Delta-connected circulating current cycloconverter apparatus

Details Delta-connected circulating current cycloconverter apparatus Delta-connected circulating current cycloconverter apparatus

1984-07-30

1987-06-16

Beha, Jr., William H.

Electric power conversion systems

Frequency conversion without intermediate conversion to d.c.

By semiconductor converter

318729, 323207, H02M 5257, G05F 170

Patent

active

046740260

ABSTRACT:
A cycloconverter apparatus has three sets of AC/DC converters which are coupled to a 3-phase load and are connected in a delta fashion to form a circulating current type cycloconverter. Load currents to be supplied to the 3-phase load are controlled by a load current control circuit. Reactive power at the power supply side of the cycloconverter is detected by a reactive power detector. The sum of output currents from the converters is controlled by a current sum control circuit in accordance with a detected signal from the reactive power detector. The triggering phase of each of the converters is controlled by output signals from the load current control circuit and from the current sum control circuit. The controlled subject is the sum of the converter output currents, and the load currents are controlled directly.

REFERENCES:
patent: 4013937 (1977-03-01), Pelly et al.

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