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rotarX Slip Rings for Wind Turbines

The requirements placed on the design of slip rings face our engineers with great challenges in the areas of high precision and operational reliability, especially in the wind turbine sector. Within wind turbines, rotary transmissions are used for various applications: power transmission of the generator, power supply of the rotor blade pitch drives (Pitch Control Slip Rings), signal transmission of embedded strain gauges within the blades, lightning protection and, of course, further data transmission between all rotating systems.

Slip rings are used inside wind turbines for a wide variety of safety-relevant tasks that have a major impact on the availability and efficiency of the machines. rotarX slip rings are therefore specially designed for such applications and can offer corresponding differences, especially in terms of performance and quality. The wind power specific requirements in terms of shock and vibration, extreme temperature differences and as maintenance-free as possible are also fundamental elements of our design.


Innovative Rotary Joints for Wind Power

Demanding environmental conditions and the desire for a long service life of the slip rings lead to ever new solutions for the system manufacturers. Some examples are special seawater resistant housings, which are tested with extensive salt spray tests for their suitability for use in the offshore area, and special materials for rings and brushes, which guarantee the long-lasting and trouble-free operation of the systems with the help of a special gold wire technology.


Advantages of rotarX Slip Rings for Rotating Hubs

  • compact dimensions
  • heavy-duty construction
  • high availability and short service times
  • Operating temperatures from -40°C to +60°C
  • extremely long service life due to gold wire technology
  • modular design and flexible adaptation to different system types
  • easy installation


Modular design of slip rings for wind turbines

The requirements and the complexity of the slip rings vary greatly according to the different system types. While small wind turbines are equipped with less sensors and relatively low power rates have to be transmitted, the focus in this area is particularly on economical solutions with compact designs. In multi-megawatt systems, however, the requirements for power transmission and data transmission for the various BUS systems (Profibus, Profinet, CANopen, Ethernet 100 Base Tx) are significantly higher. For this reason, rotarX slip rings have a modular design and can be customized according to the type of system to ensure optimum integration.

Slip ring with Encoder

By combining slip rings and positioning technology, the turbine operator can be offered corresponding added value. The mounting of various rotary encoders on the slip rings allows not only the pure transmission of power or data but also the position detection of the rotating parts. For this purpose, our slip rings provide multifunctional mounting options for encoders, which can be equipped with the encoder types required depending on the type of system.

Integration of Slip Rings in Wind Turbine Generators

We also try to offer our customers a multitude of possibilities in the area of integration within the plants. Individual combinations of power and data lines, adaptation of flange dimensions and fixing holes, integration of connectors, integration of heating elements and individual cable types and cable lengths are just a few examples. Together with our customers, we use plug-and-play solutions to reduce the risk of errors during installation and thus ensure smooth installation.


New Slip Ring Technologies for Wind Turbines

Developments in terms of Industry 4.0 and the increasing integration of sensor technology within the systems also pose new challenges for manufacturers of slip rings. Especially data transmission within industrial networks is developing rapidly and through the use of passive optical rotary joints we can offer appropriate solutions. In addition to very high data rates, the maintenance-free use of fiber-optic rotary joints (FORJ) is also an advantage.


With its rotarX slip ring family, B-COMMAND offers a wide range of solutions for wind turbines. These also include slip rings with hollow shafts for electro-hydraulic pitch systems, which allow cables and hydraulic lines to pass through the free space inside.


The modular design of the slip rings and their adaptation to the systems are of primary importance to us. We would be happy to create an individual solution for your requirements. We look forward to talking to you.