Performance Comparison of AFZ Converter with PI and FOPID Controller

Autotransformer with only two windings, which reduces complexity and power losses, is the reason for the adaptability of AFZ(Autotransformer forward converter with type-Zeta resonant reset ). It also has good dynamic performance, which is comparable to that of the Forward converter's, low component count (only one active switch), due to the single active switch's ease of usage and great practicality. These advantages allow the AFZ converter to be implemented in a wide variety of applications. In addition, we are able to achieve smooth switching transitions by utilizing the autotransformer type-Zeta resonant reset. The closed loop PI and FOPID controlled steady-state theoretical analysis is presented here. This analysis takes into consideration the effect of the autotransformer leakage inductance. In addition to this, the converter's response in the time domain is analyzed and compared using PI(Proportional plus integral) and FOPID(The fractional order PID (FOPID) controller) systems. The conclusions drawn from the experiments support the theoretical analysis.