Airflow generation device and wind power generation system

Patent metadata

Field	Value
Publication number	US-10138871-B2
Application number	US-201514885277-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Nov 6, 2014
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

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.

First claim

What is claimed is:

1. An airflow generation device, comprising:
a main body having a base formed of a dielectric, a first electrode and a second electrode, the first electrode and the second electrode being provided inside the base, the main body being disposed on a rotary body;
a rotation speed detecting unit for detecting a rotation speed of the rotary body; and
a voltage application unit for generating 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,
wherein the voltage application unit and the rotation speed detecting unit are disposed inside the rotary body.

2. The airflow generation device according to claim 1 ,
wherein the rotation speed detecting unit has an acceleration sensor.

3. The airflow generation device according to claim 1 ,
wherein the voltage application unit applies a pulse-modulated voltage modulated by a pulse modulation frequency set in accordance with the rotation speed detected by the rotation speed detecting unit, between the first electrode and the second electrode.

4. The airflow generation device according to claim 1 ,
wherein:
the rotary body has windmill blade; and
the windmill blade is provided with each of the main body, the rotation speed detecting unit, and the voltage application unit.

5. The airflow generation device according to claim 1 ,
wherein the rotation speed detecting unit is disposed inside a casing which forms the voltage application unit.

6. The airflow generation device according to claim 1 ,
wherein signals are given and received between the rotation speed detecting unit and the voltage application unit by wireless.

7. A wind power generation system, comprising
a rotary body to which windmill blade is disposed, and airflow generation device configured to generate an airflow at a surface of the windmill blade,
wherein the airflow generation device has:
a main body having a base formed of an insulating material, a first electrode and a second electrode, the first electrode and the second electrode being provided inside the base, the main body being disposed on a surface of the windmill blade;
a rotation speed detecting unit configured to detect a rotation speed of the rotary body; and
a voltage application unit configured to generate 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,

wherein the voltage application unit and the rotation speed detecting unit are disposed inside the rotary body.

8. The airflow generation device according to claim 2 ,
wherein the voltage application unit applies a pulse-modulated voltage modulated by a pulse modulation frequency set in accordance with the rotation speed detected by the rotation speed detecting unit, between the first electrode and the second electrode.

Assignees

• Toshiba Kk

Inventors

• Shimura Naohiko
• Tanaka Motofumi
• Osako Toshiki
• Hanafusa Tadayoshi

Classifications

• F05B2260/96

  Preventing, counteracting or reducing vibration or noise · CPC title

• F03D1/0675

  of the blades · CPC title

• F03D7/042

  by means of an electrical or electronic controller · CPC title

• F03D17/00

  Monitoring or testing of wind motors, e.g. diagnostics (testing during commissioning of wind motors F03D13/30) · CPC title

• F03D7/0296

  to prevent, counteract or reduce noise emissions · CPC title