Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Renesas Electronics Corporation

Hitachi, Ltd.

Takuro Kanazawa

Haruaki Motoda

Akira Mishima

Hideyuki Hara

Kentaro Ochi

Kazuhiko Nakano

Tetsuo Iijima

Norio Kido

Katsuo Ishizaka

Narutoshi Yamada

Ryoichi Kobayashi

Kimihisa Furukawa

Keiji Hamada

Akira Ishii

Nobuyasu Kanekawa

Kinya Nakatsu

Tomishige Yatsugi

Tomonobu Koseki

Shigehisa Aoyagi

Toshiyuki Kobayashi

Tomohiro Fukuda

Manabu Hashimoto

Toshihiko Sakai

Tetsuro Tateyama

An electric drive device includes: an electronic control section including a first electronic control section and a second electronic control section which constitute a redundant system, the first electronic control section and the second electronic control section being provided with a first control section side connecter and a second control section side connecter which have an identical configuration, and the first non-control section side connecter being engaged with the first control section side connecter, and the second non-control section side connecter being engaged with the second control section side connecter to correspond to the lengths of the first harness and the second harness.

Electrical drive device and electrical power steering device

On the opposite side to an output of a rotation shaft of an electric motor, a ventilation hole communicating between an electronic control unit (ECU) housing space and an electric motor housing space is formed to an end surface wall of a motor housing separating the respective housing spaces. The ventilation hole has a waterproof ventilation part that suppresses water passing but permits the passage of air and water vapor. This structure eliminated the influence of flying rocks and muddy water from the external environment, and suppresses for a long period of time the internal pressure fluctuation of the ECU housing space and the penetration of water into the housing space. Therefore, the internal pressure fluctuation of the housing space for the ECU and the penetration of water into the housing space for the ECU can be suppressed over a long period of time.

Electric drive device and electric power steering device for suppressing pressure fluctuations and water penetration

A first circuit boardand a second circuit board, each of which have mounted thereon circuit components for controlling and driving an electric motor, are stacked with a space left therebetween such that one board surface of the first circuit board and one board surface of the second circuit board are opposed to and face each other in the direction of a rotation shaftof the electric motor. In a state that the first circuit boardand the second circuit boardare attached to the motor housing, a receptacle connectormounted on the first circuit board and a plug connectormounted on the second circuit board form a 'board-to-board connector' by which the circuit components of the first and second circuit boards are electrically connected.

Electric powered drive device, and method for assembling electric powered drive device

An element-side connection terminal () extending from a power conversion circuit unit () includes a first connection terminal portion (A) that extends in a direction intersecting a direction of extension of a counterpart-side connection terminal (); and a second connection terminal portion (B) that is bent at a point before the first connection terminal portion (A) reaches the counterpart-side connection terminal () in a direction to intersect the direction of extension of the counterpart-side connection terminal () such that the second connection terminal portion (B) is provided with elasticity and is in an elastic contact with the counterpart-side connection terminal () at an angle. A tip end side (T) of the counterpart-side connection terminal () and a tip end side (T) of the second connection terminal portion (B) are electrically joined.

Electronic control device and electric drive device

A circuit substrate () is provided with first and second rigid parts () having six metal foil layers, and a thin flexible part () having two metal foil layers connecting the two rigid parts. A ground wiring () which is shaped like a wide strip is formed on the surface metal foil layer, and a plurality of inter-rigid-part wirings () are formed on the inner metal foil layer in parallel lines. Outer edges () of the ground wiring () are positioned closer to side edges () of the flexible part () than to the inter-rigid-part wirings (). The ground wiring () protects the inter-rigid-part wirings () from cracks.

Electronic device

An electric drive device includes: a motor housing for housing an electric motor, wherein the motor housing includes an end face part opposite to an output part of a rotating shaft of the electric motor; and an electronic control part arranged at the end face part. The electronic control part includes a control circuit part, a power supply circuit part, and a power conversion circuit part, which are covered by a metal cover, wherein the metal cover is fixed water-tightly to the end face part. The end face part includes a power conversion heat dissipation region and a power supply heat dissipation region. Each of the control circuit part and the power supply circuit part is contained on a circuit board, wherein the circuit board is placed along a plane perpendicular to the rotating shaft, and layered with each other in an axial direction of the rotating shaft.

Electric drive device and electric power steering device

In an electric drive device, a motor housing includes an end face part opposite to an output part of a rotating shaft of a motor. An electronic control part is arranged at the end face part of the motor housing, and includes a control circuit part, a power supply circuit part, and a power conversion circuit part. The power conversion circuit part is mounted to a power conversion part heat dissipation region of the end face part of the motor housing. The power supply circuit part is mounted to a power supply part heat dissipation region of the end face part of the motor housing. A power conversion circuit part holder is attached to a portion of the end face part around the rotating shaft, and includes a resilient function member structured to press and hold the power conversion circuit part on the power conversion part heat dissipation region.

