuit models of real sources and devices, magnetics design, and passive and active component behavior. These are presented in applications context for diverse situations, including solar and wind energy conversion, hybrid and electric cars, high-performance computer power supplies, switching audio amplifiers, solid-state lighting, utility control and smart grids, portable power, and many others.
A variety of analytical and simulation examples.
See ECE 469.
P. T. Krein, Elements of Power Electronics, Oxford Univ. Press.
Engineering Science: 2 credits
Engineering Design: 1 credit
Modern electrical energy systems are increasingly dominated by electronics for energy processing and management. The primary goal of the course is to give students a foundation for analysis and design of electronic circuits for conversion and control of electrical energy. The work is placed in the context of modern energy challenges, including alternative electricity resources and efficient energy applications. An additional goal is to help students fit together their complete electrical engineering background to tackle practical design problems. The course presents concepts, fundamental analysis tools, practical considerations for design, and a range of power electronics applications. The letter codes refer to the Department-wide program outcomes list.
Intended course outcomes emphasize electrical engineering synthesis. Students need to assemble their body of knowledge to address diverse energy applications. The intended plan is to help students understand depth issues: evaluating a problem and application from all directions, seeking to understand it in depth before embarking on a solution. Breadth is a primary feature of the course, since power electronics is becoming ubiquitous in all devices and systems that use or process electrical energy. The course emphasizes applications as diverse as electric vehicles, solar panels, high-performance power supplies for low-voltage digital circuits, solid-state lighting, battery charging, grid interfaces, and a host of others. Students are taught professionalism aspects, such as learning how to establish detailed specifications from a general set of user requirements, how to look beyond basic requirements to understand user needs, how attributes of a design may meet literal requirements but still lead to an unacceptable solution, how to understand cross-disciplinary team strategies from addressing major application challenges, and learning how to consider broad aspects and implications of global energy challenges. The lifelong learning aspects are also emphasized, since applications change quickly and new needs arise every day. The course includes extensive demonstrations and physical devices to help students get a literal feel for how problems are addressed and what extra considerations limit designs.
A. By the time of Exam No. 1 (after about 15 lectures), the students should be able to do the following:
1. Discuss energy conversion needs of society, and describe the purpose of power electronics in addressing these needs. Discuss the fundamental need for electronic processing in the context of a wide range of alternative and renewable resources. (4,7)
4. Analyze almost any two-switch power electronic circuit, and determine its input-output function, based on energy balance and energy conservation. (1)
5. Describe the constraints imposed by circuit theory on switch action, and discuss the physical bases of these constraints. (1)
10. Discuss user expectations and requirements, and describe the measures and specifications that have been developed to help users link needs to power supply performance. (4)
13. Discuss alternative energy applications and solid-state lighting, and the types of dc-dc converters applied in these contexts. (4)
B. By the time of Exam No. 2 (after about 30 lectures), the students should be able to do all of the items listed under A, plus the following:
15. Identify switch control waveforms appropriate for controlled rectifiers and inverters, and plot input and output voltage and current waveforms for these converters. (1)
20. List important current applications for inverters, and describe typical configurations for solar, electric vehicle, wind turbine, switching amplifier, and other inverter systems. (4)
C. By the time of the Final Exam (after about 43 lectures), the student should be able to do all of the items listed under A and B, plus the following:
21. Analyze dc-dc converters operating in the discontinuous conduction regime. (1)
25. Develop series L-C-R models of real capacitors, either from laboratory data, specification sheets, or engineering estimates. Select capacitors for a given power application, and compute the ripple effects of ESR. (1, 2, 6, 7)
27. Analyze magnetic circuits intended for application as power inductors or transformers in circuits operating at frequencies up to hundreds of kilohertz. (1)
29. Analyze power converter effects of static voltage drops and resistances in semiconductors. (1)
30. Estimate losses in switching power semiconductors in specific converter circuits. (1)