Variable pitch system of wind generating set

A pitch system, wind power technology, applied in wind power generation, electrical installations, wind turbines, etc., to achieve the effect of reducing the cost of use

Inactive Publication Date: 2013-04-24
SUZHOU NENGJIAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the B encoder is also an absolute encoder, it is more expensive, and there is also the possibility of damage, and the angle deviation of the two encoders does not need to be set very small, so as long as the angle can be approximately measured, other low-cost encoders can be used. Angle measuring device instead of B encoder

Method used

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  • Variable pitch system of wind generating set
  • Variable pitch system of wind generating set
  • Variable pitch system of wind generating set

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0016] A kind of wind power pitch system of this embodiment, such as figure 1 As shown, it includes 1 to 3 paddles, and the paddles are respectively connected to the hub 1; the hub 1 includes the inner gear ring 2 of the hub, and the A encoder is installed in the hub 1, and the A encoder is connected to the main control. Proximity switch 3 is arranged, and proximity switch 3 faces the internal tooth surface of hub ring gear 2; Proximity switch 1 is connected with main control. The A encoder is an absolute encoder. The proximity switch 3 is a Hall proximity switch or a photoelectric proximity switch, which utilizes the Hall effect or the photoelectric effect to realize non-contact identification of the existence of an object, and then controls the on or off of the switch.

[0017] When the hub 1 rotates, each tooth on the inner ring gear 2 of the hub passes through the proximity switch 3, which will cause the proximity switch 3 to be opened and closed once, that is, a pulse is...

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PUM

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Abstract

The invention discloses a variable pitch system of a wind generating set. The variable pitch system of the wind generating set comprises at least one paddle, paddles are respectively connected with a hub, the hub comprises a hub internal gear, an A encoder is arranged in the hub, the A encoder is connected with a master control, an approach switch is further arranged in the hub, the approach switch is rightly opposite to the inner gear face of the hub internal gear, and the approach switch is connected with the master control. Due to the fact that a B encoder used in the prior art is replaced by the approach switch in the variable pitch system of the wind generating set, redundancy function of encoders can also be achieved, and meanwhile cost is reduced.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to a wind power pitch control system. Background technique [0002] At present, two encoders, A and B, are installed in the wind power pitch system. The A encoder includes the absolute value position output and the motor speed output; the B encoder is installed on the hub and only has the absolute value position output. Its function is to Do security redundancy. When the absolute value position deviation of the two encoders is too large, the pitch system retracts to protect the fan, preventing the encoder from jumping or the encoder from continuing to operate after the encoder is damaged. Because the B encoder is also an absolute encoder, it is more expensive, and there is also the possibility of damage, and the angle deviation of the two encoders does not need to be set very small, so as long as the angle can be approximately measured, other low-cost encoders can be used. Ang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00G01B7/30
CPCY02E10/723Y02E10/72
Inventor 傅建民林盈杰
Owner SUZHOU NENGJIAN ELECTRIC
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