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Electric pitch change control device and electric pitch change control system

A technology for control devices and drive controllers, applied in control systems, AC motor control, circuit devices, etc., can solve the problems of reduced reliability of electric pitch control systems, temporary interruption of power supply, etc., to reduce the number of circuit components, reduce The effect of small loss and current

Active Publication Date: 2011-07-13
SHANGHAI XINHUA CONTROL TECH GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the supercapacitor is an offline power supply, there is a switching time, resulting in a short interruption of the power supply, which reduces the reliability of the electric pitch system

Method used

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  • Electric pitch change control device and electric pitch change control system
  • Electric pitch change control device and electric pitch change control system
  • Electric pitch change control device and electric pitch change control system

Examples

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Embodiment Construction

[0026] Such as figure 1 As shown, block 1 is the electric pitch control device of the present invention. The device includes: a rectifier 2 for converting a first alternating current signal A1 with a voltage of 380 volts into a first direct current signal A2 with a voltage of 560 volts for charging a supercapacitor 3; a supercapacitor 3 for a backup power supply ; An inverter 4 is used to convert the second DC signal A3 with a voltage of 560 volts into a second AC signal A4 with a voltage of 220 volts; a drive controller 5 is used to drive the AC servo motor 7; a micro The processor 6 is used to control the operation of the rectifier 2, the inverter 4, and the drive controller 5, and realize the arithmetic operation and logic control of the electric pitch control device. The rectifier 2, the supercapacitor 3, the inverter 4, and the drive controller 5 are connected in sequence, and the microprocessor 6 is connected with the rectifier 2, the inverter 4, and the drive controlle...

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PUM

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Abstract

The invention discloses an electric pitch change control device which comprises a super capacitor, a drive controller, a current rectifier, an inverter and a microprocessor, wherein the current rectifier is used for converting an alternating current electrical signal into a direct current electrical signal and charging the super capacitor; the inverter is used for converting the direct current electrical signal into the alternating current electrical signal so as to drive the drive controller to run; the microprocessor is used for controlling the current rectifier, the inverter and the drive controller to run and realizing the arithmetic operation and logic control of the electric pitch change control device; the current rectifier, the super capacitor, the inverter and the drive controller are connected in sequence; and the microprocessor is connected with the current rectifier, the inverter and the drive controller. The electric pitch change control device disclosed by the invention realizes the undisturbed switching of a main power supply and a backup power supply by using the super capacitor as an online backup power supply without additionally arranging a charging device and a discharging device, thereby greatly improving the reliability of the electric pitch change system.

Description

technical field [0001] The invention relates to wind power generation equipment, in particular to an electric pitch control device and an electric pitch control system. Background technique [0002] Judging from the future development trend, variable pitch technology will be widely used in large-scale wind turbines. Pitch variable wind turbine means that the entire blade rotates around the central axis of the blade, so that the angle of attack of the blade changes within a certain range (generally 0°~90°), so as to adjust the output power not to exceed the design allowable value. With the continuous increase of the single unit capacity of the wind turbine, the variable pitch blades can improve the efficiency of capturing wind energy at the rated wind speed and obtain the best energy output. [0003] The electric pitch system uses an electric motor to drive the blades of the wind turbine to rotate. In the way of AC servo motor driving the blades, the electric pitch system g...

Claims

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Application Information

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IPC IPC(8): H02P27/06H02J9/06H02J15/00
Inventor 潘菊初李培植
Owner SHANGHAI XINHUA CONTROL TECH GROUP
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