Fe magnets | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by bvillas on Wed, 10/06/2020 - 13:36

Duration:

00:01:18

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)	696.977 RPM	n_nom
Nominal tip speed ratio	8.75403	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.122776	ai
Inner-to-outer magnet radius	0.904199	kd
Flux density in airgap	0.134769 T	Bmax
Flux density on magnet surface	0.162575 T	Bmg
First harmonic of flux density in airgap	0.0355081 T	Bp
Flux per pole (Calculated)	0.00013467 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	154.909 mm	dist_magnet_Rin
Magnet mass	794.88 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	6624 mm3	Vmag
Volume of all magnets	158976 mm3	VolumeMagnet
Remanent magnetic flux density	0.39 T	Br
Magnetic coercivity	227950 A/m	Hc
Maximum Energy Product	30 KJ/m³	BHmax
Outer diameter	751.913 mm	Dout
Average radius	357.78 mm	Ravg
Inner radius	339.78 mm	Rin
Outer radius	375.956 mm	Rout
Effective outer radius	375.78 mm	Rout_eff
Mass of rotor disks	69.8923 kgr	BackIronMass
Volume of rotor disks	8880.85 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.222202 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	14 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	288	Nc
Copper wire diameter	1.9 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	2.83 mm2	sc
Copper wire cross-sectional area (Calculated)	2.65214 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.83 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.83807 mm	dc_theor
Coil leg width	113.076 mm	wc
Average length of coil turn	429.229 mm	lavg
Stator nominal temperature	31.5281 C°	tc_real
Stator surface area	8736.36 cm²	stator_surface_area
Heat coefficient	0.0499634	cq_real
Current density	2.81145 A	Jmax_real
Resistivity of copper at nominal temperature	1.75392E-8 Ohm.m	pt
Resistance of a single coil	0.766136 Ohm	Rc
Phase resistance	2.29841 Ohm	Rphase
Phase inductance	0.0257723 H	Ls
Nagaoka constant	0.0787041	Kn
Winding coefficient	0.95	kw
Volume of a single coil	679494 mm3	coil_volume
Weight of a single coil	3149.28 g	coil_weight_constr
Coil hole at Ravg	23 mm	coil_hole_Ravg
Coil hole at Rin	10.5598 mm	coil_hole_Rin_constr
Coil hole at Rout	35.6796 mm	coil_hole_Rout_constr
Coil mass for construction	31.4928 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	34.2114 V	EMF_nom
Current at the nominal wind speed	7.95641 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	69.6977 Hz	fnom
Generator power (Calculated)	269.493 W	Pnom
Copper losses (Calculated)	436.498 W	Pcopper
Eddy current losses (Calculated)	1.44156 W	Peddy
Generator efficiency (Calculated)	0.330366	efficiency_real
AC Power at the rectifier (Calculated)	242.544 W	Pnom_rect
DC Power at the batteries (Calculated)	218.29 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)	108.309 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	814.011 EUR	Totalcost
Total generator mass	107.252 kgr	TotalMass
Total generator volume	23.9783 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	21.0418 EUR	Magcost
Magnet shipping cost	9.6 EUR	shippingcost
Copper mass	28.148 kgr	mcu
Cost of copper	415.465 EUR	coppercost
Resin mass	8.41707 kgr	resinmass
Cost of resin	116.264 EUR	resincost
Resin volume	6189.03 cm3	ResinVolume
Total mass of one generator rotor	35.3436 kgr	TotalMassRotor
Cost of iron	85.9675 EUR	ironcost
Surface area of moulds	1.10652 m2	woodS
Total cost of moulds	175.273 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6415.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:

Ferrite C8

Number of generator poles:

Magnet length:

36mm

Magnet width:

23mm

Magnet thickness:

8mm

Rotor disk thickness:

Calculated

Mechanical clearance:

2.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

3.00A/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