Bidirectional AC-DC Converter for Regenerative Braking

In this paper, a bidirectional AC-DC converter is analyzed. The converter applies a half‑bridge thyristor rectifier and a recuperating thyristor bridge instead of a braking resistor. Recuperating mode of the converter is focused in the analysis, and it is shown that the converter exposes two operating modes within the recuperating mode, one characterized by negligible, and the other one characterized by significant distortion of the input voltages. Theoretical results are experimentally verified on a 10kW converter.