Nidec Corporation

Murata Manufacturing Co., Ltd.

Nidec-Shimpo Corporation

Takeshi Honda

Hiroshi Kitagaki

Yasuaki Nakahara

Takayuki Migita

Hirofumi Muto

Hisashi Fujihara

Osamu Fujimoto

Keisuke Saito

Tsuyoshi Nakamura

Tadaaki Fujinaga

Junichi Uno

Yosuke Tanaka

Tomoya Ueda

Yosuke Yamada

Takashi Shiraishi

Akira Sasaki

Masayuki Otani

Hironori Shibata

Takayuki Sawada

Kazuyoshi Koga

Takafumi Maeda

Nobuyuki Kita

Haruo Michishita

Haruki Yoshimatsu

Yuta Kimura

Takumi Tominaga

Hideki Tsuji

Yuya Danjo

Tetsuya Iwakuro

A rotor includes core plates, a hole, and a magnet in the hole. The core plates include a first core plate and a second core plate frontward of the first core plate. The first core plate includes a first hole, a first protrusion protruding inward of the first hole, and a first portion located in an opposite direction to a protrusion direction of the first protrusion as viewed from the axial direction and permitting deformation of the first protrusion in the opposite direction. The second core plate includes a second hole, and at least one of a recess recessed in the opposite direction and overlapping the first protrusion as viewed in the axial direction, or a second portion located in the opposite direction with respect to the first protrusion as viewed in the axial direction and permitting deformation of an inner surface of the second hole in the opposite direction.

Rotor, IPM motor including same, and rotor manufacturing method

A rotating electrical machine according to one aspect of the present invention includes: a rotor rotatable about a central axis; and a stator located radially outside the rotor. The rotor includes: a rotor core that includes a plurality of electromagnetic steel plates laminated in an axial direction and that has a plurality of accommodation holes; and a plurality of magnets respectively accommodated in the plurality of accommodation holes. The rotor core includes: a first recess recessed from a first core end face on a first axial side to a second axial side; a first swaged part provided on a bottom surface of the first recess; and a first protrusion that protrudes toward each of the magnets in a direction in which an inner peripheral edge of each of the accommodation holes intersects an axial direction, the first protrusion butting against a side face of the magnet.

Rotating electrical machine

A stator core includes a core back having an annular shape around a central axis, teeth extending outward from the core back in a radial direction, and an inner peripheral surface located inside the core back in the radial direction and extending from an upper end to a lower end of the core back around the central axis. The core back includes a plastically deformable portion having an annular shape around the central axis and disposed below the core back in the axial direction. At least a portion of the plastically deformable portion has a different distance from the central axis than another portion of the core back.

Stator core, rotor core, and motor

A method of manufacturing a rotor includes forming plates each including a scrap portion that has a center hole and core plate portions that are disposed continuously with the scrap portion on an inner side of the center hole and that each defines a portion of a corresponding one of the outer cores forming a multilayer body including the outer cores by stacking the plates, setting at least a portion of the multilayer body and a portion of the inner core in a mold with a gap therebetween in the radial direction, forming a molded body by pouring a molten filling material into a gap in the mold and forming the filling section, at least a portion of the filling section being positioned between the outer cores, and separating the scrap portion and the core plate portions from each other.

Method of manufacturing rotor, rotor, and motor

A method of manufacturing a rotor core, the method including laminating first laminated steel plates in an axial direction. The first laminated steel plates each include a plurality of flake portions arranged in a circumferential direction with gaps between each other and a plurality of protrusions protruding radially outward from an outer side surface of a base portion and each having at least a portion located in the gap between the flake portions. The method further includes fixing the base portions to each other and fixing the flake portions to each other. The method further includes removing the protrusions of the laminated steel plates radially outward.

Rotor core with concave portions between flake portions and base portions with dimensions

A method for manufacturing a battery is provided. The method includes suctioning a part of a strip-shaped separator in a plurality of holes of a winding core in a peripheral surface of the winding core; preparing a wound body by winding strip-shaped positive and negative electrodes along with the strip-shaped separator around the winding core; and preparing an electrode body by releasing the suction in the holes and pulling out the winding core from the wound body, in which the battery includes a battery container configured to accommodate the electrode body, the holes are communicated inside with the winging core having a hollow structure, and the winding core has an outside diameter of 2 mm or less.

Method for manufacturing battery, battery, and winding device

A rotor includes a rotor core in which magnetic steel plates widening in a radial direction with respect to a central axis of the rotor core are laminated in an axial direction, and magnets provided to the rotor core. Each of the magnetic steel plates includes a base portion positioned outside the central axis in the radial direction and piece-shaped portions each spaced by a gap from an outer side in the radial direction of the base portion and arranged in a circumferential direction of the base portion at predetermined intervals. The magnets are positioned at the gaps and arranged in the circumferential direction at predetermined intervals, a length in the radial direction from a central portion of the magnet in the circumferential direction is a central portion length in a cross section perpendicular to the axial direction, a length in the radial direction from an end portion of the magnet in the circumferential direction is an end portion length, the central portion length and the end portion length are lengths in parallel or substantially in parallel, and the central portion length is greater than the end portion length.

