TEST | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Drame on Thu, 17/07/2025 - 15:45

Duration:

00:00:02

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	417.994 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	566.672 RPM	n_nom
Nominal tip speed ratio	3.5587	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.773146	ai
Inner-to-outer magnet radius	0.526297	kd
Flux density in airgap	0.54 T	Bmax
Flux density on magnet surface	0.62 T	Bmg
First harmonic of flux density in airgap	0.4 T	Bp
Flux per pole (Calculated)	0.0008556 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	-3.2403 mm	dist_magnet_Rin
Magnet mass	2484 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	331200 mm3	VolumeMagnet
Remanent magnetic flux density	1.265 T	Br
Magnetic coercivity	982324 A/m	Hc
Maximum Energy Product	326 KJ/m³	BHmax
Outer diameter	196.518 mm	Dout
Average radius	74.1073 mm	Ravg
Inner radius	51.1073 mm	Rin
Outer radius	98.259 mm	Rout
Effective outer radius	97.1073 mm	Rout_eff
Mass of rotor disks	4.77418 kgr	BackIronMass
Volume of rotor disks	606.631 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	3	q
Total number of coils in stator	9	coil_num
Number of turns per coil	23	Nc
Copper wire diameter	1.06 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.88 mm2	sc
Copper wire cross-sectional area (Calculated)	0.803633 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	0.88 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.0118 mm	dc_theor
Coil leg width	2.83077 mm	wc
Average length of coil turn	160.889 mm	lavg
Stator nominal temperature	64.6937 C°	tc_real
Stator surface area	81.9789 cm²	stator_surface_area
Heat coefficient	0.224516	cq_real
Current density	5.47932 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.0879608 Ohm	Rc
Phase resistance	0.263882 Ohm	Rphase
Phase inductance	0.000105649 H	Ls
Nagaoka constant	0.334333	Kn
Winding coefficient	0.95	kw
Volume of a single coil	5920.7 mm3	coil_volume
Weight of a single coil	31.6436 g	coil_weight_constr
Coil hole at Ravg	30 mm	coil_hole_Ravg
Coil hole at Rin	30 mm	coil_hole_Rin_constr
Coil hole at Rout	30 mm	coil_hole_Rout_constr
Coil mass for construction	0.316436 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.113 V	EMF_nom
Current at the nominal wind speed	4.8218 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	56.6672 Hz	fnom
Generator power (Calculated)	163.32 W	Pnom
Copper losses (Calculated)	18.4056 W	Pcopper
Eddy current losses (Calculated)	0.95001 W	Peddy
Generator efficiency (Calculated)	0.835086	efficiency_real
AC Power at the rectifier (Calculated)	146.988 W	Pnom_rect
DC Power at the batteries (Calculated)	132.289 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	4	No_bolts_hub
Mass of bearing hub	3708.65 g	BearingHubMass
Rotational losses (Calculated)	12.8971 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	294.677 EUR	Totalcost
Total generator mass	8.63026 kgr	TotalMass
Total generator volume	1.78956 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	230.554 EUR	Magcost
Magnet shipping cost	20 EUR	shippingcost
Copper mass	0.262009 kgr	mcu
Cost of copper	3.86725 EUR	coppercost
Resin mass	1.11006 kgr	resinmass
Cost of resin	15.3332 EUR	resincost
Resin volume	816.223 cm3	ResinVolume
Total mass of one generator rotor	3.62909 kgr	TotalMassRotor
Cost of iron	5.87225 EUR	ironcost
Surface area of moulds	0.24653 m2	woodS
Total cost of moulds	39.0504 EUR	woodcost

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Aerodynamic coefficient:

0.30

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 N40

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

13mm

Current density:

6.00A/mm2

System Inputs

System voltage:

24.00V

Nominal voltage:

24.00V

Transmission cable losses:

10.00%

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