STEUERUNGSVERFAHREN FUER EINEN ZYKLOKONVERTER UND EINRICHTUNG DAFUER.

摘要

There is disclosed a control system for a cycloconverter of the circulating current type to produce an ac current of a variable frequency and a system therefore. This cycloconverter (CC) is configured to connect a power factor compensating capacitor (CAP) at its receiving-end, thus to control a lagging reactive power due to a circulating current flowing in the cycloconverter (CC) so as to cancel a leading reactive power due to the power factor compensating capacitor (CAP). Such a control is carried out under the condition of an operation below the rated load. In contrast, under the condition of an operation above the rated load, a control is effected so that the circulating current flowing in the cycloconverted (CC) is substantially kept constant.