Clone of 3.6m 30x20x10 N40 28 pole - Keyhole instead of rectangular coils | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by gbroques on Wed, 07/08/2024 - 01:59

Duration:

00:00:29

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)	209.508 RPM	n_nom
Nominal tip speed ratio	3.94713	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.358384	ai
Inner-to-outer magnet radius	0.88623	kd
Flux density in airgap	0.490415 T	Bmax
Flux density on magnet surface	0.643917 T	Bmg
First harmonic of flux density in airgap	0.358267 T	Bp
Flux per pole (Calculated)	0.00038671 Wb	Flux_pole
Magnets on a rotor disk	28	magnet_num
Distance between magnets	32.4401 mm	dist_magnet_Rin
Magnet mass	2520 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	6000 mm3	Vmag
Volume of all magnets	336000 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	527.761 mm	Dout
Average radius	248.691 mm	Ravg
Inner radius	233.691 mm	Rin
Outer radius	263.88 mm	Rout
Effective outer radius	263.691 mm	Rout_eff
Mass of rotor disks	34.4325 kgr	BackIronMass
Volume of rotor disks	4375.16 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.78838 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	7	q
Total number of coils in stator	21	coil_num
Number of turns per coil	28	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)	6.53029 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.88424 mm	dc_theor
Coil leg width	26.9352 mm	wc
Average length of coil turn	166.864 mm	lavg
Stator nominal temperature	65.5724 C°	tc_real
Stator surface area	1887.7 cm²	stator_surface_area
Heat coefficient	0.228343	cq_real
Current density	5.75356 A	Jmax_real
Resistivity of copper at nominal temperature	1.94876E-8 Ohm.m	pt
Resistance of a single coil	0.01337 Ohm	Rc
Phase resistance	0.0935903 Ohm	Rphase
Phase inductance	0.00023971 H	Ls
Nagaoka constant	0.203933	Kn
Winding coefficient	0.95	kw
Volume of a single coil	58428.8 mm3	coil_volume
Weight of a single coil	304.768 g	coil_weight_constr
Coil hole at Ravg	20 mm	coil_hole_Ravg
Coil hole at Rin	15.5469 mm	coil_hole_Rin_constr
Coil hole at Rout	24.5169 mm	coil_hole_Rout_constr
Coil mass for construction	6.70489 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	15.631 V	EMF_nom
Current at the nominal wind speed	39.1818 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	48.8852 Hz	fnom
Generator power (Calculated)	1327.13 W	Pnom
Copper losses (Calculated)	431.043 W	Pcopper
Eddy current losses (Calculated)	74.472 W	Peddy
Generator efficiency (Calculated)	0.714935	efficiency_real
AC Power at the rectifier (Calculated)	1194.42 W	Pnom_rect
DC Power at the batteries (Calculated)	1074.98 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)	23.6515 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	536.909 EUR	Totalcost
Total generator mass	46.4106 kgr	TotalMass
Total generator volume	12.9067 dm3	TotalVolume
Blade rotor mass	11.1482 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	249.722 EUR	Magcost
Magnet shipping cost	20.2899 EUR	shippingcost
Copper mass	5.97345 kgr	mcu
Cost of copper	88.1681 EUR	coppercost
Resin mass	3.48463 kgr	resinmass
Cost of resin	48.1329 EUR	resincost
Resin volume	2562.23 cm3	ResinVolume
Total mass of one generator rotor	18.4763 kgr	TotalMassRotor
Cost of iron	42.352 EUR	ironcost
Surface area of moulds	0.685188 m2	woodS
Total cost of moulds	108.534 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9246.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 N40

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