METHOD AND DEVICE FOR CONTINUOUS ADJUSTMENT AND REGULATION OF A TRANSFORMER TURNS RATIO, AND TRANSFORMER PROVIDED WITH SUCH A DEVICE

摘要

In a method and a device for continuously adjusting, within a certain adjustment range, the turns ratio between the primary (4) winding and the secondary (6) winding of a power transformer (2) provided with at least one regulating winding, a first tap (6a, 6b, 6c, 6d) is switched on during a portion of a cycle of the alternating voltage of the transformer (2) and a second tap (6b, 6c, 6d, 6a) is switched on during another portion of the cycle of the alternating voltage. For this purpose, the device comprises electronic switches (8a, 8b, 8c, 8d, 10a, 10b, 10c, 10d) in the form of thyristors or transistors.