Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System

Research output: Contribution to conferencePosterResearch

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Abstract

The drivetrain of a 10 MW wind turbine has been designed as a direct drive transmission with a superconducting generator mounted in front of the hub and connected to the main frame through a King-pin stiff assembly by DNV-GL. The aeroelastic design loads of such an arrangement are evaluated based on the thrust and bending moments at the main bearing, both for ultimate design and in fatigue. It is found that the initial superconductor generator weight of 363 tons must be reduced by 25% in order not to result in higher extreme loads on main and yaw bearing than the reference10 MW geared reference drive train. A
weight reduction of 50% is needed in order to maintain main bearing fatigue damage equivalent to the reference drive train. Thus a target mass of front mounted superconducting direct drive generators is found to be between 183-272 tons.
Original languageEnglish
Publication date2016
Number of pages1
Publication statusPublished - 2016
EventThe Science of Making Torque from Wind 2016 - Technische Universität München (TUM), Munich, Germany
Duration: 5 Oct 20167 Oct 2016
Conference number: 6
https://www.events.tum.de/?sub=29

Conference

ConferenceThe Science of Making Torque from Wind 2016
Number6
LocationTechnische Universität München (TUM)
CountryGermany
CityMunich
Period05/10/201607/10/2016
Internet address

Cite this

Abrahamsen, A. B., & Natarajan, A. (2016). Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System. Poster session presented at The Science of Making Torque from Wind 2016, Munich, Germany.
Abrahamsen, Asger Bech ; Natarajan, Anand. / Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System. Poster session presented at The Science of Making Torque from Wind 2016, Munich, Germany.1 p.
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title = "Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System",
abstract = "The drivetrain of a 10 MW wind turbine has been designed as a direct drive transmission with a superconducting generator mounted in front of the hub and connected to the main frame through a King-pin stiff assembly by DNV-GL. The aeroelastic design loads of such an arrangement are evaluated based on the thrust and bending moments at the main bearing, both for ultimate design and in fatigue. It is found that the initial superconductor generator weight of 363 tons must be reduced by 25{\%} in order not to result in higher extreme loads on main and yaw bearing than the reference10 MW geared reference drive train. Aweight reduction of 50{\%} is needed in order to maintain main bearing fatigue damage equivalent to the reference drive train. Thus a target mass of front mounted superconducting direct drive generators is found to be between 183-272 tons.",
author = "Abrahamsen, {Asger Bech} and Anand Natarajan",
year = "2016",
language = "English",
note = "The Science of Making Torque from Wind 2016, TORQUE 2016 ; Conference date: 05-10-2016 Through 07-10-2016",
url = "https://www.events.tum.de/?sub=29",

}

Abrahamsen, AB & Natarajan, A 2016, 'Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System', The Science of Making Torque from Wind 2016, Munich, Germany, 05/10/2016 - 07/10/2016.

Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System. / Abrahamsen, Asger Bech; Natarajan, Anand.

2016. Poster session presented at The Science of Making Torque from Wind 2016, Munich, Germany.

Research output: Contribution to conferencePosterResearch

TY - CONF

T1 - Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System

AU - Abrahamsen, Asger Bech

AU - Natarajan, Anand

PY - 2016

Y1 - 2016

N2 - The drivetrain of a 10 MW wind turbine has been designed as a direct drive transmission with a superconducting generator mounted in front of the hub and connected to the main frame through a King-pin stiff assembly by DNV-GL. The aeroelastic design loads of such an arrangement are evaluated based on the thrust and bending moments at the main bearing, both for ultimate design and in fatigue. It is found that the initial superconductor generator weight of 363 tons must be reduced by 25% in order not to result in higher extreme loads on main and yaw bearing than the reference10 MW geared reference drive train. Aweight reduction of 50% is needed in order to maintain main bearing fatigue damage equivalent to the reference drive train. Thus a target mass of front mounted superconducting direct drive generators is found to be between 183-272 tons.

AB - The drivetrain of a 10 MW wind turbine has been designed as a direct drive transmission with a superconducting generator mounted in front of the hub and connected to the main frame through a King-pin stiff assembly by DNV-GL. The aeroelastic design loads of such an arrangement are evaluated based on the thrust and bending moments at the main bearing, both for ultimate design and in fatigue. It is found that the initial superconductor generator weight of 363 tons must be reduced by 25% in order not to result in higher extreme loads on main and yaw bearing than the reference10 MW geared reference drive train. Aweight reduction of 50% is needed in order to maintain main bearing fatigue damage equivalent to the reference drive train. Thus a target mass of front mounted superconducting direct drive generators is found to be between 183-272 tons.

M3 - Poster

ER -

Abrahamsen AB, Natarajan A. Variation of Extreme and Fatigue Design Loads on the Main Bearing of a Front Mounted Direct Drive System. 2016. Poster session presented at The Science of Making Torque from Wind 2016, Munich, Germany.