20 Pole (Rect Coil) 75x50x10 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 - 18:10

Duration:

00:00:38

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	0.541504	ai
Inner-to-outer magnet radius	0.773696	kd
Flux density in airgap	0.170535 T	Bmax
Flux density on magnet surface	0.174053 T	Bmg
First harmonic of flux density in airgap	0.149915 T	Bp
Flux per pole (Calculated)	0.000656081 Wb	Flux_pole
Magnets on a rotor disk	20	magnet_num
Distance between magnets	30.5544 mm	dist_magnet_Rin
Magnet mass	7500 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	37500 mm3	Vmag
Volume of all magnets	1500000 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	664.709 mm	Dout
Average radius	293.913 mm	Ravg
Inner radius	256.413 mm	Rin
Outer radius	332.354 mm	Rout
Effective outer radius	331.413 mm	Rout_eff
Mass of rotor disks	43.6966 kgr	BackIronMass
Volume of rotor disks	5552.3 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.612806 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

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	197	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	28.6757 mm	wc
Average length of coil turn	340.042 mm	lavg
Stator nominal temperature	75.2559 C°	tc_real
Stator surface area	2925.29 cm²	stator_surface_area
Heat coefficient	0.268777	cq_real
Current density	5.58427 A	Jmax_real
Resistivity of copper at nominal temperature	2.04001E-8 Ohm.m	pt
Resistance of a single coil	1.11103 Ohm	Rc
Phase resistance	5.55516 Ohm	Rphase
Phase inductance	0.0254969 H	Ls
Nagaoka constant	0.147729	Kn
Winding coefficient	0.95	kw
Volume of a single coil	126762 mm3	coil_volume
Weight of a single coil	744.094 g	coil_weight_constr
Coil hole at Ravg	50 mm	coil_hole_Ravg
Coil hole at Rin	50 mm	coil_hole_Rin_constr
Coil hole at Rout	50 mm	coil_hole_Rout_constr
Coil mass for construction	11.9055 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)	1979.98 W	Pnom
Copper losses (Calculated)	786.25 W	Pcopper
Eddy current losses (Calculated)	4.98334 W	Peddy
Generator efficiency (Calculated)	0.703143	efficiency_real
AC Power at the rectifier (Calculated)	1920.58 W	Pnom_rect
DC Power at the batteries (Calculated)	1728.52 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)	44.6856 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	577.048 EUR	Totalcost
Total generator mass	68.8192 kgr	TotalMass
Total generator volume	19.086 dm3	TotalVolume
Blade rotor mass	15.2925 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	122 EUR	Magcost
Magnet shipping cost	90.5797 EUR	shippingcost
Copper mass	11.0492 kgr	mcu
Cost of copper	163.087 EUR	coppercost
Resin mass	6.57343 kgr	resinmass
Cost of resin	90.7981 EUR	resincost
Resin volume	4833.4 cm3	ResinVolume
Total mass of one generator rotor	25.5983 kgr	TotalMassRotor
Cost of iron	53.7468 EUR	ironcost
Surface area of moulds	0.930663 m2	woodS
Total cost of moulds	147.417 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9724.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:

75mm

Magnet width:

50mm

Magnet thickness:

10mm

Rotor disk thickness:

Calculated

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

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