Canon Kabushiki Kaisha

Nissan Motor Company Limited

Rohm Co., Ltd.

Takuma Kobayashi

Nobuyoshi Takehara

Naoki Manabe

Yuki Nakano

Masatoshi Aketa

Tsunenobu Kimoto

Nobuhiro Mori

Shinichi Matano

Tatsuya Shindou

Minoru Kaho

A semiconductor device includes a SiC semiconductor layer that has a carbon density of 1.0×10cmor more, a SiOlayer that is formed on the SiC semiconductor layer and that has a connection surface contiguous to the SiC semiconductor layer and a non-connection surface positioned on a side opposite to the connection surface, a carbon-density-decreasing region that is formed at a surface layer portion of the connection surface of the SiOlayer and in which a carbon density gradually decreases toward the non-connection surface of the SiOlayer, and a low carbon density region that is formed at a surface layer portion of the non-connection surface of the SiOlayer and that has a carbon density of 1.0×10cmor less.

Semiconductor device with carbon-density-decreasing region

A semiconductor device includes a SiC semiconductor layer that has a carbon density of 1.0&#xd7;10cmor more, a SiOlayer that is formed on the SiC semiconductor layer and that has a connection surface contiguous to the SiC semiconductor layer and a non-connection surface positioned on a side opposite to the connection surface, a carbon-density-decreasing region that is formed at a surface layer portion of the connection surface of the SiOlayer and in which a carbon density gradually decreases toward the non-connection surface of the SiOlayer, and a low carbon density region that is formed at a surface layer portion of the non-connection surface of the SiOlayer and that has a carbon density of 1.0&#xd7;10cmor less.

A structure for arranging a heat-generating electric component in an automobile has a heat-generating electric component, and a duct extending from an air conditioning unit. The heat-generating electric component and the duct are disposed between a seat and a floor surface of the automobile. An air outlet hole is formed in the heat-generating electric component, through which air on an inside of the heat-generating electric component is discharged to cool the inside. An exit of the duct is disposed near the air outlet hole of the heat-generating electric component.

Structure for arranging heat-generating electric component in automobile

In an electric vehicle, high-power unit () disposed in motor room () to supply drive current to motor drive unit (), and battery pack () disposed below vehicle body floor () are connected to each other through charging/discharging harness (). High-power unitincludes unit back surface (high-power module back surface) () that faces dash panel (), and harness connection concave portion () recessed from unit back surface () toward an inside of high-power unit (), wherein charging/discharging harness connection terminal () to which one end () of charging/discharging harness () is connected is disposed inside of harness connection concave portion ().

Charging/discharging harness routing structure in electric vehicle

In a power generation system which includes a plurality of sets of direct current power sources and power converters which are connected to the direct current power sources to convert a direct current power into an alternating current power, the power converters being connected in parallel to supply the alternating current power to a system power supply, from the plurality of power converters in the system, one power converter is set as a master machine which detects an islanding operation state in which power supply from the system power supply is stopped, and setting is executed so as to cause the remaining power converters not to detect the islanding operation state. When the master machine is not present among the power converters in operation, the master machine is selected from the power converters in operation in accordance with a predetermined condition.

Power generation system, and administration apparatus and administration method of power generation system

A method of controlling a semiconductor device using a microcomputer having a timer is provided. An interrupting step interrupts the semiconductor device using the timer, by generating a control signal for controlling a timing of turning on/off the semiconductor device. The interrupting step is performed in accordance with an interrupting signal which is input to the microcomputer at every occurrence of a predetermined period. The interrupting step comprises a setting step of giving a set value to the timer and a calculating step of determining a set value for a subsequent interrupting step, such that the set value determined in the calculating step is given to the timer in the setting step of the subsequent interrupting step. Therefore, a longer time can be allowed for determining a set value for the timer, and the processing speed required for the microcomputer can be reduced.

Method of controlling signal generator

When a measuring system for a solar battery is operated and controlled by one execution program, the execution program is roughly divided into a program portion corresponding to measurement of a sunshine time in one day and a program portion corresponding to measurement for several to about 20 years. In this case, even a small error in part of the program may stop the entire measuring system. To prevent this, the program is divided into an execution program for acquiring data, an execution program for generating information to be displayed, on the basis of the acquired data, and an execution program for recording the acquired data in a recording medium. Interprocess communication is used to exchange data between the execution programs.

Display and acquisition of data, exchanged by interprocess, for the physical properties of a solar battery

The temperature of a bypass diode of a solar cell module is measured by a temperature detector from the exterior of the solar cell module, and the results of temperature detection of each bypass diode are mutually compared to detect the presence or absence of failure in the solar cell module. Also at least one solar cell in the solar cell module is covered with a light shielding plate, then a current flowing in the bypass diode bypassing to the covered solar cell is detected, and a failed solar cell module is detected from the result of the current detection. Also the solar cell module is provided with a temperature detector capable of detecting the temperature of the bypass diode and the temperature of an internal portion of the solar cell module other than the bypass diode. In this way, it is possible to detect a failure in the solar cell module easily and precisely, and also to detect short circuit failure in the solar cell.

Method and apparatus for detecting failure in solar cell module, and solar cell module

This invention is a power converter integrated solar cell module having a power converter mounted on the rear surface of a solar cell module. This solar cell module has a structure by which the power converter is attached to a low-temperature portion on the solar cell module rear surface.

Growing community of inventors

Kyotanabe, Japan

Takuma Kobayashi