Kabushiki Kaisha Toshiba

Shohei Goshima

Hisashi Matsuda

Motofumi Tanaka

Hiroyuki Yasui

Toshiki Osako

Naohiko Shimura

Kunihiko Wada

Tamon Ozaki

Susumu Kinoshita

Masahiro Asayama

Yutaka Ishiwata

Amane Majima

Shinichi Noda

Sueyoshi Mizuno

Toshimasa Yamada

Yutaka Uchida

A voltage application device of an embodiment applies a voltage between a first and second electrode disposed separately from each other in an airflow generation device, which is disposed on a rotation blade of a rotation apparatus, in which a rotation shaft of the rotation blade is held rotatably by a holding part. In the voltage application device of the embodiment, a voltage output unit outputs a voltage. Then, a sliding type transmission unit having electrodes disposed respectively on the rotation blade side and the holding part side of the rotation shaft transmits a voltage outputted from the voltage output unit from the holding part side to the rotation blade side. Then, a transformation unit disposed on the rotation blade side increases the voltage transmitted by the sliding type transmission unit and outputs the voltage to the airflow generation device.

Voltage application device, rotation apparatus and voltage application method

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, 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

Growing community of inventors

Yokohama, Japan

Shohei Goshima