Pedalpower 6 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by minvayu on Fri, 21/02/2025 - 03:34

Duration:

00:01:21

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)	331.177 RPM	n_nom
Nominal tip speed ratio	6.23937	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.160458	ai
Inner-to-outer magnet radius	0.776162	kd
Flux density in airgap	0.618647 T	Bmax
Flux density on magnet surface	0.735034 T	Bmg
First harmonic of flux density in airgap	0.208962 T	Bp
Flux per pole (Calculated)	0.000921202 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	111.169 mm	dist_magnet_Rin
Magnet mass	1500 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	12500 mm3	Vmag
Volume of all magnets	200000 mm3	VolumeMagnet
Remanent magnetic flux density	1.45 T	Br
Magnetic coercivity	1120020 A/m	Hc
Maximum Energy Product	422 KJ/m³	BHmax
Outer diameter	447.451 mm	Dout
Average radius	198.376 mm	Ravg
Inner radius	173.376 mm	Rin
Outer radius	223.725 mm	Rout
Effective outer radius	223.376 mm	Rout_eff
Mass of rotor disks	24.7505 kgr	BackIronMass
Volume of rotor disks	3144.92 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.08159 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	142	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	4.54 mm2	sc
Copper wire cross-sectional area (Calculated)	4.189 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.31004 mm	dc_theor
Coil leg width	91.0667 mm	wc
Average length of coil turn	406.542 mm	lavg
Stator nominal temperature	62.0653 C°	tc_real
Stator surface area	4442.69 cm²	stator_surface_area
Heat coefficient	0.212897	cq_real
Current density	5.53612 A	Jmax_real
Resistivity of copper at nominal temperature	1.96248E-8 Ohm.m	pt
Resistance of a single coil	0.249542 Ohm	Rc
Phase resistance	0.499083 Ohm	Rphase
Phase inductance	0.00433982 H	Ls
Nagaoka constant	0.0846443	Kn
Winding coefficient	0.95	kw
Volume of a single coil	481292 mm3	coil_volume
Weight of a single coil	2376.08 g	coil_weight_constr
Coil hole at Ravg	25 mm	coil_hole_Ravg
Coil hole at Rin	-1.07466 mm	coil_hole_Rin_constr
Coil hole at Rout	51.1727 mm	coil_hole_Rout_constr
Coil mass for construction	16.6326 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	24.3674 V	EMF_nom
Current at the nominal wind speed	25.134 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	22.0785 Hz	fnom
Generator power (Calculated)	851.318 W	Pnom
Copper losses (Calculated)	945.837 W	Pcopper
Eddy current losses (Calculated)	5.09937 W	Peddy
Generator efficiency (Calculated)	0.464553	efficiency_real
AC Power at the rectifier (Calculated)	766.186 W	Pnom_rect
DC Power at the batteries (Calculated)	689.568 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)	30.2982 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	560.731 EUR	Totalcost
Total generator mass	44.791 kgr	TotalMass
Total generator volume	9.27752 dm3	TotalVolume
Blade rotor mass	11.1482 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	172.38 EUR	Magcost
Magnet shipping cost	12.0773 EUR	shippingcost
Copper mass	14.0585 kgr	mcu
Cost of copper	207.503 EUR	coppercost
Resin mass	4.48193 kgr	resinmass
Cost of resin	61.9085 EUR	resincost
Resin volume	3295.54 cm3	ResinVolume
Total mass of one generator rotor	13.1253 kgr	TotalMassRotor
Cost of iron	30.4432 EUR	ironcost
Surface area of moulds	0.558682 m2	woodS
Total cost of moulds	88.4953 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-9678.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 N52

Number of generator poles:

Magnet length:

50mm

Magnet width:

25mm

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