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Presenter: Björn Bolund

Rotating and Linear Synchronous Generators for Renewable Electric Energy Conversion - an Update of the Ongoing Research Projects at Uppsala University. Presenter: Björn Bolund. Author: whole group. Research Areas Water Current Energy Bio-fuelled plants Wave Energy Wind Energy Hydro Power

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Presenter: Björn Bolund

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  1. Rotating and Linear Synchronous Generators for Renewable Electric Energy Conversion - an Update of the Ongoing Research Projects at Uppsala University Presenter: Björn Bolund Author: whole group

  2. Research Areas • Water Current Energy • Bio-fuelled plants • Wave Energy • Wind Energy • Hydro Power • Pulsed power ?

  3. Water current energy Permanent magnets At high velocities Only on a few places Velocities ~ 1 m/s Power-rating ~ 10 kW and upp

  4. Bio-fuelled plants Process Turbogenerator Drawbacks: Cooling is expensive Our approach: High voltage 136 kV / 42 MW

  5. Why high voltage? Poynting’s theorem The rate at which electromagnetic energy is dissipated into heat per unit volume Trad XLPE E(kV/mm) 2.5 - 3 3 - 15 A/mm 4 – 4.5 1.5 – 3 P/mm 10-13.5 4.5 - 45 2 Poynting vector 3

  6. Wave energy – The linear generator Buoy Rope Linear generator

  7. Current Neodymium-Iron-Boron magnets Threephse winding, standardcable Rotor Stator

  8. Wind energy Increase overload capabillity Generator

  9. Hydropower - Eccentric rotor -elliptic rotor

  10. Pulsed power High power pulses: 100MW – 10TW during a few microseconds 80 KV 5.5 kA 0.5 GW 2.5 micro seconds

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