Toshiba Mitsubishi-electric Industrial Systems Corporation

Ntt Docomo, Inc.

Mitsubishi Heavy Industries Limited

Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Dipsol Chemicals Co., Ltd.

Ryo Nakajima

Kenichiro Omote

Takashi Matsunaga

Kazuhiro Watanabe

Keisuke Yamamoto

Shinichi Sato

Manabu Inoue

Mao Asai

Kazuhiro Satoh

Masaharu Nakatsuchi

Kenji Oda

Kosaku Ichikawa

Kimitaka Watanabe

Kumiko Yamaguchi

Takaaki Oshima

Tetsuhiro Tanno

Katsumi Takagi

Masatsugu Monde

Mitsuo Onoue

Naotaka Iio

Yuta Ichikura

Makoto Mukunoki

Daisuke Yoshizawa

A power conversion apparatus is provided to prevent the arc flash generated in a board from flowing out to a operation surface for operating the board, and also to relieve the pressure inside the board to the outside from the flapper section provided on the ceiling. The power conversion apparatus that has taken measures against an arc flash composed of a power converter and a board accommodating the power converter is provided. A BUS which constitutes the power converter has the first processing that makes it hard to fly the flash in a place where arc flash is not desired to occur. A door is placed on the front board that can be opened and closed by the operator. The board has an explosion-proof shutter part to prevent the arc flash from being released to the outside by the pressure inside the board, and has a flapper section for releasing the pressure inside the board to the outside from the ceiling of the board unit, when the arc flash occurs.

Housing for power conversion apparatus

A rear flap configuration for an amphibious vehicle includes a vehicle body, a pair of crawlers disposed on both right and left sides with respect to a traveling direction of the vehicle body, and a rear flap connected to a rear part of the vehicle body. The vehicle body has a rear surface including a departure angle surface which extends obliquely upward from a lower edge of the rear surface as the vehicle body extends rearward. The crawlers have upper surfaces positioned above the lower edge, lower surfaces positioned below the lower edge, and rear edges projecting rearward from the lower edge. The rear flap includes a flap body part having a facing edge which faces the lower edge between the crawlers and is vertically rotatably connected to the vehicle body so as to allow the facing edge to come into contact or close proximity with the lower edge.

Rear flap configuration for amphibious vehicle

To provide a pressure contact type semiconductor device stack which can uniformly pressurize pressure contact type semiconductor devices irrespective of presence or absence of a notch portion of the pressure contact type semiconductor device, and can prevent thermal destruction of the relevant pressure contact type semiconductor device. A pressurizing device for pressurizing between pressure contact type semiconductor devices and heat sinks which have been stacked is provided with pressuring bodies arranged at the upper and lower surfaces, metal fittings for insulating plate each for distributing a pressure applied by the pressuring body to an outer circumferential surface, and insulating plates each for pressuring the relevant heat sinks by the pressure applied to a pressurizing surface of the relevant metal fitting for insulating plate, the pressure contact type semiconductor device has a notch portion at a part of a peripheral portion of a post surface of any one of a collector post surface or an emitter post surface, and a device for making a distance from a pressurizing surface of the metal fitting for insulating plate pressurized by the upper surface pressurizing body to a front surface of a chip equal to a distance from a pressurizing surface of the metal fitting for insulating plate pressurized by the lower surface pressurizing body to a back surface of a chip is provided.

Pressure contact type semiconductor device stack

An amphibious vehicle includes: an engine; at least one land traveling device; at least one water propelling device; a power distribution device configured to distribute power outputted from the engine between land travel power to be supplied to the at least one land traveling device and water propulsion power to be supplied to the at least one water propelling device; a slippage-amount detection device configured to detect a slippage amount of the at least one land traveling device relative to ground; and a controller configured to adjust at least the land travel power, of the land travel power and the water propulsion power, on the basis of the slippage amount detected by the slippage-amount detection device. The controller is configured to reduce the land travel power if the slippage amount detected by the slippage-amount detection device is greater than a threshold while the land travel power and the water propulsion power are supplied respectively to the at least one land traveling device and the at least one water propelling device for landing from water to land.

Amphibious vehicle and control method for the same

It is an object of the present invention to provide a processing solution used for forming a hexavalent chromium free, black conversion film, which is applied onto the surface of zinc or zinc alloy plating layers, and which has corrosion resistance identical to or higher than that achieved by the conventional hexavalent chromium-containing conversion film.

Processing solution for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers, and method for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers

A secure element (SE) unitholding service data used by an application is provided in a UIM card. Thus, when the user identify module (UIM) cardis transferred between portable terminals, service data and accompanying information of the application can be moved together with the UIM cardto another portable terminal. In addition, an access management unitincluded in a portable terminalcompares UIM information of a UIM information storage unitwith UIM information, held by an authority information holding unit, of a UIM card of which use authority is possessed by an application. If they do not agree, access to service data stored in the SE unitis restricted.

Access management system and access management method

Power converter

A communication terminal includes: an application control unit that controls execution of an application; a communication control unit that controls a communication unit to establish communication with a communication network, and a suspension control unit that, after detecting a terminal operation that becomes a factor in suspending the application, transmits a suspend command to suspend the application that is running to the application control unit. The suspension control unit is, in response to the terminal operation thus detected, capable of selecting a keep-alive state for transmitting the suspend command to the application control unit without disconnecting communication connection with the communication network by the communication unit. The communication terminal prevents unnecessary disconnection of communication by a suspend operation and improving convenience and comfortableness of application operation.

Communication terminal and application control method

A power converter apparatus, including a DC power source, a semiconductor stack, connected to the DC power source in parallel, having a plurality of semiconductor devices and a cooler for refrigerating the semiconductor devices, the semiconductor devices and the cooler are stacked and pressured to each other, and a snubber circuit, connected to the DC power source in parallel, having a serial circuit of a capacitor and a diode, and a resistor connected in parallel to the diode, one terminal of the capacitor is disposed adjacent to the semiconductor stack so that magnetic flux generated by current flowing in the terminal cancels magnetic flux caused by current flowing in the semiconductor stack.

Power converter apparatus

Growing community of inventors

Tokyo, Japan

Ryo Nakajima