Rotor and motor

A manufacturing method of a motor core includes laminating in an axial direction steel plates extending in a radial direction with respect to a central axis, each of the laminate steel plates including a base portion on a radially outer side of the central axis, annular portions separately disposed on a radially outer side of the base portion with penetrating portions therebetween, and connecting portions at predetermined intervals in a circumferential direction to extend in the radial direction and connect the base portion and the annular portions, the annular portions including coupling portions adjacent to both circumferential sides of the connecting portions, and cutting at least one of the two coupling portions adjacent to one connecting portion in the circumferential direction from an outer side to an inner side of the laminate steel plates in the radial direction with respect to the laminate steel plates that are laminated.

Manufacturing method of motor core, manufacturing method of rotor core, and manufacturing method of rotor

A rotor includes a rotor core in which laminate steel plates extending in a radial direction with respect to a central axis are laminated in an axial direction, and magnets are inserted into the rotor core. Each of the laminate steel plates includes a base portion positioned on a radially outer side of the central axis, and pieces separately disposed on a radially outer side of the base portion with penetrating portions therebetween, and arranged side by side at predetermined intervals in a circumferential direction. The magnets are inserted into the penetrating portions and arranged side by side at predetermined intervals in the circumferential direction. Space portions are provided between the magnets adjacent to each other in the circumferential direction. A circumferential length of the pieces is shorter than a circumferential length of the magnets.

A rotor includes a rotor core including laminated thin plate cores. A single thin plate core includes an inner plate portion defining a portion of an inner core portion and outer plate portions defining a portion of an outer core portion. At least some of the laminated thin plate cores include a connecting portion. A number of connecting portion is one or a plurality, and, when the number of connecting portions is a plurality, the connecting portions at positions other than both left and right sides of each other in a circumferential direction, and, in plan view, the thin plate core includes the connecting portion at a position different from that of a connecting portion in another thin plate core adjacent in an axial direction.

Rotor, motor, and rotor manufacturing method

A laminated core manufacturing method includes punching a center hole in a processing region, molding split stator piece portions adjacently in a circumferential direction, and pushing back and molding the split stator piece portions. In the molding the split stator piece portions, the split stator piece portion is extruded in parallel with the workpiece.

Laminated core manufacturing method

A rotor core includes first and second laminate steel plates extending in a radial direction with respect to a central axis. The first laminate steel plate includes a first base portion positioned on a radially outer side of the central axis, and pieces separately positioned on a radially outer side of the first base portion with penetrating portions therebetween, and disposed at predetermined intervals in a circumferential direction. The second laminated steel sheet includes a second base portion positioned on a radially outer side of the central axis, and annular portions separately disposed on a radially outer side of the second base portion with penetrating portions therebetween, and extending in a circumferential direction. The rotor core is defined by the first laminate steel plates and at least one of the second laminate steel plates laminated in an axial direction.

Rotor core, rotor and motor

A rotor core includes laminate steel plates extending in a radial direction with respect to a central axis. The laminate steel plates each include a base portion on a radially outer side of the central axis, and pieces separately disposed on a radially outer side of the base portion with penetrating portions therebetween, and arranged side by side at predetermined intervals in a circumferential direction. The laminate steel plates are laminated in an axial direction. The laminated steel plate at an upper end in the axial direction includes at least one of an outward projection extending radially outward from an outer edge portion of the base portion and an inward projection extending radially inward from an inner edge portion of the piece, and the laminated steel plate at a lower end in the axial direction includes an intervening portion between the base portion and the piece portion.

Rotor core, rotor, motor, manufacturing method of rotor core, and manufacturing method of rotor

A stator includes core pieces in which at least first and second laminate members are laminated, the first laminate member includes a first tooth portion and a first core back portion, the second laminate member includes a second tooth portion and a second core back portion, the first core back portion includes a first protrusion on one side thereof in a circumferential direction and a first recess on the other side thereof in the circumferential direction, the second core back portion includes a second recess on one side thereof in a circumferential direction and a second protrusion on the other side thereof in the circumferential direction, and an area of a region in which the first and second core back portions of the core piece adjacent thereto overlap in a lamination direction is greater than a circumferential cross-sectional area of the first core back portion circumferentially inward from the first protrusion.

Stator, stator manufacturing method and motor

A motor includes a rotor that rotates centered on a central axis extending in an axial direction, and a stator. The stator includes a stator iron core in which a plurality of laminated iron cores each including a tooth portion extending in a radial direction are arranged in a circumferential direction, and coils wound around the tooth portion. The laminated iron core includes a plurality of flat plate-shaped iron core pieces laminated in a plate thickness direction. The iron core piece is made of a non-oriented electromagnetic steel plate. A rolling direction of the iron core piece is inclined with respect to the radial direction. The laminated iron core is preferably formed by laminating the iron core pieces to be arranged with a same inclination. At least a pair of the laminated iron cores adjacent to each other in the circumferential direction has inclinations opposite to each other.

Growing community of inventors

Kyoto, Japan

Takeshi Honda