GB597140A - Improvements relating to regulating means for alternating electric current generators - Google Patents

Abstract

597,140. Alternators; transformers. LUCAS, Ltd., J., and LAIRD, J. A. Aug. 10, 1945, No. 20628. [Classes 35 and 38 (ii)] An alternator has its exciting winding connected through a rectifier to a transformer having two primary windings, one carrying the load current and the other connected across an alternator phase winding, the transformer windings being on different parts of its core. One such transformer can be provided for each phase in the case of a polyphase alternator. In the form shown, the rectifier h is fed by three secondary windings g in parallel and the primaries f<1> are connected across phases which are lagging with respect to the phase in the circuit of which primary f is connected, or the two primaries of the same transformer can be in series with and across the same phase winding. One limb of the transformer may be separated from the remainder by air gaps (Fig. 2, not shown).