Hitachi, Ltd.

Other

Hitachi Automotive Systems, Ltd.

Hitachi Car Engineering Co., Ltd.

Hitachi, Ltd. & Hitachi Car Engineering Co.

Ryoichi Kobayashi

Noboru Sugiura

Katsuaki Fukatsu

Nobuyasu Kanekawa

Takashi Ito

Tomonobu Koseki

Kazuji Yamada

Noriyoshi Urushiwara

Toshiaki Kaminaga

Atsushi Miyazaki

Tomishige Yatsugi

Hideo Sato

Takuro Kanazawa

Takashi Mukaihira

Shigeyuki Kobori

Atsushi Uehara

Mitsutoshi Nakane

Yasunori Fujino

Keisuke Honda

Toshio Ishii

Satoshi Shimada

Shoji Sasaki

Isao Shimizu

Kanji Kawakami

Seiko Suzuki

Masami Shida

Motohisa Nishihara

Seikou Suzuki

Katsuya Oyama

Yuichi Kashimura

Hiroshi Onuki

Masafumi Suzaki

Toshihiko Sakai

Tomoji Kitagishi

Norio Moriyama

Shigetaka Furukawa

Ryosaku Kanzawa

Fumio Takahagi

Hiroshi Ichige

Yasuo Nagai

Katsuyoshi Izawa

Masayuki Ozawa

Satoshi Hirakawa

Hiroyuki Ohgi

Noboru Kobayashi

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

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 present invention is to realize a feedback control apparatus and an electrically driven power steering apparatus capable of safely continuing control operation even in the event of the occurrence of a soft error. A controllerof the present invention determines a d-axis target voltage Vd and a q-axis target voltage Vq, which are control values for controlling an output value of the electrically driven power steering apparatus on the basis of a d-axis error signal &#x3b4;Id and a q-axis error signal &#x3b4;Iq, which are input values. In this processing, in a period before the occurrence of the soft error, the controllerdetermines the d-axis target voltage Vd and the q-axis target voltage Vq by means of PID control that uses a current input value and a past input value. In a period after the occurrence of the soft error, the d-axis target voltage Vd and the q-axis target voltage Vq are determined by means of P control that uses a current input value but does not use a past input value. In a period after a lapse of the above period, the PID control is resumed.

Feedback control apparatus, electrically driven power steering apparatus

In order to provide a motor driving circuit in which a portion corresponding to a failed phase can be separated while miniaturization and lower costs are achieved, a motor driving circuit for driving a motor includes: a second driver circuit for driving a driver circuit which supplies a drive current corresponding to one phase of a multiphase motor having three or more phases, to the multiphase motor; and an electrical circuit which includes a plurality of electrical components and switches a connecting relation between the electrical components according to an operation mode designated from outside the motor driving circuit, thereby providing a circuit function corresponding to the operation mode.

Motor driving circuit, motor driving system, electric power steering system, electric brake system, and vehicle driving system

A power conversion device is configured to convert power supplied from a power source into a driving current of a motor. A first semiconductor switching element of the power conversion device is disposed between a phase output of the power conversion device and the power source. A second semiconductor switching element of the power conversion device is disposed between the phase output of the power conversion device and a ground. The power conversion device further includes a first semiconductor switching element group.

Power conversion device, electric power steering system, electric vehicle, electronic control throttle, and electric brake

An object is to prevent the motor from carrying out a regeneration braking operation even if any of phase output lines is short-circuited to VB or GND in addition to a short-circuit failure occurring in a MOSFET of an inverter. The semiconductor switching devices of a power conversion apparatus each have a diode that is coupled in parallel to each of the semiconductor switching devices. At least one of the diodes are connected in a direction opposite to the direction in which other diodes are oriented on a current path between the power supply and the ground. Further, at least one of diodes is connected in a direction opposite to the direction in which other diodes are oriented on a current path between the output of the motor and the power supply and on a current path between the output of the motor and the ground.

Power conversion apparatus, electronic steering system, electric vehicle, electronic control throttle and power brake

An electronic control apparatus includes a control unit, a plurality of power supply units for supplying the control unit with power, and a power supply fault detector unit for detecting a fault in the plurality of power supply units. The control unit operates in a normal mode on electric power supplied from the plurality of power supply units when none of the plurality of power supply units is faulty.

Electronic control apparatus

An electronic control apparatus includes a control unit; a plurality of power supply units--for supplying the control unitwith power; and a power supply fault detector unitfor detecting a fault in the plurality of power supply units--. The control unitoperates in a normal mode on electric power supplied from the plurality of power supply units--, when none of the plurality of power supply units--is faulty. If at least one of the plurality of power supply units--is faulty, the control unitoperates in an energy saving mode in which less power is consumed on electric power supplied from the power supply unit that remains fully operational. Thereby an electronic control apparatus is obtained that enables continued operation during a faulty condition, while preventing circuit scale, dimensions, weight, and cost from increasing.

