lev | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Garry D on Thu, 20/03/2025 - 02:45

Duration:

00:00:11

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)	571.07 RPM	n_nom
Nominal tip speed ratio	3.58632	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.746737	ai
Inner-to-outer magnet radius	0.619965	kd
Flux density in airgap	0.0486058 T	Bmax
Flux density on magnet surface	0.412621 T	Bmg
First harmonic of flux density in airgap	0.0461814 T	Bp
Flux per pole (Calculated)	0.000332908 Wb	Flux_pole
Magnets on a rotor disk	20	magnet_num
Distance between magnets	0.5 mm	dist_magnet_Rin
Magnet mass	1200 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	4000 mm3	Vmag
Volume of all magnets	160000 mm3	VolumeMagnet
Remanent magnetic flux density	1.195 T	Br
Magnetic coercivity	918880 A/m	Hc
Maximum Energy Product	287 KJ/m³	BHmax
Outer diameter	211.455 mm	Dout
Average radius	85.2535 mm	Ravg
Inner radius	65.2535 mm	Rin
Outer radius	105.728 mm	Rout
Effective outer radius	105.254 mm	Rout_eff
Mass of rotor disks	2.76376 kgr	BackIronMass
Volume of rotor disks	351.177 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	33 mm	tw
Number of phases	3	nphase
Number of coils per phase	5	q
Total number of coils in stator	15	coil_num
Number of turns per coil	41	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	4	No_wires_at_hand
Winding fill factor	0.46	kf
Copper wire cross-sectional area	10.16 mm2	sc
Copper wire cross-sectional area (Calculated)	9.80241 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	3.53372 mm	dc_theor
Coil leg width	27.4414 mm	wc
Average length of coil turn	135.022 mm	lavg
Stator nominal temperature	31.4731 C°	tc_real
Stator surface area	1111.56 cm²	stator_surface_area
Heat coefficient	0.0495994	cq_real
Current density	1.92961 A	Jmax_real
Resistivity of copper at nominal temperature	1.75508E-8 Ohm.m	pt
Resistance of a single coil	0.00956292 Ohm	Rc
Phase resistance	0.0478146 Ohm	Rphase
Phase inductance	0.000172409 H	Ls
Nagaoka constant	0.371304	Kn
Winding coefficient	0.120339	kw
Volume of a single coil	122271 mm3	coil_volume
Weight of a single coil	527.356 g	coil_weight_constr
Coil hole at Ravg	12.5 mm	coil_hole_Ravg
Coil hole at Rin	5 mm	coil_hole_Rin_constr
Coil hole at Rout	20 mm	coil_hole_Rout_constr
Coil mass for construction	8.43769 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	2.566 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	3.47109 V	EMF_nom
Current at the nominal wind speed	19.6048 A	Iac_nom
Terminal voltage at the nominal wind speed	2.8226 V	V_term_line
Nominal frequency	95.1784 Hz	fnom
Generator power (Calculated)	166.01 W	Pnom
Copper losses (Calculated)	55.1325 W	Pcopper
Eddy current losses (Calculated)	16.3658 W	Peddy
Generator efficiency (Calculated)	0.672806	efficiency_real
AC Power at the rectifier (Calculated)	149.409 W	Pnom_rect
DC Power at the batteries (Calculated)	134.468 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)	9.23456 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	313.865 EUR	Totalcost
Total generator mass	14.3625 kgr	TotalMass
Total generator volume	1.791 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	118.25 EUR	Magcost
Magnet shipping cost	9.66184 EUR	shippingcost
Copper mass	7.54241 kgr	mcu
Cost of copper	111.326 EUR	coppercost
Resin mass	2.85637 kgr	resinmass
Cost of resin	39.4547 EUR	resincost
Resin volume	2100.27 cm3	ResinVolume
Total mass of one generator rotor	3.96376 kgr	TotalMassRotor
Cost of iron	3.39943 EUR	ironcost
Surface area of moulds	0.261586 m2	woodS
Total cost of moulds	41.4353 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9744.mat

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:

Single Rotor

Magnetic material:

NdFeB N35

Number of generator poles:

Magnet length:

40mm

Magnet width:

20mm

Magnet thickness:

5mm

Rotor disk thickness:

Calculated

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

5.00mm

Winding fill factor:

Calculated

Current density:

2.00A/mm2

System Inputs

System voltage:

6.00V

Nominal voltage:

6.00V

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:

true

Simulation step:

Current step:

RPM Step:

Mesh size:

Automesh

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³