- Level Professional
- Duration 14 hours
- Course by University of Colorado Boulder
-
Offered by
About
This course can also be taken for academic credit as ECEA 5708, part of CU Boulder's Master of Science in Electrical Engineering degree. This is Course #4 in the Modeling and Control of Power Electronics course sequence. The course is focused on current-mode control techniques, which are very frequently applied in practical realizations of switched-mode. Practical advantages of peak current mode control are discussed, including built-in overcurrent protection, simpler and more robust dynamic responses, as well as abilities to ensure current sharing in parallel connected converter modules. For peak current-mode controlled converters, slope compensation, and high-frequency effects are discussed in detail. Upon completion of the course, you will be able to understand, analyze, model, and design high-performance current-mode controllers for dc-dc power converters, including peak current-mode controllers and average current-mode controllers. We strongly recommend students complete the CU Boulder Power Electronics specialization as well as Course #1 (Averaged-Switch Modeling and Simulation) before enrolling in this course (the course numbers provided below are for students in the CU Boulder's MS-EE program): Introduction to Power Electronics (ECEA 5700) Converter Circuits (ECEA 5701) Converter Control (ECEA 5702) Averaged-Switch Modeling and Simulation (ECEA 5705) After completing this course, you will be able to: Understand the operating principles and benefits of current-mode control for dc-dc converters Model and design peak current-mode controlled dc-dc converters Model and design average current-mode controlled dc-dc converters Use computer-aided tools and simulations to verify current-mode controlled dc-dc convertersModules
Introduction to Current-Mode Control
1
Discussions
- Introduce Yourself
1
Readings
- Introduction to the Course
Introduction to Peak Current-Mode Control
1
Videos
- Introduction to Peak Current-Mode Control
1
Readings
- MATLAB and LTspice examples
1
Quiz
- Practice: Introduction to Peak Current-Mode Control
Simple Model for Peak Current-Mode Controlled Converters
3
Videos
- Simple Approximate Model
- Small-signal Model Based on Simple Approximation
- Design Example: Synchronous Buck POL Converter
1
Readings
- PI Compensator: Op-Amp Implementation
1
Quiz
- Practice: Peak Current-mode Controlled POL Regulator
Stabilization Using Artificial Ramp
3
Videos
- Oscillation for D > 0.5
- Stabilization with Addition of an Artificial Ramp
- Design Example Revisited: Inclusion of Artificial Ramp
1
Quiz
- Practice: Slope Compensation
Graded Quiz: Peak Current-Mode Control, Simple Model
1
Quiz
- Peak Current-Mode Control, Simple Model
More Accurate Modeling of Peak Current-Mode Control
1
Videos
- More Accurate Average Model
1
Quiz
- Practice: More Accurate Large-Signal Averaged Model
Average Circuit Modeling and Simulations
2
Videos
- Average Spice CPM Subcircuit
- Design Verification Using Average Circuit Simulations
1
Quiz
- Practice: Averaged Circuit Simulation
Small-signal AC modeling
4
Videos
- Small-signal AC Equivalent Circuit Models
- Transfer Functions of CPM Controlled Converters
- Analysis Example: CPM Controlled Boost Converter
- Comparison of Frequency Responses of Duty-cycle and Current-mode Controlled Converters
1
Quiz
- Practice: More Accurate Small-Signal Model
Graded Quiz: Peak Current-Mode Controlled Voltage Regulator
1
Quiz
- Peak Current-Mode Controlled Voltage Regulator
Motivation for High-Frequency Modeling of Current-Mode Controlled Converters
1
Videos
- Motivation for Modeling of High-Frequency Effects
Sampled-Data Modeling of Switching Converters
3
Videos
- Pulse-Width Modulator as a Sampler
- Overview of Sampled-Data Systems
- Sampled-Data Modeling of Switching Converters
1
Quiz
- Practice: Introduction to Sampled-Data Modeling
High-Frequency Modeling of Peak Current-Mode Controlled Converters
6
Videos
- Introduction to Sampled-Data Modeling of Peak Current-Mode Controlled Converters
- Development of Sampled-Data Model
- Frequency Responses of Sampled-Data Models
- 1st Order Approximation
- 2nd Order Approximation
- Summary and Conclusions
Graded Quiz: High-Frequency Effects in Peak Current-Mode Controlled Converters
1
Quiz
- High-Frequency Effects in Peak Current-Mode Controlled Converters
Average Current-Mode Control
2
Videos
- Introduction to Average Current-Mode Control
- Transfer Functions of Average Current-mode Controlled Converters
1
Quiz
- Practice: Averaged Current-Mode Control, Transfer Functions
Modeling and Design of Current and Voltage Control Loops
4
Videos
- Design Example: ACM Controlled Boost dc-dc Converter
- Design Verification by Average Circuit Simulations
- Design of the Voltage Control Loop
- Design Example: ACM Controlled Boost dc Voltage Regulator
Graded Quiz: Average Current-Mode Control
1
Quiz
- Average Current-Mode Control

Dr. Dragan Maksimovic