公开(公告)号：US11430472B1

公开(公告)日：2022-08-30

申请号：US17528296

申请日：2021-11-17

Applicant: Seagate Technology LLC

Inventor： YiChao Ma ,  Xiong Liu ,  Gordon Harwood ,  Yongjie Tang

IPC: G11B5/39 ,  G11B5/48 ,  H02K41/035

Abstract: A data storage device includes a ferromagnetic center pole, a drive coil for an actuator arm assembly, and a magnetic assembly surrounding the drive coil. The drive coil surrounds the center pole and has a top, a bottom, and first and second sides; the first side is attached to the actuator arm assembly. The magnetic assembly includes a top magnet disposed above and spaced from the center pole, a bottom magnet disposed below and spaced from the center pole, and a side magnet disposed proximate the second side of the coil and spaced from the center pole. In another embodiment, a linear actuator comprises a ferromagnetic center pole, a drive coil supported for linear motion on a rail, and a magnetic assembly. A method including linearly moving a drive coil along a center pole by a magnetic field is also described.