Denso Corporation

Nippondenso Co., Ltd.

Atsushi Umeda

Shin Kusase

Tsutomu Shiga

Makoto Taniguchi

Hirohide Sato

Kouichi Ihata

Shigenobu Nakamura

Atsuo Ishizuka

Hitoshi Irie

Norihito Tokura

Hiroshi Ishida

Noriyasu Inomata

Saburo Hukaya

Takatoshi Inokuchi

Akiya Shichijyo

Kenzo Mitani

Junji Kawai

Akito Tamura

Seiji Hayashi

Akira Fukushima

Hiroaki Ishikawa

Ryosuke Utaka

Hiroaki Kajiura

Shinichi Matsubara

Nakato Murata

Yoshio Naka

Nobuo Isogai

Takafumi Tsuge

Yuichi Kudose

Masatoshi Togawa

Masatoshi Kohmura

Masaaki Iwata

Makoto Taniquchi

A rotating electric machine includes a field system having a magnet section and an armature having a multi-phase armature coil. The magnet section has easy axes of magnetization oriented to be more parallel to a d-axis at locations closer to the d-axis than at locations closer to a q-axis. The magnet section has an intrinsic coercive force higher than or equal to 400 [kA/m] and a residual flux density higher than or equal to 1.0 [T]. There are no inter-conductor members provided between electrical conductor sections of the armature coil. The armature coil includes a plurality of phase windings each of which is constituted of a plurality of partial windings. Each of the partial windings is formed of an electrical conductor that is multiply wound in the electrical conductor sections of the same phase. In each of the phase windings, the partial windings are connected in parallel with each other.

Rotating electric machine

A stator for an electric rotating machine includes an annular stator core, an outer cylinder fitted on a radially outer surface of the stator core, and a stator coil mounted on the stator core. The stator core is comprised of a plurality of stator core segments that are arranged in a circumferential direction of the stator core so as to adjoin one another in the circumferential direction. The stator coil is fixed to the stator core by a thermosetting resin that is set by induction-heating the stator core. Each of the stator core segments is formed by laminating a plurality of steel sheets in an axial direction of the stator core and fixing at least some of the steel sheets by staking. The number of staking portions formed in one of the steel sheets is different from the number of staking portions formed in another one of the steel sheets.

Stator for electric rotating machine

A stator includes a stator core and a stator coil comprised of a plurality of electric wires. Each of the electric wires has, at least, first, second, and third in-slot portions and first and second turn portions. The first to third in-slot portions are respectively received in three different slots of the stator core. The first turn portion is located on one axial side of the stator core outside of the slots to connect the first and second in-slot portions. The second turn portion is located on the other axial side of the stator core outside of the slots to connect the second and third in-slot portions. For each of the electric wires, the radial distances of the first to third in-slot portions from the axis of the stator core successively decrease. All of the electric wires are offset from one another in the circumferential direction of the stator core.

Stator for electric rotating machine and method of manufacturing same

Stator

A stator for an electric rotating machine includes a hollow cylindrical stator core having a plurality of slots and a stator coil formed by joining a plurality of electric wires mounted on the stator core. For each joined pair of the electric wires, one of the electric wires has an end portion led out from the radially inner periphery of one of the slots of the stator core while the other electric wire has an end portion led out from the radially outer periphery of another one of the slots of the stator core; the end portions are welded together to form a weld therebetween. Part of the welds formed between the end portions of the joined pairs of the electric wires are located on the radially inner periphery of the stator coil while the remaining welds are located on the radially outer periphery of the stator coil.

A stator includes a stator core and a multi-phase stator coil comprised of a plurality of electric wires. Each of the electric wires has first, second, . . . , nth in-slot portions and first, second, . . . , (n&#x2212;1)th turn portions, where n is an integer not less than 4. The first in-slot portions of the electric wires are located most radially outward and the nth in-slot portions are located most radially inward in the slots of the stator core. Each of the electric wires also has a first end portion positioned on the first in-slot portion side and a second end portion positioned on the nth in-slot portion side. Each of phase windings of the stator coil is formed of at least two of the electric wires. The first end portion of one of the two electric wires is connected to the second end portion of the other electric wire.

A stator for an electric rotating machine includes a hollow cylindrical stator core and a stator coil made up of a plurality of wave-shaped electric wires. Each of the electric wires has a plurality of in-slot portions, each of which is received in one of slots of the stator core, and a plurality of turn portions each of which is located outside of the slots of the stator core to connect one adjacent pair of the in-slot portions of the electric wire. The stator coil includes a plurality of radial position shift portions each of which is provided, in one of the electric wires, in one of the turn portions of the electric wire between an apex part of the turn portion and one of the in-slot portions of the electric wire adjoining the turn portion and is radially bent to shift the radial position of the electric wire.

