Modular bi-directional AC / AC converter without energy buffer.

摘要

A modular bi-directional AC / AC converter according to the invention, has a 6 × n-type p-transformer with 3 × n × k three-phase outputs (71-79) on a secondary side, and 3 × n × k bidirectional AC / (33), wherein: the three n-k three-phase outputs (71-79) together form a symmetrical 6 × n-pulsed voltage system, from each of the AC converters (35, 36, 37) are connected to one of the three-phase outlets (71-79) by means of an AC / AC converter (27). In this case, each of the AC / AC pulse converters (27) has a three-phase bidirectional converter with a six-switch bridge circuit as an input stage for connecting the three input conductors (35, 36, 37) with a memoryless intermediate circuit, and as an output stage for connecting the intermediate circuit to An upper and a lower output conductor (31, 32), a single-phase bidirectional converter having a four-switch bridge circuit. The invention also relates to a method for controlling a modular bidirectional AC / AC converter and an AC / AC pulse converter.