公开(公告)号：US20200313473A1

公开(公告)日：2020-10-01

申请号：US16830979

申请日：2020-03-26

Applicant: Fanuc Corporation

Inventor： Yasuo Yamada

IPC: H02K1/14 ,  H02K1/02 ,  H02K1/26 ,  H02K1/18 ,  H02K1/16 ,  H02K3/28

Abstract: An electric motor includes a rotor; a first stator provided with a plurality of teeth, and a second stator stacked in an axial direction of the first stator, the teeth of the second rotor being disposed and aligned with the corresponding plurality of teeth of the first stator in the axial direction. The first and the second stator are formed of a plurality of split cores being split along a plurality of split surfaces. A position of each of the split surfaces of the second stator is displaced from a position of the corresponding one of the split surfaces of the first stator in the circumferential direction by an angle α (α=(2π/N)/2+n×(2π/N), where N is a least common multiple of the number of magnetic poles of the rotor and the number of split cores, and n is an integer).

公开(公告)号：US20240088733A1

公开(公告)日：2024-03-14

申请号：US18272829

申请日：2022-01-17

Applicant: Fanuc Corporation

Inventor： Yasuo Yamada

IPC: H02K1/28 ,  H02K1/278

CPC classification number: H02K1/28 ,  H02K1/278

Abstract: Provided are: a rotor provided with a magnetic end plate and a structure for suppressing magnetic flux leakage; and an electric motor having this rotor. The rotor has a rotor core of an approximately cylindrical shape, a plurality of magnets supported by the rotor core, and two end plates arranged at either end surface in the axial direction of the rotor core, the end plates being formed of a magnetic material. Each end plate has an approximately circular shape corresponding to the radial cross-section of the rotor core, and a circumferential portion of the end plate has, as seen in the axial direction, concave portions that partially cover the magnets, and convex portions that are positioned between the plurality of magnets and have larger dimensions in the radial direction than the concave portions.

公开(公告)号：US10691099B2

公开(公告)日：2020-06-23

申请号：US15915523

申请日：2018-03-08

Applicant: FANUC CORPORATION

Inventor： Yasuo Yamada

IPC: G06G7/48 ,  G05B19/404 ,  B23Q3/18

Abstract: A motor selection apparatus includes: a mechanical condition obtainment unit that obtains information pertaining to a distance between a center of mass of a workpiece and a rotation center of a motor; an operating pattern obtainment unit that obtains information pertaining to an operating pattern; a motor information obtainment unit that obtains information pertaining to instantaneous torque; an eccentric load torque calculation unit that calculates eccentric load torque, which is load torque acting on the motor in accordance with the rotation phase of the motor; an acceleration/deceleration torque calculation unit that calculates acceleration/deceleration torque; a required torque calculation unit that calculates a required torque from a sum of the eccentric load torque and the acceleration/deceleration torque; and a motor selection unit that determines whether a motor can be selected, based on whether the required torque is less than or equal to the instantaneous torque of the motor.

公开(公告)号：US10601268B2

公开(公告)日：2020-03-24

申请号：US15397838

申请日：2017-01-04

Applicant: FANUC CORPORATION

Inventor： Yasuo Yamada ,  Akira Nishifukumoto

IPC: H02K1/27 ,  H02K1/28 ,  H02K15/03 ,  H02K15/14

Abstract: A rotor capable of preventing a magnet or a cover tube from being damaged by contacting a mold of an injection machine during production. The rotor includes a rotor core, a plurality of magnets arranged on the outside of the rotor core in the radial direction, a cylindrical cover tube surrounding the plurality of magnets, and resin charged to a gap defined between an outer peripheral surface of the rotor core and an inner peripheral surface of the cover tube. An axial dimension of the rotor core is greater than an axial dimension of each magnet, and an axial dimension of the cover tube.

公开(公告)号：US11521105B2

公开(公告)日：2022-12-06

申请号：US15481575

申请日：2017-04-07

Applicant: FANUC CORPORATION

Inventor： Yohei Kamiya ,  Yasuo Yamada

IPC: G06N20/00 ,  G01M15/14 ,  G01N29/14 ,  G01N29/44 ,  G06N3/04 ,  G06N3/08 ,  G01M15/02 ,  G06N5/04 ,  H04L67/10

Abstract: A machine learning device which learns fault prediction of one of a main shaft of a machine tool and a motor driving the main shaft, including a state observation unit observing a state variable including at least one of data output from a motor controller controlling the motor, data output from a detector detecting a state of the motor, and data output from a measuring device measuring a state of the one of the main shaft and the motor; a determination data obtaining unit obtaining determination data upon determining one of whether a fault has occurred in the one of the main shaft and the motor and a degree of fault; and a learning unit learning the fault prediction of the one of the main shaft and the motor in accordance with a data set generated based on a combination of the state variable and the determination data.

公开(公告)号：US20180267501A1

公开(公告)日：2018-09-20

申请号：US15915523

申请日：2018-03-08

Applicant: FANUC CORPORATION

Inventor： Yasuo Yamada

IPC: G05B19/404 ,  B23Q3/18

Abstract: A motor selection apparatus includes: a mechanical condition obtainment unit that obtains information pertaining to a distance between a center of mass of a workpiece and a rotation center of a motor; an operating pattern obtainment unit that obtains information pertaining to an operating pattern; a motor information obtainment unit that obtains information pertaining to instantaneous torque; an eccentric load torque calculation unit that calculates eccentric load torque, which is load torque acting on the motor in accordance with the rotation phase of the motor; an acceleration/deceleration torque calculation unit that calculates acceleration/deceleration torque; a required torque calculation unit that calculates a required torque from a sum of the eccentric load torque and the acceleration/deceleration torque; and a motor selection unit that determines whether a motor can be selected, based on whether the required torque is less than or equal to the instantaneous torque of the motor.

公开(公告)号：US20190341819A1

公开(公告)日：2019-11-07

申请号：US16512814

申请日：2019-07-16

Applicant: FANUC CORPORATION

Inventor： Yasuo Yamada ,  Akira Nishifukumoto

IPC: H02K1/27 ,  H02K15/03 ,  H02K15/14

Abstract: A rotor capable of preventing a magnet or a cover tube from being damaged by contacting a mold of an injection machine during production. The rotor includes a rotor core, a plurality of magnets arranged on the outside of the rotor core in the radial direction, a cylindrical cover tube surrounding the plurality of magnets, and resin charged to a gap defined between an outer peripheral surface of the rotor core and an inner peripheral surface of the cover tube. An axial dimension of the rotor core is greater than an axial dimension of each magnet, and an axial dimension of the cover tube.

公开(公告)号：US20170201139A1

公开(公告)日：2017-07-13

申请号：US15397838

申请日：2017-01-04

Applicant: FANUC CORPORATION

Inventor： Yasuo Yamada ,  Akira Nishifukumoto

IPC: H02K1/27 ,  H02K15/14 ,  H02K15/03

Abstract: A rotor capable of preventing a magnet or a cover tube from being damaged by contacting a mold of an injection machine during production. The rotor includes a rotor core, a plurality of magnets arranged on the outside of the rotor core in the radial direction, a cylindrical cover tube surrounding the plurality of magnets, and resin charged to a gap defined between an outer peripheral surface of the rotor core and an inner peripheral surface of the cover tube. An axial dimension of the rotor core is greater than an axial dimension of each magnet, and an axial dimension of the cover tube.