Lecture 08 Dual Active Bridge converter - II

🚗⚡ Dual Active Bridge (DAB) Converter – II | Switching Modes & Phase Shift Control | Electric Vehicles | Lecture 08 In this lecture, we continue the study of the Dual Active Bridge (DAB) Converter by analyzing its switching operation, current flow paths, and phase-shift-based power transfer mechanism. The operation of both the primary and secondary full bridges is explained in detail, highlighting the role of switches and anti-parallel diodes under different current directions. The lecture demonstrates how phase shift (δ) between the gate pulses of the two bridges controls the magnitude and direction of transferred power. Various operating cases including δ = 0°, 45°, and 90° are discussed using switching waveforms, inductor current, bridge voltages, and power flow analysis. This lecture builds the foundation for understanding DAB modulation techniques and advanced converter control. 📚 Topics Covered ✅ Review of Dual Active Bridge Converter ✅ Primary and Secondary Bridge Switching Sequences ✅ Current Flow Through Switches and Anti-Parallel Diodes ✅ Inductor Voltage and Current Waveforms ✅ Role of Leakage/Series Inductor ✅ Bidirectional Power Transfer ✅ Phase Shift (δ) Control ✅ Operation for δ = 0° ✅ Operation for δ = 45° ✅ Operation for δ = 90° ✅ Power Transfer Mechanism in DAB ✅ Understanding Circulating (Back) Power ✅ Foundation for Advanced DAB Modulation Techniques 🎯 Who Should Watch? B.Tech. & M.Tech. students Power Electronics learners Electric Vehicle enthusiasts GATE & 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. C. Calderon et al., "General Analysis of Switching Modes in a Dual Active Bridge with Triple Phase Shift Modulation," Energies, 2018. #DualActiveBridge #DABConverter #PhaseShiftControl #PowerElectronics #ElectricVehicles #BidirectionalConverter #DCDCConverter #BatteryCharging #BatteryEnergyStorage #HighFrequencyTransformer #ElectricalEngineering #EVCharging #SwitchingAnalysis #IGBT #MOSFET #EngineeringStudents #GATE #NPTEL #IITRoorkee #PowerTransfer