Advanced Gearbox and Motor Systems for Wind Turbine Control

Bonfiglioli is releasing a new portfolio of fully integrated pitch and yaw drive solutions designed to control energy generation and rotor positioning in utility-scale offshore wind applications. These electromechanical systems address the operational requirements of wind turbine manufacturers by managing severe aerodynamic loads on nacelles and rotor blades.

Integrated Yaw Drive Mechanisms for High-Capacity Turbines
At the WindEnergy trade fair in Hamburg (September 22–25, 2026), several complete drive configurations were exhibited for technical review. The primary yaw drive solution integrates a sensorized 716T4W planetary gear unit, a BE asynchronous three-phase motor, and an onboard DGM modular inverter. Engineered to provide high torque density, this system generates a peak torque of 225,000 Nm, allowing it to govern nacelle orientation on offshore turbines rated up to 21 megawatts. A secondary yaw drive system incorporates the fourth-generation 700TW series gearbox coupled with a BWM permanent magnet motor and an AxiaVert inverter, reducing the overall installation footprint while maintaining high mechanical output.

Pitch Control Servomotors and Synchronous Reluctance Technology
For precise rotor blade positioning, the 54 kW BMD Series permanent magnet servomotor was specified for offshore turbines up to 18 megawatts. This synchronous motor manages steep speed and position profiles by delivering high overload torque at zero speed combined with low mechanical inertia. Additionally, reluctance motor technology has been added to the product lineup to balance electrical efficiency with hardware costs. By functioning without permanent magnets, reluctance motors reduce the wind energy supply chain vulnerability regarding rare-earth metal shortages, securing a more stable production pipeline.




Diagnostic Sensors and Localized Manufacturing Standards
To support ongoing lifecycle maintenance, the VF Series yaw drive incorporates integrated W and Z sensors alongside mechanical torque limiters. These hardware additions enable advanced condition monitoring and prevent mechanical overloads during grid or wind anomalies. Production for these drive systems is distributed across facilities in Europe, India, Brazil, China, Vietnam, and Turkey to comply with regional supply chain requirements. The manufacturing framework operates under the APQP4Wind 2026 quality certification, a standardized quality metric utilized across the global wind sector.

Additional Context
This section details technical specifications and competitive benchmarking not included in the original news release.

In the utility-scale wind turbine sector, manufacturers require yaw and pitch drives capable of sustaining immense radial and axial loads. Bonfiglioli’s 700TW series and 716T4W units, capable of 225,000 Nm peak torque, compete directly with heavy-duty yaw drives produced by Liebherr (such as the DAT series) and Dana Brevini. While competitors traditionally rely on multi-stage planetary gears paired with standard induction or permanent magnet motors, Bonfiglioli’s introduction of synchronous reluctance motors represents a distinct divergence in electromagnetic architecture. This design choice provides a measurable advantage in component sourcing by removing reliance on neodymium and dysprosium—materials susceptible to geopolitical supply constraints—while maintaining the torque density required for multi-megawatt nacelle alignment.

Edited by Aishwarya Mambet, Induportals Editor, with AI assistance.

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