About this course: This course introduces more advanced concepts of switched-mode converter circuits. Realization of the power semiconductors in inverters or in converters having bidirectional power flow is explained. Power diodes, power MOSFETs, and IGBTs are explained, along with the origins of their switching times. Equivalent circuit models are refined to include the effects of switching loss. The discontinuous conduction mode is described and analyzed. A number of well-known converter circuit topologies are explored, including those with transformer isolation. The homework assignments include a boost converter and an H-bridge inverter used in a grid-interfaced solar inverter system, as well as transformer-isolated forward and flyback converters. After completing this course, you will: ● Understand how to implement the power semiconductor devices in a switching converter ● Understand the origins of the discontinuous conduction mode and be able to solve converters operating in DCM ● Understand the basic dc-dc converter and dc-ac inverter circuits ● Understand how to implement transformer isolation in a dc-dc converter, including the popular forward and flyback converter topologies. Completion of the first course Introduction to Power Electronics is the assumed prerequisite for this course.
Created by: University of Colorado Boulder
Taught by: Dr. Robert Erickson, Professor
Electrical, Computer, and Energy Engineering
| Basic Info | Course 2 of 6 in the Power Electronics Specialization |
| Commitment | 4 weeks of study, 1-3 hours/week |
| Language | English |
| How To Pass | Pass all graded assignments to complete the course. |
| User Ratings |
Syllabus
WEEK 1
Ch 4.1: Switch Realization
How to implement the switches using transistors and diodes, including applications having bidirectional power flow or ac outputs
3 videos, 3 readings
- Reading: Syllabus for Course 2
- Reading: If you have problems with the Coursera system
- Video: Sect. 4.1.1 Single-Quadrant Switches
- Video: Sect. 4.1.2 Current-Bidirectional Switches
- Video: Sects. 4.1.3-5 Two- and Four-Quadrant Switches, Synchronous Rectifiers
- Reading: Homework Assignment 1: hard copy
- Discussion Prompt: Homework Discussion: Switch Realization
Graded: Homework Assignment 1: Switch Realization
WEEK 2
Ch 4.2: Power Semiconductor Switches
Basics of power semiconductor switches, including the origins of switching times and switching loss. How to incorporate switching loss into equivalent circuit models. MOSFETs, IGBTs, and gate driver considerations.
10 videos, 2 readings
- Video: Sect. 4.2.0 Introduction to Power Semiconductors
- Video: Sect. 4.2.1.1 Diode Rectifiers
- Video: Sect. 4.2.1.2 Equivalent Circuit Modeling of Switching Loss
- Video: Sect. 4.2.1.3 Boost Converter Example
- Video: Sect. 4.2.1.4 More About Rectifiers
- Video: Sect. 4.2.2.1 Power MOSFETs
- Video: Sect. 4.2.2.2 MOSFET Gate Drivers
- Video: Sect. 4.2.3 BJTs and IGBTs
- Video: Sect. 4.3 More About Switching Loss
- Video: Simulation of a Synchronous Boost Converter
- Reading: LTspice File: Synchronous Boost Converter
- Reading: Hard copy and zip file for simulation assignment
- Discussion Prompt: Homework Discussion: Simulation Assignment
- Discussion Prompt: Optional Forum: Followup Questions
Graded: Homework Assignment #2: Simulation
WEEK 3
Ch 5: Discontinuous Conduction Mode
The discontinuous conduction mode (DCM) arising from unidirectional switch realization. Analysis of mode boundaries and output voltage.
3 videos, 1 reading
- Video: Sect. 5.1 Origin of DCM and Mode Boundary
- Video: Sect. 5.2 Analysis of the Conversion Ratio M(D,K)
- Video: Sect. 5.3 Boost Converter Example
- Reading: Homework Assignment 3: Hard Copy
- Discussion Prompt: Homework Discussion: Switching Loss and DCM
Graded: Homework Assignment #3
WEEK 4
Ch 6: Converter Circuits
Some well-known converter circuits and their origins. How to incorporate transformer isolation into a dc-dc converter. Analysis and equivalent circuit modeling of transformer-isolated converters.
6 videos, 1 reading
- Video: Sect. 6.1.1-2 DC-DC Converter Topologies
- Video: Sect. 6.1.4 How to Synthesize an Inverter
- Video: Sect. 6.2 A Short List of Nonisolated Converters
- Video: Sect. 6.3 Transformers
- Video: Sect. 6.3.2 The Forward Converter
- Video: Sect. 6.3.4 The Flyback Converter
- Reading: Homework Assignment #4: Hard Copy
- Discussion Prompt: Homework Discussion: Transformer Isolation
Graded: Homework Assignment #4: Chapter 6
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Ratings and Reviews
Very interesting course. All these dynamics involving converters are awesome. Congratulations for the course. Now heading for course 3. Thanks a lot.
Great course...From basics to advanced exercise questions help a lot in concept building...
The class provides a very clear and organized introduction of
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