| 摘要 |
<p>The condition and rate of wear of brushes in a wind turbine slip ring assembly is monitored and controlled by deriving a wear index from measurements of rotor rotational speed and current over time. The index value may be used to schedule maintenance and may be used to control ambient conditions around slip ring brushes such as pressure, temperature and humidity to prolong brush life. Control of ambient conditions may for example comprise varying the speed of a fan controlling airflow through the slip-ring housing.</p> |
