Method and device for controlling dual-motor variable-pitch system

A technology of pitch control system and control method, which is applied in the control of wind turbines, engine control, multiple motor speed adjustments, etc., and can solve problems such as difficulties in maintenance and replacement, large parts with high mass, and limited volume of hubs

Inactive Publication Date: 2019-09-27
XUCHANG XUJI WIND POWER TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most domestic wind turbines use a control system that drives a single motor. However, with the application of high-power units, the blades will inevitably be lengthened and the load will increase, resulting in excessive volume of motors, reduce

Method used

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  • Method and device for controlling dual-motor variable-pitch system
  • Method and device for controlling dual-motor variable-pitch system
  • Method and device for controlling dual-motor variable-pitch system

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Experimental program
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Effect test

Embodiment 1

[0024] This embodiment provides a control method for a dual-motor pitch system. In order to realize this method, the following methods are used: figure 1 The two-motor pitch system shown. The system includes a master driver and a slave driver, which respectively control the master motor M1 and the slave motor M2, and the data exchange between the master motor and the master control system is carried out through the CAN bus. Both the master driver and the slave driver here include a processor and a motor controller, which can not only process signals, but also control the motor.

[0025] The main driver receives the target position of the blade (that is, the angle of the blade) issued by the main control system, and compares the current position of the currently recorded blade with the received target position of the blade to obtain the target speed of the motor. The speed includes not only the speed of the motor, but also the direction in which the motor needs to rotate. Afte...

Embodiment 2

[0039] This embodiment provides a control method of a dual-motor pitch system, in order to realize this method adopts such as figure 1 system shown. However, the difference between the system of this embodiment and Embodiment 1 is that the functions realized by the master driver and the slave driver are different.

[0040] The master driver in this embodiment includes a processor and a motor controller, and the slave driver includes a motor controller, and the PWM signal sent by the master driver to the slave driver is no longer a square wave frequency signal about the target torque of the slave motor , but to control the control signal from the switching tube of the motor controller in the driver.

[0041] The main driver receives the target position of the blade issued by the main control system, and compares the current position of the recorded blade with the received target position of the blade to obtain the target speed of the motor. The target speed of the motor includ...

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Abstract

The invention relates to a method and device for controlling a dual-motor variable-pitch system. The method comprises the steps that firstly, the current position of a paddle and the target position of the paddle are acquired, and a motor target rotating speed is calculated according to the difference value of the current position and the target position of the paddle; motor target torque is obtained according to the motor target rotating speed; then the motor target torque is distributed to a master motor and a slave motor, and master motor target torque current and slave motor target torque current are obtained; the master motor is controlled through the master motor target torque current, and the slave motor is controlled through the slave motor target torque current. According to the method, the master motor and the slave motor are controlled separately, one part of the motor target torque is output by the master motor, the other part of the motor target torque is output by the slave motor, coordination control over the master motor and the slave motor is achieved, and it is guaranteed that the paddle can reach the target position.

Description

technical field [0001] The invention belongs to the technical field of wind turbines, and in particular relates to a control method and device for a dual-motor pitch control system. Background technique [0002] As an important part of the wind turbine, the pitch system is used to receive commands from the main control system, control the blades to rotate to a set angle, and then control the speed of the wind rotor to realize the control of the output power of the wind turbine. When it is used as the pneumatic brake of the fan in an emergency, the blades are controlled to retract quickly, and the fan is stopped safely through aerodynamic braking to achieve the purpose of protecting the safety of the unit. [0003] At present, most domestic wind turbines use a control system that drives a single motor. However, with the application of high-power units, the blades will inevitably be lengthened and the load will increase, resulting in excessive volume of motors, reducers, contr...

Claims

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Application Information

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IPC IPC(8): F03D7/00H02P5/46
CPCF03D7/00F05B2270/602H02P5/46Y02E10/72
Inventor 王海明高亚春费怀胜赵瑞杰王旭昊刘德林代兴华
Owner XUCHANG XUJI WIND POWER TECH
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