Mitsubishi Electric Corporation

Asahi Kasei Kabushiki Kaisha

Tomoyuki Taniguchi

Akinu Nakabayashi

Satoshi Murakami

Ryota Kondo

Matahiko Ikeda

Yuya Tanaka

Shingo Kato

Yuichiro Sakamoto

Takashi Kaneyama

Yumiko Kato

Shintaro Wakimura

A feedback control unit includes a controller which calculates a duty ratio for switching elements on the basis of a command value and a detection value of electrical information. A continuous/discontinuous current mode distinguishment unit includes a duty ratio increase/decrease distinguishment unit which performs distinguishment between increase and decrease in the duty ratio, and an output voltage detection value increase/decrease distinguishment unit which performs distinguishment between increase and decrease in a detection value of a voltage of second terminals. If the duty ratio has decreased and the detection value of the voltage has increased, or if the duty ratio has increased and the detection value of the voltage has decreased, the continuous/discontinuous current mode distinguishment unit determines that an operation mode is a discontinuous current mode, and feeds back a result of the determination to the feedback control unit.

Device for controlling power conversion circuit

To provide a power converter which can maintain the stability and the response of the feedback control system, even if the frequency characteristic of the chopper circuit changes according to change of driving condition. A power converter is provided with a chopper circuit which has reactor and switching device; and a control circuit which changes a feedback value of duty ratio of the switching device so that a deviation between a target value of output voltage and a detection value of output voltage approaches to 0, wherein the control circuit changes a frequency characteristic of the feedback control, based on at least any two or more of information on the output voltage, information on an input voltage, and information on duty ratio.

Power converter including a feedback control system

To provide a core material for a fiber reinforced composite having an excellent workability upon being composited with a fiber reinforcing material. A core material for a fiber reinforced composite of the present disclosure comprises a molded product of expanded beads containing a thermoplastic resin, and having a heat shrinkage onset temperature of 80&#xb0; C. or higher, a linear expansion coefficient of 10&#xd7;10mm/mm&#xb7;&#xb0; C. or less, and a ratio of change in dimensions with heating at 130&#xb0; C. of &#x2212;4.0% to 0%.

Core material for fiber reinforced composite and fiber reinforced composite having the same

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Tokyo, Japan

Tomoyuki Taniguchi