Controllable voltage a.c. generator system

Details Controllable voltage a.c. generator system Controllable voltage a.c. generator system

H - Electricity

02

P

322/14.1

H02P 9/00 (2006.01) H02K 19/34 (2006.01) H02P 9/30 (2006.01)

Patent

CA 1120540

Abstract of the Disclosure This invention relates to a generator system for generating a 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, rotary generator producing an A.C. potential of a frequency identical to that of the first generator, the A.C. potential outputs of all the generators 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 the resultant combined A.C. outputs constitute an A.C. potential of the selected value and being of the substantially constant selected fre- quency. Each of the generators is preferably of the type having a field core of soft magnetic material having a cylindrical surface upon which is placed a layer of magnetizable permanent magnetic material, and a juxtaposed wound stator having a matching cylindrical surface, has an excitation coil which can affect the layer of perma- nent magnetic material when energized with A.C. potential so that it will produce a pattern of north and south magnetic poles in the layer of permanent magnetic material in the adjacent field core and such pattern will induce an A.C. potential in primary windings in the stator as the so magnetized field core moves with respect to the stator. The means for shifting the phases of the A.C. potentials of the generators is accomplished by shifting the phase of the A.C. excitation potential to one of the excitation coils, both excitation coils being energized A.C. potentials with otherwise identical frequency.

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