Star Shape 24 pole | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by gbroques on Sat, 21/12/2024 - 22:44

Duration:

00:00:59

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	83.5987 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	140.507 RPM	n_nom
Nominal tip speed ratio	4.41192	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.263921	ai
Inner-to-outer magnet radius	0.861829	kd
Flux density in airgap	0.517266 T	Bmax
Flux density on magnet surface	0.622576 T	Bmg
First harmonic of flux density in airgap	0.276157 T	Bp
Flux per pole (Calculated)	0.000975468 Wb	Flux_pole
Magnets on a rotor disk	24	magnet_num
Distance between magnets	67.711 mm	dist_magnet_Rin
Magnet mass	5637.6 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	15660 mm3	Vmag
Volume of all magnets	751680 mm3	VolumeMagnet
Remanent magnetic flux density	1.265 T	Br
Magnetic coercivity	982324 A/m	Hc
Maximum Energy Product	326 KJ/m³	BHmax
Outer diameter	839.973 mm	Dout
Average radius	390.769 mm	Ravg
Inner radius	361.769 mm	Rin
Outer radius	419.987 mm	Rout
Effective outer radius	419.769 mm	Rout_eff
Mass of rotor disks	87.2219 kgr	BackIronMass
Volume of rotor disks	11082.8 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.986488 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	15 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	25	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	7	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	17.78 mm2	sc
Copper wire cross-sectional area (Calculated)	16.3462 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	4.56324 mm	dc_theor
Coil leg width	54.4176 mm	wc
Average length of coil turn	313.04 mm	lavg
Stator nominal temperature	71.1128 C°	tc_real
Stator surface area	6132.55 cm²	stator_surface_area
Heat coefficient	0.251847	cq_real
Current density	5.51616 A	Jmax_real
Resistivity of copper at nominal temperature	2.02657E-8 Ohm.m	pt
Resistance of a single coil	0.00892007 Ohm	Rc
Phase resistance	0.0535204 Ohm	Rphase
Phase inductance	0.000331678 H	Ls
Nagaoka constant	0.135387	Kn
Winding coefficient	0.95	kw
Volume of a single coil	255523 mm3	coil_volume
Weight of a single coil	1343.48 g	coil_weight_constr
Coil hole at Ravg	27 mm	coil_hole_Ravg
Coil hole at Rin	16.9447 mm	coil_hole_Rin_constr
Coil hole at Rout	37.1799 mm	coil_hole_Rout_constr
Coil mass for construction	25.5262 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	17.346 V	EMF_nom
Current at the nominal wind speed	98.0772 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	28.1014 Hz	fnom
Generator power (Calculated)	3322 W	Pnom
Copper losses (Calculated)	1544.46 W	Pcopper
Eddy current losses (Calculated)	130.347 W	Peddy
Generator efficiency (Calculated)	0.658941	efficiency_real
AC Power at the rectifier (Calculated)	2989.8 W	Pnom_rect
DC Power at the batteries (Calculated)	2690.82 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	6	No_bolts_hub
Mass of bearing hub	14290.7 g	BearingHubMass
Rotational losses (Calculated)	44.6144 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	1300.19 EUR	Totalcost
Total generator mass	125.136 kgr	TotalMass
Total generator volume	33.8026 dm3	TotalVolume
Blade rotor mass	51.6121 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	520.023 EUR	Magcost
Magnet shipping cost	45.3913 EUR	shippingcost
Copper mass	22.3914 kgr	mcu
Cost of copper	330.497 EUR	coppercost
Resin mass	9.88518 kgr	resinmass
Cost of resin	136.543 EUR	resincost
Resin volume	7268.52 cm3	ResinVolume
Total mass of one generator rotor	46.4297 kgr	TotalMassRotor
Cost of iron	107.283 EUR	ironcost
Surface area of moulds	1.29954 m2	woodS
Total cost of moulds	205.847 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9568.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

3.00m

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 N40

Number of generator poles:

Magnet length:

58mm

Magnet width:

27mm

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:

15mm

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