Power conversion circuit unit defined by rotation shaft-side line facing toward rotation shaft of electric motor, control output terminal-side line facing toward coil input terminals of electric motor and side lines connecting both end portions of rotation shaft-side line and control output terminal-side line is packaged with synthetic resin. Three-phase control output terminals connected to the coil input terminals are formed at control output terminal-side line. Power switching elements forming upper and lower arms for each phase are arranged in a zigzag formation along control output terminal-side line with power switching elements being offset from a substantially middle between rotation shaft-side line and control output terminal-side line toward control output terminal-side line. With this, size of power conversion circuit unit can be reduced, and heat of power conversion circuit unit can be efficiently released to the outside.

Electric drive device and electric power steering apparatus

Provided is an electric drive device in which heat-dissipating sections (A) (B) that transfer at least heat generated by a power supply circuit unit () and power conversion circuit units () to a motor housing () are formed on an end surface section () of the motor housing () on the opposite side from an output section of a rotating shaft () of an electric motor. In addition, a watertight lid member () that covers a through hole () through which the rotating shaft passes and the end of the rotating shaft () from the exterior is attached to the end surface section () around the through hole (), and a waterproof breathable membrane () that prevents the passage of moisture while allowing the passage of air and water vapor is provided to part of the watertight lid member.

An object of the present invention is to reduce an inductance of a power circuit, reduce a switching loss and a noise level and improve a voltage-use ratio of a battery power in a redundant-type electronic control device. An electronic control device that controls a motor has power modulesto drive the motor. Power terminalsandof the power moduleare arranged in positions that are close to and face power terminalsandof the power module, which are opposite to the power terminalsandof the power modulein polarity. Power terminalsanddrawn from a longitudinal end portionof the power moduleare arranged in positions that are close to and face power terminalsanddrawn from a longitudinal end portionof the power modulewhich are opposite to the power terminalsandof the power modulein polarity.

Electronic control device and electric power steering device

Magnetic flux generated when a current flows through a main circuit wiring serves as disturbance of a magnetic sensor, and accurate rotor position information is obtained. A motor drive apparatus controls an operation of a power conversion device outputting a current to an AC motor on the basis of a desired torque command value, and includes a main circuit wiring that is electrically connected to a switching element forming the power conversion device, and through which a DC current or an AC current is transmitted thereto, a magnetic sensor that detects a magnetic flux change of a sensor magnet attached to a rotor of the AC motor, and a controller that calculates a current command value which is output from the power conversion device to the motor on the basis of position information of the rotor detected by the magnetic sensor, in which the controller includes a magnetic flux error correction unit that detects or calculates a magnetic flux component generated by a current flowing through the main circuit wiring.

Power conversion device and motor drive apparatus

The purpose of the present invention is not only to reduce ripple current but also to improve operation efficiency by reducing heat generation. When n is defined as an integer of 2 or more, a motor control device of the present invention drives n sets of windings by n sets of inverters. The motor control device is characterized in that when said n sets of inverters output high power, at least one or more of said n sets of inverters are set to have an output duty cycle of 100%.

Motor control device and electric power steering system using said motor drive circuit

An object of the invention is to simultaneously solve a miniaturization and an improvement of productivity of a power conversion device, a temperature rise suppression of a smoothing capacitor, and a reduction of motor noises. The power conversion device of the invention includes a smoothing capacitor, a first power conversion unit and a second power conversion unit which are connected in parallel, and a control unit which generates a PWM pulse on the basis of an output voltage vector and a PWM carrier. The control unit includes a correction unit which corrects a predetermined output voltage vector value to two or more different output voltage vector values such that an average value in one period of the PWM carrier becomes the predetermined output voltage vector value. The correction unit corrects a first output voltage vector value in a first period, and corrects a second output voltage vector value in a second period different from the first period.

Power conversion device and electric power steering device using the same

An object of the present invention is to provide a power module that secures a heat dissipation route and has increased reliability. A power module of the present invention includes a first circuit body having a first semiconductor element and a first conductor portion, a second circuit body having a second semiconductor element and a second conductor portion, a resin sealing material for sealing the first circuit body and the second circuit body, and a warpage suppression portion that is formed along an array direction of the first circuit body and the second circuit body and is formed to have greater rigidity than a sealing portion of the resin sealing material, wherein the warpage suppression portion is formed of the same material as a resin member of the resin sealing material and is formed to be thicker than the sealing portion of the resin sealing material.

Power module and power conversion apparatus having a warpage suppression portion

An inverter () is disposed toward an opening in a motor side metal housing (). A power module () is disposed on a metal cover () that is in contact with the metal housing (). The power module () includes a semiconductor element, a metal terminal connected to the semiconductor element, and resin that seals the semiconductor element and the metal terminal. A metal plate () is disposed on a surface of the power module () that is positioned opposite the metal cover (). Heat generated by the power module () is dissipated from the metal cover () and from the metal plate (). This improves the heat dissipation performance. Thus, the size of the power module can be reduced.

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Hitachinaka, Japan

Takuro Kanazawa