WINDMILL PITCH CONTROL DEVICE

Title:

WINDMILL PITCH CONTROL DEVICE

Document Type and Number:

WIPO Patent Application WO/2012/002265

Kind Code:

A1

Abstract:

Provided is a windmill pitch control device capable of performing feathering and also continuously generating power even if an ordinary power source loses the ability to supply power. A pitch controller (50) transmits a control signal for pitch control which controls the charging and discharging of an accumulator (12) and also alters the pitch angle of a blade (104), and a motor controller (13) controls an electric motor (11) in accordance with the control signal from the pitch controller (50). An accumulator operation monitoring section (15) monitors the operation state of the accumulator (12). The motor controller (13) supplies power by being connected to an ordinary power source (111), and if the ordinary power source (111) loses the ability to supply power, the motor controller (13) uses power supplied from the accumulator (12) to control the electric motor (11) in accordance with the control signal and thereby continues pitch control. Control which alters the pitch angle of the blade (104) in the direction in which wind pressure decreases is performed in accordance with the monitoring result of the accumulator operation monitoring section (15).

Inventors:

HIBINO TOSHIHARU (JP)
KODAMA HARUO (JP)

Application Number:

PCT/JP2011/064510

Publication Date:

January 05, 2012

Filing Date:

June 24, 2011

Export Citation:

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Assignee:

NABTESCO CORP (JP)
HIBINO TOSHIHARU (JP)
KODAMA HARUO (JP)

International Classes:

F03D7/04; F03D9/02

Domestic Patent References:

WO2004067958A1

2004-08-12

Foreign References:

JP2008075521A	2008-04-03
JP2005023867A	2005-01-27
JP2003222070A	2003-08-08

Other References: