Current-Sourcing Push-Pull Parallel-Resonance Inverter (CS-PPRI): Theory and Application as a Fluorescent Lamp Driver

A novel topology, Current-Sourcing Push-Pull Parallel-Resonance Inverter (CS-PPRI) was investigated theoretically and experimentally. The proposed power stage is built around a current fed push pull inverter. The main features of the proposed inverter is a load independent output current and Zero Voltage Switching (ZVS). It is suggested that the proposed CS-PPRI is a viable al ternat ive for real iz ing electronic ballasts for low and high intens i ty d ischarge lamps . a method for a series coupling which is suitable for push-pull stages. In the proposed CS-PPRI (Fig. 1), load coupling is carried out via a current transformer which includes a split primary. The purpose of this configuration is to retain the symmetrical operation of the push pull stage by balancing the resistive load seen by each half of the circuit.