4.2F 48V 615mm disk | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Kostas on Fri, 21/10/2022 - 21:49

Duration:

00:00:32

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	119.427 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	211.089 RPM	n_nom
Nominal tip speed ratio	4.63974	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	6 mm	hr
Magnet width-to-pole pitch ratio	0.827609	ai
Inner-to-outer magnet radius	0.755485	kd
Flux density in airgap	0.237878 T	Bmax
Flux density on magnet surface	0.234191 T	Bmg
First harmonic of flux density in airgap	0.254491 T	Bp
Flux per pole (Calculated)	0.0008836 Wb	Flux_pole
Magnets on a rotor disk	28	magnet_num
Distance between magnets	2 mm	dist_magnet_Rin
Magnet mass	21000 g	MagnetMass
Magnet density	5 g/cm3	mag_density
Volume of a single magnet	75000 mm3	Vmag
Volume of all magnets	4200000 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	615.493 mm	Dout
Average radius	269.23 mm	Ravg
Inner radius	231.73 mm	Rin
Outer radius	307.747 mm	Rout
Effective outer radius	306.73 mm	Rout_eff
Mass of rotor disks	28.0991 kgr	BackIronMass
Volume of rotor disks	3570.41 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.25095 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	7	q
Total number of coils in stator	21	coil_num
Number of turns per coil	37	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	4.54 mm2	sc
Copper wire cross-sectional area (Calculated)	4.1093 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.28796 mm	dc_theor
Coil leg width	23.4937 mm	wc
Average length of coil turn	269.507 mm	lavg
Stator nominal temperature	61.3329 C°	tc_real
Stator surface area	2659.32 cm²	stator_surface_area
Heat coefficient	0.209612	cq_real
Current density	5.43079 A	Jmax_real
Resistivity of copper at nominal temperature	1.98798E-8 Ohm.m	pt
Resistance of a single coil	0.0436645 Ohm	Rc
Phase resistance	0.305651 Ohm	Rphase
Phase inductance	0.000945499 H	Ls
Nagaoka constant	0.176589	Kn
Winding coefficient	0.720496	kw
Volume of a single coil	82312.2 mm3	coil_volume
Weight of a single coil	426.606 g	coil_weight_constr
Coil hole at Ravg	29 mm	coil_hole_Ravg
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	50 mm	coil_hole_Rout_constr
Coil mass for construction	9.38534 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	36.064 V	EMF_nom
Current at the nominal wind speed	24.6558 A	Iac_nom
Terminal voltage at the nominal wind speed	27.0499 V	V_term_line
Nominal frequency	49.2542 Hz	fnom
Generator power (Calculated)	2000.81 W	Pnom
Copper losses (Calculated)	557.424 W	Pcopper
Eddy current losses (Calculated)	48.9165 W	Peddy
Generator efficiency (Calculated)	0.758206	efficiency_real
AC Power at the rectifier (Calculated)	1800.73 W	Pnom_rect
DC Power at the batteries (Calculated)	1620.66 W	Pnom_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	5	No_bolts_hub
Mass of bearing hub	8344.46 g	BearingHubMass
Rotational losses (Calculated)	31.7253 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	637.377 EUR	Totalcost
Total generator mass	59.4804 kgr	TotalMass
Total generator volume	20.5299 dm3	TotalVolume
Blade rotor mass	17.7029 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	318.611 EUR	Magcost
Magnet shipping cost	253.623 EUR	shippingcost
Copper mass	8.49931 kgr	mcu
Cost of copper	125.45 EUR	coppercost
Resin mass	1.88192 kgr	resinmass
Cost of resin	25.9948 EUR	resincost
Resin volume	1383.77 cm3	ResinVolume
Total mass of one generator rotor	24.5496 kgr	TotalMassRotor
Cost of iron	34.5619 EUR	ironcost
Surface area of moulds	0.838128 m2	woodS
Total cost of moulds	132.76 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-7567.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

2.10m

Aerodynamic coefficient:

0.32

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:

75mm

Magnet width:

50mm

Magnet thickness:

20mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

6mm

Mechanical clearance:

2.00mm

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:

48.00V

Nominal voltage:

57.50V

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