Denso Corporation

Asmo Co., Ltd.

Nagoya Institute of Technology

Jirou Hayashi

Makoto Taniguchi

Asuka Tanaka

Takashi Suzuki

Hiroki Tomizawa

Hiroshi Ishikawa

Hiroshi Imai

Akihiro Kimura

Masahiro Goto

Makoto Iwasaki

Nobuyuki Matsui

Yuuji Yamashita

Yoshifumi Morita

Yutaka Ohashi

Noriyuki Ido

Yoshimasa Kinpara

Hiroyuki Ukai

Takahiro Yamamoto

Kazuhiro Ichikawa

Kentaro Torii

Hiroshi Katai

A stator is disposed inside a motor case having a cylindrical shape. A winding wire is wound around the stator. A rotor is rotatably disposed inside the stator. A shaft is disposed in a rotational center of the rotor. A first plate covers one side of the motor case. The first plate rotatably supports one end portion of the shaft. A second plate has an insert hole extending in a thickness direction of the second plate. The second plate covers an other side of the motor case and rotatably supports an other end portion of the shaft. A wire extending portion has one end electrically connected to the winding wire. The wire extending portion extends from the winding wire and is inserted into the insert hole. A controller is disposed on a side of the second plate opposite to the motor case. The controller includes a substrate and is electrically connected to an other end of the wire extending portion at a side of the substrate opposite to the second plate to control energization to the winding wire.

Electrical power steering device

A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in one end of the frame. A heat transfer plate is interposed between heat-generating elements formed on the control substrate and the heat sink to absorb variations in a distance therebetween, the heat transfer plate allow heat to be transmitted from the heat-generating elements to the heat sink. The heat transfer plate includes a frame body mounted to the heat sink and a plurality of contact strips that flexibly protrude from the frame body and that abut the heat-generating elements.

Rotating electrical machine

A frame of an electric motor opens in one end. A heat sink, to which a control substrate is connected, closes an opening of the frame. The frame includes a cylinder portion to which a stator is fixed, and a bottom portion that extends inward in the radial direction from the cylinder portion. A rotor is rotatably mounted in the frame to face the stator in the radial direction. A circumferential groove is formed in the bottom portion to face a stator coil in an axis of rotation direction. The circumferential groove is filled with a heat transfer gel. A coil end portion of the stator coil is inserted into the heat transfer gel.

A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in an opening of the frame. A motor cover is attached to a front end of the frame to cover the heat sink. An adhesive groove, which has a fixed depth and is filled with an adhesive, is formed on the front end. A joining portion is formed on the rear end of the motor cover, and is inserted into the adhesive groove is an axis of rotation direction to join the motor cover with the frame in a liquid-tight manner.

A frame of an electric motor opens in one end. A heat sink, to which a control substrate is connected, closes an opening of the frame. A stator is positioned on an inner circumferential surface of the frame to be movable in an axis of rotation direction. A fastening bolt penetrates through the heat sink and a motor cover to fasten to the frame, thereby holding the stator between a pressing portion formed on the heat sink and a stepped portion formed on the inner circumferential surface to fix the stator to the frame. A disc spring is interposed between a front bearing that retains a rotor shaft and a spring retainer formed in the heat sink, and the rotor shaft is biased in the axis of rotation direction by a biasing force from the disc spring.

An electric rotating machine has a first end frame and a second end frame for firmly supporting a stator between them in an axial direction of the electric rotating machine. An electronic control portion is mounted to a rear side of the first end frame. Multiple through-holes are formed at a radial-outer periphery of the second end frame. Each of multiple through-bolts is inserted into the respective through-holes from a side of the second end frame and screwed into the first end frame, to thereby firmly connect the first and the second end frames to each other.

