Hitachi, Ltd.

Hitachi Automotive Systems, Ltd.

Keio University

Kabushiki Kaisha Yakult Honsha

Hitachi Construction Machinery Co., Ltd.

Hitachi Astemo Ltd.

Hitachi Industrial Products, Ltd.

Shinji Sugimoto

Hiroyuki Takahashi

Yasuhiro Naka

Noriaki Hino

Yasuyuki Saito

Kenichi Nakayama

Yusuke Tanigawara

Tsuyoshi Goto

Akito Nishimuta

Yutaka Matsunobu

Tetsuya Suzuki

Akinori Kamiya

Akeshi Takahashi

Sayo Suzuki

Kazuo Nishihama

Satoru Kaneko

Yoshitaka Iwaji

Takashi Ishigami

Satoshi Kikuchi

Kohji Maki

Akitoyo Konno

Shigeru Kakugawa

Masatsugu Arai

Mamoru Kimura

Mikio Endo

Eiichi Ide

Masashi Kitamura

Tadashi Osaka

Koji Obata

Takayoshi Nakamura

Akiyoshi Komura

Daisuke Kori

Mitsuhiro Watanabe

Makoto Ito

Yoshiaki Igarashi

Naoki Fukuda

Takeshi Matsuzaki

Tomoaki Kaimori

Seikichi Masuda

Shoichi Maruyama

Makoto Imura

Shunsuke Otake

Masayasu Fujieda

Naoki Kunihiro

Hidehiro Irie

Eri Arita

Yasuko Yamayoshi

Yusuke Ikoma

Masatoshi Koike

Yuji Kanazawa

Hirotaka Kinoshita

Miki Tanaka

Kanako Hara

Yuki Fukuoka

A winding switching device switches parallel and series connections of windings of a rotating electric machine, and includes a plurality of electrodes that are connected to the windings and a power source, a movable portion in contact with the plurality of electrodes and includes a plurality of conductor portions, and an actuator that drives the movable portion. According to a contact state between the plurality of electrodes and the plurality of conductor portions, the windings are connected in parallel at a first position of the movable portion, and are connected in series at a second position of the movable portion. The electrodes include a first electrode connected to a first phase winding of the rotating electric machine in the plurality of windings, and a second electrode connected to a second phase winding. The first electrode and the second electrode are adjacent to each other, and form a neutral point.

Winding switching device of rotating electric machine, rotating electric machine drive system, and electric device

A rotary machine driving system includes: a rotary machine including a plurality of coils; an inverter device configured to operate the rotary machine at a variable speed, including a control device for controlling power conversion by an inverter circuit, and a coil switching device for switching a connection of the coils according to the control device. The control device commands the coil switching device to switch the connection of the coils when rotation of the rotary machine transitions between a low-speed rotation range and a high-speed rotation range due to acceleration and deceleration. A starting end and a terminal end of at least one set of coils per phase of the rotary machine are drawn out in a freely connectable state. The coil switching device includes at least one movable portion driven by one actuator.

Rotary machine driving system and vehicle

A rotating machine drive system includes: a rotating machine that includes a plurality of windings; a phase current detecting circuit that detects a phase current to be supplied to the rotating machine; an inverter device that includes an inverter circuit that converts DC power from a DC power supply into AC power, and a control device that controls power conversion being performed by an inverter main circuit on the basis of the phase current detected by the phase current detecting circuit, the inverter device operating the rotating machine at a variable speed; and a winding switching device that switches connections of the plurality of windings in accordance with a command from the control device. In a case where the rotation zone of the rotating machine is to be changed, the control device stops the current supply from the inverter circuit to the rotating machine, and switches the rotation zone of the rotating machine from a low-speed rotation zone to a high-speed rotation zone, or from the high-speed rotation zone to the low-speed rotation zone, on condition that a line internal voltage induced by a field magnetic flux of the rotating machine is lower than the DC voltage of the DC power supply.

Rotating machine drive system

A dump truckincluding: an engine; a generatordriven by the engine; and a pair of driving wheelsL andR arranged to the left and right of a vehicle body frameincludes: a traveling electric motorL including a plurality of electric motorsLa,Lb, andLc that are coupled to the driving wheelL and simultaneously drive the driving wheelL; and a traveling electric motorR including a plurality of electric motorsRa,Rb, andRc that are coupled to the driving wheelR and simultaneously drive the driving wheelR. Thereby, drive systems corresponding to loads of dump trucks or the like can be configured using identical components.

