Hitachi, Ltd.

Hitachi Car Engineering Co., Ltd.

Hitachi Automotive Engineering Co., Ltd.

Susumu Tajima

Keiichi Mashino

Tatsuyuki Yamamoto

Shinji Yamazaki

Hisaya Shimizu

Yoshinori Fukasaku

Yuuji Maeda

Toshiyuki Innami

Susumu Sasaki

Masami Takano

Keisuke Nishidate

Hideaki Mori

Susumu Terumoto

Keizou Kawamura

Wasei Horioka

Kenichiro Matsubara

Hiroshi Kanazawa

Masashi Kitamura

Takayuki Koyama

Yuichiro Baba

Yoshiaki Honda

Masahiko Honma

Koki Ueta

Sakae Ishida

Makoto Hirama

Kenya Takarai

Naoki Kamada

Hideo Mori

Keisuke Mishidate

Eiji Naito

Toru Inaba

Suehiro Endo

It is made easy for a stator winding to be wound around a stator core and degradation in efficiency is prevented as much as possible. A stator () includes a plurality of phases, i.e., of circumferentially divided stator magnetic poles (). The stator magnetic poles () are each composed of an arcuate stator core () having a plurality of axially extending claw poles () and a circumferentially elliptically wound stator winding (). The stator magnetic poles () are magnetically divided; therefore, magnetic flux leakage is reduced to improve efficiency. Air flowing between the stator magnetic poles () can improve a cooling effect.

Rotating electrical machine and alternating-current generator

To provide a vehicle driving apparatus capable of providing a sufficient driving force. A driving high-power generator is driven by an engine. A DC motor is driven directly by energy from the generator. A driving generator output voltage control circuit controls output voltage of the generator in accordance with the demanded driving force from the vehicle to control the motor.

Electric generating system for automobiles and its control method

An electric generating system for automobiles has a primary generator which is driven by an internal combustion engine of an automobile and supplies power to an electric load of the automobile and an electric motor for driving wheels of the automobile which are not driven by the internal combustion engine. A secondary generator is driven by the internal combustion engine and drives the motor. A control unit controls the secondary generator and the electric motor. The control circuit controls the output of the generator according to a driving force requested by the automobile, and the driving force of the electric motor is controlled by the output of the secondary generator.

An alternator for a vehicle includes a stator having a stator winding, a rotor opposing to the stator through a gap, a rectifier for converting AC power generated by the stator winding into DC power, a frame which holds the stator and has a cooling medium path at least one end thereof being opened, and an end plate for hermetically closing the opened end of the cooling medium path, wherein a cathode side rectifying element constituting the rectifier is fixed to a portion of the end plate not opposing to the cooling medium path, and a cooling member, at which an anode side rectifying element constituting the rectifier is fixed, is fixed to the end plate in an insulated state so that the anode side rectifying element is disposed at a position lower in temperature than a fixed position where the cathode side rectifying element is disposed.

Alternator for vehicle

The present invention provides a vehicle driving apparatus capable of being mounted easily even in a narrow space such as under-floor of the vehicle. The vehicle driving apparatus comprises a first and a second generators driven by an engine for driving front wheels, and a motor driven by receiving a power supply from the second generator to drive rear wheels, the first and second generators being installed in the vicinity of an engine within an engine room, the motor being arranged in the vicinity of a differential gear with which a reduction mechanism is integrated and is positioned substantially in a central part of the rear wheels.

The rotor of a vehicle alternator can firmly fasten the permanent magnets between claw-shaped magnetic poles. The rotor includes a Lundell type iron core having claw-shaped magnetic poles which are alternately arranged and opposed each other and include a centered cylindrical field winding, and a permanent magnet disposed between the claw-shaped magnetic poles for increasing the magnetic field. The permanent magnet is held by radial elastic force.

Vehicle alternator and its rotor

To reduce noise, there is provided an alternator for motor vehicles having a rotor and a stator which is mounted between a pair of brackets. In the alternator a stator core forming the stator is made up of laminations of thin sheets. And at least a part of the thin sheets making up the stator core are split into four divisions or more in the circumferential direction; the thin sheets of each layer being laid with splits thereof arranged alternately in the circumferential direction.

Vehicle use ac generator

An automotive alternator comprises: a stator provided with a stator coil; a rotor supported for rotation in the stator to apply an alternative magnetic field to the stator; a regulator for regulating output; a rectifier for rectifying generated current; a plurality of housings holding the stator and the rotor; and a coolant path through which a coolant flows through at least one of the plurality of housings to transfer heat generated in the stator coil outside the automotive alternator. Fastening devices formed of a material having good heat conductance fasten the regulator and a heatsink for the regulator together to the housing at a position apart from the housing to transfer heat generated by the regulator to the housing. Thus, the automotive alternator can maintain a stable cooling ability in a hot atmosphere for a long time.

An alternator for use in an automobile includes brackets for supporting a rotation shaft at both sides of a rotor, being thermally connected to a stator for supporting the stator, while one side of the rotor is closed by a bracket. A cooling water passage is provided in the bracket, a cooling fan is provided on the closed side of the rotor, and a cooling fin provided opposing to the cooling fan and in vicinity of the cooling water passage, thereby enabling cool down of the stator and the rotor, effectively, with low noises, and thereby obtaining a high power output.

Alternator for use in a vehicle

An alternator for vehicles, provided with a stator, a rotor, a rectifier and a voltage regulator, and comprising turbulent flow generating members provided on heat transfer surfaces, through which heat generated from a field coil is transferred to a side of a bracket from a rotor, to generate convection of an air and turbulence of flow on downstream regions of recesses and projections, whereby a heat transfer performance from the rotor to the bracket is enhanced with a rotational frequency of the rotor.

Alternator for vehicles

A contaminant proof structure for a starter for an engine, with the starter including a sliding portion between a sliding member and a support member supporting the sliding member disposed in a housing so that the sliding member can project into the outside of the housing through an opening formed in a wall of the housing. An atmospheric gas reservoir disposed in the housing between the support member and the wall of the housing around the opening, and a communication passage bypasses the sliding portion and communicates the atmospheric gas reservoir with an external atmospheric gas through a space at an opposite side of the support member to the atmospheric gas reservoir side. The sliding member is dimensioned such that a gap between the opening and the sliding member inserted in the opening is small.

Growing community of inventors

Hitachinaka, Japan

Susumu Tajima