Kabushiki Kaisha Toshiba

Tomotsugu Ishizuka

Shigeru Tanaka

Kazuhiro Nakajima

Tokihiro Umemura

Noriko Kawakami

Akihisa Kataoka

Koichi Hidese

A control apparatus for controlling a three- or single-phase semiconductor power converter employing fixed-pulse switching patterns superposes a DC component on an AC output voltage, to suppress asymmetrical magnetization of a transformer connected to the power converter. The three-phase semiconductor power converterprovides an AC output. The voltage of the AC output is changed by the transformer. The control apparatusfor controlling the power converterincludes an asymmetrical magnetization suppressive controllerto generate a correction value for each of basic fixed-pulse switching patterns to be applied to three-phase switching elements of the power converter, a phase correctorto switch the correction values from one to another at timing when no switching operation is carried out at any one of the switching elements, and a pattern generatorto correct the basic fixed-pulse switching patterns according to the correction value provided by the phase correctorand provide the corrected switching patterns.

Control apparatus for semiconductor power converter

A power control device includes an electric power storage device connected across a power supply line for a load and including at least one electric double layer capacitor (EDLC) bank and a secondary battery combined with the EDLC bank, the EDLC bank including a plurality of parallel-connected rows of EDLC unit cells, each of the rows including a plurality of series-connected EDLC unit cells, and a control device controlling the electric power storage device so that when an input power to the electric power storage device is interrupted, the EDLC bank supplies electric power to the load for an initial period of the power interrupt and subsequently, the secondary battery supplies electric power to the load.

Power control device with electric double layer capacitor unit cells

Growing community of inventors

Tokyo, Japan

Tomotsugu Ishizuka