Electrically driven work vehicle, and wheel electric driving unit

A rotating electric machine includes a stator having a stator coil and a rotor provided rotatably around a specific rotation axis with respect to the stator. The rotor includes a plurality of magnets, a plurality of magnetically-assisted salient pole members provided between poles of any adjacent two magnets from among the plurality of magnets, and a magnetoresistance variation unit provided in the magnetically-assisted salient pole member along an axial direction of the rotation axis at a position offset in a circumferential direction of the rotation axis from a q-axis passing through a salient pole center of the magnetically-assisted salient pole member. The amount of offset of the magnetoresistance variation unit from the q-axis varies depending on positions of the magnetically-assisted salient pole members so that torque fluctuations cancel each other when power is applied.

Electric machine with q-offset grooved interior-magnet rotor and vehicle

An object of the invention is to provide a power converter that can be reduced in size. To achieve this, a power converter according to the invention includes: water passages arranged radially from an assumed central axis, each being trapezoid-shaped in cross section; and power modules placed between the water passages such that each of the power modules is sandwiched from both surfaces thereof by the water passages. Each of the power modules has an output terminal and positive and negative terminals on an end face located in a centrifugal direction side with respect to the assumed central axis. Any of the power modules and an adjacent one of the power modules are set in a front-back inverted manner.

Power converter having water passages for cooling power modules

Electric machine with Q-offset grooved interior-magnet rotor and vehicle

A rotating electric machine includes a cooling frame. The cooling frame includes a flow passage through which the first liquid coolant circulates, a flow inlet connected to one end of the flow passage so as to make the first liquid coolant flow from the outside into the flow passage, and a flow outlet connected to the other end of the flow passage so as to make the first liquid coolant having flown through the flow passage flow to the outside. The machine is configured that, when the flow passage is divided into a front half portion closer to the flow inlet and a latter half portion closer to the flow outlet, the front half portion becomes a portion where the first liquid coolant mainly cools the second liquid coolant, and the latter half portion becomes a portion where the first liquid coolant mainly cools the gas coolant.

Rotating electric machine having a cooling frame with a plurality of coolants

To provide a marker for determining sensitivity of a patient to an anti-cancer agent, and novel cancer therapeutic means employing the marker. The marker for determining sensitivity to an anti-cancer agent is formed of a protein selected from the group consisting of a protein or a fragment thereof which is detected as a peak at m/z of 16,450 to 16,620, a protein or a fragment thereof which is detected as a peak at m/z of 22,080 to 22,310, and a protein or a fragment thereof which is detected as a peak at m/z of 17,100 to 17,270, the peaks being determined by means of a mass spectrometer.

Method for determining sensitivity to an anticancer agent

Provided are an marker for determining sensitivity to an anticancer agent capable of distinguishing a therapeutic response of an individual patient and a novel means for a cancer therapy using the marker. The marker for determining sensitivity to an anticancer agent contains a calcium-binding protein S100A7, S100A8, or S100A10.

Method for determination of sensitivity to anti-cancer agent

Provided are a marker for determining sensitivity to an anticancer agent capable of distinguishing a therapeutic response of an individual patient and a novel means for a cancer therapy using the marker. The marker for determining sensitivity to an anticancer agent contains a substance in a metabolic pathway in which L-phenylalanine and/or N,N-dimethyl glycine are/is involved.

Marker for determination of sensitivity to anti-cancer agent

A rotating electric machine includes a stator and a rotor. Each of magnetic poles of the rotor includes a magnet insertion hole, a permanent magnet that is inserted in the magnet insertion hole, and a nonmagnetic portion formed between the permanent magnet and an auxiliary salient pole. A portion of the rotor core located toward the stator relative to the nonmagnetic portion function as a bridge portion connecting a magnetic pole peace with the auxiliary salient pole. A side of the nonmagnetic portion located toward the stator includes a first side at the bridge portion, extending along a virtual circular arc passing through the permanent magnet insertion hole closest to the stator, and a side of the nonmagnetic portion located toward the auxiliary salient pole includes a second side extending away from the stator, with the first side and the second side connected through a curved line.

Rotating electric machine and automobile

Growing community of inventors

Hitachi, Japan

Shinji Sugimoto