Kabushiki Kaisha Toshiba

Sony Corporation

Sony Group Corporation

Toshiba Infrastructure Systems & Solutions Corporation

Toshiba Energy Systems & Solutions Corporation

Yushi Koyama

Hiroshi Mochikawa

Junichi Tsuda

Atsuhiko Kuzumaki

Tomohiro Ito

Yosuke Nakazawa

Mami Mizutani

Ryuta Hasegawa

Ryuichi Morikawa

Koji Maki

Takeru Murao

Kohei Kikuchi

Naotaka Iio

Shunsuke Tamada

Takuro Arai

Shinnosuke Hamajima

A length of a band part is easily adjusted with the same length regardless of the number of adjustments. There are provided an information output unit that outputs information, a band part whose length is adjustable, and a slide part that is movable with respect to the band part in a length direction of the band part. The slide part is attached with a holding magnet, the band part supports a positioning magnet that attracts the holding magnet in a state where the length of the band part is adjusted, and the positioning magnet is made movable with respect to the band part in a length direction.

Information output device

According to an embodiment, there is provided an apparatus which can hold down an energy loss and can avoid an increase in size. The apparatus includes a cell including a floating capacitor connected in parallel to an upper-side switching element and a lower-side switching element; an upper arm include including first switch circuits, each including a first switching element, a first diode and a first capacitor, are connected in series; a lower arm including second switch circuits, each including a second switching element, a second diode and a second capacitor, are connected in series; and a circuit which connects a low-side terminal of the cell and a low-side terminal of the first capacitor and connects a high-side terminal of the cell and a high-side terminal of the second capacitor.

Power conversion apparatus

Provided is a headphone that includes a housing that houses a sound output unit, a slider configured to support the housing, and a support unit attached to a head mounted display. The support unit slidably supports the slider and the support unit is attached to a band of the head mounted display.

Headphones

According to one embodiment, a switch includes a first element with a first withstand voltage, a second element whose withstand voltage is lower than the first withstand voltage, a diode which is connected between a positive electrode of the first element and a positive electrode of the second element in such a manner that a direction from the positive electrode of the second element toward the positive electrode of the first element is a forward direction and whose withstand voltage is equal to the first withstand voltage, a negative electrode of the first element and a negative electrode of the second element being connected, and a circuit configured to apply a positive voltage to the positive terminal output a pulse lower than the first withstand voltage when the first element goes off.

Semiconductor switch and power conversion apparatus

A reactive power compensator according to an embodiment comprises: multilevel inverter circuits respectively constituting each of the three phases; a filter circuit for reducing harmonics connected between the output terminals of each of the multilevel inverter circuits and a power system interconnection terminal; and a control section for causing prescribed three-phase AC voltage to be output by controlling each of said multilevel inverter circuits. Each of the multilevel inverter circuits is constituted by connecting in series one or more single-phase full-bridge single-pulse inverters and is arranged to convert DC voltage to respective positive and negative single-pulse voltages once per cycle of the fundamental wave of the voltage instruction value.

Multilevel reactive power compensator

The present invention includes: an inverterconfigured to perform pulse wide modulation on an output from a DC power source; a first capacitor pairprovided at an input side of the inverter and including two capacitors serially connected to form a neutral point; a second capacitor pairprovided at an output side of the inverter and including two capacitors serially connected to form a neutral point; a bypass path g for a leakage current formed by connecting the neutral point of the first capacitor pair and the neutral point of the second capacitor pair to each other; at least one common mode choke coilprovided between the first capacitor pair and the second capacitor pair and configured to suppress a common mode current generated in the inverter; and an output filterconfigured to convert a voltage, which is outputted from the inverter and subjected to the pulse wide modulation, into a voltage in a sine wave form.

System interconnection inverter with bypass path

According to one embodiment, a grid-tie inverter includes: a inverter performing pulse width modulation for a DC voltage; a first capacitor circuit connected to an input side of the inverter so as to form a neutral point; a second capacitor circuit connected to an output side of the inverter so as to form a neutral point; a common mode current bypass channel formed by connecting the neutral points of the first capacitor circuit and the second capacitor circuit; a grounded capacitor provided between the bypass channel and a ground; a first common mode choke coil unit including a common mode choke coil at least one of between the first capacitor circuit and the inverter and between the inverter and the second capacitor circuit; and an output filter converting a pulse width-modulated voltage outputted from the inverter into a sine AC voltage.

Grid-tie inverter for interconnecting AC voltage to electric power grid

Growing community of inventors

Fuchu, Japan

Yushi Koyama