A comparator circuit for comparing outputs of an on-chip redundant system is mounted on a second semiconductor chip that is separate from the on-chip redundant system. The second semiconductor chip which preferably contains a power source circuit for supplying power to the on-chip redundant system, a driver circuit for driving an output circuit, and the like are mounted. With this configuration, the influence of a failure occurring in the on-chip redundancy system can be prevented from being exerted on the comparator measure.

On-chip redundancy high-reliable system and method of controlling the same

An electric power steering drive system provided with a motor with its torque pulsation reduced, and a controller characterized by excellent manufacturability. The stator core of a motor is composed of an annular back core and a plurality of teeth created separately from the back core and secured on the inner periphery of the back core. An 8-pole/9-slot, 10-pole/9-slot or 10-pole/12-slot relationship is found between the number of the magnets of a rotor (number of poles) and the number of slots. The diameter of the stator coil is 1.0 mm or more. A motor controller comprises a power module, a conductor module and a control module. The terminal of the power module and the bus bar of the conductor module are connected by welding, whereas the terminal of the power module and terminal of the control module are connected by soldering.

Controller for electric power steering and electric power steering system

An ignition apparatus for an internal combustion engine has an arrangement comprising a power part and a control part which are accumulated in a one-chip in an IGBT monolithic silicon substrate. The control circuit part has current limiting function of prevent the flowing of any current which is above a predetermined value as well as function of detecting malfunction heat generation by which a primary electric current is blocked compulsorily. The secondary voltage of an ignition coil is generated repeatedly below a plug discharge voltage so as not to generate spark discharge in the sparking plug when the electric current compulsory blocking is carried out, and energy charged in the ignition coil is emitted or discharged. With this arrangement, the one-chip ignition apparatus with high reliability can be achieved.

Ignition apparatus for internal combustion engine and one-chip semiconductor for internal combustion engine igniting

A main IGBT conducts or blocks a primary current flowing through the ignition coil in response to an input ignition control signal to generate a high voltage on the secondary side of the ignition coil. The main IGBT and a current limiter circuit are integrated in a monolithic silicon substrate of an insulating gate bipolar power transistor. The main IGBT has a collector and agate connected through a depletion IGBT forming part of a constant current circuit, and a resistor. When a voltage generated across the resistor becomes equal to or higher than a zener voltage, a zener diode leads this current to an emitter of the main IGBT.

Ignition system for internal combustion engine

A one-chip integration circuit including a power part and a control part integrated within an IGBT monolithic silicon substrate is disclosed. The control circuit part comprises a current limiting circuit for limiting a current so that it does not flow over a set-up value, a reference pulse generating circuit for detecting that an ignition control signal is inputted over a predetermined period of time, a digital timer made up by a digital counter, a latch circuit for dropping the gate voltage of the IGBT by latching due to the digital timer output signal and carrying out resetting when the ignition control signal is off, an input circuit having a potential comparison circuit in its input stage, in which the operation voltage for ignition control signal has a threshold value and a hysterisis, and an input protection circuit having a Zener diode and a resistor connected in parallel therewith for protecting the element from disturbance surges. A one-chip igniter with high operative stability and high reliability can be provided.

Ignition device for an internal combustion engine

Durability and lifetime of a resin sealed electronic device is improved by reducing thermal stresses acting on the power element and the parts mounting on the board. A power element of which the protective film on the power element is coated with a polyimide group resin at manufacturing the element is used, and a metallic heat sink of which the reverse side surface (portion of mounting on a board) is not plated is used. Further, a linear expansion coefficient of the molding resin is within a range of 3&times;10 /&deg;C. to 17&times;10 /&deg;C. The durability and the lifetime of the resin sealed electronic device is improved, because the thermal stresses are reduced by balancing linear expansion coefficients of the parts.

Resin sealed electronic device

Object: The present invention is intended to supply an internal combustion engine-use igniter that is compact, excellent in mountability, and can contribute to the simplification and automation of assembly and to cost reduction. Implementing means: An insulated gate bipolar transistor (IGBT) is used as the ignition coil switching device for the internal combustion engine. The IGBT and a current limiting circuit intended to protect it from an overcurrent are formed on single semiconductor chip , and this semiconductor chip and radio noise reduction capacitor are contained in single packaging unit having external input and output terminals to . Packaging unit is transfer-molded using a material such as epoxy resin.

Igniter for internal combustion engine

Growing community of inventors

Tokai-mura, Japan

Ryoichi Kobayashi