Nissan Motor Company Limited

Sanken Electric Co., Ltd.

Fuji Electric Co., Ltd.

Renault S.a.s.

Other

Sumitomo Metal Mining Company, Ltd.

Kawamura, Atsuo

Yusuke Zushi

Tetsuya Hayashi

Shigeharu Yamagami

Yoshinori Murakami

Satoshi Tanimoto

Shinji Sato

Kohei Matsui

Keisuke Takemoto

Yuji Saito

Yosuke Tomita

Wei Ni

Yasuaki Hayami

Taku Shimomura

Yuki Nakajima

Tomoya Imazu

Takashi Fukushige

Kensuke Sasaki

Toshihiro Kai

Keiichiro Numakura

Yuichi Shibukawa

Takashi Iseki

Akinori Okubo

Yukio Mizukoshi

Atsuo Kawamura

Sho Sato

Tatsuhiro Suzuki

Masato Takamori

Yu Fukushima

Alan Watson

Jon C Clare

Akimitsu Yamamoto

The present disclosure includes a conversion circuit () having a switching element and converting DC voltage into AC voltage by switching operation of the switching element, an isolation transformer () for which an input side is connected to the conversion circuit (), a rectifier circuit () connected to an outside of the isolation transformer (), a resonance circuit connected to the output side of the isolation transformer (), and a control circuit () for controlling the switching element, wherein the control circuit () turning on the switching element in a period when current flowing through resonance circuit flows from a low potential side terminal to a high potential side terminal of the switching element via the isolation transformer ().

Power converting device, and control method for power converting device

The present disclosure includes by controlling at least either one of a switching frequency of a switching element (S) or a duty ratio indicating an ON period of the switching element, securing delay time from voltage at both ends of the switching element reaches zero voltage by resonance of the resonant circuit (L, C) in an OFF state of the switching element until the switching element is turned on, and turning on the switching element within the delay time.

Method for controlling resonance-type power converter, resonance-type power converter, and DC-DC converter

The present invention is related to a control method for controlling a power converter including a first power conversion circuitand a second power conversion circuitby using a control circuit. The first power conversion circuitis connected to a solar cell moduleand a capacitor, converts output power of the solar cell module, and outputs the converted power to the capacitor, the second power conversion circuitis connected to the capacitor, and converts a voltage at a connection terminal connected to the capacitor. The control method comprises step of controlling operation of the second power conversion circuitbased on the output voltage of the solar cell module, to use output power of the second power conversion circuitfor charging the capacitor

Method for controlling power conversion device, and power conversion device

A photovoltaic device includes an organic semiconductor and an inorganic semiconductor. The organic semiconductor includes a photoactive region that generates excitons. The inorganic semiconductor has piezoelectricity and includes a dissociation region for dissociating carriers included in the excitons. A relationship of energy levels between the photoactive region and the dissociation region satisfies at least one equation E&#x3e;Eor equation E&#x3c;E.

Photovoltaic device

An inductor includes a substrate as a base material, a core portion, a coil portion, an insulating portion formed between conductors of the coil portion, and a terminal portion connecting the core portion and the coil portion to the outside. A main direction of a magnetic field that is generated in accordance with current flowing through the coil portion extends in a planar direction of the substrate. In at least a portion of the coil portion, both width and thickness of a rectangular cross-sectional area of the coil portion are larger than the width of the insulating portion.

Inductor

A semiconductor capacitor includes a semiconductor substrate, an electrode group formed on the semiconductor substrate, and a plurality of insulators sandwiched between the electrode groups to form a plurality of capacitors. At least one of the plurality of capacitors is set to be different from at least one of a tolerance, which is a capability of the capacitors to withstand a prescribed voltage, and a conductance, which is an ease with which a leakage current flows in the capacitors.

Semiconductor capacitor

A power conversion device includes a gate voltage adjustment unit (a detection circuit) which acts on a drive signal from a gate drive circuitthat sends a drive signal to the respective gates of a plurality of semiconductor elements Qto Qprovided in parallel, and which adjusts the gate voltages of the semiconductor elements. The gate voltage adjustment unit superimposes an induction voltage generated on the basis of a difference between a magnetic flux due to a current flowing through one of the plurality of semiconductor elements and a magnetic flux due to a current flowing through each of the other semiconductor elements, onto a gate voltage sent to at least one gate of the plurality of semiconductor elements.

