Other

Hitachi, Ltd.

Takao Kishikawa

Kazuhisa Mori

Satoshi Fukuda

Toshisuke Mine

Tomoharu Sakoda

Takashi Ikimi

Sadao Hokari

Toshifumi Yoshikawa

Naoto Ohnuma

Asako Koyanagi

A power converter is disclosed, in which the sum of the length of that portion of a control signal line which is in opposite relation to an area of a main circuit wiring where a main circuit current flows and a plurality of tabular conductors are in superposed relation with each other, the length of that portion of the control signal line which is in opposite relation to an area of the main circuit wiring where the main circuit current does not flow and the length of that portion of the control signal line which is located outside an end of the main circuit wiring, is substantially equal to the total wiring length of the signal control line.

Power converter

A driving system for driving an AC motor, which is capable of promptly switching to an individual inverter operation mode, wherein a control instruction for each of a plurality of power converters is generated by summing outputs of a plurality of current compensation units connected in parallel, and each of the plurality of current compensation units makes compensation to reduce a deviation of a detected output current value of an associated power converter from a current instruction value to be outputted from the power converter to zero.

Driving system for driving AC motor

A semiconductor electric power conversion device includes a converter unit and an inverter unit, each having a group of parallel capacitors and multiple switching elements. Subdivided positive conductive connections associated with the converter unit and divided positive conductive connections associated with the inverter unit are formed at a positive side conductor connected to capacitors; while divided negative conductive connections associated with the converter unit and divided negative-polarity conductive connections associated with the inverter unit are formed at a negative polarity side conductor, connected to capacitors. The positive and negative polarity conductors have a multilayer structure with a dielectric plate interposed therebetween. Converter positive and negative polarity conductors are formed into a multilayer structure with the dielectric plate sandwiched between them, and inverter positive and negative polarity conductors are formed into a multilayer structure with the dielectric plate sandwiched therebetween.

Semiconductor electric power conversion device

Growing community of inventors

Hitachinaka, Japan

Takao Kishikawa