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View article: Towards a Model-Based Methodology for Rating and Monitoring Wear Risk in Oscillating Grease-Lubricated Rolling Bearings
Towards a Model-Based Methodology for Rating and Monitoring Wear Risk in Oscillating Grease-Lubricated Rolling Bearings Open
Oscillating grease-lubricated slewing bearings are used in several applications. One of the most demanding and challenging is the rotor blade bearings of wind turbines. They allow the rotor blades to be turned to control the rotational spe…
View article: Comparative analysis of rolling contact fatigue life in a wind turbine pitch bearing with different modeling approaches
Comparative analysis of rolling contact fatigue life in a wind turbine pitch bearing with different modeling approaches Open
The load calculation for wind turbines usually does not take pitch bearings into account, and the pitch-bearing internal load distribution is calculated in a decoupled process. In the current study, a coupled wind turbine load simulation c…
View article: The effect of site-specific wind conditions and individual pitch control on wear of blade bearings
The effect of site-specific wind conditions and individual pitch control on wear of blade bearings Open
The characteristics of a pitch controller determine how the wind turbine reacts to different wind conditions. Control strategies like individual pitch control are known for their ability to reduce the amplitudes of load cycles of the struc…
View article: Reply on RC2
Reply on RC2 Open
Abstract. The characteristics of a pitch controller determine how the wind turbine reacts to different wind conditions. Control strategies like individual pitch control are known for their ability to reduce the amplitudes …
View article: Reply on RC1
Reply on RC1 Open
Abstract. The characteristics of a pitch controller determine how the wind turbine reacts to different wind conditions. Control strategies like individual pitch control are known for their ability to reduce the amplitudes …
View article: Comment on wes-2023-51
Comment on wes-2023-51 Open
Abstract. The characteristics of a pitch controller determine how the wind turbine reacts to different wind conditions. Control strategies like individual pitch control are known for their ability to reduce the amplitudes …
View article: The effect of site-specific wind conditions and individual pitch control on wear of blade bearings
The effect of site-specific wind conditions and individual pitch control on wear of blade bearings Open
The characteristics of a pitch controller determine how the wind turbine reacts to different wind conditions. Control strategies like individual pitch control are known for their ability to reduce the amplitudes of load cycles of the struc…
View article: Experimental Investigations on Wear in Oscillating Grease-Lubricated Rolling Element Bearings of Different Size and Type
Experimental Investigations on Wear in Oscillating Grease-Lubricated Rolling Element Bearings of Different Size and Type Open
Grease-lubricated rolling element bearings can suffer from wear due to lubricant starvation under certain oscillating operating conditions. Especially for large-scale slewing bearings, such as blade bearings in wind turbines, experimental …
View article: Wear Development in Oscillating Rolling Element Bearings
Wear Development in Oscillating Rolling Element Bearings Open
Rotor blade bearings enable rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to frequent o…
View article: Wear Development in Oscillating Rolling Element Bearings
Wear Development in Oscillating Rolling Element Bearings Open
Rotor blade bearings enable the rotor blades to pivot about their longitudinal axis and thus control the power output and reduce the loads acting on the wind turbine. Over a design period of 20 years, rolling bearings are exposed to freque…
View article: Measurements and modeling of friction torque of wind turbine blade bearings
Measurements and modeling of friction torque of wind turbine blade bearings Open
The friction torque of rotor blade bearings is a required parameter for the design of pitch actuators and may provide information about continued degradation and impending failure of the bearing. The torque is heavily influenced by the ope…
View article: Exploring the Causes of Power-Converter Failure in Wind Turbines based on Comprehensive Field-Data and Damage Analysis
Exploring the Causes of Power-Converter Failure in Wind Turbines based on Comprehensive Field-Data and Damage Analysis Open
Power converters are among the most frequently failing components of wind turbines. Despite their massive economic impact, the actual causes and mechanisms underlying these failures have remained in the dark for many years. In view of this…
View article: Reliability of Power Converters in Wind Turbines: Exploratory Analysis of Failure and Operating Data From a Worldwide Turbine Fleet
Reliability of Power Converters in Wind Turbines: Exploratory Analysis of Failure and Operating Data From a Worldwide Turbine Fleet Open
In view of the frequent and costly failures of power converters in wind turbines, a large consortium of research institutes and companies has joined forces to investigate the underlying causes and key driving factors of the failures. This …
View article: Solutions to reduce wear in wind turbine blade bearings
Solutions to reduce wear in wind turbine blade bearings Open
View article: Analysis of Dynamic Interactions between Different Drivetrain Components with a Detailed Wind Turbine Model
Analysis of Dynamic Interactions between Different Drivetrain Components with a Detailed Wind Turbine Model Open
The presented work describes a detailed analysis of the dynamic interactions among mechanical and electrical drivetrain components of a modern wind turbine under the influence of parameter variations, different control mechanisms and trans…
View article: Converter Lifetime Assessment for Doubly-Fed Induction Generators Considering Derating Control Strategies at Low Rotor Frequencies
Converter Lifetime Assessment for Doubly-Fed Induction Generators Considering Derating Control Strategies at Low Rotor Frequencies Open
In this paper, various control strategies around the synchronous operating point with the aim to reduce the thermal loading of the rotor-side converter in wind turbines equipped with doubly-fed induction generators are investigated regardi…