Hitachi, Ltd.

Lixil Corporation

Mitsubishi Heavy Industries Limited

Panasonic Corporation

Aisin Seiki Kabushiki Kaisha

Nsk Corporation

Hitachi Industrial Equipment Systems Co., Ltd.

Mitsubishi Shipbuilding Co., Ltd.

Daisuke Matsumoto

Yukio Hattori

Akira Mima

Hiroshi Kamizuma

Tetsuya Kawashima

Yuuichi Mabuchi

Takumi Masuda

Hidehiro Nakashima

Ryouhei Miyagawa

Tomonori Ichikawa

Shingen Takeda

Hideaki Tsuzuki

Kenya Hara

Hideaki Tsuduki

Yasuhiro Shimamoto

Sadayoshi Azuma

Takashi Tsukahara

So Suzuki

Shinji Shirakawa

Keiji Yuyama

Masahiro Hiraga

Yousuke Imamura

Naoki Tega

Ippei Ohashi

Hiroshi Chino

Fumihiro Sato

Takanori Kawasaki

Keita Kuramochi

Masato Takeda

Naoki Takata

Yuichi Mabuchi

Kuniaki Yamato

Keisuke Tanabe

Takashi Unseki

Makoto Kawabuchi

Kenji Takemura

Keishi Horiuchi

Hiroshi Kamiduma

Rei Shoji

Shigetoshi Yagihara

Toru Katayama

Ryota Kuroiwa

Masaya Kubota

Takahide Isomura

With the aim of improving the reliability of a power conversion device for driving a motor, this power conversion device is provided with a rectifying portion for rectifying an AC voltage and outputting a DC voltage, a smoothing capacitor for smoothing the DC voltage, an inverter portion into which the DC voltage is input and which outputs AC power, an inverter drive portion for outputting a gate signal to the inverter portion, a regenerative braking portion connected in parallel with the smoothing capacitor, a regenerative braking drive portion for outputting a gate signal to the regenerative braking portion, a control portion for outputting drive signals to the inverter drive portion and the regenerative braking drive portion, a regenerative braking overcurrent detecting portion for outputting an overcurrent detection signal if the current flowing through the regenerative braking portion exceeds a determination value, and a latch portion into which the overcurrent detection signal output from the regenerative braking overcurrent detecting portion is input and which outputs a gate output interruption signal to the control portion, wherein switching elements of the inverter portion and the regenerative braking portion stop in an off state when the regenerative braking overcurrent detection portion detects an overcurrent.

Power conversion device

Provided is a device to prevent filth from collecting on a display of a toilet seat device. A toilet seat device of some embodiments includes a body part having a casing formed so as to be hollow, a toilet seat that is formed so as to be hollow and is supported in the casing; a light emitter that is accommodated in one of the casing and the toilet seat and is provided so as to be capable of emitting light, and a display that is provided at a prescribed location on the one of the casing and the toilet seat, the display indicating an operation state by emitted light from the light emitter. The display is provided with a base part; and a thin-walled part that is formed so as to have a lower thickness than does the base part, the thin-walled part transmitting light and indicating an operation state.

Toilet seat device

Toilet seat unit with private parts-cleaning device

Lavatory pan

Urinal

To improve accessibility with respect to a power conversion unit in a power converter. The power converter includes a circuit connection part including a positive electrode conductor, a negative electrode conductor and an AC conductor, a power semiconductor module positioned in a particular direction with respect to the circuit connection part and connected to the positive electrode conductor, the negative electrode conductor and the AC conductor and a capacitor positioned in the particular direction with respect to the circuit connection part and connected to the positive electrode conductor and the negative electrode conductor. The positive electrode conductor is connected to a positive electrode conductor of another power conversion unit through a unit connection part positioned in an opposite direction of the particular direction with respect to the circuit connection part. The negative electrode conductor is connected to a negative electrode conductor of another power conversion unit through the unit connection part.

Power conversion unit, power converter and method of manufacturing power converter

Toilet seat with bidet

An imbalance of control signals between two power semiconductor elements is reduced. A first power semiconductor module and a second power semiconductor module are arranged in a predetermined direction along a surface of a control signal wiring circuit board, each of longitudinal directions of the first power semiconductor module and the second power semiconductor module along the surface of the control signal wiring circuit board is a predetermined direction, and, in a first control signal wiring, a distance between an external control signal terminal and a second control signal terminal is equal to a distance between the external control signal terminal and a first control signal terminal.

Power conversion unit, power converter, and power conversion method

An uninterruptible power-supply system is a power converter having a PN laminated bus bar and a plurality of power conversion units and supplying power from a commercial power supply via a converter and an inverter. The power conversion units each have positive side terminals connected to each other and negative side terminals connected to each other through the PN laminated bus bar. At least one power conversion unit constitutes a phase of the converter. At least another one power conversion unit constitutes a phase of the inverter and has the positive side terminal lying adjacent to and connected through the PN laminated bus bar to the positive side terminal of the corresponding power conversion unit constituting the phase of the converter and the negative side terminal lying adjacent to and connected to the negative side terminal of the corresponding power conversion unit constituting the phase of the converter.

Power conversion device and power conversion method for power conversion device

A module of conversion circuit includes a High side IGBT, a Low side IGBT connected in series to the High side IGBT, a first terminal connected to the High side IGBT, a second terminal connected to the Low side IGBT, a capacitor connected to the first terminal and the second terminal, and a third terminal connected to a connection point between the High side IGBT and the Low side IGBT. A fourth terminal is engaged with the first terminal. A fifth terminal is engaged with the second terminal. A sixth terminal is engaged with the third terminal. The first and second terminals have at portions thereof between front edges and rear edges high-resistance parts having higher resistance than other portions.

Power conversion apparatus including terminals having higher resistance portions

The present invention reduces the footprint of a power conversion device. A first power semiconductor module and a second power semiconductor module are connected to a positive conductor, a negative conductor, and an alternating-current conductor. An external alternating-current terminal, the first power semiconductor module, the second power semiconductor module, a capacitor, and an external direct-current terminal including an external positive terminal and an external negative terminal are arrayed on a straight line extending in the longitudinal direction of a circuit connection section. The external alternating-current terminal is disposed at one longitudinal end of the circuit connection section. The external direct-current terminal is disposed at the other longitudinal end of the circuit connection section.

Power conversion unit and power conversion device

A cooling structure of a heating element includes: the heating element having at least one cooling surface from which a plurality of pin fins project; a heat receiving plate which has a shape complying with the cooling surface and in which holes are formed at positions facing each pin fin, each pin fin being movably inserted into the holes; a cooler which has a pair of clamping members that sandwich therebetween the heating element and the heat receiving plate while pressing the heating element and the heat receiving plate, and which cools the heat receiving plate; and a space securing part which is provided on the heat receiving plate and suppresses a distance between the pair of clamping members so as not to apply a pressing force by the clamping members to the heating element.

Cooling structure of heating element and power conversion device

Growing community of inventors

Tokyo, Japan

Daisuke Matsumoto