Maximum Attainable Phase Shift Angle in Practical Current Source Fed Semi-Active Rectifier

Semi active rectifiers (SAR) have proven to be a solid middle ground in terms of performance, when compared to standard full bridge diode rectifiers and active rectifiers (AR), in matters of system complexity and efficiency. Phase shift control is often applied to these systems in cases when output regulation and or/load matching is required. This paper analyzes non-ideal SAR, considering voltage transients caused by parasitic capacitance of the lower leg transistors, in order to derive the maximum shift angle for which correct system operation is maintained. The analytical results are then solidified by a numerical example simulated in PSIM software.