Smaller MWT / OD 50 x ID 25 x Thick 20 / Ferrite Ring / Stacked x2 10 mm / Simulated as 50x50x20 rectangular / 24V / Actual 12V | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Kostas on Sun, 16/02/2025 - 12:10

Duration:

00:01:03

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	358.28 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	870.376 RPM	n_nom
Nominal tip speed ratio	5.46596	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	6 mm	hr
Magnet width-to-pole pitch ratio	0.712911	ai
Inner-to-outer magnet radius	0.562549	kd
Flux density in airgap	0.228303 T	Bmax
Flux density on magnet surface	0.228499 T	Bmg
First harmonic of flux density in airgap	0.232798 T	Bp
Flux per pole (Calculated)	0.000598272 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	0.5 mm	dist_magnet_Rin
Magnet mass	4000 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	50000 mm3	Vmag
Volume of all magnets	800000 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	234.001 mm	Dout
Average radius	89.2986 mm	Ravg
Inner radius	64.2986 mm	Rin
Outer radius	117.001 mm	Rout
Effective outer radius	114.299 mm	Rout_eff
Mass of rotor disks	4.06147 kgr	BackIronMass
Volume of rotor disks	516.07 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.17543 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	2	q
Total number of coils in stator	6	coil_num
Number of turns per coil	133	Nc
Copper wire diameter	0.8 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.5 mm2	sc
Copper wire cross-sectional area (Calculated)	0.448263 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	0.5 mm²	sc_multi_wires
Copper wire diameter (Calculated)	0.755669 mm	dc_theor
Coil leg width	9.3007 mm	wc
Average length of coil turn	246.627 mm	lavg
Stator nominal temperature	101.792 C°	tc_real
Stator surface area	275.256 cm²	stator_surface_area
Heat coefficient	0.366953	cq_real
Current density	6.72394 A	Jmax_real
Resistivity of copper at nominal temperature	2.27032E-8 Ohm.m	pt
Resistance of a single coil	1.48939 Ohm	Rc
Phase resistance	2.97878 Ohm	Rphase
Phase inductance	0.00376693 H	Ls
Nagaoka constant	0.227571	Kn
Winding coefficient	0.6088	kw
Volume of a single coil	29819.4 mm3	coil_volume
Weight of a single coil	148.827 g	coil_weight_constr
Coil hole at Ravg	29 mm	coil_hole_Ravg
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	50 mm	coil_hole_Rout_constr
Coil mass for construction	1.04179 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	24.9641 V	EMF_nom
Current at the nominal wind speed	3.36197 A	Iac_nom
Terminal voltage at the nominal wind speed	12.3339 V	V_term_line
Nominal frequency	58.025 Hz	fnom
Generator power (Calculated)	124.399 W	Pnom
Copper losses (Calculated)	101.006 W	Pcopper
Eddy current losses (Calculated)	0.405285 W	Peddy
Generator efficiency (Calculated)	0.503603	efficiency_real
AC Power at the rectifier (Calculated)	120.667 W	Pnom_rect
DC Power at the batteries (Calculated)	108.6 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)	21.2076 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	139.397 EUR	Totalcost
Total generator mass	9.9092 kgr	TotalMass
Total generator volume	3.05341 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	62.8772 EUR	Magcost
Magnet shipping cost	48.3092 EUR	shippingcost
Copper mass	0.879732 kgr	mcu
Cost of copper	12.9848 EUR	coppercost
Resin mass	0.967998 kgr	resinmass
Cost of resin	13.3709 EUR	resincost
Resin volume	711.763 cm3	ResinVolume
Total mass of one generator rotor	4.03073 kgr	TotalMassRotor
Cost of iron	4.9956 EUR	ironcost
Surface area of moulds	0.285158 m2	woodS
Total cost of moulds	45.169 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9628.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Aerodynamic coefficient:

0.37

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

7.50

Design TSR:

7.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

Ferrite C8

Number of generator poles:

Magnet length:

50mm

Magnet width:

50mm

Magnet thickness:

20mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

6mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

13mm

Current density:

7.50A/mm2

System Inputs

System voltage:

24.00V

Nominal voltage:

28.00V

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