SETT OCH ANORDNING FOR ATT VID EN ASYNKRONMASKIN MED ATMINSTONE EN STATOR MED OPPEN MAGNETKRETS REGLERA FORFLYTTNINGSHASTIGHETEN AV ANKARET I FORHALLANDE TILL STATORN

摘要

Asynchronous electromagnetic machine having an open magnetic circuit has a supplementary winding at each end of its field winding and the phase of the current supplied to these supplementary windings is varied to produce a variable difference between the phase in said supplementary windings and one of the phases in the main field winding.