Lecture 09 Dual Active Bridge converter - III

🚗⚡ Dual Active Bridge (DAB) Converter – III | Phase Shift Control | Power Flow Analysis | Electric Vehicles | Lecture 09 The Dual Active Bridge (DAB) Converter is one of the most widely used isolated bidirectional DC–DC converters in electric vehicles, battery energy storage systems, and DC microgrids. In this lecture, we explore how phase-shift control regulates the magnitude and direction of power transfer between the two active bridges. The operating principles are explained using switching waveforms, current paths, and practical examples. This lecture demonstrates the effect of different phase shift angles (δ = 0°, 45°, 90°, 135°, 180°, and 225°) on power transfer. You will learn why power transfer is positive when the phase shift lies between 0° and 180°, reaches its maximum at 90°, becomes negative when the phase shift is between 180° and 360°, and achieves maximum reverse power transfer at 270° (or −90°). The equivalent circuit of the DAB converter is also introduced to explain the influence of leakage inductance and phase shift on converter operation. A practical 400 V to 800 V EV charger example is presented using a transformer turns ratio of 1:2, along with detailed analysis of inductor voltage, current waveforms, and switching states under Single Phase Shift (SPS) control. 📚 Topics Covered ✅ Review of Dual Active Bridge (DAB) Converter ✅ Phase Shift (δ) Control Technique ✅ Positive and Negative Power Transfer ✅ Maximum Power Transfer Condition ✅ Effect of Different Phase Shift Angles ✅ Equivalent Circuit of the DAB Converter ✅ Role of Leakage Inductance ✅ High-Frequency Transformer Operation ✅ Single Phase Shift (SPS) Control ✅ 400 V to 800 V EV Charging Example ✅ Inductor Voltage and Current Waveforms ✅ Switching Sequence and Power Flow Analysis 🎯 Who Should Watch? B.Tech. and M.Tech. students Power Electronics learners Electric Vehicle enthusiasts GATE and ESE aspirants Researchers working on isolated DC–DC converters Engineers designing EV chargers and battery energy storage systems 📖 Recommended References R. W. Erickson and D. Maksimović, Fundamentals of Power Electronics, 2nd Edition, Springer. A. R. Rodríguez, J. Sebastián, D. G. Lamar, M. M. Hernando, and A. Vázquez, An Overall Study of a Dual Active Bridge for Bidirectional DC/DC Conversion, IEEE ECCE 2010. #DualActiveBridge #DABConverter #PhaseShiftControl #SinglePhaseShift #PowerElectronics #ElectricVehicles #DCDCConverter #BidirectionalConverter #BatteryCharging #EVCharging #HighFrequencyTransformer #PowerFlow #ElectricalEngineering #EngineeringStudents #GATE #NPTEL #IITRoorkee #BatteryEnergyStorage #PowerConverter #DCMicrogrid