A stator includes a hollow cylindrical stator core and a stator coil made up of wave-shaped electric wires. Each of the electric wires has in-slot portions, which are received in slots of the stator core, and turn portions that are located outside of the slots to connect the in-slot portions. The stator coil includes first crank-shaped portions and second crank-shaped portions. Each of the first and second crank-shaped portions is provided, in one of the electric wires, at the center of an apex part of one of the turn portions and is radially bent to shift the radial position of the electric wire. The amount of radial position shift made by each of the second crank-shaped portions is less than that made by each of the first crank-shaped portions. The second crank-shaped portions are located at a plurality of places in the circumferential direction of the stator core.

A rotary electric machine for vehicles is provided, which includes a rotor, a stator disposed opposed to the rotor, a frame made of aluminum and supporting the rotor and the stator, and a rectifier secured to an outer end face of the frame and having low-loss elements as rectifying elements. A heat insulator is disposed between the rectifier and the frame. With this configuration, deterioration can be prevented in the overall cooling properties, while at the same time the cooling properties of the rectifier can be enhanced.

Rotary electric machine for vehicles

A rotary electric machine for a vehicle includes a rotor, a stator and a rectifying device for current AC/DC conversion. The machine operates as a motor and a generator. The machine includes a multi-phase windings, switching elements forming a rectifying device, and a controller for controlling a current path of the multi-phase windings by switching the switching elements on and off to perform two modes of operation. The switching elements are switched such that one end of each windings is connected to either a high electrical potential end or a low electrical potential end of the rectifying device and the other ends of the windings connected together to be the same electrical potential are connected to either the high electrical potential end or the low electrical potential end in the rectifying device.

On-vehicle rotary electric machine operating on two modes of rectification

An alternator for a vehicle has a rotor with a field wiring, a stator with a three-phase stator wiring, a regulator, and a rectifier. The regulator and rectifier are disposed away from each other with the rotor between. An alternating current is generated in the stator wiring in response to a rotation of the rotor and a field current received in the field wiring. The rectifier converts the alternating current into a direct current and outputs the direct current as an electrical energy generated in the alternator. The regulator regulates a value of the filed current to control the electrical energy. The rectifier acts as a heat generating member, but heat generated in the rectifier is hardly transmitted to the regulator disposed away from the rectifier.

Alternator for vehicle

A vehicle alternator for generating electric power is driven by an engine mounted on a vehicle driven through a driving belt. The alternator has a pulley part joined to and directly receiving a driving force from the engine through the driving belt, a field magnet part located in separation from the pulley part, a rotation speed changing part placed between the pulley part and the field magnet part. The rotation speed changing part converts the number of revolutions between the pulley part and the field magnet part. The rotation speed changing part decreases a speed changing ratio 'S' according to increasing of the number of revolutions of the engine, where the speed changing ratio 'S' is obtained by dividing the number of revolutions of the field magnet part by the number of revolutions of the pulley part.

Vehicle alternator

A rolling bearing is adapted for an auxiliary device driven by an internal combustion engine via a belt. The rolling bearing comprises an inner race, an outer race, and a plurality of rolling elements disposed between the inner race and the outer race for rolling capabilities. A substantially half of a tolerance value of a clearance in a radial direction of the rolling bearing falls in a negative value, under a condition where the rolling bearing is mounted in the auxiliary device.

Rolling bearing incorporated in auxiliary device for internal combustion engine

A method of designing a roller bearing is disclosed upon clarifying mechanisms of damage patterns in respect of two kinds of brinelling, involved in the bearing, wherein white-banded flaking (brittle flaking) is a plastic instability phenomenon appearing under high-speed deformation accompanied by adiabatic shear deformation status with the resultant occurrence of adiabatic shear band (also called white band) inside material of the bearing. This enables all of the damage patterns to be determined upon making comparison between shear strain and shear strain rate, occurring inside the bearing, and discriminated values.

Apparatus and method for determining patterns of damage being caused in rolling contact element

An automotive alternator includes a rotary shaft, a pulley, a stator, a rotor, and a magnetic fluctuation suppressor. The pulley is provided on the rotary shaft to transmit rotating power from an engine to the rotary shaft. The stator includes a stator winding. The rotor is mounted on the rotary shaft and configured to provide a first rotating magnetic field to the stator. The magnetic fluctuation suppressor includes a magnetic body and a magnetic source. The magnetic body is mounted on the rotary shaft such that the magnetic body is rotatable along with the rotary shaft at a rotational speed different from that of the rotary shaft. The magnetic source is fixed to the rotary shaft so as to create a second rotating magnetic field which induces a magnetic attraction between the magnetic body and the magnetic source, by which fluctuations in rotational movement of the rotary shaft are suppressed.

Growing community of inventors

Okazaki, Japan

Atsushi Umeda