Power transistor drive apparatus in a DC-converter

Details Power transistor drive apparatus in a DC-converter Power transistor drive apparatus in a DC-converter

1976-05-05

1977-04-12

Shoop, William M.

321 45R, H02M 3335

Patent

active

040177831

ABSTRACT:
A current drive apparatus in a DC-converter including a pair of alternately conducting power transistors. The drive apparatus includes two drive transistors and a first and second drive transformer. The primary winding of the two transformers is connected via a drive transistor to one terminal of the DC-source and the secondary winding is connected to the control circuit of each power transistor. A further transformer, not being magnetically coupled to the two drive transformers, has two windings connected to the main current path of the power transistors and a further winding connected to one end of the primary windings of the drive transformer in order to couple a fraction of the current through a conducting power transistor to the control circuit of the same transistor. A capacitor is connected across each of said primary windings and each of said drive transistors to provide additional blocking voltage to the non-conducting power transistor.

REFERENCES:
patent: 2848614 (1958-08-01), Lyons
patent: 3219907 (1965-11-01), Josephson
patent: 3374415 (1968-03-01), Jewett et al.
patent: 3875483 (1975-04-01), Farr
patent: 3958169 (1976-05-01), Hergenhan

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