Moventas Exceeds High Torque Density with 3-MW Gearbox

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The Exceed is a 3-MW, up-product platform with a high-quality weight and nominal torque ratio. The Exceed provides 20-percent more torque density with 10-percent less size and consists of 100-percent proven Moventas technology. Testing and verification showed that torque density improvement was even more significant than expected, exceeding 140 Nm/kg.

“We took measured gearbox values of the technology we’ve been using for a decade and recalculated them with new design methods,” said Moventas’ CTO Jyrki Virtanen. “As a result, one gets more torque out of a smaller, more lightweight gearbox. This positively affects the levelized cost of wind energy.”

In addition to the superior torque density, the Exceed’s other major improvements contributing to turbine competitiveness include lower weight, smaller size, and best-in-class noise and vibration behavior. Compared to a conventional Moventas 3-MW gearbox, the Exceed is nearly 4.5 tons lighter, weighing less than 20 tons. Despite the lighter weight, no quality compromises have been made.

The Exceed’s overall noise levels are quieter on both partial and nominal powers. Its maximum vibration level is half the level of a conventional 3-MW gearbox. In addition to the increased performance, tests also showed improved reliability.

Supervised by a classification body, Moventas finished the successful prototype verification process two weeks ago. Serial deliveries of the Exceed will begin in Q1/2016 for two OEM customers from Moventas’ highly modern MMW wind gearbox factory in Finland. 

— Source: Moventas