FusionDrive 3-10

FusionDrive 3-10

The industry’s smallest and most light-weight gear and generator combination.

Moventas has combined its 100% proven gearbox with the medium-speed permanent magnet generator (PMG) of The Switch, a leading supplier of megawatt-class permanent magnet generator and full-power converter packages. The result is a solution that offers high availability, compact size and lowest weight: the FusionDrive®.

FusionDrive reduces CoE of wind power by 6%, offering 20-25% to grid parity thanks to its features, such as up-tower serviceability.

Minimize total life cycle cost & boost annual energy production

Annual energy production is a result of availability and efficiency. FusionDrive® is a reliable medium-speed solution. All high-speed components that are more prone to failure have been removed from the design and this leads to highest availability. PMG also enables greatest efficiency curves, and this makes a winning combination to boost annual energy production.

Unbelievably small size enables manageable transport and assembly and a shorter drive train. Scalable platform extends from 3 MW to offshore class – in onshore size. The integrated drivetrain’s size also simplifies the turbine's structural design and boasts lowest nacelle weight, improving total turbine cost competitiveness in the market.

High level of annual energy production and a minimum total life cycle cost is the formula for lowering the cost of energy!

Reliable medium speed technology – highest availability

The FusionDrive has no slip-rings and no rotor windings. It has low cogging torque and no bearing currents. Its medium speed bearings have  no smearing risk. Total amount of bearings is low, as no high speed bearings or generator bearings are needed. A common lubricant oil space provides controlled environment for force transferring rolling components. Gear stages and generator are perfectly aligned. No extra bearing forces or induced vibration appear. FusionDrive also has efficient air cooling system inside the generator.

Best serviceability in the market 

FusionDrive® requires minimal maintenance. Right from the beginning, FusionDrive® has been designed with easy serviceability in mind — FusionDrive can be completely maintained without an external crane. The gear and generator can be split, and all components are changeable in the nacelle. Small size, simplified turbine and great serviceability together bring down total lifecycle costs.

1. All main components can be disassembled and serviced up-tower.

2. Second planetary stage can be disassembled and serviced up-tower.

3. The generator can be disassembled and serviced up-tower.

Technical specifications below are for FusionDrive 3 and 7. Please note that the product is scalable to any power class, up to 10 MW.

Weight and total length are dependent on rated generator output power.

FusionDrive vs Other Drivetrains

3MW FusionDrive3 High Speed Hybrid    Direct Drive
Total Weight 35 t 40 t 40 t 75-85 t
Overall Length 3 m 6.5 m 5 m 2-2.5 m
Diameter 2.3 m 2.3 m 2.3 m 5.5-6.5 m
Min. Efficiency 0.96 0.96 0.96 0.94


7MW FusionDrive7 High Speed Hybrid Direct Drive
Total Weight 90 t 100-105 t 95-100 t 120-130 t
Overall Length 4 m 8 m 6 m 8-10 m
Diameter 2.8 2.8 2.3 5.5-6.5 m
Min. Efficiency 0.96 0.96 0.96 0.94

More peace of mind with service

No product is complete without a good service plan. Read more about Moventas service options.