Bosch Rexroth & Hägglunds present offshore drive systems at OTC 2026

Bosch Rexroth and Hägglunds are presenting a range of offshore drive and subsea actuation technologies at the Offshore Technology Conference 2026, focusing on electrification, reliability, and system integration for offshore operations.

The portfolio includes direct drive motors, vane motors, and subsea electric actuators designed for applications from topside equipment to seabed infrastructure.

Electric direct drives for offshore equipment
A central technology is the Hägglunds Thunder motor, a permanent magnet synchronous torque motor designed to deliver high torque at low rotational speeds without the use of gearboxes. The system enables direct power transmission to shafts, reducing mechanical complexity and associated losses.

The motor supports variable speed control through frequency regulation and includes integrated overload protection. These characteristics are relevant for offshore equipment such as winches and cranes, where controlled torque and load handling are required under variable operating conditions.

Subsea actuation for valve control and infrastructure
The eSEA Push electric actuator is designed for subsea valve operation, particularly in existing installations where mechanical wear and maintenance requirements affect performance. The actuator integrates into existing control systems and provides forces up to 745 kN, with safety functionality aligned to SIL3 requirements.

For multiturn subsea applications, the eSEA Spin actuator delivers torque up to 2,700 Nm with low power consumption. The system integrates control electronics and sensors to enable precise positioning and monitoring of subsea valves under high-pressure conditions.

Hydraulic motor solutions for high-load applications
Rineer vane motors, based on a vane-crossing-vane design, are engineered to deliver consistent torque across the speed range, including at start and stall conditions. This enables stable operation in offshore applications such as bow thrusters, winches, and pump drives.

The design provides a high power-to-weight ratio and smooth output characteristics, supporting operation in environments with fluctuating loads and demanding mechanical conditions.

System monitoring and condition-based operation
In addition to hardware solutions, the portfolio includes digital monitoring approaches for subsea systems. Techniques such as valve signature analysis use embedded algorithms within actuator systems to assess valve condition over time.

This method enables condition monitoring without external sensors, supporting predictive maintenance strategies and reducing the need for manual inspection in subsea environments.

Application scope in offshore energy systems
The presented technologies address operational requirements in offshore oil, gas, and energy infrastructure, including reliability, efficiency, and maintainability. Electrification of drive systems and integration of smart control functions support reduced mechanical complexity and improved system diagnostics.

By combining electric drives, hydraulic systems, and digital monitoring, Bosch Rexroth provides a portfolio that supports both new installations and upgrades of existing offshore assets.

Edited by Natania Lyngdoh, Induportals Editor — Adapted by AI.

www.boschrexroth.com