First | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by microlens on Sat, 07/04/2018 - 20:54

Duration:

00:01:17

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	417.994 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	919455 RPM	n_nom
Nominal tip speed ratio	9623.62	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.049274	ai
Inner-to-outer magnet radius	0.974529	kd
Flux density in airgap	0.340481 T	Bmax
Flux density on magnet surface	0.73198 T	Bmg
First harmonic of flux density in airgap	0.0746211 T	Bp
Flux per pole (Calculated)	1.82932E-5 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	95.1644 mm	dist_magnet_Rin
Magnet mass	45 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	250 mm3	Vmag
Volume of all magnets	6000 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	392.632 mm	Dout
Average radius	193.8 mm	Ravg
Inner radius	191.3 mm	Rin
Outer radius	196.316 mm	Rout
Effective outer radius	196.3 mm	Rout_eff
Mass of rotor disks	19.0575 kgr	BackIronMass
Volume of rotor disks	2421.53 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.260961 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	6 mm	tw
Number of phases	3	nphase
Number of coils per phase	3	q
Total number of coils in stator	9	coil_num
Number of turns per coil	530	Nc
Copper wire diameter	0.71 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.4 mm2	sc
Copper wire cross-sectional area (Calculated)	0.000217143 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	0.4 mm²	sc_multi_wires
Copper wire diameter (Calculated)	0.0166318 mm	dc_theor
Coil leg width	64.2424 mm	wc
Average length of coil turn	221.721 mm	lavg
Stator nominal temperature	24.528 C°	tc_real
Stator surface area	2563.9 cm²	stator_surface_area
Heat coefficient	2.98923E-8	cq_real
Current density	0.00325715 A	Jmax_real
Resistivity of copper at nominal temperature	1.70766E-8 Ohm.m	pt
Resistance of a single coil	5.01676 Ohm	Rc
Phase resistance	15.0503 Ohm	Rphase
Phase inductance	0.0435078 H	Ls
Nagaoka constant	0.0630131	Kn
Winding coefficient	0.95	kw
Volume of a single coil	85463.4 mm3	coil_volume
Weight of a single coil	421.81 g	coil_weight_constr
Coil hole at Ravg	5 mm	coil_hole_Ravg
Coil hole at Rin	5 mm	coil_hole_Rin_constr
Coil hole at Rout	5 mm	coil_hole_Rout_constr
Coil mass for construction	4.2181 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	11282 V	EMF_nom
Current at the nominal wind speed	0.00130286 A	Iac_nom
Terminal voltage at the nominal wind speed	5.6452 V	V_term_line
Nominal frequency	91945.5 Hz	fnom
Generator power (Calculated)	0.0220647 W	Pnom
Copper losses (Calculated)	7.6641E-5 W	Pcopper
Eddy current losses (Calculated)	0.0194977 W	Peddy
Generator efficiency (Calculated)	5.16654E-7	efficiency_real
AC Power at the rectifier (Calculated)	0.0198582 W	Pnom_rect
DC Power at the batteries (Calculated)	0.0178724 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)	42706.9 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	184.776 EUR	Totalcost
Total generator mass	23.8664 kgr	TotalMass
Total generator volume	6.05384 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	15.9593 EUR	Magcost
Magnet shipping cost	0.362319 EUR	shippingcost
Copper mass	3.78201 kgr	mcu
Cost of copper	55.8225 EUR	coppercost
Resin mass	0.98191 kgr	resinmass
Cost of resin	13.563 EUR	resincost
Resin volume	721.992 cm3	ResinVolume
Total mass of one generator rotor	9.55124 kgr	TotalMassRotor
Cost of iron	23.4407 EUR	ironcost
Surface area of moulds	0.479739 m2	woodS
Total cost of moulds	75.9906 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-531.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

6.00m/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:

5mm

Magnet width:

5mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

2.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

6mm

Current density:

6.00A/mm2

System Inputs

System voltage:

12.00V

Nominal voltage:

12.00V

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