Mitsubishi Denki Kabushiki Kaisha

Eisai Company, Limited

Yoshihiro Iwasaki

Hiroaki Suzuki

Makoto Tanikawa

Isao Kawasaki

Hitoshi Tanifuji

Takahiro Ishigami

Yoshihiko Kikkawa

Masahito Mori

Keisuke Watanabe

Toru Naraki

Ichiro Minejima

Provided are, a converter section ( ) which converts a commercial AC voltage (V ) into a DC voltage (V ); an inverter section ( ) which converts the DC voltage (V ) into an output AC voltage (V ) of a predetermined frequency by a pulse-width modulation system based on an assigned PWM width, and supplies the output AC voltage (V ) to a compressor motor ( ). Further, an instantaneous DC voltage detecting section ( ) detects an instantaneous DC voltage (V ); and an arithmetic processing section ( ) corrects the PWM width so as to maintain the output AC voltage (V ) at a desired value following the variation in the instantaneous DC voltage (V ). It is possible to operate a compressor motor ( ) in an optimum state of load characteristics and efficiency.

Inverter control apparatus

An apparatus which secures a heat sink to an electrical component connected to a circuit board, including a first outer cover which engages a portion of the heat sink and a portion of the circuit board. In addition, the first outer cover encloses the electrical component, and the electrical component has at least two pins, a first surface facing the circuit board, and a second surface facing the heat sink. Further, a majority of heat dissipating surfaces of the heat sink are outside a space enclosed by the first outer cover and the circuit board.

Power transistor module packaging structure

To provide a simple immunochemical assay of a PIVKA of every kind (PIVKA-VII, -IX, -X, -C, -S or -Z: protein induced by vitamin K absence) corresponding to a vitamin K-dependent protein. It has been confirmed that a PIVKA of every kind can be determined according to the double antibody sandwich method wherein use is made of a solid-supported anti-PIVKA-II monoclonal antibody. There is also disclosed a reagent for determination of a PIVKA of every kind according to the above-mentioned method.

Method of determination of pivka

Growing community of inventors

Tokyo, Japan

Yoshihiro Iwasaki