BG101074A - Method and circuits for improving the characteristics of autonomous inverters - Google Patents

Abstract

The method and the circuits relate to autonomous current inverters and autonomous resonance inverters having no reverse diodes used in metallurgy, welding, inverter engineering, residential electronic equipment, etc. They improve the energy characteristics, reduce the rated power and increase the reliability of the automous inverter having simplified circuitries. By the method total current is passed across the load for part of the half-cycle of the control frequency which consists of resonance or aperiodic current and current of the supply source. The total current runs to the moment when the voltage of the recharging capacitor becomes equal to zero. The method enables the normal operation of the current inverter at load and capacitor connected in series as the losses in the load inductivity are reduced due to the fact that the current running alternatively across it has a constant value within every half-cycle. The circuits includes circuitries of diode and inductivity or only diode and are connected to the input diagonal of the bridge which limits the voltages on the components and the load.