Motivation

BARD 5MWGlobal Offshore Wind Energy Markets and Strategies,2009

In 2020, 85% of offshore wind turbine installations will be larger than 5 MW

Wind Turbines: Constantly Growing How big?

UpWind Project: A 20 MW Wind Turbine is Feasible

www.upwind.eu

Superconducting Machines

Courtesy of Siemens, Converteam (ALSTOM)

Siemens: 400 kW

Converteam (ALSTOM): 5 MW HTS

Power Applications : Electrical Machines

36.5 MW, 120 rpm (U.S. Navy, AMSC)

Courtesy of AMSC

Direct-Drive SolutionsEnercon4.5 MW, 13 rpm220 tonnes

Harakosan 1.5MW,18 rpm,47 tonnes

AMSC, 36.5MW, 120rpm, 75 tonnes

(*) D. Bang et.al. “Review of Generator Systems for Direct-Drive Wind Turbines,” 2008,

All data available at goo.gl/ZZivv

Reliability of Wind Turbines

Hahn, B., & Durstewitz, M. (2007). Wind Energy-Reliability of Wind Turbines.

~1MW, 1500 onshore turbines

Reliability?

Cooling System Cryogenic Couplers Electric Brushes Transient torques on

SC Demagnetization for

Bulk SC AC losses on SC wire

Issues with Superconducting GeneratorsSeaTitan

AMSC, 10 MW, 10 rpm

Direct-drive superconducting generator

Transverse Flux HTSG

Pros Single Stationary SC Coil No Brushes No Cryogenic Coupler Bidirectional flux High Torque Density

Cons Magnetic Attraction

Forces 3D Flux (Soft magnetic

composites needed)

Transverse Flux HTSG

Electromagnetic Modelling

Main Specifications

Power Output

70 kW

Speed 100 rpm

Diameter 1.3 m

Axial Length 0.5 m

SC Wire Current

216 A

SC Wire Length

880 m

Next Stage: Linear Prototype

Next Stage: Linear Prototype

THANKS