公开(公告)号：US08737017B1

公开(公告)日：2014-05-27

申请号：US13804726

申请日：2013-03-14

Applicant: Nidec Corporation

Inventor： Hiroyuki Abe

IPC: G11B19/20

CPC classification number: H02K1/14 ,  G11B19/2009 ,  H02K1/146 ,  H02K3/18 ,  H02K21/22 ,  H02K29/03 ,  H02K2201/03

Abstract: A spindle motor of a disk drive apparatus includes a base unit, a stator core, a covered cylindrical rotor hub, a rotor magnet, and a bearing mechanism. The height of the stator core in an axial direction is about 50% or more and about 70% or less of the height of the stator. A torque constant Kt of torque generated between a stator and a rotor magnet is about 4 mN·m/A or more and about 6 mN·m/A or less. A motor constant Km is about 2 mN·m/(A·√Ω) or more and about 4 mN·m/(A·√Ω) or less.

Abstract translation: 盘驱动装置的主轴电动机包括基座单元，定子铁心，有盖圆柱形转子轮毂，转子磁铁和轴承机构。 定子铁芯在轴向上的高度约为定子高度的50％以上且约70％以下。 在定子和转子磁体之间产生的扭矩的转矩常数Kt为约4mN·m / A以上且约6mN·m / A以下。 电动机常数Km约为2mN·m /（A·√＆OHgr）以上且约4mN·m /（A·√＆OHgr））以下。

公开(公告)号：US10320258B2

公开(公告)日：2019-06-11

申请号：US15752618

申请日：2016-09-21

Applicant: Nidec Corporation

Inventor： Hiroyuki Abe

IPC: G11B19/20 ,  H02K3/52 ,  H02K3/50 ,  H02K1/14 ,  H02K1/27 ,  H02K1/30 ,  H02K3/18 ,  H02K7/08 ,  H02K15/00 ,  H02K15/02 ,  H02K15/095 ,  H02K21/22

Abstract: In this stator, a passage line extending in a circumferential direction is disposed in a circumferential gap between two circumferentially adjacent ones of coils. A lead wire continuous with a conducting wire defining one of the coils includes a bend portion being bent in the gap with the passage line serving as a supporting point; a led-out portion arranged to extend from the coil to one side in an axial direction to the bend portion; and a connection portion arranged to extend from the bend portion to another side in the axial direction. At least a portion of a portion of the lead wire which overlaps with the passage line when viewed in a radial direction is arranged at a radial position between the passage line and a core back. Thus, the lead wire is bent with the passage line serving as the supporting point to reverse the direction in which the lead wire runs in the axial direction, and this contributes to preventing a slackening of the connection portion of the lead wire from causing the lead wire to be slackened to the one side in the axial direction. This in turn reduces the likelihood that the lead wire will be brought into contact with a member arranged on the one side of the stator in the axial direction.

公开(公告)号：US08599517B1

公开(公告)日：2013-12-03

申请号：US13798278

申请日：2013-03-13

Applicant: Nidec Corporation

Inventor： Hiroyuki Abe

IPC: G11B19/20

CPC classification number: G11B19/2009

Abstract: A spindle motor of a disk drive apparatus includes a base unit, a stator, a covered cylindrical rotor hub, a rotor magnet, and a bearing mechanism. The rotor magnet is an Nd—Fe—B bond magnet. The thickness of the rotor magnet in the radial direction is about 0.7 mm or more and about 1.0 mm or less. The distance between the rotor magnet and the stator core in the radial direction is about 0.15 mm or more and about 0.20 mm or less. A torque constant Kt of torque generated between the stator and the rotor magnet is about 4 mN·m/A or more and about 6 mN·m/A or less. A motor constant Km is about 2 mN·m/(A·√Ω) or more and about 4 mN·m/(A·√Ω) or less.

Abstract translation: 盘驱动装置的主轴电动机包括基座单元，定子，有盖的圆柱形转子轮毂，转子磁体和轴承机构。 转子磁体是Nd-Fe-B键合磁体。 转子磁体在径向上的厚度为约0.7mm以上且约1.0mm以下。 转子磁铁与定子铁心的径向距离为0.15mm以上且0.20mm以下。 在定子和转子磁体之间产生的扭矩的转矩常数Kt为约4mN·m / A以上约6mN·m / A以下。 电动机常数Km为约2mN·m /（A·√Omega）以上且约4mN·m /（A·√Omega）以下。