公开(公告)号：US3694716A

公开(公告)日：1972-09-26

申请号：US3694716D

申请日：1970-08-14

申请人： SINGER GENERAL PRECISION

发明人： ELAND PAUL D

IPC分类号： G01C19/04 ,  H02P5/50 ,  H02P7/36

CPC分类号： G01C19/04 ,  H02P5/51

摘要： In a system employing gyroscopes driven by AC motors at synchronous speeds the motors are controlled so that their rotors always occupy the same synchronous position with respect to the rotating magnetic fields in the motors. This control, which makes the drift of the gyroscope due to rotor unbalance constant, is achieved by generating a rotor marker pulse each time the rotor passes through a predetermined angular position and causing the rotor to be positioned so that this pulse occurs at a preselected point in the cycle of energization of the AC motor.