Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corpotation

Shozo Kanzaki

Hiroyoshi Nishizaki

Fumiaki Arimai

Koji Hashimoto

Tomohiro Kimura

Masato Nakanishi

Masahiko Sayama

Shinji Higashibata

Kohji Hashimoto

Mitsunori Nishida

Yasuhiko Kitamura

Yoshikazu Ishida

Kazunari Masudome

Toshiyuki Yasutomi

Hiroaki Takahashi

Ryuichi Ishii

Osamu Nishizawa

Yusuke Matsuda

Yuji Zushi

Yoshitake Nishiuma

Yutaka Takeuchi

Keiichi Arita

Shingo Iguchi

Mikihiko Suzuki

Yasuhiko Kannan

Yuzo Taguchi

Hideyuki Takahama

An electrical power conversion control device of an electric automotive vehicle is obtained which is small in size and inexpensive with lower electric current consumption. In the power conversion control device, insulating power sources are each connected to gate drive circuits to form respective pairs therebetween; electric power whose voltage is regulated as a constant voltage by way of a constant-voltage circuit is supplied from a low-voltage battery to a low-voltage side of an insulating communications circuit, and a high-voltage side of the insulating communications circuit is operated by an insulating power source being at least one insulating power source among the insulating power sources; and a signal of a voltage of a high-voltage battery is insulated from the high-voltage side of the insulating communications circuit and transmitted therefrom to the low-voltage side thereof.

Power conversion control device

An object here is to provide a control device which can be reduced in size, weight and cost while being able to prevent unauthorized access. The control device includes: a microcontroller having a storage device, a processor, a package in which the storage device and the processor are accommodated, and multiple communication electrodes provided on a bottom surface of the package; and a wiring board having wiring layers comprised of a front surface layer, an intermediate layer and a rear surface layer, each having a wiring pattern formed therein, insulating members for insulating the respective wiring layers from each other; interlayer connection portions each making an electrical connection between the wiring patterns in different ones of the wiring layers; multiple electrode pads formed n the front surface layer; and communication-dedicated interlayer connection portions which are electrically connected to the respective electrode pads, and which are each externally exposed.

Control device and manufacturing method of control device

A standby current of an arithmetic control unit configured to execute a control operation based on an activation signal generated by an uncertain manual operation is suppressed. A power supply relay configured to supply power to an arithmetic control unit is driven so as to be closed by a power supply switch, to thereby apply drive control to a main electric apparatus, and apply drive control to an auxiliary electric apparatus in accordance with a composite activation signal generated by an activation signal processing unit responding to closing operations of activation command elements even when the power supply switch is opened. As a result, a standby current generated in the activation signal processing unit is greatly suppressed compared with a case in which the arithmetic control unit is intermittently activated.

Vehicle electronic control device

An electric charging control device is obtained which detects welding abnormality of an electric contactor(s) along charging passages from an electric charging plug reaching a main battery; electric charging contactors and main electric contactors are connected in series; a first voltage monitoring circuit connected between power-supply points Pand N, a second voltage monitoring circuit connected therebetween, and a voltage-level detection circuit connected between the midpoints Pand Nare provided for producing a first voltage detection signal DET, a second voltage detection signal DET, and a main voltage detection signal DET, each of which is a respective determination logic signal responding to the presence or absence of a monitored voltage; and a test voltage is received from either one of the main battery and a ground-based electric charging power-source apparatus, so that the presence or absence of welding abnormality in any one of the contactors is determined.

Electric charging control device

Provided is a power conversion unit, in which a power smoothing capacitor is configured such that a plurality of unit capacitors as conductive polymer hybrid aluminum electrolytic capacitors are arrayed in a grid pattern and connected in parallel on a circuit board, and also connected to a plurality of unit modules of different phases via positive and negative bus bars arranged on both sides of the circuit board so that each group of several unit capacitors and each unit module are arranged close to each other, to thereby reduce wiring impedance of a power supply circuit and suppress noise generation.

Power conversion unit

To downsize a power smoothing capacitor substrate unit for opening/closing modules configured to convert a low-voltage DC power to AC power to drive a three-phase AC motor. A plurality of unit capacitors () being a conductive polymer aluminum electrolytic capacitor are connected between a positive-side first conductive plate (P) connected to a positive-side power supply terminal (P) and a negative-side second conductive plate (N) connected to a negative-side power supply terminal (N), and three or more capacitor rows are arranged for each of three pairs of divided power supply terminal blocks (B) connected to the opening/closing modules (B) and one or more capacitor rows are arranged between the terminal blocks. Accordingly, ripple currents in a large number of capacitors connected in parallel to each other are equalized to prevent a temperature increase in each capacitor.

Capacitor substrate unit for opening/closing module

A plurality of pairs of contact terminals accommodated in a card edge connector include back surface members having one ends to which lead wires are connected and another ends being folded to form movable members. Until a circuit board of a control unit is inserted, end portions of the movable members are held in conductive contact with each other. When the circuit board is inserted, the movable members are separated and brought into contact with copper foil terminals. When the circuit board is removed, the movable members plastically deform and are opposed to each other with an initial gap smaller than a thickness dimension of the circuit board. With this arrangement, wiring inspection may be performed with opposed movable members shorted to one another, but for subsequent circuit board insertion at the second or subsequent insertion and removal of the circuit board, the movable members will be slightly separated by a gap to suppress slide abrasion during insertion.

