The paper introduces and analyzes a new single-phase ac chopper circuit with 100 kHz switching frequency. The adequate functioning and high performance of the circuit (the efficiency and the waveform of the absorbed input current and load voltage) were tested both by simulation and experimentally. Beside this wide application range, the converter size and weight are reduced, it is more efficient, responds faster in automatic control applications and the waveforms of the current supplied by the grid and of the output voltages are nearly sinusoidal.

Keywords: Direct ac–ac converter, Bidirectional buck converter, Resistive or inductive load