Unrestricted frequency changer with current source output

Details Unrestricted frequency changer with current source output Unrestricted frequency changer with current source output

1987-09-02

1988-06-07

Beha, Jr., William H.

Electric power conversion systems

Cascaded or combined, diverse conversions in which the...

Combined phase and frequency conversion

363160, H02M 522

Patent

active

047500980

ABSTRACT:
Three terminal, six and twelve pulse unrestricted frequency changing circuits are provided by inserting controllable bidirectional switching circuits between open star configured coils in multiple phase windings of isolation transformers. Where the switched winding are secondaries of the isolation transformer, interphase transformers are provided between each pair of three pulse circuit groups and additional interphase transformers are required between six pulse circuit groups to provide a three terminal output. Where the switched windings are primary windings of the isolation transformer, the secondary windings are electrically connected in series with each other to provide the three terminal output.

REFERENCES:
patent: 3431483 (1969-03-01), Lafuze
patent: 4697230 (1987-09-01), Neft

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