Kabushiki Kaisha Toshiba

Toshiba Industrial Products Manufacturing Corporation

Toshiba Infrastructure Systems & Solutions Corporation

Other

Aishin Aw Co., Ltd.

Masakatsu Matsubara

Takashi Hanai

Norio Takahashi

Makoto Matsushita

Takeshi Araki

Wataru Ito

Masanori Arata

Yasuo Hirano

Motoyasu Mochizuki

Yusuke Matsuoka

Kazuto Sakai

Takashi Araki

Yutaka Hashiba

Mikio Takabatake

Yukihiko Kazao

Hideki Hisada

Masaru Kano

Nobutake Aikura

Yoichi Seo

Masanori Ohashi

Masahiko Yamashiki

Tadashi Tokumasu

Daisuke Misu

Katsutoku Takeuchi

Ken Takeda

Yoshio Hashidate

Hiroaki Makino

Naoya Sasaki

Fumiaki Ito

Daisuke Yamagishi

Akito Kondo

Hiroshi Morohashi

Kazuo Aoki

Akihito Kondo

Nobutaka Aikura

Toshio Innan

Akito Kondou

According to an embodiment, an embedded magnet rotor comprises: a rotor shaft, a rotor core having permanent magnet housing spaces; and flat plate-shaped permanent magnets. Permanent magnet housing spaces each extend more radially outward than a position where the permanent magnet is held by a magnet holding outer projection and each have a communication opening communicating with a gap space. A radial thickness of each of the two chips sandwiching the communication opening and a circumferential width of the communication opening are in such a dimensional relation as to prevent a fragment produced by break of the permanent magnet from protruding from the communication opening and coming into contact with the stator.

Embedded magnet rotor and rotary electric machine

According to one embodiment, a first permanent magnet and a second permanent magnet are disposed in each magnetic pole of a rotor core. When angular coordinates of intersections of a flux line in a d-axial direction passing an outer end Aof the first permanent magnet, a flux line in the d-axial direction passing through an inner end Aof the first permanent magnet, a flux line in the d-axial direction passing an outer end Bof the second permanent magnet, a flux line in the d-axial direction passing an inner end Bof the second permanent magnet and a circumscribing circle of the rotor core are respectively defined as θ, θ, θand θ, the θ, θ, θand θsatisfy a formula (−34/p<(θ-θ)<22/p, −34/p<(θ−θ)<22/p).

Permanent magnet rotary electric machine including flux barriers shaped along flux lines

According to one embodiment, a rotor core satisfies a relationship: WW&#x2264;(AA)/AWhere, Arepresents an area of a region defined by a polar central axis, an outer circumferential surface of the rotor core and a first imaginary linear line extending on an outer circumferential-side long edge of an embedding hole, Arepresents an area of a region defined by the polar central axis, a q-axis, the outer circumferential surface of the rotor core, a second imaginary linear line extending on an inner circumferential-side long edge of the embedding hole, a third imaginary linear line extending on a first edge of the cavity hole, Wrepresents a half-width of a first bridge portion, and Wrepresents a half-width of the second bridge portion.

Rotary electric machine

According to one embodiment, a rotor includes a rotor core including magnetic poles arranged in a circumferential direction, a cavity formed on an axis q and extending toward a central axis, and a flux barrier band formed in the magnetic pole between a pair of the cavities to cross an axis d and including a first bridge part facing one cavity, a second bridge part facing the other cavity, and a magnet embedding hole formed between the first and the second bridge parts, a first permanent magnet formed of a fixed magnetic force magnet and disposed in the magnet embedding hole to be adjacent to the first bridge part, and a second permanent magnet formed of a variable magnetic force magnet and disposed in the magnet embedding hole to be adjacent to the second bridge part.

Rotor and rotary electric machine

A rotary electric device includes a stator, and a rotor including a rotor core having magnetic poles and permanent magnets at the magnetic poles. Each of two embedding holes in each magnetic pole includes a loading region in which the permanent magnet is loaded, an inner periphery-side gap, and an outer periphery-side gap. Defining D as the minimum distance from the outer periphery-side gap to an outer peripheral surface of the rotor core, Was the width of a teeth of the stator, H0 as the sum of the magnetomotive forces generated in the portion corresponding to a magnetic pole angle &#x398; in one magnetic pole, and H1 as the magnetomotive force generated in one tooth, the rotor core is formed such that D&#x2265;W&#xd7;(H0/H1).

Rotary electric device

According to one embodiment, a rotor of an electric rotating machine includes a shaft, a rotor core, and a plurality of permanent magnets. Two first permanent magnets are arranged in line symmetry with a pole center and are arranged gradually away from the pole center as the two first permanent magnets extend from first ends toward second ends thereof. Two second permanent magnets are arranged in line symmetry with the pole center and are arranged gradually away from the pole center as the two second permanent magnets extend from third ends toward fourth ends thereof. Angles &#x3b8;are set to satisfy the relationships of &#x3b8;, and 70 degrees&#x2264;&#x3b8;&#x2264;110 degrees.

