Hybrid Damping Module for Wind Turbine Demagnetization Control
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Solution Overview
Problem
Wind turbines experience vibration due to complex and variable external and internal excitation sources, leading to instability and potential shutdown, resulting in power generation loss.
Innovation Solution
A hybrid damping module combining a permanent magnet eddy current damper and a tuned liquid damper, with a circulation loop for cooling, dynamically adjusts flow rate based on temperature to maintain damping force and prevent demagnetization, integrated with a vibration suppression device and method for wind turbines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a permanent magnet eddy current damper is used to suppress vibration, then damping force is generated, but temperature rise causes demagnetization and damping force attenuation
Solution Approach 1:
The patent combines a permanent magnet eddy current damper (first damping unit) with a tuned liquid damper (second damping unit) into a hybrid damping module. The liquid damper serves dual purposes: it provides additional vibration suppression and acts as a cooling medium for the permanent magnet damper, thereby resolving the contradiction between generating damping force and preventing temperature-induced demagnetization
Solution Approach 2:
The damping liquid in the second damping unit serves as an intermediary cooling medium that transfers heat from the first damping unit. The circulation system moves the liquid between the two damping units, enabling thermal management without requiring external cooling equipment, thus maintaining damping force while controlling temperature
2Temperature
If additional cooling equipment is provided for the permanent magnet eddy current damping device, then temperature control is improved, but device complexity and cost increase
Solution Approach 1:
The second damping unit performs multiple functions simultaneously: it provides vibration suppression through liquid motion and serves as a cooling system for the first damping unit. This multi-functionality eliminates the need for separate cooling equipment, reducing device complexity and cost while maintaining effective temperature control
Solution Approach 2:
The hybrid damping module is self-cooling through the circulation of damping liquid between the two damping units. The system uses its own operational components (the liquid damper and circulation pump) to provide cooling, without requiring external cooling infrastructure, thereby simplifying the overall system
3Temperature
If the flow rate of damping liquid is increased to improve cooling, then temperature control improves, but energy consumption increases
Solution Approach 1:
The circulation pump operates dynamically, adjusting the flow rate of damping liquid based on the temperature conditions of the first damping unit. The system increases flow rate when cooling demand is high and reduces it when cooling demand is low, optimizing the balance between cooling efficiency and energy consumption
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 hybrid damping module effectively suppresses wind turbine vibrations, ensuring continuous operation, reducing power loss, and avoiding demagnetization and damping force attenuation, while optimizing the performance of both damper types and reducing cooling system complexity and cost.
Implementation Method 1
the rotor portion is configured to be rotatable relative to the stator portion to generate electromagnetic damping
Implementation Method 2
a liquid in the liquid damper is configured to circulate in the circulation loop
Implementation Method 3
the rotor portion is configured to be rotatable relative to the stator portion to generate electromagnetic damping
Implementation Method 4
the vibration suppression effect of the hybrid damping module is improved by the combination use of the first damping unit and the second damping unit
Data Source
AI summary
A hybrid damping module, a vibration suppression device, a vibration suppression method and a wind turbine are provided. The hybrid damping module includes a first damping unit and second damping unit. The first damping unit includes a rotor portion and a stator portion provided parallel to the rotor portion. The rotor portion is configured to rotate relative to the stator portion so as to generate electromagnetic damping. A flow passage is formed in at least one of the rotor portion and the stator portion. The second damping unit includes a liquid damper. The liquid damper communicates with the flow passage and forms a circulation loop, and a liquid in the liquid damper can cyclically flow in the circulation loop.