1 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by sjd.aliyan on Tue, 07/08/2018 - 01:46

Duration:

00:02:13

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	208.997 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	557.325 RPM	n_nom
Nominal tip speed ratio	7	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.774971	ai
Inner-to-outer magnet radius	0.662667	kd
Flux density in airgap	0.951551 T	Bmax
Flux density on magnet surface	0.921957 T	Bmg
First harmonic of flux density in airgap	1.0098 T	Bp
Flux per pole (Calculated)	0.00464375 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	2 mm	dist_magnet_Rin
Magnet mass	26460 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	147000 mm3	Vmag
Volume of all magnets	3528000 mm3	VolumeMagnet
Remanent magnetic flux density	1.3 T	Br
Magnetic coercivity	1006580 A/m	Hc
Maximum Energy Product	342 KJ/m³	BHmax
Outer diameter	420.882 mm	Dout
Average radius	172.51 mm	Ravg
Inner radius	137.51 mm	Rin
Outer radius	210.441 mm	Rout
Effective outer radius	207.51 mm	Rout_eff
Mass of rotor disks	21.8985 kgr	BackIronMass
Volume of rotor disks	2782.53 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	3.78607 T	SaturMAX
Is the magnet rotor disk saturated?	Yes	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 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	85	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)	0.276249 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	0.4 mm²	sc_multi_wires
Copper wire diameter (Calculated)	0.59322 mm	dc_theor
Coil leg width	4.75524 mm	wc
Average length of coil turn	323.269 mm	lavg
Stator nominal temperature	41.7162 C°	tc_real
Stator surface area	276.7 cm²	stator_surface_area
Heat coefficient	0.111733	cq_real
Current density	4.14373 A	Jmax_real
Resistivity of copper at nominal temperature	1.82021E-8 Ohm.m	pt
Resistance of a single coil	1.25039 Ohm	Rc
Phase resistance	3.75116 Ohm	Rphase
Phase inductance	0.0035568 H	Ls
Nagaoka constant	0.204134	Kn
Winding coefficient	0.558824	kw
Volume of a single coil	19983.9 mm3	coil_volume
Weight of a single coil	100.573 g	coil_weight_constr
Coil hole at Ravg	39 mm	coil_hole_Ravg
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	70 mm	coil_hole_Rout_constr
Coil mass for construction	1.00573 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	61.584 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	164.224 V	EMF_nom
Current at the nominal wind speed	1.65749 A	Iac_nom
Terminal voltage at the nominal wind speed	67.7424 V	V_term_line
Nominal frequency	55.7325 Hz	fnom
Generator power (Calculated)	720.915 W	Pnom
Copper losses (Calculated)	30.9165 W	Pcopper
Eddy current losses (Calculated)	4.47245 W	Peddy
Generator efficiency (Calculated)	0.88129	efficiency_real
AC Power at the rectifier (Calculated)	648.823 W	Pnom_rect
DC Power at the batteries (Calculated)	583.941 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)	61.7185 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	2536.04 EUR	Totalcost
Total generator mass	49.6602 kgr	TotalMass
Total generator volume	13.7735 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	2407.98 EUR	Magcost
Magnet shipping cost	213.043 EUR	shippingcost
Copper mass	0.884348 kgr	mcu
Cost of copper	13.053 EUR	coppercost
Resin mass	0.417332 kgr	resinmass
Cost of resin	5.76457 EUR	resincost
Resin volume	306.862 cm3	ResinVolume
Total mass of one generator rotor	24.1793 kgr	TotalMassRotor
Cost of iron	26.9352 EUR	ironcost
Surface area of moulds	0.51967 m2	woodS
Total cost of moulds	82.3158 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-842.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.20m

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 N42

Number of generator poles:

Magnet length:

70mm

Magnet width:

70mm

Magnet thickness:

30mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

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:

6.00A/mm2

System Inputs

System voltage:

144.00V

Nominal voltage:

144.00V

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