6m N45 75x25x15 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Kostas on Thu, 29/03/2018 - 09:46

Duration:

00:00:49

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)	118.082 RPM	n_nom
Nominal tip speed ratio	3.70779	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	12 mm	hr
Magnet width-to-pole pitch ratio	0.423528	ai
Inner-to-outer magnet radius	0.77819	kd
Flux density in airgap	0.605935 T	Bmax
Flux density on magnet surface	0.744086 T	Bmg
First harmonic of flux density in airgap	0.486294 T	Bp
Flux per pole (Calculated)	0.00139636 Wb	Flux_pole
Magnets on a rotor disk	32	magnet_num
Distance between magnets	26.6649 mm	dist_magnet_Rin
Magnet mass	13500 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	28125 mm3	Vmag
Volume of all magnets	1800000 mm3	VolumeMagnet
Remanent magnetic flux density	1.35 T	Br
Magnetic coercivity	1041910 A/m	Hc
Maximum Energy Product	366 KJ/m³	BHmax
Outer diameter	676.716 mm	Dout
Average radius	300.627 mm	Ravg
Inner radius	263.127 mm	Rin
Outer radius	338.358 mm	Rout
Effective outer radius	338.127 mm	Rout_eff
Mass of rotor disks	67.9342 kgr	BackIronMass
Volume of rotor disks	8632.05 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.975566 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	8	q
Total number of coils in stator	24	coil_num
Number of turns per coil	20	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	4	No_wires_at_hand
Winding fill factor	0.46	kf
Copper wire cross-sectional area	9.08 mm2	sc
Copper wire cross-sectional area (Calculated)	8.18901 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	3.22984 mm	dc_theor
Coil leg width	26.582 mm	wc
Average length of coil turn	266.076 mm	lavg
Stator nominal temperature	78.895 C°	tc_real
Stator surface area	3394.96 cm²	stator_surface_area
Heat coefficient	0.283236	cq_real
Current density	6.31311 A	Jmax_real
Resistivity of copper at nominal temperature	2.08048E-8 Ohm.m	pt
Resistance of a single coil	0.0121931 Ohm	Rc
Phase resistance	0.0975448 Ohm	Rphase
Phase inductance	0.000288764 H	Ls
Nagaoka constant	0.191194	Kn
Winding coefficient	0.95	kw
Volume of a single coil	106093 mm3	coil_volume
Weight of a single coil	475.173 g	coil_weight_constr
Coil hole at Ravg	25 mm	coil_hole_Ravg
Coil hole at Rin	15.2203 mm	coil_hole_Rin_constr
Coil hole at Rout	34.842 mm	coil_hole_Rout_constr
Coil mass for construction	11.8793 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	29.6783 V	EMF_nom
Current at the nominal wind speed	57.3231 A	Iac_nom
Terminal voltage at the nominal wind speed	22.5808 V	V_term_line
Nominal frequency	31.4886 Hz	fnom
Generator power (Calculated)	3883.2 W	Pnom
Copper losses (Calculated)	961.577 W	Pcopper
Eddy current losses (Calculated)	171.13 W	Peddy
Generator efficiency (Calculated)	0.768844	efficiency_real
AC Power at the rectifier (Calculated)	3494.88 W	Pnom_rect
DC Power at the batteries (Calculated)	3145.4 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)	34.7958 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	1826.22 EUR	Totalcost
Total generator mass	98.8491 kgr	TotalMass
Total generator volume	26.9752 dm3	TotalVolume
Blade rotor mass	51.6121 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	1341.18 EUR	Magcost
Magnet shipping cost	108.696 EUR	shippingcost
Copper mass	10.3674 kgr	mcu
Cost of copper	153.023 EUR	coppercost
Resin mass	7.04747 kgr	resinmass
Cost of resin	97.346 EUR	resincost
Resin volume	5181.96 cm3	ResinVolume
Total mass of one generator rotor	40.7171 kgr	TotalMassRotor
Cost of iron	83.5591 EUR	ironcost
Surface area of moulds	0.953974 m2	woodS
Total cost of moulds	151.109 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-482.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 N45

Number of generator poles:

Magnet length:

75mm

Magnet width:

25mm

Magnet thickness:

15mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

12mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

User defined

Stator thickness:

15mm

Current density:

7.00A/mm2

System Inputs

System voltage:

48.00V

Nominal voltage:

48.00V

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