A Single-Phase Self-Oscillating Thyristor Inverter

A single-phase self-oscillating square-wave inverter using silicon controlled rectifiers, which can operate at any load power factor is described. The inverter can operate either in a fixed-frequency fixed- voltage mode or with a variable-frequency variable-voltage mode within the commutation capability, where the frequency to voltage ratio remains constant. The circuit has higher power handling capability compared to a similar type transistor inverter. A basic center-tapped circuit has been designed and tested and shows promising performance.