Submitted by Kostas on Thu, 29/03/2018 - 10:09 Duration: 00:00:41Tabs Results Flux density in airgap plotFlux density on magnet surface plotFlux density in the magnet rotor disk Blade Rotor Outputs PropertyValueVariable name RPM at the cut-in wind speed (TSR)64.3067 RPMn_cut_in RPM at the nominal wind speed (TSR)97.7104 RPMn_nom Nominal tip speed ratio3.98854 tsr_nom Generator Rotor Outputs PropertyValueVariable name Rotor disk thickness12 mmhr Magnet width-to-pole pitch ratio0.404957 ai Inner-to-outer magnet radius0.840364 kd Flux density in airgap0.607314 TBmax Flux density on magnet surface0.744525 TBmg First harmonic of flux density in airgap0.473964 TBp Flux per pole (Calculated)0.00139626 WbFlux_pole Magnets on a rotor disk44 magnet_num Distance between magnets31.38 mmdist_magnet_Rin Magnet mass18562.5 gMagnetMass Magnet density7.5 g/cm3mag_density Volume of a single magnet28125 mm3Vmag Volume of all magnets2475000 mm3VolumeMagnet Remanent magnetic flux density1.35 TBr Magnetic coercivity1041910 A/mHc Maximum Energy Product366 KJ/m³BHmax Outer diameter939.971 mmDout Average radius432.319 mmRavg Inner radius394.819 mmRin Outer radius469.985 mmRout Effective outer radius469.819 mmRout_eff Mass of rotor disks131.07 kgrBackIronMass Volume of rotor disks16654.4 cm3BackIronVolume Maximum flux density in the magnet rotor disk0.972955 TSaturMAX Is the magnet rotor disk saturated?No Saturation Generator Stator Outputs PropertyValueVariable name Stator thickness15 mmtw Number of phases3 nphase Number of coils per phase11 q Total number of coils in stator33 coil_num Number of turns per coil13 Nc Copper wire diameter1.7 mmdc Number of wires at hand6 No_wires_at_hand Winding fill factor0.42 kf Copper wire cross-sectional area13.62 mm2sc Copper wire cross-sectional area (Calculated)13.6105 mm²sc_theor Copper wire cross-sectional area of a sinlge wire2.27 mm²sc_multi_wires Copper wire diameter (Calculated)4.16391 mmdc_theor Coil leg width28.3858 mmwc Average length of coil turn269.523 mmlavg Stator nominal temperature89.6472 C°tc_real Stator surface area5049.41 cm²stator_surface_area Heat coefficient0.323972 cq_real Current density6.99511 AJmax_real Resistivity of copper at nominal temperature2.1229E-8 Ohm.mpt Resistance of a single coil0.00546124 OhmRc Phase resistance0.0600736 OhmRphase Phase inductance0.000167491 HLs Nagaoka constant0.186043 Kn Winding coefficient0.95 kw Volume of a single coil114759 mm3coil_volume Weight of a single coil492.268 gcoil_weight_constr Coil hole at Ravg25 mmcoil_hole_Ravg Coil hole at Rin17.9002 mmcoil_hole_Rin_constr Coil hole at Rout32.1754 mmcoil_hole_Rout_constr Coil mass for construction16.7371 kgrmcu_constr EMF at the cut-in wind speed (Calculated)20.528 VEMF_cut_in EMF at the nominal wind speed (Calculated)30.1776 VEMF_nom Current at the nominal wind speed95.2733 AIac_nom Terminal voltage at the nominal wind speed22.5808 VV_term_line Nominal frequency35.8271 Hzfnom Generator power (Calculated)6454.05 WPnom Copper losses (Calculated)1635.87 WPcopper Eddy current losses (Calculated)509.18 WPeddy Generator efficiency (Calculated)0.74559 efficiency_real AC Power at the rectifier (Calculated)5808.64 WPnom_rect DC Power at the batteries (Calculated)5227.78 WPnom_dc Generator Bearing Hub Outputs PropertyValueVariable name Number of bolts on hub8 No_bolts_hub Mass of bearing hub29669.2 gBearingHubMass Rotational losses (Calculated)57.1984 WProt Costs, Mass and Volume PropertyValueVariable name Total generator cost2599.68 EURTotalcost Total generator mass174.064 kgrTotalMass Total generator volume52.0451 dm3TotalVolume Blade rotor mass113.392 kgrblade_rotor_mass Softwood density500 kgr/m³softwood_density Cost of magnets1844.12 EURMagcost Magnet shipping cost149.457 EURshippingcost Copper mass14.0789 kgrmcu Cost of copper207.804 EURcoppercost Resin mass10.352 kgrresinmass Cost of resin142.991 EURresincost Resin volume7611.75 cm3ResinVolume Total mass of one generator rotor74.8164 kgrTotalMassRotor Cost of iron161.216 EURironcost Surface area of moulds1.53753 m2woodS Total cost of moulds243.544 EURwoodcost Output files Octave/Matlab variable file: simulation-488.mat Input parameters Blade Rotor Inputs Turbine radius: 3.90mAerodynamic coefficient: 0.30Cut-in wind speed: 3.00m/sNominal wind speed: 10.00m/sCut-in TSR: 8.75Design TSR: 7.00Air density: 1.204kg/m³ Generator Rotor Inputs AFPM rotor topology: Double RotorMagnetic material: NdFeB N45Number of generator poles: 44Magnet length: 75mmMagnet width: 25mmMagnet thickness: 15mmRotor disk thickness: User DefinedRotor disk thickness: 12mmMechanical clearance: 3.00mm Generator Stator Inputs Select coil type: KeyholeWinding fill factor: CalculatedStator thickness: User definedStator thickness: 15mmCurrent density: 7.00A/mm2 System Inputs System voltage: 48.00VNominal voltage: 48.00VTransmission cable losses: 10.00%Rectifier losses: 10.00% Financial Copper price: 12.00€/kgIron price: 1.00€/kgResin price: 11.23€/kgPlywood price: 17.60 €/m² Simulation Inputs Also run UserAFPM: false Constants Copper resistivity: 1.678E-8 Ω·mCopper density: 8.94g/cm³Iron density: 7.87g/cm³Resin density: 1.36g/cm³
