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A MAGNETICALLY-GEARED COMPACT 3MW DIRECT DRIVE GENERATOR EWEC 2010

A MAGNETICALLY-GEARED COMPACT 3MW DIRECT DRIVE GENERATOR EWEC 2010. Overview. Pseudo direct drive PDD ® W ind generator development Benefits for wind energy. Magnetic gearing & PDD ®. Video presentation. High torque magnetic gear . Three components

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A MAGNETICALLY-GEARED COMPACT 3MW DIRECT DRIVE GENERATOR EWEC 2010

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  1. A MAGNETICALLY-GEARED COMPACT 3MW DIRECT DRIVE GENERATOR EWEC 2010

  2. Overview • Pseudo direct drive PDD® • Wind generator development • Benefits for wind energy

  3. Magnetic gearing & PDD®

  4. Video presentation

  5. High torque magnetic gear Three components Two are free to rotate, the third is mechanically earthed

  6. Field of inner magnets without pole-pieces 4 pole-pair spatial harmonic (fundamental)

  7. Field of inner magnets with pole-pieces Original 4 pole-pair fundamental Harmonic at 27-4=23

  8. No pole-pieces

  9. With pole-pieces

  10. Magnetic gear benefits • Improved reliability • Improved efficiency • Reduced maintenance • No gear wear • Lighter for large torques • Inherent overload protection • Unlikely to jam • Reduced noise/vibration

  11. A combination of two magnetic transmissions

  12. PDD®benefits • Highest torque-density electrical machine • Removes gearbox • Overload protection • Very high efficiency • Requires little or no cooling • High power factor • Standard power electronic control

  13. 3MW wind turbine PDD® generator

  14. 3MW PDD® • 3.8m diameter • 1.8m length • 40T mass

  15. Size reduction 3MW Magnomatics PDD 3.8m OD 1.8 length 40 tonnes. Geared DFIG Advanced DD PMG 3MW 5m OD 2.5m length 75 tonnes

  16. Annual energy output Taken from Garrad Hassan study

  17. Benefits for wind energy Removes gearbox -> increases turbine reliability High efficiency Light weight Low maintenance Torque fuse protects drivetrain Scalable for larger WTs

  18. Next steps Design, build and test 500kW demonstrator Evaluate technical and economic benefit Develop 3MW generator Test on turbine Certification and production engineering Develop 6-7MW generator for offshore

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