Mitsubishi Electric Corporation

Atsushi Sakaue

Hironori Tsuiki

Hiroyuki Akita

Masaya Inoue

Akira Hashimoto

Tatsuro Hino

Masashi Nakamura

Shogo Okamoto

Shinkichi Sawa

Kazunori Muto

Shinji Nishimura

Satoru Akutsu

Akihiro Yamamura

Sachiko Kawasaki

Kohei Egashira

Isao Sonoda

Yutaka Ikura

Ryuichi Kitora

Tetsuya Yokogawa

Takumi Nakaue

Aiko Nakano

Yoshihito Asao

Masatsugu Nakano

Hiroyuki Yasuda

Moriyuki Hazeyama

Shinichi Ito

Yuji Nakahara

Yoshihiro Harada

Kazuhisa Takashima

Shinichiro Yoshida

Takashi Umeda

Shuichi Tamura

Tadashi Murakami

Masaki Horii

Shinichi Okada

Ryuichi Takiguchi

Hiroki Shiota

Toyoaki Udo

Hirohisa Yokota

Ryuichi Shimomura

Koji Kawamura

Manabu Yoshinori

Takanori Komatsu

Kimiyasu Furusawa

Yutaro Shirai

Katsunori Oki

Naomi Kikuchi

Hisashi Namura

A rotary electric machine is installed such that a central axis of a rotating shaft is horizontal, and coolant suction apertures are formed at positions on a cylindrical portion of a frame that are vertically above first and second coil ends, and strip-shaped insulating papers are inserted such that a thickness direction is in a radial direction between radially adjacent conductor portions of portions of the conductor wire that constitute the first and second coil ends, and are disposed so as to extend circumferentially across positions that are vertically below the coolant suction apertures inside the first and second coil ends.

Rotary electric machine

A manufacturing method for a stator winding coil includes: a bulging portion forming step that forms a bulging portion on a conductor wire; a crank portion forming step that forms a crank portion on the central portion of the bulging portion; an oblique portion forming step that forms oblique portions on the conductor wire at two ends of the bulging portion; a rectilinear portion forming step that forms rectilinear portions on the conductor wire at opposite ends of the oblique portions from the bulging portion; and a circular arc forming step that forms the oblique portions into a circular arc shape after forming the rectilinear portions.

Manufacturing method for stator winding coil

Slot accommodation portions of single coils forming an armature coil are arranged so as to be stacked in the radial direction in a slot. On the anti-wire-connection side, a one-side extending portion which is a coil end extending from the slot accommodation portion in the first layer, and a one-side extending portion which is a coil end extending from the slot accommodation portion in the second layer, extend in the same direction. No insulation sheet is provided in intervals between coil ends extending in the same direction, such as the extending portions () and () and extending portions () and ().

Rotating electric machine

While lamination of steel sheets to be included in a stator core having a plurality of tooth portions is performed through swaging at yoke portions and through swaging at tooth portions, the stator core is formed in such a way as to include the tooth portion having a portion that is pressed into another steel sheet through swaging and the tooth portion having no portion that is pressed into another steel sheet through swaging.

Rotating electric machine including swaging portions for steel sheets of stator core

A stator winding is formed by mounting winding bodies individually into pairs of slots of a stator core separated by a predetermined number of slots, the winding bodies each being formed by winding a jointless, continuous conductor wire coated with insulation for m turns into a helical shape such that end portions of rectilinear portions are linked by coil ends, where m is a natural number that is greater than or equal to two, and the coil ends include a top portion that displaces by a predetermined amount in a radial direction at an approximately central portion between the linked rectilinear portions, the radial displacement at the top portions is approximately a&#xd7;d, where a is a natural number that is greater than or equal to 1 and less than or equal to (m&#x2212;1), and d is a radial thickness of the rectilinear portions.

Rotary electric machine with armature coil end top portions displaced in a radial direction

A tooth groove is provided at a border portion between a tooth body portion and a protrusion. The angle between a tooth body portion lateral face which is a lateral face in the circumferential direction of the tooth body portion and a tooth body portion stop portion which is a face, of the tooth groove, continued from the tooth body portion lateral face is the right angle or an acute angle. The protrusion is rotated toward the outer side in the circumferential direction, to bring a protrusion stop portion into close contact with the tooth body portion stop portion, the protrusion stop portion being an outer-circumferential-side lateral face of the protrusion, thereby forming a shoe in a tooth.

Method for manufacturing strator, method for manufacturing rotary electric machine, and iron-core block

The rotor includes: a rotor core having a plurality of insertion holes penetrating in an axial direction at intervals in a circumferential direction; and magnets respectively provided in the insertion holes. A space is formed between a hole inner side peripheral surface of each insertion hole and a magnet inner side peripheral surface of each magnet. An adhesion layer portion is formed between a hole outer side peripheral surface of each insertion hole and a magnet outer side peripheral surface of each magnet, and the hole outer side peripheral surface of each insertion hole and the magnet outer side peripheral surface of each magnet with which the adhesion layer portion contacts are formed in a flat-surface shape. A width in a radial direction of the space is longer than a width in the radial direction of the adhesion layer portion.

