Mitsubishi Electric Corporation

Tomoko Takasuka

Mitsuru Tsukima

Katsuhiko Horinouchi

Tsuguhiro Takuno

Makoto Kanemaru

Satoshi Ishikura

Toshihiko Miyauchi

Mitsugi Mori

Takuya Ohkubo

Hiroto Yuki

The semiconductor circuit breaker includes a semiconductor switch unit connected to an AC circuit, and a phase control unit that controls conduction and non-conduction of the semiconductor switch unit by the control signal. The phase control unit includes an accident detection unit to detect an accident based on a current detected from the AC circuit, a zero point detection unit to detect a current zero point based on the current detected from the AC circuit, and a control signal output unit to output the control signal for setting the semiconductor switch unit to be non-conductive when the accident detection unit detects the accident or when the zero point detection unit detects the current zero point in response to a command to cut off the current.

Semiconductor circuit breaker and circuit breaking device

The power transmission mechanism abnormality diagnostic device includes a monitoring diagnosis unit for performing determination as to abnormality of a power transmission mechanism, and a current detector connected to a power supply of an electric motor, wherein the monitoring diagnosis unit includes an analysis unit for analyzing current transmitted from the current detector and an abnormality determination unit for performing determination as to abnormality of the power transmission mechanism on the basis of a result of analysis by the analysis unit.

Abnormality diagnostic device for power transmission mechanism and abnormality diagnostic method for power transmission mechanism

In an electromagnetically moving device, a magnetic-flux variation measuring unitis placed at a position which is outside a closed magnetic path established when a movable coreand a stationary coreare being attached to each other due to permanent magnets, and at which a leakage magnetic-flux variation due to movement of the movable corecan be measured, so that a behavior of a movable part in a switch, etc. is estimated such that an inflection point time is calculated from the measurement of time-series data of the magnetic-flux variation.

Electromagnetically moving device

Growing community of inventors

Chiyoda-ku, Japan

Tomoko Takasuka