|Industry||Wind power industry|
|Hans-Dieter Kettwig (Managing Director)|
Number of employees
Enercon GmbH, based in Aurich, Lower Saxony, Germany, is the fourth-largest wind turbine manufacturer in the world and has been the market leader in Germany since the mid-nineties. Enercon has production facilities in Germany (Aurich, Emden and Magdeburg), Sweden, Brazil, India, Canada, Turkey and Portugal. In June 2010, Enercon announced that they would be setting up Irish headquarters in Tralee.
As of December 2017[update], Enercon had installed more than 26,300 wind turbines, with a power generating capacity exceeding 43 GW. The most-often installed model is the E-40, which pioneered the gearbox-less design in 1993. As of July 2011, Enercon has a market share of 7.2% world-wide (fifth-highest) and 59.2% in Germany.
Enercon wind turbines have some special technical features compared to turbines of most other wind turbine manufacturers . Characteristic is the gearless propulsion concept, on which Enercon has pioneered this technology since 1993. The E-40/500 kW series was the first gearless generation of turbines. Earlier Enercon facilities had a transmission train. The hub with the rotor blades is gearless directly connected to the rotor of the ring generator (direct drive). The rotor unit rotates about a front and rear main bearing about a fixed axis (bearings). Thus, the speed of the rotor is transmitted directly to the high-pole synchronous generator, wherein the rotor rotates in the stator (inner rotor), differently. The Enercon generator is installed without permanent magnets, thus allowing the company to not rely on rare-earth metals. However, grid losses accompany the provision of electrical excitation power. Compared to transmission systems, both the speed of the rotating components and the mechanical load changes over the service life are lower. Depending on the wind speed, the speed is variable between 18-45 RPM for the E-33 and 5-11.7 RPM for the E-126, while for a gearbox a generator speed of about 1500 / min is at Rated power is achieved. The large Enercon generators in turn lead to high tower head masses, constructive and logistical challenges.
The Enercon systems are visually easy to distinguish from the systems of other manufacturers. The nacelles of the plants have been drop-shaped since 1995/96. The design of this unique gondola/teardrop was developed by the British architect Norman Foster , whom is also notable for designing the dome of the Berlin Reichstag . In Germany and many other countries, the tower carries coloured green rings above the foundation, which are getting brighter from bottom to top. On islands, the manufacturer alternatively offers a gradation in blue, as it was implemented on the island of Borkum . The NCS grading is intended to better integrate the plant towers into the horizon. The rotor blades were the only ones on the market with blade tips similar to the winglets on aircraft, the technical term for this being "Tips".
In 2008, the first E-126 turbines (successor of the E-112) were installed at various sites throughout Germany and Belgium, including the Estinnes wind farm (consisting of eleven E-126 turbines) in Belgium. Although the E-126 turbine was initially developed with a power rating of 6 MW, it has since been upgraded to 7.5 MW. The E-82 turbine was also upgraded and is available in 2, 2.3, and 3 MW versions.
Currently Enercon does not offer or supply wind turbines to offshore projects and has at times expressed skepticism about offshore wind parks. Enercon was rumored to have been ready to supply turbines to Germany's Alpha Ventus offshore wind farm and to a near-shore park near Wilhelmshaven but did not do so.
Note: wind turbine designations in brackets mean the turbine either temporarily unavailable. or has been taken off sale permanently.
|Model Number||Rated Power Output||Rotor Diameter (meters)||Hub Height (meters)||Notes||Source(s)||Number installed|
|(E-10/E-12)||30 kW||10||Developed in 2007, but unknown whether it's still being produced.||3|
|(E-15/16)||55 kW||15/16||Developed 1984, no longer available||||46|
|(E-17/E-18)||80 kW||17/18||Developed and installed 1988, no longer available||||158|
|(E-32)||100 - 300 kW||32||Developed and installed 1988, no longer available||||Unknown|
|E-33||330 kW||33.4||37, 44, 50||||84|
|(E-40)||500 kW (OG.), 600 kW (Rev.)||40||First gearless drive, no longer available||||5879 total (1887 original, 3992 revised)|
|E-44||900 kW||44||45, 55||||563|
|E-48||800 kW||48||50, 55, 56, 60, 65, 76||||1878|
|E-53||800 kW||52.9||60, 73||Prototype developed 2006||||1240|
|(E-58)||1 MW||58||Prototype installed in 1998 - replaced by E-48, henceforth no longer available||225|
|(E-66)||1.5 MW - 2.0 MW||66 & 70||Prototype developed 1995, no longer available||2486|
|E-70||2.3 MW||71||57, 58, 64, 70, 74.5, 84, 98, 113||Direct drive||||4360|
|E-82||2 MW, 2.3 MW, 3MW||82||78, 84, 98, 108||Direct drive||||3146|
|E-92||2.3 MW||92||84, 98, 108, 138||Direct drive
||||~ 250|
|E-101||3 MW||101||99, 124, 135, 149||Direct drive
Prototype installed June 2011
|E-103 EP2||2.35 MW||103||98 or 138||Direct drive - two prototypes installed in France in 2017||2|
|(E-112)||4.5 - 6 MW||112 & 114||108, 124||Replaced by E-126, no longer available||||9|
|E-115||3.0 MW||115||92.5-149||Direct drive||||?|
|E-126||7.56 MW (first version 6.0 MW)||126||135||Prototype developed October 2007||||95 as of autumn 2016|
|E-126 EP3 4.0MW||4.0 MW||126||86, 116, or 135||Based on a different platform to other Enercon turbines||||1 near Kirch Muslow|
|E-138 EP3||3.5MW||139||81, 111, 131, or 160||Based on a different platform to other Enercon turbines||||Yet to be installed|
|E-126 EP4 4.2MW||4.2 MW||126||135||Designed for low-wind sites||||1 prototype installed near Lelystad|
|E-141 EP4 4.2MW||4.2 MW||141||129 or 159||Prototype prepared for late 2016, based on E-126 EP4. 30-year design life||||TBA|
Enercon was prohibited from exporting their wind turbines to the US until 2010 due to alleged infringement of U.S. Patent 5,083,039 . In a dispute before the United States International Trade Commission, Enercon did not challenge the validity of the US patent but argued that their technology was not affected. The ITC decided that the patent covered the technology in question and banned Enercon turbines from the US market until 2010. Later on, a cross patent agreement was made with the competitor General Electric, the successor of Kenetech, after similar claims of Enercon against GE. According to a NSA employee detailed information concerning Enercon was passed on to Kenetech via ECHELON. The aim of the alleged industrial espionage against Enercon was the forwarding of details of Wobben's generator technology to a US firm.
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