Power conversion device with gate drive circuit

In a heat insulating load jigof the present invention, a solder materialhaving a melting point or a solidus temperature in a range between a thermal resistance temperature of a semiconductor chipand a temperature 100&#xb0; C. below the thermal resistance temperature is interposed between a circuit boardand the semiconductor chip; a heat insulating bodyis placed on an upper side of the semiconductor chipin this state; a metal weightis disposed on the heat insulating body; and load is applied to the semiconductor chipwhile the solder materialis melted and solidified.

Method for manufacturing semiconductor device, heat insulating load jig, and method for setting up heat insulating load jig

There is provided a power conversion device including a plurality of Direct Current (DC) power sources (VB) that converts an output voltage of each of the DC power sources into an Alternating Current (AC) voltage, and outputs the converted AC voltage in series connection, and the device includes: a DC/DC converter () connected to each of the DC power sources (VB) to convert the output voltage of the DC power sources; a control device () that controls an output voltage of the each DC/DC converter (); and an H-bridge circuit () provided on the output side of the DC/DC converter () to convert the voltage output from the DC/DC converter () into an AC voltage.

Power conversion device and power conversion method

A power supply device has a first power supply capable of storing and discharging electric power, a second power supply connected in series to the first power supply and capable of storing and discharging the electric power, an isolated DC-DC converter including a primary side terminal to which the first power supply is connected, and a secondary side terminal to which the second power supply is connected, and a power supply control unit that controls a voltage of the second power supply using the isolated DC-DC converter. A direct-current voltage outputted from the first power supply and the second power supply connected in series is inputted to a first inverter, converted into an alternating-current voltage by the first inverter, and then supplied to a vehicle drive motor.

Power supply device and method of controlling the same

An electric drive unit includes an inverter, a stator that receives an AC current from the inverter and forms a magnetic field, a rotor rotated by the magnetic field formed by the stator, a shaft that protrudes into both sides in an axial direction of the rotor and moves in synchronization with the rotor, an inverter casing that stores the inverter in a galvanic isolation state, and a motor housing. The motor housing stores the stator and the rotor in a galvanic isolation state, rotatably supports one end of the shaft using a first bearing, and rotatably supports the other end of the shaft using a second bearing. The inverter and the inverter casing are arranged in an inner side from a pair of bearings including the first and second bearings.

Electric drive unit

A method for manufacturing a semiconductor device is carried out by readying each of a semiconductor element, a substrate having Cu as a principal element at least on a surface, and a ZnAl solder chip having a smaller shape than that of the semiconductor element; disposing the semiconductor element and the substrate so that respective bonding surfaces face each other, and sandwiching the ZnAl eutectic solder chip between the substrate and the semiconductor element; increasing the temperature of the ZnAl solder chip sandwiched between the substrate and the semiconductor element while applying a load to the ZnAl solder chip such that the ZnAl solder chip melts to form a ZnAl solder layer; and reducing the temperature of the ZnAl solder layer while applying a load to the ZnAl solder layer.

Method for manufacturing semiconductor device, and semiconductor device

A semiconductor module has a pair of semiconductor devices, a heat sink, a first electrode, an output electrode and a second electrode. The semiconductor devices are connected in series with each other and have first terminals that are electrically connected to a first power system and a second terminal that is electrically connected to a second power system. The first electrode is electrically connected both to one of the first terminal and to an electrode of one of the semiconductor devices. The output electrode is electrically connected both to the second terminal and to an electrode of the other of the semiconductor device. The second electrode is electrically connected to the other of the first terminals. The second electrode is connected to the heat sink via a first insulating member. The output electrode is connected to the second electrode via a second insulating member.

Semiconductor module

A switching circuit includes: a first switching element (Q); a resistor () inserted between a control electrode (G) of the first switching element (Q) and a control circuit () switching the first switching element (Q); and a first capacitor () and a second switching element () connected in series between the control electrode (G) of the first switching element (Q) and a low potential-side electrode (S) of the first switching element (Q). A high potential-side electrode of the second switching element () is connected to the control electrode (G) of the first switching element (Q). An electrode of the first capacitor () is connected to the low potential-side electrode (S) of the first switching element (Q). A control electrode of the second switching element () is connected to an electrode of the resistor () connected to the control circuit ().

Switching circuit and semiconductor module

A motor is basically provided with a rotor and a stator. The stator includes a plurality of stacked magnetic entities, a dielectric material disposed between adjacent ones of the magnetic entities, a positive electrode part provided on at least one of the magnetic entities and a negative electrode part provided on at least one of the magnetic entities that does not have the positive electrode part. The positive electrode part is arranged for connecting to a positive side of an external circuit. The negative electrode part arranged for connecting to a negative side of the external circuit.

Growing community of inventors

Kanagawa, Japan

Yusuke Zushi