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Windmill pitch control device

A pitch control and windmill technology, which is applied in the control of wind turbines, engine control, and control system uses, etc., can solve the problems of unable to continue generating electricity and unable to control the pitch.

Inactive Publication Date: 2013-05-01
NABLESCO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in this pitch control device for a windmill, there is a problem that when the power supply capability of the normal power source is lost, the pitch control required for power generation cannot be performed, and therefore power generation cannot be continued.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0032] figure 1 It is a perspective view showing a wind turbine 100 to which the pitch control device 1 for a wind turbine (hereinafter simply referred to as "pitch control device 1") according to the first embodiment of the present invention is applied. Such as figure 1 As shown, the wind turbine 100 includes a tower 101, a nacelle 102, a hub (main shaft portion) 103, blades 104, and the like. The tower 101 is installed so as to extend vertically upward from the ground. The nacelle 102 is rotatably arranged on the tower 101 and installed so as to rotate in the horizontal plane by a yaw drive device not shown. Inside the nacelle 102, a power transmission shaft, a generator, and the like, not shown, are disposed. Moreover, the hub 103 which comprises the main shaft part of this embodiment is connected with the said power transmission shaft, and is provided in the nacelle 102 so that rotation is possible. Furthermore, a plurality of (three in this embodiment) blades 104 (1...

no. 2 approach

[0067] Next, a second embodiment of the present invention will be described. Figure 5 It is a block diagram showing a pitch control device 2 for a wind turbine (hereinafter simply referred to as "pitch control device 2") according to the second embodiment. Similar to the pitch control device 1 of the first embodiment, Figure 5 The pitch control device 2 shown can be applied to a windmill 100 . Furthermore, the pitch control device 2 is configured in the same manner as the first embodiment, and is configured to include the same components as the pitch control device 1 . However, the pitch control device 2 differs from the first embodiment in that it is further provided with a switch 25 for a normal power supply and in that it is configured to send a signal from the encoder 14 serving as a pitch angle detector to the motor controller 13. The pitch control device 1 is different. In addition, in the following description, for the same structure as that of the first embodiment...

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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).

Description

technical field [0001] The present invention relates to a pitch control device for a windmill. The pitch control device for a windmill has an accumulator capable of applying electric power to an electric motor connected to a pitch drive device, and the pitch angle of the blades can be controlled by using the electric power of the accumulator. The pitch angle of the blades is changed in a direction such that the wind pressure received by the blades decreases. The pitch drive device changes the pitch angles of the blades of the wind turbine rotatably provided on the main shaft of the wind turbine. Background technique [0002] A windmill is provided with a pitch control device for a windmill that controls a pitch angle of blades rotatably provided on a main shaft portion of the windmill. As such a pitch control device for a windmill, there is known a device having a battery as an accumulator capable of supplying electric power to an electric motor connected to a pitch driving ...

Claims

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Application Information

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IPC IPC(8): F03D7/04F03D9/02
CPCF03D9/02Y02E10/723F05B2270/602Y02E10/72F05B2260/42F03D7/0224F03D7/04F03D7/0284F05B2260/76F05B2270/107F05B2270/1074
Inventor 日比野敏晴儿玉晴夫
Owner NABLESCO CORP
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