Card edge connector

An in-vehicle engine control apparatus allowing split injection frequency or split injection of fuel while preventing a driving switch element for fuel injecting electromagnetic coils and a boosting switch element for generating a boosted high voltage from being overheated. An operation control circuit portion has reference data of measured environmental temperature vs allowable engine rotational speed with a selected value of the split injection frequency being a parameter, and determines the selected value having, as an upper limit, a split injection frequency which makes the internal temperature of the boosting switch element or a rapidly exciting switch element a predetermined allowable limit value in association with the present environmental temperature detected by an average environmental temperature detection element in a case and the present engine rotational speed detected by an engine rotation sensor.

In-vehicle engine control apparatus

A circuit board with circuit components mounted thereon is integrally molded with a sealing resin having a sealed end face part that is a thermosetting resin. A cylindrical intermediate adapter is bonded and fixed to the sealed end face part with an opening into which a receptacle body of a connector housing is inserted. A resilient contact connected to a lead wire is caused to be in electrical contact with a copper foil trace terminal of the circuit board. The connector housing and the intermediate adapter are made of a thermoplastic resin resistant to crack failure, which improves handling capability for inserting and withdrawing a connector.

Electronics unit

Second display means front parts, each including an immersion liquid surface level display for a coating liquid for moisture prevention and a lead-free display mark, are formed respectively in upper portions on a left side and a right side that are opposite sides having the one side interposed therebetween. A first display means front part including a board management document number, which defines a material for solder, is formed in a lower portion of the printed circuit board. A lead-free display mark (PBF) is not buried in or mixed with a large number of circuit information displays in the board, and a detailed management number is described in a reduced size to conserve space. Thus, the important lead-free display mark can be displayed with large character marks that also serve to manage a liquid surface.

Electronic board unit

An electronic equipment unit includes a multi-layer circuit board. A part arrangement region on which circuit parts are mounted and a terminal region are provided on the multi-layer circuit board. The part arrangement region is encapsulated with resin. An outline region is formed from a solder resist film surrounding the part arrangement region to prevent the resin from flowing into the terminal region. A non-solder resist region is provided so as to surround the outline region and formation of the solder resist film is inhibited in the non-solder resist region. A clamp abutting surface which is pressed by a mold and surrounds the terminal region and thereby prevents the resin from flowing into the terminal region is a partial region of the multi-layer circuit board where a surface layer circuit pattern is absent.

Electronic equipment unit and manufacturing mold assembly thereof

On-vehicle electrical loads () are connected to an on-vehicle battery () via a series circuit including a load switching element () and a reverse current interrupting element () for a load circuit, and a feeding switching element (A) that is closed in response to closure of a power supply switch (). The element (FET) () is closed when the switch () is closed and a power supply voltage is applied to a load power supply terminal (Vba) connected to the element (A), to thereby be energized in an energization direction of an internal parasitic diode thereof. The element () is de-energized when the switch () is opened. Thus, malfunction is prevented, which occurs when the element (A) is opened, a short-to-power flows backward via the element () into the terminal (Vba) so as to feed power to another device connected to the element ().

On-vehicle electronic control device

A control unit is stored in an airtight housing constituted by a base, an annular peripheral wall member, a cover, and first and second interior packings, second wiring conductors connected to input/output equipment and first wiring conductors connected to a host controller through a control signal connector are brought into press-contact with input/output control terminals of the control unit by first and second pressing elastic mats, the relative positions of associated components are regulated by positioning pins passing through from the cover to the base, and the cover is opened by loosening blockade screws without causing an assembly dimension error or sliding wear of conductive contact portions due to thermal deformation, whereby the control unit is detached.

Electronic control device

In a feed control apparatus that controls a feed state for an inductive load by controlling the opening and closing of a load opening and closing element connected in series to the inductive load, a free-wheeling circuit element employing a field effect transistor is connected in parallel to the inductive load so that a capacitor is charged by opening the free-wheeling circuit element when the load opening and closing element is closed and the free-wheeling circuit element is closed by charges charged to the capacitor when the load opening and closing element is opened. A connection is made in polarity in which a closed-circuit conduction direction in the free-wheeling circuit element is the same as a conduction direction in an internal parasitic diode of the free-wheeling circuit element, and the free-wheeling circuit element conducts backward by a small-capacity capacitor. Consequently, a voltage drop and a temperature rise are reduced.

Feed control apparatus for inductive load with reduced power loss

In an electronic device unit, each of the contact terminals includes a first member coupled to a press-fitting and fixing portion through intermediation of an elastically deformable portion, and a second member being coupled to the first member through intermediation of a folding portion and including a pressure bending portion formed at a terminal end of the second member. An end surface covering resin formed on the circuit board presses a pressure bending portion so that a conductive contact portion formed at the folding portion of the first member is pressed against the board-side terminal substantially in a right-angle direction. Thus, sliding contact between the conductive contact portion and the board-side terminal is diminished.

Growing community of inventors

Tokyo, Japan

Shozo Kanzaki