8m N52 75x35x15 5kW | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Kostas on Sun, 02/12/2018 - 19:33

Duration:

00:00:36

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	62.699 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	92.2639 RPM	n_nom
Nominal tip speed ratio	3.86278	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	13 mm	hr
Magnet width-to-pole pitch ratio	0.578272	ai
Inner-to-outer magnet radius	0.804832	kd
Flux density in airgap	0.742434 T	Bmax
Flux density on magnet surface	0.812761 T	Bmg
First harmonic of flux density in airgap	0.678228 T	Bp
Flux per pole (Calculated)	0.00213684 Wb	Flux_pole
Magnets on a rotor disk	36	magnet_num
Distance between magnets	18.9801 mm	dist_magnet_Rin
Magnet mass	21262.5 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	39375 mm3	Vmag
Volume of all magnets	2835000 mm3	VolumeMagnet
Remanent magnetic flux density	1.45 T	Br
Magnetic coercivity	1120020 A/m	Hc
Maximum Energy Product	422 KJ/m³	BHmax
Outer diameter	769.363 mm	Dout
Average radius	346.783 mm	Ravg
Inner radius	309.283 mm	Rin
Outer radius	384.682 mm	Rout
Effective outer radius	384.283 mm	Rout_eff
Mass of rotor disks	95.1264 kgr	BackIronMass
Volume of rotor disks	12087.2 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.30757 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	15 mm	tw
Number of phases	3	nphase
Number of coils per phase	9	q
Total number of coils in stator	27	coil_num
Number of turns per coil	13	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	5	No_wires_at_hand
Winding fill factor	0.44	kf
Copper wire cross-sectional area	11.35 mm2	sc
Copper wire cross-sectional area (Calculated)	10.8535 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	3.71835 mm	dc_theor
Coil leg width	22.5796 mm	wc
Average length of coil turn	268.216 mm	lavg
Stator nominal temperature	84.7854 C°	tc_real
Stator surface area	3270.36 cm²	stator_surface_area
Heat coefficient	0.305897	cq_real
Current density	6.6938 A	Jmax_real
Resistivity of copper at nominal temperature	2.08948E-8 Ohm.m	pt
Resistance of a single coil	0.00641905 Ohm	Rc
Phase resistance	0.0577714 Ohm	Rphase
Phase inductance	0.00014604 H	Ls
Nagaoka constant	0.2002	Kn
Winding coefficient	0.95	kw
Volume of a single coil	90843.3 mm3	coil_volume
Weight of a single coil	408.234 g	coil_weight_constr
Coil hole at Ravg	35 mm	coil_hole_Ravg
Coil hole at Rin	26.3063 mm	coil_hole_Rin_constr
Coil hole at Rout	43.7439 mm	coil_hole_Rout_constr
Coil mass for construction	11.4306 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	29.193 V	EMF_nom
Current at the nominal wind speed	75.9746 A	Iac_nom
Terminal voltage at the nominal wind speed	23.1967 V	V_term_line
Nominal frequency	27.6792 Hz	fnom
Generator power (Calculated)	5287.07 W	Pnom
Copper losses (Calculated)	1000.39 W	Pcopper
Eddy current losses (Calculated)	328.964 W	Peddy
Generator efficiency (Calculated)	0.793145	efficiency_real
AC Power at the rectifier (Calculated)	4599.75 W	Pnom_rect
DC Power at the batteries (Calculated)	4139.77 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	8	No_bolts_hub
Mass of bearing hub	29669.2 g	BearingHubMass
Rotational losses (Calculated)	49.5269 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	2976.8 EUR	Totalcost
Total generator mass	133.378 kgr	TotalMass
Total generator volume	35.7967 dm3	TotalVolume
Blade rotor mass	122.34 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	2434.95 EUR	Magcost
Magnet shipping cost	171.196 EUR	shippingcost
Copper mass	9.55269 kgr	mcu
Cost of copper	140.998 EUR	coppercost
Resin mass	7.4363 kgr	resinmass
Cost of resin	102.717 EUR	resincost
Resin volume	5467.87 cm3	ResinVolume
Total mass of one generator rotor	58.1944 kgr	TotalMassRotor
Cost of iron	117.005 EUR	ironcost
Surface area of moulds	1.14354 m2	woodS
Total cost of moulds	181.136 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-5818.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

4.00m

Aerodynamic coefficient:

0.22

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Design TSR:

7.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N52

Number of generator poles:

Magnet length:

75mm

Magnet width:

35mm

Magnet thickness:

15mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

13mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

User defined

Stator thickness:

15mm

Current density:

7.00A/mm2

System Inputs

System voltage:

48.00V

Nominal voltage:

48.00V

Transmission cable losses:

13.00%

Rectifier losses:

10.00%

Financial

Copper price:

12.00€/kg

Iron price:

1.00€/kg

Resin price:

11.23€/kg

Plywood price:

17.60 €/m²

Simulation Inputs

Also run UserAFPM:

false

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³