Research Article

Vestas V90-3MW Wind Turbine Gearbox Health Assessment Using a Vibration-Based Condition Monitoring System

Table 5

Rotational frequencies for each stage.

Gear stageFrequency (orders)
Planet carrier/gearPlanetSun/pinion

Planetary stage I1x1.59x5.8x
Planetary stage II5.8x8.5x37.9x
Helical stage III37.9xā€‰104.5x