公开(公告)号：DE3275617D1

公开(公告)日：1987-04-09

申请号：DE3275617

申请日：1982-12-14

Applicant: IBM

Inventor： BRENDE ARTHUR PAUL ,  LUOMA RICHARD WILLIAM

IPC: H02K33/18 ,  G11B5/54 ,  H02K41/035 ,  G11B21/02

Abstract: The magnetic head actuator includes a substantially totally enclosed self-shielding voice coil linear motor which includes a continuous, cylindrical permanent magnet (18) of flexible material which is sealed against the inner cylindrical wall of the outer core (11) by a flared copper sleeve (29) that also serves as a non-magnetic, conductive shorted turn to reduce instantaneous inductance of the drive coil (35). An annular reluctance gap in the outer core provides symmetrical distribution of the permanent magnet flux.