Summary

The objective of this course is to expand the knowledge and expertise of practicing engineers in the area of DC/DC converters. The course will focus on the modeling and design of DC/DC converters, including magnetic design and loop design, and their applications in DC motor drives, DC power supplies, power factor correction circuits, photovoltaic stand-alone and grid-connected systems and fuel cell-based stationary and mobile systems.

Objectives

  1. Learn about DC/DC converter topologies, control techniques, and applications.
  2. Learn about modeling and design aspects of DC/DC converters.
  3. Learn about magnetic design and loop design for DC/DC converters.

Major topics

  1. DC/DC Converter Topologies and Control Techniques
  2. Modeling and Design Aspects of DC/DC Converters
  3. Magnetic Design and Loop Design for DC/DC Converters

Detailed plan

Topic No. of Lecture Sessions Sub-Topics
Overview of Semiconductor Devices, Waveform Quality, and Low-Pass Filters 1
  • Characteristics of Diodes, Thyristors and Controllable Switches, Switch Losses
  • Waveform Distortion and Harmonics, Quality Indices
  • Input and Output Low-Pass Filter Design
Non-Isolated DC/DC Converter Topologies and Control Techniques 2
  • Buck Converter
  • Synchronous-Rectifier Buck Converter
  • Boost Converter, Buck-Boost Converter, Cuk Converter
  • Full-Bridge (Bidirectional) DC/DC Converter
  • Topology Selection
  • Control Techniques: Hysteresis, Pulse-Width Modulation
  • Interleaving of Converters, Worst-Case Design, Applications
DC/DC Converter Modeling 1
  • Average Modeling Technique
  • State-Space and Transfer Function Representations
  • Stability Issues
Isolated DC/DC Converter Topologies and Control Techniques 2
  • Need for Electrical Isolation
  • Flyback Converter, Forward Converter, Push-Pull Converter
  • Half-Bridge Converter, Full-Bridge Converter
  • High-Frequency-Link DC/DC Converter
  • Phase-Shift Modulation Technique
  • Multi-Output DC/DC Converter
  • DC Power Supplies, Practical Considerations
Feedback Control of DC/DC Converters 1
  • Feedback Control of DC/DC Converters: Objectives
  • Feedback Controller Design in Voltage-Mode Control
  • Feedback Controller Design in Current-Mode Control
Front-End Diode- Rectifier Bridge Circuits and Power Factor Correction 1
  • Front-End Types in Power Electronic Circuits
  • Front-End Diode-Rectifier Bridge, Starting Transient Inrush Current, Single-Phase Power Factor Correction (PFC)
  • Design of Inner and Outer Current-Control Loops
  • Feedforward of the Input Voltage
Snubber Design and Soft Switching 1
  • Hard-Switching: Practical Issues
  • Snubber Circuits: Benefits and Design
  • Soft-Switching: Benefits and Limitations
Magnetic Design 1
  • Overview of Basics of Magnetics, Leakage and Magnetizing Inductances, Transformers, Basics of Magnetic Design
  • Inductor and Transformer Structures
  • Area-Product Method, Design Examples
Design Aspects of DC/DC Converters 1
  • Thermal Management
  • Parallel Connection of Switches
Other DC/DC Converter Applications 1
  • DC Motor Drives
  • Photovoltaic Stand-Alone and Grid-Connected Systems
  • Fuel Cell-Based Stationary and Mobile Systems

References

  1. Mohan, Undeland and Robbins, Power Electronics: Converters, Applications, and Design, 3rd Edition, John Wiley & Sons, Inc., 2003.
  2. D.W. Hart, Introduction to Power Electronics,, Prentice Hall, 1997.
  3. J.G. Kassakian, M.F. Schlecht and G.C. Verghese, Principles of Power Electronics, Addison-Wesley Publishing Company, Inc., 1992.
  4. P.T. Krein, Elements of Power Electronics, Oxford University Press, Inc., 1998.
  5. R.P. Severns and G.E. Bloom, Modern DC-To-DC Switch Mode Power Converter Circuits, Van Nostrand Reinhold, 1985.
  6. K. Kit Sum, Switch Mode Power Conversion: Basic Theory and Design, Marcel Dekker, Inc., 1984.

Prerequisites

Basic understanding of circuit analysis and control theory. Familiarity with magnetic circuits and electric machinery is desirable.