Phase converter

Details Phase converter Phase converter

1974-12-18

1976-05-25

Pellinen, A. D.

321 54, H02M 5257

Patent

active

039597121

ABSTRACT:
A semiconductor valve type converter for supplying single phase load current at power frequency from an N phase polyphase power system without unbalance of polyphase current or voltage comprises a transformer having KN secondary phase voltages displaced by 180/KN electrical degress (where K is an integer) and a bridge type thyristor network for connecting each secondary phase voltage source alternately to positive and negative network buses. The network buses are connected through a centertapped reactor with the single phase load connected between the reactor tap and the secondary phase voltage sources. A commutating circuit effectively connected across the last thyristor to fire during each positive and negative half cycle of single phase output voltage may be provided if necessary to effect the network reversal of single phase current at each half cycle of power frequency.

REFERENCES:
patent: 1684317 (1928-09-01), Harms
patent: 1948119 (1934-02-01), Lobl
patent: 2009834 (1935-07-01), Bedford
patent: 2428543 (1947-10-01), Boyer et al.
patent: 2474866 (1949-07-01), Sciaky
patent: 3541423 (1970-11-01), Kelley et al.
patent: 3546562 (1970-12-01), Havas et al.

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