Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electronics Corporation

Kazuhisa Takashima

Satoru Akutsu

Yoshihito Asao

Masatsugu Nakano

Akihiro Yamamura

Toshihiro Matsunaga

Toshinori Tanaka

Kyouhei Yamamoto

Akihiro Daikoku

Isao Sonoda

Yusuke Morita

Masayuki Miyaoka

Atsushi Sakaue

Yuji Nakahara

Akihiro Shibata

Akihiko Morikawa

Takanori Ichikawa

Hideya Nishikawa

Kentaro Urimoto

Takahisa Kawaguchi

Ryuichi Ikeda

Tetsuya Oba

Kengo Fujimoto

Mitsuyuki Tsumura

Katsuhiko Sakamoto

Misa Nakayama

Kazuki Sawada

Hiromu Nonoguchi

Harumi Inoue

Hiroki Maeda

Yusuke Funabiki

Keiji Hino

Atsushi Ichigozaki

Hidechika Fujii

The in-vehicle camera comprises a lens barrel; a circuit board on which an image processing circuit is mounted, the image processing circuit performing image processing to recognize a subject from video signals; and a housing which includes an intake vent and an exhaust vent and accommodates therein the circuit board such that the image processing circuit and the lens barrel are away from each other in the left-right direction. The in-vehicle camera is configured such that a ventilation passage connecting the intake vent and an exhaust vent is formed between an inner face on a side of the installation face of the housing and the circuit board in a path that is away from the lens barrel and passes through a region in which the image processing circuit is disposed.

In-vehicle camera

Provided are a motor control device including: a motor case including a motor; a housing, which is provided to have a power supply connector mounted thereon and cover an upper portion of the motor case; and a control unit, which is arranged on a side opposite to an output side on an output shaft of the motor in a space formed by the motor case and the housing, and an electric power steering control device. The control unit includes a filter portion, which is arranged in an upper portion of the control unit and is connected to the power supply connector, a control board, which is arranged below the filter portion and has mounted thereon circuit components configured to supply an electric current to the motor, and a shield plate, which is arranged between the filter portion and the control board and is grounded to the motor case.

Motor control device including a shield plate, and electric power steering control device

The present invention is concerning the control device equipped with a motorand a control unitwhich is coaxial to the motor. An upper frameis arranged at a boundary between the motorand the control unit. A semiconductor module, an intermediate member, and a control boardare provided in the control unit. For assembly of the semiconductor moduleand the intermediate member, a latch portionis provided on one of the semiconductor moduleand the intermediate member, and an engaged portion into which the latch portionlocks is provided on the other of the semiconductor moduleand the intermediate member, whereby positioning of the semiconductor moduleand the intermediate memberis achieved.

Control device with semiconductor module having bent latch, control, power supply and motor control terminals

The hole diameter of a shaft through hole formed in the rotor core is changed in the axial direction, thereby forming a concave portion whose hole diameter is large and a convex portion whose hole diameter is small in the inner circumferential surface of the shaft through hole; the convex portion is arranged at opening portions on both ends of the shaft through hole; a shaft having ridge-shaped convex portions on a press-fitting portion is press-fitted into the shaft through hole to assemble; the number of points of the concave portion is equal to or more than two; and respective diameter dimensions of the concave portion, the convex portion, and the shaft are set to be the diameter of a main body of the shaft&#x3c;the diameter of the convex portion&#x3c;the diameter of ridge-shaped convex portions of the shaft&#x3c;the diameter of the concave portion.

Rotor for rotary electric machine having ridge-shaped convex portions and concave portions to secure a press-fitted shaft

The connection terminal and the power supply terminal are held by a common holding member made of a resin. The power supply terminal includes a press-fitting portion press-fitted into a press-fitted portion of the holding member. The press-fitted portion of the holding member has a shape that is long in a plate width direction of the power supply terminal and short in a plate thickness direction of the power supply terminal. Assuming that a dimension of each of both end portions of the press-fitted portion in the plate width direction of the power supply terminal is defined as L, a dimension of a center portion of the press-fitted portion is defined as L, and a plate thickness of the power supply terminal is defined as T, L&#x3c;T&#x3c;Lis satisfied under a non-press-fitted state.

Power feed section structure of electric power assisting motor apparatus

In a rotary electric machine including a stator and a rotor, the stator includes: a connected core () composed of a plurality of cores in which a first core () and a second core () are paired to connect in a belt shape to be rounded into a substantially cylindrical shape by being folded at a core connecting portion () so as to surround the rotor; a plurality of coils in which a first coil () and a second coil () are paired; and a crossover wire () which connects the winding end () of the first coil () to the winding start () of the second coil (). The crossover wire () are arranged on the inner diameter side than the core connecting portion ().

Rotary electric machine and method of manufacturing the same

A permanent magnet motor () is configured such that mN&#x2260;K is satisfied to an integer m, where the pole number of a rotor () is K and the number of divided iron cores (-) of a stator () is N, and N values of r(&#x3b8;), r(&#x3b8;+360&#xb0;/N), . . . , r(&#x3b8;+(i&#x2212;1)&#xd7;360&#xb0;/N), . . . , r(&#x3b8;+(N&#x2212;1)&#xd7;360&#xb0;/N) are equal so that the absolute value of the difference between any two of the N values becomes up to a predetermined value, where r(&#x3b8;) is an inner radius defined as, on a plane perpendicular to a rotary shaft () of the rotor (), a distance from the rotary shaft () center to a surface of the stator iron core () facing the rotor () where an angle from a fitting portion () of the partial iron core () is &#x3b8; on the perpendicular plane, &#x3b8; taking 0 to 360&#xb0;/N.

