公开(公告)号：US20190181707A1

公开(公告)日：2019-06-13

申请号：US16207100

申请日：2018-12-01

Applicant: FANUC CORPORATION

Inventor： Shinobu TAKANO ,  Takafumi KAJIYA ,  Kenji KAWAI ,  Hisashi MAEDA

IPC: H02K1/30 ,  H02K1/20 ,  H02K1/27 ,  H02K7/08

Abstract: A rotor is configured such that the rotor includes: a rotary tube whose inner circumferential surface is tapered and which is fitted to a rotary shaft whose outer circumferential surface is tapered; a permanent magnet which is arranged on the outer circumferential side of the rotary tube; and a sheath tube which is fitted to the outer circumferential side of the permanent magnet so as to cover the permanent magnet, and that as the outside diameter of a multilayer member formed with the rotary tube and the permanent magnet is reduced so as to be tapered along an axial direction, the interference of the sheath tube for the multilayer member is increased so as to be tapered along the axial direction.

公开(公告)号：US20200373802A1

公开(公告)日：2020-11-26

申请号：US16874080

申请日：2020-05-14

Applicant: FANUC CORPORATION

Inventor： Kenji KAWAI ,  Tatsuya OOI

IPC: H02K3/40

Abstract: A stator includes first exterior members that surround sides of outer circumferential portions of coil ends on both end sides of an iron core, second exterior members connected to the first exterior members, and which surround sides of end portions of the coil ends in the axial direction, and mold members that cover the coil ends and are placed in contact with the first exterior members and the second exterior members. Holes are formed in the second exterior member on one end side, and a surface that faces the mold member, of the second exterior member on the one end side, is inclined in a manner so that a thickness thereof becomes continuously thinner toward the holes.

公开(公告)号：US20190036404A1

公开(公告)日：2019-01-31

申请号：US16009252

申请日：2018-06-15

Applicant: FANUC CORPORATION

Inventor： Shinobu TAKANO ,  Takafumi KAJIYA ,  Kenji KAWAI

IPC: H02K1/30 ,  H02K1/27

Abstract: A rotor includes: a rotary member; permanent magnets in a plurality of columns which are arranged along the circumferential direction of the rotary member and each of which is divided into a plurality of permanent magnets in a rotary axis direction X of the rotary member; and a sheath tube which is fitted to the outer circumferential side of the permanent magnets, which covers the permanent magnets and which is formed of a fiber-reinforced plastic, and the sheath tube is divided, in the rotary axis direction X of the rotary member, by a division number which exceeds the division number of the permanent magnets.

公开(公告)号：US20170310168A1

公开(公告)日：2017-10-26

申请号：US15491482

申请日：2017-04-19

Applicant: FANUC CORPORATION

Inventor： Youhei ARIMATSU ,  Kenji KAWAI

IPC: H02K1/06 ,  H02K7/09

Abstract: To provide a rotating electrical machine which can be easily configured at low lost, and which can highly accurately maintain an axial position (position in a thrust direction) of a rotating shaft in a prearranged position, and a machine tool, to which the rotating electrical machine is applied. A rotating electrical machine includes: a stator including a stator core; and a rotor supported on a rotating shaft supported by way of a non-contact bearing. When a section, in which a torque generation member exists in an axial direction of the rotating electrical machine, is defined as a torque generation section, a first end and a second end of the stator core in the axial direction extend outwards in the axial direction from a first end and a second end of the torque generation section at the rotor side in the axial direction. According to one aspect of the present invention, a length of the first end and the second end of the stator core extending outwards in the axial direction, from the first end and the second end of the torque generation section at the rotor side in the axial direction, is longer than a magnetic gap length of the rotating electrical machine.

公开(公告)号：US20140062362A1

公开(公告)日：2014-03-06

申请号：US14019121

申请日：2013-09-05

Applicant: FANUC CORPORATION

Inventor： Kenji KAWAI

IPC: H02P3/22

CPC classification number: H02P3/22 ,  H02P29/662

Abstract: A maximum current value determination unit determines the maximum current value of a permanent magnet synchronous motor in order to prevent irreversible demagnetization of a permanent magnet of the permanent magnet synchronous motor that may occur by transient current occurring at the time of short-circuiting of three phases, based on one of a set of irreversible demagnetization causing current value corresponding to permanent magnet temperature and the transient current occurring at the time of the short-circuiting of three phases, and a set of irreversible demagnetization causing magnetic field intensity corresponding to the permanent magnet temperature and demagnetization field intensity of the permanent magnet of the permanent magnet synchronous motor occurring at the time of the short-circuiting of three phases. A current control unit controls the current of the permanent magnet synchronous motor so that the current value of the permanent magnet synchronous motor is less than the maximum current value.

Abstract translation: 最大电流值确定单元确定永磁同步电动机的最大电流值，以防止在三相短路时发生的瞬态电流可能发生的永磁同步电动机的永久磁铁的不可逆退磁 基于一组不可逆退磁，其导致与永磁体温度相对应的电流值和在三相短路时发生的瞬态电流，以及一组引起与永磁体相应的磁场强度的不可逆退磁 在三相短路时发生永磁同步电动机的永久磁铁的温度和退磁场强度。 电流控制单元控制永磁同步电动机的电流，使得永磁同步电动机的电流值小于最大电流值。