A High Reliability Ferroresonant Inverter with Improved Efficiency and Wider Input Voltage

In this research, a ferroresonant (SATFORMER) inverter, optimized in terms of power efficiency, noise reduction, and reliability, is analyzed and described. This modified SATFORMER inverter can be used as a standalone inverter. In the proposed topology, the variable DC input is converted to an AC square wave by a thyristor-based modified current source inverter and additionally applied to primary winding, which is divided into four sub-windings, that are wound on the saturable core portion, via six relays with one change-over (CO) contact. The proposed ferroresonant inverter is innovative, to the best of our knowledge. A method for reducing the power losses of the proposed inverter is described and analyzed. A 150 VA model of a constant voltage transformer (ferroresonant transformer) is tested in order to experimentally investigate its basic characteristics. The circuit and simulated results of the modified current source inverter are presented in detail. The experimental results of our 150 VA model are presented. A precise term is introduced to describe the operation of the converter’s magnetic components. The occurring phenomenon is thoroughly explained, and a meaningful, perceptive, and newly incorporated term is introduced to provide a clearer understanding of the phenomenon.