公开(公告)号：US3559012A

公开(公告)日：1971-01-26

申请号：US3559012D

申请日：1968-10-15

Applicant: INT COMPUTERS LTD

Inventor： GILLIES BARRIER ANDREW ,  BOLTON ADRIAN JOHN

IPC: H02K37/14 ,  H02K37/00

CPC classification number: H02K37/14

Abstract: A STEPPING MOTOR HAS AN EVEN NUMBER OF STATOR POLES AND A TWO POLE ROTOR. A SHIFT REGISTER ENERGIZES STATOR POLE WINDINGS, EACH STAGE OF THE REGISTER BEING CONNECTED TO A PAIR OF DIAMETRICALLY OPPOSED STATOR POLE COILS. THE REGISTER IS PRE-SET TO PRODUCE A STATOR MAGNETIC FIELD PATTERN AND UPON RECEIPT OF SHIFT SIGNALS, THE PATTERN IS STEPPED AROUND THE STATOR. THE STATOR FIELD PATTERN IS SUCH THAT THE ROTOR IS ATTRACTED TO A PARTICULAR POLE WHILE POLES ADAJACENT TO THE PARTICULAR POLE AND ON EITHER SIDE THEREOF PRODUCE REPULSIVE FIELSS AIDING IN RETAINING THE ROTOR IN ALIGNMENT WITH THE PARTICULAR POLE. A SHIFT SIGNAL STEPS THE STATOR FIELD PATTERN SUCH THAT THE ADJACENT POLE IN THE DIRECTION OF ROTATION PRODUCES AND ATTRACTIVE FIELD TENDING TO ALIGN THE ROTOR THEREWITH WHILE THE PARTICULAR POLE AND OTHER ADJACENT POLE PRODUCE REPULSIVE FORCES ALSO TENDING TO STEP THE ROTOR BY INCREASING THE TORQUE APPLIED TO THE ROTOR. THE STATOR IS PRODUCED BY BUILDING A STACK OF STARSHAPED LAMINATIONS, ASSEMBLING THE STACK WITH COILS ON EACH LEG INTO A CYLINDRICAL CASE, SETTING THE WHOLE IN POTTING COMPOUND AND BORING OUT THE CENTRE OF THE LAMINATIONS TO LEAVE INDEPENDENT POLES.