3.6m 30x20x10 N42 24 pole - Keyhole (last simulation was 28 pole by accident) | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by gbroques on Wed, 07/08/2024 - 02:16

Duration:

00:00:39

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	139.331 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	223.89 RPM	n_nom
Nominal tip speed ratio	4.21809	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.290701	ai
Inner-to-outer magnet radius	0.892006	kd
Flux density in airgap	0.502529 T	Bmax
Flux density on magnet surface	0.659724 T	Bmg
First harmonic of flux density in airgap	0.314963 T	Bp
Flux per pole (Calculated)	0.000396146 Wb	Flux_pole
Magnets on a rotor disk	24	magnet_num
Distance between magnets	44.8723 mm	dist_magnet_Rin
Magnet mass	2160 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	6000 mm3	Vmag
Volume of all magnets	288000 mm3	VolumeMagnet
Remanent magnetic flux density	1.3 T	Br
Magnetic coercivity	1006580 A/m	Hc
Maximum Energy Product	342 KJ/m³	BHmax
Outer diameter	555.948 mm	Dout
Average radius	262.794 mm	Ravg
Inner radius	247.794 mm	Rin
Outer radius	277.974 mm	Rout
Effective outer radius	277.794 mm	Rout_eff
Mass of rotor disks	38.2088 kgr	BackIronMass
Volume of rotor disks	4854.99 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.807138 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	6	q
Total number of coils in stator	18	coil_num
Number of turns per coil	37	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	3	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	6.81 mm2	sc
Copper wire cross-sectional area (Calculated)	6.14438 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.79772 mm	dc_theor
Coil leg width	35.593 mm	wc
Average length of coil turn	191.567 mm	lavg
Stator nominal temperature	59.6674 C°	tc_real
Stator surface area	2454.64 cm²	stator_surface_area
Heat coefficient	0.202058	cq_real
Current density	5.41355 A	Jmax_real
Resistivity of copper at nominal temperature	1.94786E-8 Ohm.m	pt
Resistance of a single coil	0.0202737 Ohm	Rc
Phase resistance	0.121642 Ohm	Rphase
Phase inductance	0.000400876 H	Ls
Nagaoka constant	0.172885	Kn
Winding coefficient	0.95	kw
Volume of a single coil	88639.7 mm3	coil_volume
Weight of a single coil	454.852 g	coil_weight_constr
Coil hole at Ravg	20 mm	coil_hole_Ravg
Coil hole at Rin	14.8083 mm	coil_hole_Rin_constr
Coil hole at Rout	25.2738 mm	coil_hole_Rout_constr
Coil mass for construction	8.64219 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	16.6128 V	EMF_nom
Current at the nominal wind speed	36.8663 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	44.778 Hz	fnom
Generator power (Calculated)	1248.71 W	Pnom
Copper losses (Calculated)	495.979 W	Pcopper
Eddy current losses (Calculated)	48.4468 W	Peddy
Generator efficiency (Calculated)	0.686126	efficiency_real
AC Power at the rectifier (Calculated)	1123.84 W	Pnom_rect
DC Power at the batteries (Calculated)	1011.45 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)	26.8048 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	552.584 EUR	Totalcost
Total generator mass	52.0196 kgr	TotalMass
Total generator volume	14.3222 dm3	TotalVolume
Blade rotor mass	11.1482 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	221.247 EUR	Magcost
Magnet shipping cost	17.3913 EUR	shippingcost
Copper mass	7.76747 kgr	mcu
Cost of copper	114.648 EUR	coppercost
Resin mass	3.88337 kgr	resinmass
Cost of resin	53.6406 EUR	resincost
Resin volume	2855.42 cm3	ResinVolume
Total mass of one generator rotor	20.1844 kgr	TotalMassRotor
Cost of iron	46.9968 EUR	ironcost
Surface area of moulds	0.732647 m2	woodS
Total cost of moulds	116.051 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9248.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.80m

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 N42

Number of generator poles:

Magnet length:

30mm

Magnet width:

20mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

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