SingleStage SinglePhase BiDirectional Grid Interface Circuit with Digital

Single-Stage Single-Phase Bi-Directional Grid Interface Circuit with Digital Lookup Table Based Control Evan Reutzel, Seth Sanders Motivatio Interleaved Flyback Topology n Emerging trends including distributed Flyback A Application s §Battery Charger Grid Interface Flyback B §Frontend for Computer Power Supplies §Reactive Power Compensation §Grid Interface for Home Based DC Distribution S 1 Cin Dclamp SCR Bridge S 1 Vline Cin PI e = Vout + Rref. Iout - Vref S 3 Dclamp Duty Cycle Magnitude Lookup Table Dclamp LB S 2 Coupled Iout Flyback Converter §DC side regulation §Stiff Voltage Control §Load-Line Regulation §AC side regulation §Power Factor Correction §Arbitrary PF control §Inverter Mode S 4 Simulation Coupled Magnetics + VA, pri + VA, sec - + + VB, sec VB, pri - - Load Line Power Loop Control Applications DC Load photovoltaic generation, electric vehicles, high-effiiciency fullspectrum consumer electronics and smart grid applications are driving the need for a new generation of versitle, high performance, low-cost lineinterface converters. Vout Line Angle Input Voltage Observer Cout S 2 Lookup Table Based Control AC Input LA Prototype Lookup Table Training Vout AC Input Voltage Observer Iin, Desired +- Line Angle Duty Magnitude Cycle Lookup Table Current Adjustment Logic Coupled Iin Flyback Converter