Rotor of electric rotating machine

A stator of a rotating electrical machine includes a stator core, plural stator coil groups constituting plural phases, plural pieces of interphase insulation paper for insulation of coils belonging to different phases, and plural connecting strips formed integrally with the interphase insulation paper pieces. Each interphase insulation paper piece has ends inserted between coil ends of unit coils belonging to an identical phase thereby to function as interphase insulation paper for insulation of coils belonging to the identical phase. Each interphase insulation paper piece for insulation of coils belonging to the different phases, functioning as the interphase insulation paper piece for insulation of coils of the identical phase, insulates between coil ends of the first unit coils of respective first and second series circuits constituting the inner circumference side phase and a coil end of the unit coil constituting the outer circumference side phase.

Stator of rotating electrical machine and rotating electrical machine

A stator of rotating electrical machine includes a stator core and stator coils. The stator coils have n number (where n&#x2267;6) unit coils, a first coil group and a second coil group. The unit coils of the first coil group include a first unit coil located nearest the first power supply terminal. The unit coils of the first coil group include a second unit coil. The unit coils of the first coil group include a third unit coil located third nearest the first power supply terminal and adjacent to the second unit coil of the second coil group. The unit coils of the second coil group include a third unit coil located third nearest the second power supply terminal and adjacent to the second unit coil of the first coil group.

A permanent magnet type rotating electrical machine includes a rotor having a rotor core. Magnet holes circumferentially arranged at regular intervals in the rotor core include pairs of first magnet holes and pairs of second magnet holes. Each pair of first magnet holes are symmetric with respect to an imaginary line extending through a rotor core center. Each pair of second magnet holes are located on a radially inner side of the rotor core and are symmetric with respect to the imaginary line. Each pair of second magnet holes are located on an inner circumferential side of the paired first magnet holes with respect to a radial direction of the rotor core. A first magnet angle made by permanent magnets located in each pair of first magnet holes is larger than a second magnet angle made by permanent magnets located in each pair of second magnet holes.

Permanent magnet type rotating electrical machine

A rotor for a rotating electrical machine suppresses demagnetization of permanent magnets without deteriorating motor characteristics, is low-cost, and is highly reliable. The rotor has a plurality of rotor cores that are stacked together, a plurality of permanent magnets axially divided by the rotor cores and circumferentially arranged on each of the rotor cores, to circumferentially form magnetic irregularities, and a rotor blank made of nonmagnetic material arranged between those of the rotor cores that are adjacent to each other.

Rotor for rotating electrical machine

A rotor for an electric rotating machine includes d-axis through holes located on respective d-axes, hollow shafts formed in both axial sides of a rotating shaft not inserted into a rotor core, presser plates mounted on both axial ends of the rotor core, cooling grooves formed in faces of the presser plates in contact with the rotor core, a plurality of presser plate refrigerant outlet holes in the presser plates, the presser plate refrigerant outlet holes of one of the presser plates having diameters different from diameters of the presser plate refrigerant outlet holes of one of the other presser plates, and a refrigerant channel formed so that a refrigerant supplied into one of the hollow shafts of the rotating shaft flows through the refrigerant channel and further through the hollow shaft wall hole of said one hollow shaft and the radial grooves of the respective presser plates.

Cooling structure for rotor core in electric rotating machine

For an electrical reluctance rotary machine, a stator has a winding as an armature, and a rotor has permanent magnet implanting slots provided in a rotor core at lateral sides magnetic poles configured to produce reluctance torque along directions of magnetic flux passing through the magnetic poles to produce reluctance torque, and permanent magnets inserted in the permanent magnet implanting slots so as to cancel magnetic flux of the armature intersecting that magnetic flux, to control a magnetic field leaking at ends of the magnetic poles, having circumferential magnetic unevenness. The electrical reluctance rotary machine is configured to meet a relationship, such that where W[mm] is a width of permanent magnet, R [mm] is a radius of the rotor, and P is the number of poles.

Permanent-magnet reluctance electrical rotary machine

Included are a ring-shaped stator and a ring-shaped rotor arranged inside the stator; the stator includes a stator core with armature windings; the rotor includes a rotor core in which a plurality of permanent magnets are inserted and cooling holes are formed, a coolant flowing in each of the cooling holes; and each of the cooling holes is formed so as to have a sectional view which is a convex toward the outer periphery thereof.

Rotating electrical machine

A neutral-point terminal device for use with a neutral point side bundle of wires in a polyphase winding of a dynamoelectric machine includes a metal sleeve and an insulating cap covering the metal sleeve. The metal sleeve is covered by the insulating cap so that distal ends of the bundled neutral point side wires remain in an interior of the metal sleeve. The metal sleeve is then pressurized thereby to be deformed so as to be secured to the distal ends of the bundled wires.

Neutral-point terminal device for dynamoelectric machine

A rotor for a reluctance type rotating machine includes a rotor core formed by stacking a number of annular core materials each of which includes magnetic concave and convex portions. The rotor core has two keys which are formed at two positions on an inner circumference of the rotor core. The positions are spaced 180 degrees apart from each other with respect to the rotor core. The rotor core is divided into a plurality of blocks and the core materials constituting at least one block have the magnetic concave and convex portions shifted by a predetermined angle relative to the core materials constituting the other or another block on the basis of a center line passing through the keys. A whole or part of the core materials of at least one block are located circumferentially 180 degrees apart form the core materials constituting the other or another block.

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Mie, Japan

Masakatsu Matsubara