Wind Turbine Bearing Interface Filtering for High-Frequency Signal Damage
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Solution Overview
Problem
High-frequency electrical signals in wind turbines can cause damage to bearings, reducing the lifetime of the wind turbine components and the entire system.
Innovation Solution
A system for a wind turbine is designed with a filter element coupled to the electrical connection between rotating components to attenuate high-frequency signals, using materials like ferrite or soft magnetic materials to reduce signal amplitude or completely suppress these signals, thereby protecting the bearings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-frequency electrical signals are allowed to flow through the electrical connection, then power supply functionality is maintained, but bearing damage occurs and lifetime is reduced
Solution Approach 1:
A filter element is introduced as an intermediary component in the electrical connection between the stationary and rotating parts. This filter element selectively attenuates high-frequency electrical signals while allowing the main power supply current to pass through, thereby preventing bearing damage without compromising power supply functionality.
Solution Approach 2:
The filter element changes the frequency parameter of the electrical signals by attenuating high-frequency components. This parameter modification allows the system to maintain the necessary power supply current while removing the harmful high-frequency signals that cause bearing damage.
2Reliability
If a filter element is added to the electrical connection, then bearing protection is improved, but device complexity increases
Solution Approach 1:
The filter element is designed as a simple, cost-effective component that can be easily integrated into the electrical connection. Rather than implementing complex active filtering systems, a passive filter element is used that provides sufficient protection while maintaining system simplicity and low cost.
3Reliability
If high-frequency signals are attenuated, then bearing damage is prevented, but signal transmission capability is reduced
Solution Approach 1:
The filter element is positioned locally at the electrical connection point between stationary and rotating parts, where it selectively attenuates high-frequency signals. The filtering action is localized to this specific position, allowing the rest of the electrical system to operate normally without signal loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The filter element effectively reduces high-frequency signal damage to bearings, thereby increasing the lifetime of the wind turbine components and the overall system.
Implementation Method 1
The filter element is configured to at least partially attenuate high-frequency electrical signals in the electrical connection
Implementation Method 2
using materials like ferrite or soft magnetic materials to reduce signal amplitude or completely suppress these signals
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
According to an embodiment, the system (50) for a wind turbine (100) comprises a first component (1) and a second (2) component. The first component and the second component are arranged rotatable relative to each other with the help of a bearing (3). The system further comprises a first electrical device (10) coupled to the first component and a second electrical device (20) coupled to the second component. Moreover, the system comprises an electrical connection (12) between the first electrical device and the second electrical device as well as a filter element (40, 41) coupled to the electrical connection. The filter element is configured to at least partially attenuate high-frequency electrical signals in the electrical connection.