20 Pole (Keyhole Coil) 100x50x15 Ferrite Piggott (4F) CoP=0.37 TSR=6.25 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by tlangdon12 on Sat, 08/03/2025 - 18:12

Duration:

00:00:02

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	150.478 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	298.567 RPM	n_nom
Nominal tip speed ratio	6.25	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	8 mm	hr
Magnet width-to-pole pitch ratio	0.807183	ai
Inner-to-outer magnet radius	0.595426	kd
Flux density in airgap	0.157 T	Bmax
Flux density on magnet surface	0.237 T	Bmg
First harmonic of flux density in airgap	0.1 T	Bp
Flux per pole (Calculated)	0.001185 Wb	Flux_pole
Magnets on a rotor disk	20	magnet_num
Distance between magnets	-3.7641 mm	dist_magnet_Rin
Magnet mass	15000 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	75000 mm3	Vmag
Volume of all magnets	3000000 mm3	VolumeMagnet
Remanent magnetic flux density	0.39 T	Br
Magnetic coercivity	227950 A/m	Hc
Maximum Energy Product	30 KJ/m³	BHmax
Outer diameter	496.869 mm	Dout
Average radius	197.173 mm	Ravg
Inner radius	147.173 mm	Rin
Outer radius	248.434 mm	Rout
Effective outer radius	247.173 mm	Rout_eff
Mass of rotor disks	24.4156 kgr	BackIronMass
Volume of rotor disks	3102.37 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 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	109	Nc
Copper wire diameter	1.25 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.65	kf
Copper wire cross-sectional area	1.23 mm2	sc
Copper wire cross-sectional area (Calculated)	1.14478 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	1.23 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.20761 mm	dc_theor
Coil leg width	16.0249 mm	wc
Average length of coil turn	328.195 mm	lavg
Stator nominal temperature	76.2767 C°	tc_real
Stator surface area	1577.79 cm²	stator_surface_area
Heat coefficient	0.272871	cq_real
Current density	5.58427 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.608376 Ohm	Rc
Phase resistance	3.04188 Ohm	Rphase
Phase inductance	0.0085603 H	Ls
Nagaoka constant	0.173919	Kn
Winding coefficient	0.95	kw
Volume of a single coil	68370.9 mm3	coil_volume
Weight of a single coil	400.587 g	coil_weight_constr
Coil hole at Ravg	50 mm	coil_hole_Ravg
Coil hole at Rin	29.0506 mm	coil_hole_Rin_constr
Coil hole at Rout	70.7421 mm	coil_hole_Rout_constr
Coil mass for construction	6.4094 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	68.4267 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	135.767 V	EMF_nom
Current at the nominal wind speed	6.86865 A	Iac_nom
Terminal voltage at the nominal wind speed	176.199 V	V_term_line
Nominal frequency	49.7611 Hz	fnom
Generator power (Calculated)	2238.09 W	Pnom
Copper losses (Calculated)	430.533 W	Pcopper
Eddy current losses (Calculated)	1.59529 W	Peddy
Generator efficiency (Calculated)	0.826514	efficiency_real
AC Power at the rectifier (Calculated)	2170.95 W	Pnom_rect
DC Power at the batteries (Calculated)	1953.85 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	5	No_bolts_hub
Mass of bearing hub	8344.46 g	BearingHubMass
Rotational losses (Calculated)	37.6508 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	487.999 EUR	Totalcost
Total generator mass	48.4084 kgr	TotalMass
Total generator volume	12.6034 dm3	TotalVolume
Blade rotor mass	15.2925 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	227.579 EUR	Magcost
Magnet shipping cost	181.159 EUR	shippingcost
Copper mass	5.90054 kgr	mcu
Cost of copper	87.092 EUR	coppercost
Resin mass	3.09223 kgr	resinmass
Cost of resin	42.7127 EUR	resincost
Resin volume	2273.7 cm3	ResinVolume
Total mass of one generator rotor	19.7078 kgr	TotalMassRotor
Cost of iron	30.0312 EUR	ironcost
Surface area of moulds	0.635 m2	woodS
Total cost of moulds	100.584 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9725.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

2.00m

Aerodynamic coefficient:

0.37

Cut-in wind speed:

3.50m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

9.00

Design TSR:

6.25

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

Ferrite C8

Number of generator poles:

Magnet length:

100mm

Magnet width:

50mm

Magnet thickness:

15mm

Rotor disk thickness:

Calculated

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

6.00A/mm2

System Inputs

System voltage:

160.00V

Nominal voltage:

400.00V

Transmission cable losses:

3.00%

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