Kyoto University

Sumitomo Electric Industries, Limited

Rohm Co., Ltd.

Takashi Hikihara

Atsushi Yamaguchi

Takashi Tsuno

Kenichi Hirotsu

Kentaro Chikamatsu

Satoshi Hatsukawa

Toshikazu Shibata

Ryo Takahashi

Shun-ichi Azuma

Takefumi Shimoguchi

Yuhei Sadanda

Keiji Tashiro

Kohei Nagaoka

Tsuguhiro Takuno

Shun-Ichi Azuma

In a case where passivity-based control is applied to a plurality of circuits connected in parallel, a simpler target state is used. A switching power supply system includes: a plurality of switching power supply circuits connected in parallel to a load R; and a controller configured to switch each of the plurality of switching power supply circuits, through passivity-based control, by using a sum of currents that flow in the plurality of switching power supply circuits.

Passivity-based switching power supply system, controller, and control method

A mixer (power packet generation device)includes switchesA,B, packet generation meansA,B, and a selector. The packet generatorA (B) causes the switchA (B) to perform ON/OFF operation, based on a target voltage, and a voltage estimated as being applied to a loadA (B) in each of a state where a power packet is supplied to the load and a state where no power packet is supplied to the load. The selectorperforms switching between a state where the packet generatorsA,B cause the switchesA,B to perform ON/OFF operation, and a state where the packet generatorsA,B maintain the switchesA,B in their OFF states.

Power packet generation device, power router, and power network

In a gate driver for driving a first transistor, the gate driver includes first, second and third push-pull circuits, in each of the push-pull circuits, two transistors are connected in series, an output terminal of the first push-pull circuit is connected to the gate of the first transistor, an output terminal of the second push-pull circuit is connected to the gate of a second transistor included in the first push-pull circuit and an output terminal of the third push-pull circuit is connected to the gate of a third transistor included in the first push-pull circuit.

Gate driver

To realize a transmission function of power line communication by a further simplified and cost-effective circuit configuration, in a PLC modem installed in an electric appliance such as a household electrical appliance. A semiconductor switching element that is present on an electric circuit connected to a power line is driven by a modulator unit. The modulator unit controls ON/OFF operations of the semiconductor switching element, to thereby cause a communication signal of a modulated rectangular wave to be output to the power line for a prescribed period.

Power line communication device, power supply circuit with communication function, electric appliance, and control and monitoring system

Growing community of inventors

Kyoto, Japan

Takashi Hikihara