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Alternating current variable pitch control system

A control system, three-phase AC technology, applied in the control of wind turbines, sustainable buildings, engines, etc., can solve the problems of high fan speed, blade damage, fan collapse, etc., and achieve the effect of ensuring safety

Inactive Publication Date: 2012-12-19
SUZHOU NENGJIAN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can cause the fan to spin too high, creating a risk of the fan collapsing or damage to the blades
This is a great safety hazard for the entire wind turbine

Method used

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  • Alternating current variable pitch control system

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Embodiment Construction

[0008] An AC pitch control system such as figure 1 As shown, it includes a driver 1A1, the driver 1A1 is provided with three output terminals A1, A2, A3, and the three output terminals A1, A2, A3 are connected to a three-phase AC motor 12, and the three main drives of the driver 1A1 The power supply input terminals L1, L2, L3 are connected to the power grid through the output terminals of the first contactor 1K1, the first contactor 1K1 is connected in parallel with the second contactor 1K2, and the three output terminals of the first contactor 1K1 are respectively connected to The input terminals of the three resistors 1R1, 1R2, and 1R3 are connected, and the output terminals of the resistors 1R1, 1R2, and 1R3 are connected to the output terminal of the second contactor 1K2 and then connected to the input terminal UD of the main power supply of the driver. The system also includes a backup battery 11, The backup battery 11 is connected to the battery input terminal UD of the ...

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PUM

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Abstract

The invention discloses a safe and stable alternating current variable pitch control system, comprising a driver. An output end of the driver is connected with a three-phase alternating current motor, a main power supply input end of the driver is connected with a power grid through an output end of a first contactor, the first contactor and a second contactor are connected in parallel, the output end of the first contactor is connected with an input end of a resister, after being connected with an output end of the second contactor, an output end of the resistor is connected with an input end of the driver main power supply. The system further comprises a backup battery which is connected with the input end of the driver. By the adoption of the system, emergency pitch control is realized through the backup power after the power grid is powered off, and the safety of the alternating current variable pitch system is ensured.

Description

technical field [0001] The invention relates to an AC pitch control system, which is applied in the technical field of wind power. Background technique [0002] At present, in the AC pitch control system, power is supplied to the driver through the power grid, and the AC motor is directly driven to run. When the power grid is powered off, the propeller cannot be retracted urgently, so that the blades are in a safe position. This can cause the fan to spin too high, creating a risk of the fan collapsing or damaging the blades. This poses a great potential safety hazard to the entire wind turbine. Contents of the invention [0003] In order to solve this technical problem, the present invention proposes an AC pitch control system. [0004] The purpose of the present invention will be achieved through the following technical solutions: [0005] An AC pitch control system, including a driver, the output end of the driver is connected to a three-phase AC motor, the main pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00H02J9/04H02J7/00
CPCY02E10/723Y02E10/766Y02B10/70Y02E10/72Y02E10/76
Inventor 杨再名傅建民
Owner SUZHOU NENGJIAN ELECTRIC