| 摘要 |
<p>It is described an arrangement for providing an AC current to a load, in particular for direct electrical heating, the arrangement comprising: a transformer (240, 109, 244, 640, 740) for transforming input voltages between three transformer input terminals (241, 242, 243) connected to three primary windings (244) to three transformer output voltages at three secondary winding portions (109, 409, 509), the transformer having at least two transformer output terminals (111, 112, 113); a AC-DC-AC converter cell (133, 433, 533, 633, 733), the converter cell having at least two converter input terminals (111, 112, 113) connected to the at least two transformer output terminals, the converter cell having a first converter output terminal (135, 435, 535) and a second converter output terminal (137, 437, 537), wherein the first converter cell output terminal (135) is adapted to be connected to the load (350, 650, 750, 850).</p> |
