CONTROLLABLE VOLTAGE A.C. GENERATOR SYSTEM

摘要

Abstract of the DisclosureThis invention relates to a generator system for generatinga readily controllable A.C. of a selected potential and of a substan-tially constant selected frequency, which system comprises a first,or master, rotary generator producing an A.C. potential of substan-tially constant frequency and at least one other, or slave, rotarygenerator producing an A.C. potential of a frequency identical tothat of the first generator, the A.C. potential outputs of all thegenerators being combined in series, and electrical means for shift-ing the phase of the A.C. potential of the slave generator with re-spect to the phase of the A.C. potential master generator whereby theresultant combined A.C. outputs constitute an A.C. potential of theselected value and being of the substantially constant selected fre-quency. Each of the generators is preferably of the type having afield core of soft magnetic material having a cylindrical surfaceupon which is placed a layer of magnetizable permanent magneticmaterial, and a juxtaposed wound stator having a matching cylindricalsurface, has an excitation coil which can affect the layer of perma-nent magnetic material when energized with A.C. potential so that itwill produce a pattern of north and south magnetic poles in the layerof permanent magnetic material in the adjacent field core and suchpattern will induce an A.C. potential in primary windings in thestator as the so magnetized field core moves with respect to thestator. The means for shifting the phases of the A.C. potentials ofthe generators is accomplished by shifting the phase of the A.C.excitation potential to one of the excitation coils, both excitationcoils being energized A.C. potentials with otherwise identicalfrequency.