Electric rotating machine

Rotational electric machine

Each permanent magnet provided in a rotor includes a projection that projects toward a corresponding predetermined portion of the rotor core. An inner peripheral surface of each permanent magnet, which is radially opposed to the corresponding predetermined portion of the rotor core, includes a primary contacting portion and two primary non-contacting portions. The primary contacting portion contacts the corresponding predetermined portion of the rotor core at a circumferential location, which corresponds to the projection. The primary non-contacting portions do not contact the rotor core and are located on two circumferentially opposite sides, respectively, of the primary contacting portion.

Rotor and dynamo-electric machine having the same

A control device for controlling a multi-phase AC motor generating a steering assist torque in an electric power steering device of a vehicle, includes: first and second inverters in first and second systems that output first and second alternating current voltages to first and second multi-phase winding wire sets, respectively; and a control unit that controls a phase difference between the first and second alternating current voltages. The first and second multi-phase winding wire sets provide a stator of the motor, and generate a rotating magnetic field in a rotor. The control unit sets a control range including a reference phase difference, which reduces a specified-order harmonic component, and changes the phase difference within the control range according to a characteristic required of the motor, or so as to cause a fluctuation in the energization of the motor.

Control device for multi-phase AC motor

An electronic apparatus includes a rotating electric machine that has a plurality of multi-phase winding sets, each of which has a plurality of phase windings; a plurality of inverter circuits that are connected to the plurality of multi-phase winding sets respectively; and a control circuit that controls the plurality of inverter circuits such that a multi-phase alternating current is supplied to each of the plurality of multi-phase winding sets from each of the plurality of inverter circuits. The control circuit determines that a short circuit occurs when i) a plurality of phase current added values obtained by adding each phase current flowing through each of the plurality of phase windings calculated at each of the plurality of multi-phase winding sets; and ii) an absolute value of a total phase current added value obtained by adding all of the plurality of phase current added values is smaller than a predetermined value.

Electronic apparatus

A method for manufacturing a stator configured to ensure insulation properties between a conductor and an armature core while preventing a manufacturing cost from increasing and preventing a space factor from lowering. In an edge-removing step, a plurality of independent edge-removing punches, which correspond to one slot S or two or more slots S, press and chamfer a corner portion of an axial opening edge of the slot in an axial end core sheet of the armature core.

Method for manufacturing an armature core

A motor drive apparatus includes a rear end frame between a motor case and a control unit case. A shaft of a motor unit is supported rotatably by a bearing fixed to the rear end frame. A first socket-spigot fitting surface formed on the rear end frame is fitted with a second socket-spigot fitting surface formed on a heat sink. A rotation angle sensor mounted on a control unit substrate attached to the heat sink is provided on the rotation axis of the shaft. The rotation angle sensor can thus accurately detect the magnetic field of a magnet provided at the end of the shaft.

Motor drive apparatus

A rear frame has a fastening portion, which radially extends from an outer peripheral surface of the rear frame and receives a fastening force of a through bolt. A circuit board, which includes a control circuit, is installed to an axially outer surface of a main body of the rear frame. A reinforcing portion is provided in the fastening portion to limit deformation of the main body of the rear frame, which is induced by the fastening force of the through bolt.

Electric motor having first frame and second frame fastened together with through bolt

A stator core is sandwiched between a first frame and a second frame. A fastening member fastens the first frame and the second frame. The first frame includes a ring flange that is in contact with an attachment surface of the motor attachment portion. The flange includes a fixing portion fixed to the attachment surface and a fastening portion, which receives fastening force by the fastening member. The first frame includes a deform suppression portion for suppressing deformation of the fixing member when the fastening member is fastened.

Motor

A cover is configured into a tubular form and is fitted to a radially outer surface of each of projections of a rotor core and a radially outer surface of each of permanent magnets. A circumferential center portion of the radially outer surface of each projection contacts a radially inner surface of the cover. Circumferential end portions of the radially outer surface of each projection are radially inwardly spaced from the radially inner surface of the cover.

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Ama, Japan

Jirou Hayashi