Wind Turbine Pitch Drive Zero Point Backup and Recovery
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Solution Overview
Problem
The maintenance of wind turbine pitch drive systems is complex and time-consuming, requiring multiple professionals to reset the blade zero position, which is inefficient and labor-intensive.
Innovation Solution
A pitch drive system for wind turbines comprising a pitch drive motor, first and second position detectors, and a controller, which allows for the backup and recovery of blade zero points through a communication bus, enabling the transfer of positional values between components, simplifying the process and reducing the need for multiple professionals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation box is used to rotate blade to mechanical zero position, then zero position can be recorded, but the operation requires multiple professionals and is time-consuming
Solution Approach 1:
The system performs preliminary actions by automatically detecting and recording the blade's mechanical zero position using position detectors before any component replacement occurs. The controller stores this zero position information in memory, so when components fail and need replacement, the system can quickly recover the stored zero position data without requiring time-consuming manual rotation and measurement operations.
Solution Approach 2:
The patent replaces the manual mechanical operation of rotating the blade with a manual operation box with an automated electronic detection system. Position detectors automatically sense the blade's angular position, and the controller electronically processes this data to identify and store the mechanical zero position, eliminating the need for manual mechanical manipulation by multiple workers.
2Manufacturing precision
If manual operation box is used to rotate blade to mechanical zero position, then zero position can be recorded, but the operation is complex and requires specialist cooperation
Solution Approach 1:
The patent replaces the complex manual mechanical operation system with an automated electronic detection and control system. Position detectors using optical or magnetic fields automatically measure the blade's angular position with high precision, and the controller electronically calculates and stores the zero position data, eliminating the need for complex manual procedures involving multiple specialists.
Solution Approach 2:
The system performs self-service by automatically detecting, calculating, and recording the blade's mechanical zero position without requiring human intervention for the actual measurement process. The controller autonomously processes the position data from the detectors and stores it in memory, making the system self-sufficient for zero position recording.
3Ease of repair
If position detectors and controller are used to detect and store zero point positional values, then backup and recovery is simplified, but the system structure becomes more complex
Solution Approach 1:
The system performs preliminary action by continuously monitoring the blade position and automatically capturing the mechanical zero position data when the blade is at that position. This pre-captured data is stored in the controller's memory and can be immediately retrieved and transferred to replacement components, greatly simplifying the repair process despite the added electronic systems.
Solution Approach 2:
The system creates electronic copies of the blade's zero position data by detecting the position with position detectors and storing digital representations in the controller's memory. These digital copies can be quickly copied and transferred to replacement components through communication interfaces, making component replacement straightforward despite the more complex system architecture.
Data Source
AI summary
A pitch drive system for a wind turbine includes a pitch drive motor, a first position detector, a driver, a second position detector, and a controller. When the blades rotate to a mechanical zero position, a position value detected by the first position detector is a first zero point position value. The driver is operable to store the first zero point position value. When the blades rotate to the mechanical zero position, a position value detected by the second position detector is a second zero point position value. The controller is operable to store the second zero point position value. When a corresponding back up command is received, the first zero point position value stored in the driver is backed up into the controller, and the second zero point position value stored in the controller is backed up into the driver respectively.