Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Hitachi Car Engineering Co., Ltd.

Other

Hitachi Metals, Ltd.

Hitachi Astemo Ltd.

Yutaka Matsunobu

Fumio Tajima

Shouichi Kawamata

Osamu Koizumi

Suetaro Shibukawa

Keiji Oda

Takashi Yasuhara

Takashi Kobayashi

Noriaki Hino

Masashi Kitamura

Yasuyuki Saito

Shigeru Kakugawa

Takashi Ishigami

Matahiro Komuro

Yuichi Satsu

Akinori Kamiya

Shinji Sugimoto

Ryoso Masaki

Kenichi Nakayama

Sanshiro Obara

Satoshi Kikuchi

Takao Imagawa

Koji Obata

Satoshi Yamamura

Hidetoshi Koka

Hiroyuki Suzuki

Hideki Nakamura

Satoru Kaneko

Shigeki Morinaga

Norio Takeda

Tomohiro Fukuda

Katsuhiro Hoshino

Kiyoshi Yamaguchi

Makoto Katagishi

Yoshimi Mori

Yuichiro Tanaka

Yukinori Taneda

Takayuki Koizumi

Hiromitsu Okamoto

Mitsuaki Mirumachi

Akihito Nakahara

Hakaru Sasaki

Hiromichi Hiramatsu

Takashi Genmoto

Masahiko Honma

Shuichi Terakado

Takahito Muraki

Shinichiro Yokoyama

Kanako Nemoto

Sadahiro Hamahata

Shoichi Kawamata

Hideaki Mori

An object of the invention is to reduce a torque pulsation. A control device of a rotary electric machine according to the invention includes a sinusoidal wave generation circuit which generates a sinusoidal wave signal according to a magnetic pole position of a rotor of the rotary electric machine, a current command circuit which generates a speed command, a torque command based on actual speed information, and a current command on the basis of the sinusoidal wave signal, and a current control circuit which controls an inverter circuit interposed between a stator winding and a DC power source to make a sinusoidal current flow to the stator winding on the basis of the current command and a current detection signal of the stator winding of the rotary electric machine, wherein the current control circuit periodically changes a current phase of the sinusoidal current when the rotary electric machine is driven by a predetermined torque and a predetermined rotation frequency.

Control device of rotary electric machine and control method of the same

A stator includes: multi-phase stator coils each having a salient pole concentrated winding; a stator iron core formed with a plurality of teeth around which the multi-phase stator coils are wound; and a plurality of connection rings configured to connect each of the multi-phase stator coils, wherein a winding end position of each of the multi-phase stator coils is disposed closest to the corresponding connection ring among the plurality of connection rings.

Stator and rotating electric machine

The coil ends in a rotating electric machine are to be made smaller in size. A stator coilinserted into a slotin a stator of a rotating electric machine is formed with segment coilsconnected to one another. In the stator coil, the segment coilseach include an insulating coated portion coated with an insulating coating, and a slitor a recess is formed in the insulating coated portion of each of the segment coilsat a coil end. The slitor the recess is preferably formed between a diagonal conductor portionD and a conductor-end straight portionE of each segment coil

Stator coil, stator including said stator coil, and rotating electric machine including said stator

An object is to provide a rotary electric machine capable of suppressing degradation of strength in high-speed rotation and reducing a torque ripple. A rotor of a rotary electric machine according to the present invention includes a rotor core provided with a magnet insertion hole that forms a space into which a permanent magnet is inserted and a non-magnetic portion facing the space to form a part of the magnet insertion hole, wherein the non-magnetic portion is provided asymmetrically with respect to a d-axis.

Rotor of rotary electric machine and rotary electric machine using the same

A resin composition () containing the following is prepared: a base unsaturated-polyester resin and/or a base vinyl-ester resin; a base radical-polymerizable monomer; a radical-polymerizable monomer having a thermally latent isocyanate group; a photo-radical polymerization initiator; and an alkylborane and/or an alkoxyamine derivative. A stator coil () in a stator () in a dynamo-electric machine () is coated using said resin composition () only, i.e. just the one resin composition. An insulated coated section (A) and a conductor-exposing section (B) of a join-side coil end () are also coated using said resin composition ().

Member for dynamo-electric machine, dynamo-electric machine, and resin composition

A rotating electric machine allowing a rotor and a stator thereof to assume any of various numbers of poles and any of various numbers of slots and enabling a reduction in vibration and noise is provided. The rotating electric machine according to the present invention includes a stator having a plurality of teeth and a plurality of slots, which is configured so that the shape of the front ends of the teeth and the opening width of the slots are made to change cyclically F times along the circumferential direction (F is a natural number equal to or greater than 2).

Rotating electric machine and electrically driven vehicle

A permanent magnet rotating electrical machine includes a rotor which has permanent magnets buried in a plurality of permanent magnet insertion slots that are provided in a rotor core, and the rotor is rotatably supported by a rotary shaft with a gap on the inner peripheral side of a stator. When the axis of magnetic flux for the permanent magnet is set as a d-axis and the position deviated from the d-axis by electrical angle of 90&#xb0; is set as a q-axis, the permanent magnet insertion slot is located on the q-axis and a first permanent magnet magnetized in the direction orthogonal to the q-axis is buried in the permanent magnet insertion slot. The permanent magnet insertion slot is located on the d-axis and a second permanent magnet magnetized in the direction parallel to the d-axis is buried in the permanent magnet insertion slot, while at least one or more third permanent magnets buried in the permanent magnet insertion slots are provided between the first permanent magnet and the second permanent magnet. Thereby, the environmental load discharged from a motor vehicle is reduced.

