Direct Drive Segments: stator segments for direct drive wind turbine generators of 3–20 MW
Stator segments for gearless multipole synchronous generators of direct drive wind turbines. The stator is assembled from pre-assembled subsegments, and generator power is scaled by the number of segments from 3 to 20 MW. The segments are made to order for turbine manufacturers for onshore and especially offshore wind turbines.
- Purpose
- stator of a gearless multipole synchronous wind turbine generator (usually with permanent magnets)
- Generator power
- scaled by segmentation, 3–20 MW
- Cooling
- air
- Design
- stator made of pre-assembled subsegments, finite element calculation
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
A direct drive generator is built as a multipole synchronous machine, as a rule with permanent magnets. Its rotor turns directly at the speed of the rotor blades, and there is no gearbox in the drivetrain. Together with the gearbox, the wear and lubrication components associated with it disappear, which is especially noticeable where access to the turbine is difficult, such as at sea. The price is a large machine diameter, and this is where the segmented stator design removes part of the problems.
The stator of such a machine is not made in one piece. The modular platform provides for assembly from pre-assembled subsegments, and this simplifies transport and installation of a large generator. The same approach allows the machine to be adapted to the required power, and the range from 3 to 20 MW is obtained by the number of segments. The subsegments are assembled in advance, and on site they form the full circle of the stator. The integration of the segments into the turbine drivetrain is calculated by the finite element method. Cooling is by air, and the generator is connected to the grid through a full converter.
The mechanical part of the segments is designed for high precision and stability, the electrical part for high efficiency and trouble-free operation under the specified operating conditions. Therefore the segments are suitable for harsh offshore conditions. According to the manufacturer, many direct drive offshore turbines around the world already operate with its stator segments. The manufacturer draws on decades of development related to transmitting extreme torques and to material requirements for offshore conditions.
The compact design saves space in the nacelle on both onshore and offshore installations. The segments are made to the customer's specification with full integration into the nacelle structure, so each turbine project gets its own stator layout. Series production and the segmented design make handling of the units easier. The manufacturer links trouble-free operation with low maintenance to compliance with the specified operating and maintenance conditions.
Service also supplies new replacement segments for existing direct drive turbines. For the customer this is a way to restore the generator without replacing the whole machine. The item belongs to utility-level wind generator equipment, because stator segments form the main active unit of large gearless generators of offshore and onshore wind farms.
Technical specifications
| Purpose | stator of a gearless multipole synchronous wind turbine generator (usually with permanent magnets) |
|---|---|
| Generator power | scaled by segmentation, 3–20 MW |
| Cooling | air |
| Design | stator made of pre-assembled subsegments, finite element calculation |
| Grid connection | through a full converter |
| Application | onshore and especially offshore wind turbines |
Request a price and lead time
Direct Drive Segments: stator segments for direct drive wind turbine generators of 3–20 MW. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What generator power are the segments designed for?
Generator power is scaled by the number of segments in the range from 3 to 20 MW.
What cooling do the stator segments have?
The segments are air cooled. The generator is connected to the grid through a full converter.
Are the segments suitable for offshore wind turbines?
Yes, the mechanical precision and the electrical part are designed for harsh offshore conditions. According to the manufacturer, its segments already operate on many direct drive offshore turbines.
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