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Direct Drive
The drive system for the ENERCON wind energy converters is based on a simple principle: Fewer rotating components reduce mechanical stress and at the same time increase the technical service life of the equipment. Maintenance and service costs for the wind turbine are lower (fewer wearing parts, no gear oil change, etc.) and operating costs are reduced.
The rotor hub and annular generator are directly connected to each other as a fixed unit without gears. The rotor unit is mounted on a fixed axle, the so-called axle pin. Compared to conventional geared systems that have a large number of bearing points in a moving drive train, ENERCON’s drive system has only two slow-moving roller bearings. The reason for this is the low speed of the direct drive.
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ENERCON direct drive: few rotating
components increase the lifespan
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The generator of an E-70 undergoes the same number of rotations in 20 years as the generators in conventional wind turbines in three months.
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A few years ago only the rotor hub was made of cast steel, nowadays the use of modern spheroidal graphite cast iron makes it possible to manufacture other major components such as blade adaptors, axle pins and main carriers with this process.
ENERCON carries out advanced development of cast components in close collaboration with the foundries. All cast components are drawn on a 3D CAD system and calculated using the finite element method to test strain increases at critical points. During the entire prototype phase, the designer tests and optimizes performance. Cast components are not released for further steps in ENERCON’s manufacturing process until comprehensive quality testing has taken place, thus guaranteeing high ENERCON quality standards in the cast component supply sector.
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ENERCON's Quality Testing Procedures For Cast Components
- Structural inspection on component
- Ultra sound test
- X-ray test
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Enercon India Limited
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