Permanent magnet rotating electrical machine and a motor vehicle using same

Provided is a rotating electric machine that combines high efficiency and high strength reliability. The rotating electric machine includes: a stator having a coil and a stator core; and a rotor opposed to the stator with a gap intervening between the rotor and the stator, the rotor having permanent magnetsand a rotor core. The rotor is configured such that the permanent magnets are buried in V-shape at hole-shaped slotsdisposed in the rotor core to form one pole, and the pole is formed in plurality in a circumferential direction. Each of the slots is an open slot partially opened toward an outer circumference of the rotor core. The slot is provided with a hook-shaped structureto support corresponding one of the permanent magnets in an open portion thereof.

Rotating electric machine including rotor core with slots having protrusions

A rotating electrical machine includes a stator and a rotor. The stator winding includes a plurality of conductor segments inserted through the slots from one end surface of the stator core with end portions of the conductor segments projecting out beyond another end surface of the stator core. The conductor segments include an undeformed portion, a plastically deformed portion formed at the end portions thereof and a tapered portion. The plastically deformed portion has a dimension of the plastically deformed portion along a circumferential direction that is greater than a dimension of the undeformed portion along the circumferential direction and so that a dimension of the plastically deformed portion along a radial direction is smaller than a dimension of the undeformed portion along the radial direction. The conductor segments are welded together at tops of the plastically deformed portions thereof.

Rotating electrical machine and method for manufacturing rotating electrical machine

A stator includes: a stator core with N pieces of slots ranging along an axial direction, which are formed side-by-side along a circumferential direction; and a stator winding installed in the slots at the stator winding. The stator winding includes a plurality of winding groups, each made up with N pieces of lap-wound coils each formed by winding a conductor wire a plurality of times. The winding groups are disposed in a plurality of layers set side-by-side along a radial direction at the stator core. One coil side at each of the lap-wound coils is inserted in a specific slot on an inner side along the radial direction in a specific layer and another coil side of the lap-wound coil is inserted in another slot on an outer side along the radial direction in the specific layer.

A gear-integrated electric motor is provided with a motor () generating a driving force by input of electricity, a gear mechanism () converting the driving force of the motor, and a housing () containing the motor and the gear mechanism, and used in a horizontal position in which a motor shaft () and a gear output shaft () become substantially horizontal. The gear-integrated electric motor includes at least one heat pipe () which has an evaporation portion () disposed in a motor area of the housing, and a condensation portion () disposed in a gear mechanism area of the housing and higher than the evaporation portion with respect to the vertical direction in the horizontal position.

Gear-integrated electric motor and electric vehicle

A rotating electric machine for an electric vehicle, installed in a vehicle and driven by an inverter power source, includes: a partial discharge measuring device that measures partial discharges occurring in insulated areas between windings, between phases and between the rotating electric machine and a ground.

Rotating electric machine for electric vehicle, drive control device and insulation diagnosis method

A rotating electric machine for vehicular use includes: a stator that includes a stator core and a stator winding wound at the stator core; and a rotor that is rotatably disposed relative to the stator and includes a rotor core formed by laminating a plurality of electromagnetic steel sheets with a plurality of magnet insertion holes formed therein and includes a plurality of permanent magnets each held in each of the plurality of magnet insertion holes to form a magnetic pole. Each of the plurality of permanent magnets extends along a rotor axis and is formed in a shape assuming at least two different lengths along a circumference of the rotor.

Rotating electric machine for vehicular use

A permanent magnet rotating electric machine comprises a stator having stator windings wound round a stator iron core and a permanent magnet rotor having a plurality of inserted permanent magnets in which the polarity is alternately arranged in the peripheral direction in the rotor iron core. The rotor iron core of the permanent magnets is composed of magnetic pole pieces, auxiliary magnetic poles, and a stator yoke, and furthermore has concavities formed on the air gap face of the magnetic pole pieces of the rotor iron core of the permanent magnets, gently tilting from the central part of the magnetic poles to the end thereof. In a permanent magnet rotating electric machine, effects of iron loss are reduced, and an electric car using highly efficient permanent magnet rotating electric machine are realized.

Rotating electric machine having rotor embedded-permanent-magnets with inner-end magnetic gaps and outer-end magnetic gaps, and electric car using the same electric machine

A rotating electrical machine includes a stator including at least two element coils of the same phase each having a plurality of turns and connected to each other through a coil-to-coil connection wire, the element coils being arranged in adjacent slots, respectively; and a rotor rotatably provided to the stator through a gap. The element coils of the same phase are fitted in the adjacent slots so that wound around portions of the element coils partially overlap each other. The coil-to-coil connection wire connects at a coil end portion conductor wires extending from linear conductor wire portions of innermost wires of the element coils contained in the slots.

Rotating electrical machine having a compact stator

Growing community of inventors

Hitachinaka, Japan

Yutaka Matsunobu