72 V tri | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by misiekp16 on Thu, 09/08/2018 - 10:48

Duration:

00:00:22

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	179.14 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	245.914 RPM	n_nom
Nominal tip speed ratio	3.60346	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.681156	ai
Inner-to-outer magnet radius	0.570557	kd
Flux density in airgap	0.54 T	Bmax
Flux density on magnet surface	0.62 T	Bmg
First harmonic of flux density in airgap	0.4 T	Bp
Flux per pole (Calculated)	0.0008556 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	2 mm	dist_magnet_Rin
Magnet mass	2484 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	331200 mm3	VolumeMagnet
Remanent magnetic flux density	1.265 T	Br
Magnetic coercivity	982324 A/m	Hc
Maximum Energy Product	326 KJ/m³	BHmax
Outer diameter	216.321 mm	Dout
Average radius	84.1155 mm	Ravg
Inner radius	61.1155 mm	Rin
Outer radius	108.161 mm	Rout
Effective outer radius	107.115 mm	Rout_eff
Mass of rotor disks	5.78487 kgr	BackIronMass
Volume of rotor disks	735.053 cm3	BackIronVolume

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	159	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.52	kf
Copper wire cross-sectional area	2.27 mm2	sc
Copper wire cross-sectional area (Calculated)	2.18767 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.66938 mm	dc_theor
Coil leg width	53.392 mm	wc
Average length of coil turn	183.847 mm	lavg
Stator nominal temperature	67.4442 C°	tc_real
Stator surface area	1766.88 cm²	stator_surface_area
Heat coefficient	0.236401	cq_real
Current density	5.78238 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.269369 Ohm	Rc
Phase resistance	0.808107 Ohm	Rphase
Phase inductance	0.00279325 H	Ls
Nagaoka constant	0.141652	Kn
Winding coefficient	0.95	kw
Volume of a single coil	127608 mm3	coil_volume
Weight of a single coil	600.685 g	coil_weight_constr
Coil hole at Ravg	19 mm	coil_hole_Ravg
Coil hole at Rin	8 mm	coil_hole_Rin_constr
Coil hole at Rout	30 mm	coil_hole_Rout_constr
Coil mass for construction	6.00685 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	30.792 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	42.339 V	EMF_nom
Current at the nominal wind speed	13.126 A	Iac_nom
Terminal voltage at the nominal wind speed	33.8712 V	V_term_line
Nominal frequency	24.5914 Hz	fnom
Generator power (Calculated)	1333.78 W	Pnom
Copper losses (Calculated)	417.691 W	Pcopper
Eddy current losses (Calculated)	9.16534 W	Peddy
Generator efficiency (Calculated)	0.753929	efficiency_real
AC Power at the rectifier (Calculated)	1200.4 W	Pnom_rect
DC Power at the batteries (Calculated)	1080.36 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)	8.47067 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	370.493 EUR	Totalcost
Total generator mass	14.4616 kgr	TotalMass
Total generator volume	2.16841 dm3	TotalVolume
Blade rotor mass	5.24532 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	230.554 EUR	Magcost
Magnet shipping cost	20 EUR	shippingcost
Copper mass	5.33901 kgr	mcu
Cost of copper	78.8037 EUR	coppercost
Resin mass	0.853707 kgr	resinmass
Cost of resin	11.7922 EUR	resincost
Resin volume	627.726 cm3	ResinVolume
Total mass of one generator rotor	4.13443 kgr	TotalMassRotor
Cost of iron	7.11539 EUR	ironcost
Surface area of moulds	0.266588 m2	woodS
Total cost of moulds	42.2275 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-844.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.40m

Aerodynamic coefficient:

0.45

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 N40

Number of generator poles:

Magnet length:

46mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

Calculated

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Triangular

Winder bolt size:

8.00mm

Winding fill factor:

Calculated

Stator thickness:

Calculated

Current density:

6.00A/mm2

System Inputs

System voltage:

72.00V

Nominal voltage:

72.00V

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:

true

Simulation step:

Current step:

RPM Step:

Mesh size:

Automesh

Constants

Copper resistivity:

1.678E-8 Ω·m

Copper density:

8.94g/cm³

Iron density:

7.87g/cm³

Resin density:

1.36g/cm³