Charging Infrastructure & DC–DC Converters – III | Flyback & Forward Converters | Electric Vehicles | Lecture 06

In this lecture, we introduce Isolated DC–DC Converters, which provide galvanic isolation, improved safety, and greater design flexibility for electric vehicle power conversion systems. The lecture begins with transformer models and the dot convention, followed by a detailed analysis of the Flyback Converter and Forward Converter operating in Continuous Conduction Mode (CCM). Step-by-step derivations of voltage conversion ratios, inductor current ripple, minimum inductance, output capacitor design, and operating waveforms are presented to help build a strong foundation in isolated power converter design.

Topics Covered
Introduction to Isolated DC–DC Converters
Advantages of High-Frequency Transformer-Based Converters
Ideal, Complete, and Simplified Transformer Models
Transformer Dot Convention
Flyback Converter: Operating Principle
Flyback Converter Steady-State Analysis
Voltage Conversion Ratio
Diode Current and Waveform Analysis
Minimum Magnetizing Inductance Design
Output Capacitor Design
Limitations of Flyback Converters
Forward Converter: Operating Principle
Forward Converter Steady-State Analysis
Voltage Conversion Ratio and Waveforms
Inductor and Capacitor Design Considerations

Who Should Watch?

B.Tech. & M.Tech. students
Power Electronics learners
Electric Vehicle enthusiasts
GATE & ESE aspirants
Researchers and practicing engineers
Anyone interested in isolated power converter design

Recommended Reference:
R. W. Erickson and D. Maksimović, Fundamentals of Power Electronics, 2nd Edition, Springer.

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