An "unrestricted frequency changer" employing force commutated thyristors

A new approach for applying forced commutation to a thyristor cycloconverter is presented. Using a known waveform synthesis technique, this type of cycloconverter possesses several unique characteristics. The theory of operation as related to a six-pulse, three-phase bridge configured cyclonconverter is presented. Performance of a working model is illustrated in the form of calibrated waveform oscillographs. In view of its simplicity, high efficiency and technical advantages, this type of cyclonconverter is worthy of consideration for many power frequency applications.