Permanent magnet motor

An electrical machine includes a back-yoke engagement portion including a convex portion for a back yoke portion formed on an outer-diameter surface of a pair of back yoke-side coil retaining pieces and a shoe engagement portion including a convex portion for a shoe portion. By the convex portion for the back yoke portion and the convex portion for the shoe portion, the back yoke-side coil retaining pieces and shoe-side coil retaining pieces are biased toward a stator core.

Rotating electrical machine with biased bobbin

An electric power steering electric motor apparatus includes: an electric motor including: a motor housing; a stator; a rotor; and a power supplying portion that supplies electric power to the stator; and a controlling unit including: a driving circuit that supplies electric power to the electric motor; a connecting portion; a controlling circuit; and a case that covers the driving circuit and the controlling circuit, the electric motor and the controlling unit being mounted coaxially onto a gear housing that reduces rotational speed of the electric motor so as to position the controlling unit on a side near the gear housing, and the connecting portion being connected to the power supplying portion inside the case through an opening portion formed on the case, and being positioned and held by an insulating member so as to be insulated from the case and the motor housing.

Electric power steering electric motor apparatus and electric power steering apparatus

A compact, light permanent magnet motor with low torque pulsations is obtained by reducing a cogging torque resulting from variations at the end of a rotor, such as an error in attachment position and a variation in magnet characteristic of the permanent magnets. A permanent magnet rotating electrical machine includes a rotor and a stator, a stator core provided with slots in which to store an armature winding wire wound around the teeth, and supplemental grooves provided to the teeth in portions opposing the rotor in an axial direction of the stator core. The supplemental grooves are provided to the stator in a part in the axial direction of the stator core, and that let P be the number of the magnetic poles (the number of poles) and S be the number of the slots (the number of slots), then a relation, 0.75&#x3c;S/P&#x3c;1.5, is established.

Permanent magnet rotating electrical machine and electric power steering apparatus having a stator core with supplemental grooves

A rotor of a rotary electric machine according to the present invention includes: a rotor core arranged on the outer circumferential side of a rotor shaft; and a plurality of magnetic poles fixed to the rotor core and circumferentially arranged on the rotor core, the rotor including a non-magnetic ring attached by insertion to the outer circumference of the plurality of the magnetic poles and having a substantially polygonal shape in outer circumferential shape. The non-magnetic ring is configured such that the inner circumferential length L of the non-magnetic ring before assembly with respect to the length of an envelope Lof tangent lines each between the outer circumferential surface of the magnetic pole and the outer circumferential surface of the adjacent magnetic pole is set to L&#x2266;L. An object is to obtain the rotor of the rotary electric machine capable of achieving reduction in size and cost.

Rotor of rotary electric machine having non-magnetic ring

Not less than two regions different in magnetic circuit design are provided in a rotational axis direction of the rotor (), the regions being different by changing a cross-sectional shape in the rotational axis direction in a cross-section perpendicular to a rotational shaft () of the rotor () having the permanent magnets () and the rotor core (); the supplemental grooves () are provided in axial partial regions of each of the teeth () of the stator core (); and the region in which the supplemental groove () is provided is each partial region for each region facing a region same in magnetic circuit design of the rotor (). This enables to reduce cogging torque generated by variations on the rotor side.

Permanent magnet type rotary electric machine and electric power steering apparatus using the same

A motor for an electric power steering device, includes: a housing side bearing which is placed on the output side of a shaft of a rotor placed in a frame, and is supported by a housing connected to the frame; and a frame side bearing which is placed on the opposite output side of the shaft of the rotor, and is composed of an outer ring and an inner ring supported by the frame. The motor is controlled by an electronic control unit which is coaxially placed with the rotor, the motor including: a bearing box which supports the frame side bearing, and is formed with a closed end section between the closed end section and the side of the frame side bearing; an axial elastic body which is placed on the closed end section of the bearing box, and applies a preload in an axial direction to the outer ring of the frame side bearing; and a radial elastic body which is placed on the outer circumferential side of the outer ring of the frame side bearing, and applies a preload in a direction perpendicular to the axial direction.

Motor for electric power steering device

Provided is a motor for an electric power steering apparatus, in which vibrations and noises are suppressed. The motor for an electric power steering apparatus includes: a motor section () for outputting an assist torque to a handle of a vehicle; and a controller () for controlling driving of the motor section (). The motor section () includes: a rotor (A) having P poles; and a stator (A) provided so as to surround the rotor (A), the stator including: a stator core () provided with n slots formed thereon and housed in a frame (); and three-phase stator windings () wound around the slots (). The controller () is provided between a boss () and the motor section () so as to surround the output shaft ().

Motor for an electric power steering apparatus

A permanent magnet type rotating electric machine includes: a rotor including a rotor core having a polygonal shape and a plurality of permanent magnets; and a stator including a stator core and armature windings, in which, when the number of poles is M, the number of slots is N, M permanent magnets are sequentially numbered from first to M-th in a circumferential direction, and a positional shift amount in the circumferential direction from a corresponding one of equiangularly arranged reference positions, each being at the same radial distance from a center of a rotating shaft, for an i-th (i=1, 2, . . . , M) permanent magnet is h, M unit vectors in total, each being in an angular direction of 2&#x3c0;N(i&#x2212;1)/M (rad), are defined, and a sum of M vectors obtained by multiplying the unit vectors respectively by the positional shift amount his smaller than a maximum value of an absolute value of the positional shift amount h.

Growing community of inventors

Tokyo, Japan

Kazuhisa Takashima