Improvement of Electric Power Conversion Efficiency of Magnetic Oscillation-Type DC–AC Converter

This paper describes fundamental characteristics of a direct current/alternating current (dc-ac) converter utilizing magnetic oscillation. An ac-voltage source such as the line electric power source is connected to an excitation winding of the magnetic oscillation circuit in series. The dc-ac converter can supply electric power to the ac-voltage source, and can control electric power with small signal current, which flows through a control winding. The electric power conversion efficiency of the dc-ac converter is improved by adding a small switching circuit into the converter. Output current waveform of the converter is almost sinusoidal.