Koito Electric Industries, Ltd.

Kazuo Maruyama

Takayuki Izumi

Jun Ito

Hajime Suzuki

Youmei Kaminaga

Tadashi Fujii

Hideto Sanui

Akitaka Samejima

Yukihito Yabuki

Jun Matsunaga

A lighting device includes an indoor lamp (), being provided in the cabin of a railroad vehicle () in order to wholly irradiate the inside of the cabin over the longitudinal direction of the vehicle, a vehicle body power supply (), supplying electric power to the indoor lamp (), and a storage battery (), being charged with a voltage applied by the vehicle body power supply (). The indoor lamp () includes a general lamp light source () and a standby lamp light source (), being lighted at an illuminance lower than that at which the general lamp light source () is lighted, and the general lamp source () being supplied with electric power from the vehicle body power supply () not through the storage battery (), while the standby lamp light source () being supplied with electric power from the vehicle body power supply () through the storage battery (). In an emergency, electric power is supplied from the storage battery () only to the standby lamp light source (), and the standby lamp light source () is continued to be lighted at the low illuminance.

Lighting device

Provided is a power supply adjustment system including: an electronic load whose load voltage is variable; a power supply board that supplies the electronic load with current; and an information processing apparatus that controls the load voltage of the electronic load and the output current of the power supply board to the electronic load on the basis of a current value in the load voltage, in which the information processing apparatus includes a control unit that sets a plurality of load voltages in a predetermined range as the load voltage of the electronic load and sets a correction current value for adjusting the output current to a preset target current value for each of the plurality of load voltages.

Power supply adjustment system and lighting apparatus

A power supply system () according to an embodiment of the present invention includes a first power supply device (), a second power supply device (), and an addition circuit (). The first power supply device () includes a first driving circuit that outputs a first direct current from a first power supply input and a first control circuit that controls the first driving circuit. The second power supply device () includes a second driving circuit that outputs a second direct current from a second power supply input and a second control circuit that monitors the first driving circuit and controls the second driving circuit. The addition circuit () is connected to an output terminal of each of the first and second power supply devices () and outputs a third direct current that is a value obtained by adding the first and second direct currents to a load device (on-board illumination device ()).

Power supply system and railroad car

Growing community of inventors

Shizuoka, Japan

Kazuo Maruyama