Low-pressure variable pitch system with variable pitch servo driver with integrated PLC function

Abstract

The invention relates to the technical field of wind-power electromechanical control equipment, in particular to a low-pressure variable pitch system with a variable pitch servo driver with the integrated PLC function. The low-pressure variable pitch system comprises the variable pitch servo driver with the PLC control function. The variable pitch servo driver comprises four circuit boards, a heat-dissipation cold plate, a conductive copper column terminal and a plastic shell, wherein the four circuit boards are a power board, a power driving board, a servo control board and a PLC control board; the power board is fixed on the heat-dissipation cold plate, and the power driving board is fixed above the power board through a board to board terminal and a copper column; the servo control board and the PLC control board are connected with the power driving board through signal cables and are fixed on the plastic shell. The low-pressure variable pitch system greatly saves the inner space of a variable pitch cabinet and is convenient to design a variable pitch cabinet body.

Description

technical field [0001] The invention belongs to the technical field of wind energy electromechanical control equipment, and in particular relates to a low-voltage pitch-variable system with a pitch-variable servo drive integrated with PLC functions. Background technique [0002] The complete set of electronic control for wind power generation is mainly composed of main control system, converter and pitch system. The main function of the pitch control system is to adjust the angle of the fan blades according to the command of the main control; when the system fails, the fan blades will receive a safe position. The blades of the fan are driven by the pitch servo drive to control the angle of the blades. In the existing low-pressure pitch system, the pitch servo drive is responsible for the adjustment of the blade speed, that is, it only has a speed control loop, and the speed command comes from the PLC controller of the pitch system. The PLC controller is responsible for the...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the above-mentioned technical problems, the present invention integrates the pitch servo driver, PLC control module, analog signal module and digital signal module in the existing pitch system into a pitch servo driver with PLC control function, and applies it In the low-voltage pitch system, it solves the shortcomings of the existing low-voltage pitch system, such as long communication lines, easy to be interfered, numerous cables, difficult production process, large space occupation, difficult structural design of the pitch cabinet, and high cost.

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