公开(公告)号：US10103593B2

公开(公告)日：2018-10-16

申请号：US15106496

申请日：2014-10-23

Applicant: National Institute of Technology ,  KYB Corporation

Inventor： Yoshiaki Kano ,  Kousuke Sato ,  Noriyuki Takahashi

IPC: H02K41/02 ,  H02K3/28 ,  H02K41/03 ,  H02K3/12

Abstract: A linear motor has a tubular body and a rod that penetrates the tubular body in an axial direction, and is configured to displace the tubular body and the rod relative to each other in the axial direction. The linear motor includes: 12n+1 (where n is a positive integer) teeth arranged in the axial direction so as to project from an inner peripheral surface of the tubular body; 12n slots respectively formed between adjacent teeth of the plurality of teeth; 12n coils respectively disposed in the slots; and a plurality of permanent magnets held in the rod so as to be arranged in the axial direction. The respective coils are formed by being wound around an axis of the rod in an identical direction, and the number of permanent magnets positioned in the tubular body is set to 8n.

公开(公告)号：US10224775B2

公开(公告)日：2019-03-05

申请号：US15110973

申请日：2014-10-23

Applicant: NATIONAL INSTITUTE OF TECHNOLOGY ,  KYB Corporation

Inventor： Yoshiaki Kano ,  Kousuke Sato ,  Noriyuki Takahashi

IPC: H02K3/28 ,  H02K41/03

Abstract: A linear motor that displaces a tubular body and a rod relative to each other in an axial direction includes teeth arranged in the axial direction so as to project from an inner peripheral surface of the tubular body, slots formed between adjacent teeth, coils disposed in the slots, and permanent magnets provided in the rod and arranged in the axial direction. The coils are constituted by one or more first phase coils, one or more second phase coils, and one or more third phase coils. The first, second, and third phase coils are provided in the axial direction such that the first phase coil and the second phase coil are disposed at respective ends the tubular body. A total number of coil windings of the third phase coils is set to be smaller than a total number of coil windings of the first phase coils and a total number of coil windings of the second phase coils.