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A new method for turning off the silicon-controlled rectifiers (SCR) in a parallel inverter has been developed. The basis of this method is a special transformer incorporating two square-loop cores. The operation of a self-oscillating inverter using such a transformer is analyzed, and results obtained from a test circuit are presented. This type of inverter is characterized by a square-wave output voltage, easy starting, and small size and weight for a given frequency and power capability.