Rotor and rotating electric machine

A contour line on the outer circumferential side of each magnet hole in the first layer is formed to be an arc passing through a total of three intersections, i.e., an intersection of a d axis and a reference magnetic flux line which is a magnetic flux line as a reference positioned inward by a predetermined number of magnetic flux lines from the outer circumferential edge of a rotor core, and intersections of: the reference magnetic flux line; and sides at the circumferential ends of the magnet hole which are positioned inward by a bridge dimension from the outer circumferential edge of the rotor core. Thus, a rotary electric machine that enables maximum utilization of reluctance torque and magnet torque and suppression of torque ripple can be obtained with simple processing and low cost.

A stator of a rotating electrical machine includes: a plurality of annularly arranged stator cores; a stator winding attached to slots of the stator cores; and a shell () that retains the stator cores. In the stator of the rotating electrical machine, the ends of coil terminal wires (), () on the innermost circumferential side and the outermost circumferential side of each slot are oriented in the axial direction of the stator; and side surfaces of the ends of the terminal wires (), () are brought into contact with each other and are welded above the coil end () of the stator winding.

Rotating electrical machine stator

An iron core member has: first divided yoke portions; second divided yoke portions alternately arranged with the first divided yoke portions; a first tooth portion extending from one circumferential end of each first divided yoke portion, a second tooth portion extending from the other circumferential end; a third tooth portion extending from one circumferential end of the second divided yoke portion on the second tooth portion side, and a fourth tooth portion extending from the other circumferential end. A tooth end portion of the first tooth portion and a tooth end portion of the adjacent fourth tooth portion are integrally joined at a first tooth end joint portion, and a tooth end portion of the second tooth portion and a tooth end portion of the adjacent third tooth portion are integrally joined at a second tooth end joint portion, thereby providing one continuous sheet of the core member.

Iron core member with divided yoke and tooth portions with V-shaped end joint portions

Winding bodies are configured such that radially inner terminals of a conductor wire extend outward at a first axial end of an armature core from a radially innermost position inside slots, and radially outer terminals of the conductor wire extend outward at the first axial end of the armature core from a radially outermost position inside the slots, and respective phase windings of an armature winding are configured by directly joining together the radially inner terminals and by directly joining together the radially outer terminals of the winding bodies that constitute identical phases.

The armature winding is configured by mounting into slot pairs n types of winding bodies that are each configured by winding a conductor wire for m turns into a helical shape, where m is a natural number that is greater than or equal to two, the n types of winding bodies have different spacings between rectilinear portions that are linked by coil ends, are housed in n adjacent pairs of slot pairs, and are configured so as to be concentric, the coil ends include a top portion at an approximately central portion, and the radial displacement at the top portion is approximately a&#xd7;d, where a is a natural number that is greater than or equal to 1 and less than or equal to (m&#x2212;1), and d is a radial thickness of the rectilinear portions that are housed inside the slots.

A stator core for a rotating electrical machine includes an annular yoke portion; a tooth group fitted to an inner side of the yoke portion and formed such that both ends in a circumferential direction on an inner circumferential side of adjacent teeth are integrally connected with each other by a thin connection portion; and a slot for accommodating a stator winding. The yoke portion has grooves at regular intervals in an inner circumferential surface thereof and extending in an axial direction of the stator, the grooves each having a V shape such that a cross section thereof perpendicular to the axial direction opens toward an inner side of the stator core. Each tooth has, at an outer-circumferential-side end thereof, a fitting portion whose cross section perpendicular to the axial direction is formed in a wedge shape so as to allow the tooth to be fitted along the corresponding groove.

Stator core, stator, and rotating electrical machine

Coils that constitute an armature winding are produced by winding a conductor wire that has a rectangular cross section, the coils each include: four rectilinear portions that are inserted into a pair of slots; and three coil end portions that link the four rectilinear portions consecutively by each connecting together end portions of two selected rectilinear portions, the coils being mounted into the armature core so as to be arranged at a pitch of one slot in a circumferential direction, the coil end portions include: a bulging portion that protrudes axially outward in a convex shape; and oblique portions that link the two connected rectilinear portions and the bulging portion, the bulging portion has a crank portion that displaces radial positions of the two connected rectilinear portions by a set amount, and a cross-sectional area of the bulging portion is smaller than a cross-sectional area of the oblique portions.

Rotary electric machine and manufacturing method for coil of rotary electric machine

First and second winding bodies are each configured so as to have a helical shape by winding a conductor wire for m turns, where m is a natural number that is greater than or equal to two, an armature winding is configured by mounting two-lane winding bodies into respective pairs of slots, two-lane winding bodies being configured by assembling the first and second winding bodies, the coil ends include a top portion that displaces in a radial direction at a central portion, and the radial displacement at the top portion is a&#xd7;d, where a is a natural number that is greater than or equal to 2 and less than or equal to 2&#xd7;(m&#x2212;1), and d is a radial thickness of the rectilinear portions, 4&#xd7;m of the rectilinear portions being housed inside the slots so as to line up in single columns.

Rotary electric machine and method for manufacturing an armature that is used in the rotary electric machine

Growing community of inventors

Tokyo, Japan

Atsushi Sakaue