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Current-Mode Control

Approx. 14 hours to complete

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Course Summary

Learn how to design and analyze current-mode controllers in switched-mode power converters in this course. Gain hands-on experience in designing and testing these controllers on hardware.

Key Learning Points

Understand the principles of current-mode control and its advantages over voltage-mode control in switched-mode power converters
Learn how to design and analyze current-mode controllers using MATLAB
Get hands-on experience in designing and testing current-mode controllers on hardware
Explore advanced topics such as digital current-mode control and current-mode control of resonant converters
Learn from experienced instructors actively involved in research and development in the field of power electronics

Learning Outcomes

Understand the fundamental principles of current-mode control and its advantages in switched-mode power converters
Design and analyze current-mode controllers using MATLAB
Gain hands-on experience in designing and testing current-mode controllers on hardware

Prerequisites or good to have knowledge before taking this course

Basic knowledge of power electronics
Familiarity with MATLAB

Course Difficulty Level

Intermediate

Course Format

Online
Self-paced

Similar Courses

Power Electronics Specialization
Control of Renewable Energy Systems

Related Education Paths

Notable People in This Field

Dr. Fred C. Lee
Dr. Robert W. Erickson

Related Books

Description

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 converters

Outline

Peak Current-Mode Control: Simple Model
Introduction to Peak Current-Mode Control
Simple Approximate Model
Small-signal Model Based on Simple Approximation
Design Example: Synchronous Buck POL Converter
Oscillation for D > 0.5
Stabilization with Addition of an Artificial Ramp
Design Example Revisited: Inclusion of Artificial Ramp
Introduction to the Course
MATLAB and LTspice examples
PI Compensator: Op-Amp Implementation
Practice: Introduction to Peak Current-Mode Control
Practice: Peak Current-mode Controlled POL Regulator
Practice: Slope Compensation
Peak Current-Mode Control, Simple Model

Peak Current-Mode Control: More Accurate Model
More Accurate Average Model
Average Spice CPM Subcircuit
Design Verification Using Average Circuit Simulations
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
Practice: More Accurate Large-Signal Averaged Model
Practice: Averaged Circuit Simulation
Practice: More Accurate Small-Signal Model
Peak Current-Mode Controlled Voltage Regulator

High-Frequency Effects in Peak Current-Mode Control
Motivation for Modeling of High-Frequency Effects
Pulse-Width Modulator as a Sampler
Overview of Sampled-Data Systems
Sampled-Data Modeling of Switching Converters
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
Practice: Introduction to Sampled-Data Modeling
High-Frequency Effects in Peak Current-Mode Controlled Converters

Average Current-Mode Control
Introduction to Average Current-Mode Control
Transfer Functions of Average Current-mode Controlled Converters
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
Practice: Averaged Current-Mode Control, Transfer Functions
Average Current-Mode Control

Summary of User Reviews

Discover the latest techniques in current-mode control with this comprehensive online course from Coursera. Students highly recommend this course for its practical and hands-on approach to the subject matter.

Key Aspect Users Liked About This Course

Many users found the practical approach to current-mode control to be highly beneficial.

Pros from User Reviews

Practical and hands-on approach to current-mode control
Great instructor who explains concepts clearly
Good mix of theory and real-world examples
Solid foundation in the fundamentals of current-mode control

Cons from User Reviews

Some users found the course to be too technical
Not enough emphasis on advanced topics in current-mode control
Some users found the course to be too basic for their needs

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