N35 small magnet | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by bvillas on Wed, 10/06/2020 - 12:23

Duration:

00:02:59

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)	922.281 RPM	n_nom
Nominal tip speed ratio	11.5839	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.107446	ai
Inner-to-outer magnet radius	0.893476	kd
Flux density in airgap	0.15877 T	Bmax
Flux density on magnet surface	0.452467 T	Bmg
First harmonic of flux density in airgap	0.0637222 T	Bp
Flux per pole (Calculated)	9.04423E-5 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	77.8339 mm	dist_magnet_Rin
Magnet mass	144 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	800 mm3	Vmag
Volume of all magnets	19200 mm3	VolumeMagnet
Remanent magnetic flux density	1.195 T	Br
Magnetic coercivity	918880 A/m	Hc
Maximum Energy Product	287 KJ/m³	BHmax
Outer diameter	375.634 mm	Dout
Average radius	177.75 mm	Ravg
Inner radius	167.75 mm	Rin
Outer radius	187.817 mm	Rout
Effective outer radius	187.75 mm	Rout_eff
Mass of rotor disks	17.4431 kgr	BackIronMass
Volume of rotor disks	2216.41 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.239593 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	16 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	429	Nc
Copper wire diameter	1.18 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	1.09 mm2	sc
Copper wire cross-sectional area (Calculated)	1.00174 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	1.09 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.12965 mm	dc_theor
Coil leg width	56.7652 mm	wc
Average length of coil turn	217.919 mm	lavg
Stator nominal temperature	73.408 C°	tc_real
Stator surface area	2226.64 cm²	stator_surface_area
Heat coefficient	0.26129	cq_real
Current density	5.51417 A	Jmax_real
Resistivity of copper at nominal temperature	2.08637E-8 Ohm.m	pt
Resistance of a single coil	1.78944 Ohm	Rc
Phase resistance	5.36832 Ohm	Rphase
Phase inductance	0.0253877 H	Ls
Nagaoka constant	0.154923	Kn
Winding coefficient	0.95	kw
Volume of a single coil	197924 mm3	coil_volume
Weight of a single coil	915.244 g	coil_weight_constr
Coil hole at Ravg	10 mm	coil_hole_Ravg
Coil hole at Rin	3.08152 mm	coil_hole_Rin_constr
Coil hole at Rout	17.0383 mm	coil_hole_Rout_constr
Coil mass for construction	9.15244 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	45.2879 V	EMF_nom
Current at the nominal wind speed	6.01045 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	92.2281 Hz	fnom
Generator power (Calculated)	203.581 W	Pnom
Copper losses (Calculated)	581.799 W	Pcopper
Eddy current losses (Calculated)	0.806824 W	Peddy
Generator efficiency (Calculated)	0.244818	efficiency_real
AC Power at the rectifier (Calculated)	183.223 W	Pnom_rect
DC Power at the batteries (Calculated)	164.901 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)	45.3743 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	281.316 EUR	Totalcost
Total generator mass	29.0244 kgr	TotalMass
Total generator volume	5.54102 dm3	TotalVolume
Blade rotor mass	3.30317 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	21.8066 EUR	Magcost
Magnet shipping cost	1.15942 EUR	shippingcost
Copper mass	8.19897 kgr	mcu
Cost of copper	121.017 EUR	coppercost
Resin mass	3.23831 kgr	resinmass
Cost of resin	44.7305 EUR	resincost
Resin volume	2381.11 cm3	ResinVolume
Total mass of one generator rotor	8.79356 kgr	TotalMassRotor
Cost of iron	21.455 EUR	ironcost
Surface area of moulds	0.456481 m2	woodS
Total cost of moulds	72.3066 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6414.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 N35

Number of generator poles:

Magnet length:

20mm

Magnet width:

10mm

Magnet thickness:

4mm

Rotor disk thickness:

Calculated

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

Calculated

Stator thickness:

Calculated

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