公开(公告)号：DE2061155A1

公开(公告)日：1971-06-24

申请号：DE2061155

申请日：1970-12-11

Applicant: IBM

Inventor： CHARLES BURNS ROBERT ,  EDWARD DREJZA JOHN ,  FRANKLIN MANNING DONALD ,  LOUIS STARK RICHARD ,  JOSEPH STILES DONALD ,  EUGENE WALLACE JOSEPH ,  TONSEND WILSON III JOSEPH

IPC: B41J9/38 ,  G06K15/02

公开(公告)号：DE1958942A1

公开(公告)日：1970-06-18

申请号：DE1958942

申请日：1969-11-24

Applicant: IBM

Inventor： EDWARD DREJZA JOHN ,  THOMAS KOZOL EUGENE ,  ELDEN PELKIE ROBERT ,  EUGENE WALLACE JOSEPH

IPC: H02K37/20 ,  H02K37/00

Abstract: 1,258,174. Machines with permanent magnets. INTERNATIONAL BUSINESS MACHINES CORP. 5 Nov., 1969 [26 Nov., 1968], No. 54163/69. Heading H2A. An electric motor includes a wound stator 20, a low-inertia rotor comprising two cup-shaped members, as 32, 34, spaced axially on a shaft, and a stationary permanent magnet 52 disposed between the cup-shaped members. In the double-rotor stepping motor shown there are two pairs of laminated cup-shaped rotor members 32, 34 and 36, 38. The members of each pair are spaced apart by an aluminium spacer 40, 42, the outer members 32, 38 being riveted to aluminium cups 46, 48 and the two inner members 34, 36 being separated by, and secured with epoxy to, a spacer disc 44. The laminated stator core 20 is disposed within a casing 10, 14, 15 and has a number of wound poles, these poles and the rotor members being provided with grooves defining spaced teeth. Annular, alnico permanent magnets 52, 54 positioned between each pair of rotor members 32, 34 and 36, 38 are supported from casing end cover 15 by means of aluminium support ring 68 and bars 64, the positions of the magnets relative to the rotor being adjustable to allow adjustment of air gaps 56.