Kabushiki Kaisha Toshiba

Naohiko Shimura

Motofumi Tanaka

Toshiki Osako

Hisashi Matsuda

Hiroyuki Yasui

Masahiro Asayama

Yutaka Ishiwata

Shohei Goshima

Kunihiko Wada

Tamon Ozaki

Takeshi Imamura

Susumu Kinoshita

Kazuo Hayashi

Shinichi Noda

Masahiro Katayama

Sueyoshi Mizuno

Toshimasa Yamada

Noboru Segawa

Yutaka Uchida

Shinya Nakayama

Tatsuro Uchida

Kenichi Yamazaki

Takao Hattori

Kazunori Shioda

Yuuta Onishi

Daishin Okada

Tadayoshi Hanafusa

Takumi Oikawa

An airflow generator power supply of an embodiment supplies alternating-current voltage to a plurality of airflow generators on a blade of a wind turbine generator. The power supply has a frequency converter, a plurality of transformers, and a switch. The frequency converter generates alternating-current voltage. Each transformer amplifies the alternating-current voltage and applies the amplified voltage to the corresponding airflow generator. The switch outputs the alternating-current voltage from the frequency converter to one selected from the transformers.

Airflow generator power supply and wind turbine generator

There is provided an airflow generation device and the like capable of suppressing an increase in a number of poles of a slip ring, and effectively preventing a malfunction from occurring due to a generation of noise caused by the slip ring. An airflow generation device of an embodiment has a main body, a rotation speed detecting unit, and a voltage application unit. The main body has a first electrode and a second electrode provided to a base formed of a dielectric, and is disposed on a rotary body. The rotation speed detecting unit detects a rotation speed of the rotary body. The voltage application unit generates an airflow by applying a voltage between the first electrode and the second electrode based on the rotation speed detected in the rotation speed detecting unit. Here, the voltage application unit and the rotation speed detecting unit are disposed in the rotary body.

Airflow generation device and wind power generation system

A vortex generating apparatus includes: a member to contact with a flow of a fluid to form a stagnation point and a first and a second separation points on a periphery of a cross section of the member parallel to the flow; a disturbance applying unit to apply a disturbance to an upstream side of the first separation point to cause part of a boundary layer of the flow to adhere; and a controller to temporally control the application of the disturbance to change an adhesion distance from the stagnation point to the first separation point so as to generate a dynamic stall vortex.

Vortex generating apparatus and vortex generating method

A wind power generation system has a windmill, a lift improvement device, a power generator, a storage, and a controller. The windmill rotates when receiving an airflow. The lift improvement device has a capability of operating and halting, the lift improvement device increases a lift force to a blade of the windmill when operating. The power generator generates power by rotation of the windmill and a torque is generated in a direction suppressing rotation of the windmill. The storage stores a plurality of characteristic maps indicating characteristics of the torques of the power generator in relation to rotation speeds of the power generator. The controller controls a power generation amount of the power generator by switching and using the plurality of characteristic maps of the storage in correspondence with a state of operating or halting of the lift improvement device.

Wind power generation system and wind power generation method

An airflow generation device of an embodiment has a main body and a voltage application unit. The main body has a base formed of an insulating material and provided with a first electrode and a second electrode. The voltage application unit generates an airflow by applying voltage between the first electrode and the second electrode. Here, the main body is formed to include a portion which gradually decreases in thickness from a center portion to an end portion.

An airflow control devicein an embodiment includes: a vortex shedding structure portiondischarging an airflow flowing on a surface in a flow direction as a vortex flow; and a first electrodeand a second electrodedisposed on a downstream side of the vortex shedding structure portionvia a dielectric. By applying a voltage between the first electrodeand the second electrode, flow of the airflow on the downstream side of the vortex shedding structure portionis controlled.

Airflow control device and airflow control method

A wind power generation systemof an embodiment includes a rotorhaving a huband blades, a nacellepivotally supporting the rotor, a towersupporting the nacelle, an airflow generation deviceprovided in a leading edge of each of the bladesand having a first electrodeand a second electrodewhich are separated via a dielectric, and a discharge power supplycapable of applying a voltage between the electrodes of the airflow generation device. Further, the system includes a measurement device detecting information related to at least one of output in the wind power generation system, torque in the rotorand a rotation speed of the blades, and a control unitcontrolling the discharge power supplybased on an output from the measurement device.

Wind power generation system and control method for the same

A wind power generation systemof an embodiment includes a rotorhaving blades, an airflow generation deviceprovided in a leading edge of each of the bladesand having a first electrodeand a second electrodewhich are separated via a dielectric, a discharge power supplyapplying a voltage between the electrodes of the airflow generation device, and a control unitcontrolling the discharge power supply. The control unitcontrols the voltage to perform pulse modulation so that the value of a relational expression fC/U is 0.1 or larger and 9 or smaller where f is a pulse modulation frequency of the voltage, C is a chord length of the blades, and U is a relative velocity combining a peripheral velocity of the bladesand a wind velocity, so as to generate plasma induced flow.

In one embodiment, an air current generating apparatus includes: a dielectric substrate exposed to gas: a first electrode disposed inside the dielectric substrate; a second electrode disposed near a surface of the dielectric so as to correspond the first electrode and having a sharp shape; and a power source applying a voltage between the first and second electrodes and plasmatizing part of the gas to generate an air current.

Air current generating apparatus and method for manufacturing same

In one embodiment, a wind-power generating systemincludes: a lightning protecting device including a receptorprovided on a blade surface and a lightning conductorgrounding the receptor; an airflow generating deviceprovided on the blade surface and including first and second electrodesseparated via a dielectric; a discharge power sourceincluding switchesable to connect the first and second electrodesto output terminalsrespectively and a switchable to connect the first or second electrodeto a grounding conductor; and a thundercloud detecting device detecting information regarding thundercloud approach. When the information regarding the thundercloud approach is detected, the second electrodeis connected to the grounding conductorand the first and second electrodesare disconnected from the output terminals

Wind power generation system

A refrigerator includes a deodorizer disposed in a cold air circulation path for deodorizing an atmosphere in the refrigerator. The deodorizer includes discharging means for producing ozone and ultraviolet rays by means of high-voltage discharge and a photocatalyst module for decomposing an odor component and injurious matter contained in the atmosphere by means of photocatalyst.

Refrigerator and deodorizer producing ozone by high-voltage discharge

A photocatalysis apparatus has at least one unit structure (). The unit structure has a photocatalyst module () and a pair of discharge electrodes () sandwiching the photocatalyst module. The photocatalyst module includes a photocatalyst and a three-dimensional ceramic mesh base carrying the photocatalyst. At least one of the discharge electrodes is a three-dimensional discharge electrode having an electrode body () and a conductive frame (). The electrode body consists of cells made of a conductive foil and has front, back, and side faces. The front and back faces are separated from each other by a predetermined distance and have a shape selected from a group including a honeycomb, a lattice, and a mesh. The side faces of the electrode body is covered with the conductive frame.

Growing community of inventors

Atsugi, Japan

Naohiko Shimura