PMG thesis | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Felrin floyd on Sun, 26/04/2020 - 05:34

Duration:

00:00:01

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	417.994 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	572.326 RPM	n_nom
Nominal tip speed ratio	2.39614	tsr_nom

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.858458	ai
Inner-to-outer magnet radius	0.495757	kd
Flux density in airgap	0.36 T	Bmax
Flux density on magnet surface	0.44 T	Bmg
First harmonic of flux density in airgap	0.2 T	Bp
Flux per pole (Calculated)	0.00063536 Wb	Flux_pole
Magnets on a rotor disk	8	magnet_num
Distance between magnets	-8.6571 mm	dist_magnet_Rin
Magnet mass	2079.36 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	17328 mm3	Vmag
Volume of all magnets	277248 mm3	VolumeMagnet
Remanent magnetic flux density	1.45 T	Br
Magnetic coercivity	1120020 A/m	Hc
Maximum Energy Product	422 KJ/m³	BHmax
Outer diameter	155.438 mm	Dout
Average radius	56.3605 mm	Ravg
Inner radius	37.3605 mm	Rin
Outer radius	77.7188 mm	Rout
Effective outer radius	75.3605 mm	Rout_eff
Mass of rotor disks	2.9868 kgr	BackIronMass
Volume of rotor disks	379.517 cm3	BackIronVolume

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	35 mm	tw
Number of phases	3	nphase
Number of coils per phase	2	q
Total number of coils in stator	6	coil_num
Number of turns per coil	69	Nc
Copper wire diameter	1.9 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	2.83 mm2	sc
Copper wire cross-sectional area (Calculated)	2.74831 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.83 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.8711 mm	dc_theor
Coil leg width	10.2453 mm	wc
Average length of coil turn	170.567 mm	lavg
Stator nominal temperature	213.637 C°	tc_real
Stator surface area	209.702 cm²	stator_surface_area
Heat coefficient	0.676796	cq_real
Current density	5.8268 A	Jmax_real
Resistivity of copper at nominal temperature	2.09179E-8 Ohm.m	pt
Resistance of a single coil	0.0869913 Ohm	Rc
Phase resistance	0.173983 Ohm	Rphase
Phase inductance	0.000383345 H	Ls
Nagaoka constant	0.484329	Kn
Winding coefficient	0.95	kw
Volume of a single coil	61163 mm3	coil_volume
Weight of a single coil	306.392 g	coil_weight_constr
Coil hole at Ravg	38 mm	coil_hole_Ravg
Coil hole at Rin	17.9557 mm	coil_hole_Rin_constr
Coil hole at Rout	56.5111 mm	coil_hole_Rout_constr
Coil mass for construction	2.14474 kgr	mcu_constr
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.113 V	EMF_nom
Current at the nominal wind speed	16.4898 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	38.1551 Hz	fnom
Generator power (Calculated)	558.531 W	Pnom
Copper losses (Calculated)	141.925 W	Pcopper
Eddy current losses (Calculated)	2.08056 W	Peddy
Generator efficiency (Calculated)	0.783294	efficiency_real
AC Power at the rectifier (Calculated)	502.678 W	Pnom_rect
DC Power at the batteries (Calculated)	452.41 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)	10.5167 W	Prot

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	249.316 EUR	Totalcost
Total generator mass	9.25804 kgr	TotalMass
Total generator volume	1.38524 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	238.62 EUR	Magcost
Magnet shipping cost	16.742 EUR	shippingcost
Copper mass	1.78657 kgr	mcu
Cost of copper	2.19748 EUR	coppercost
Resin mass	2.40532 kgr	resinmass
Cost of resin	2.95854 EUR	resincost
Resin volume	1768.61 cm3	ResinVolume
Total mass of one generator rotor	2.53308 kgr	TotalMassRotor
Cost of iron	3.67377 EUR	ironcost
Surface area of moulds	0.207423 m2	woodS
Total cost of moulds	1.86681 EUR	woodcost

Output files

Octave/Matlab variable file:

simulation-6320.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

15.00m/s

Cut-in TSR:

8.75

Design TSR:

7.00

Air density:

1.220kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Single Rotor with metal disk

Magnetic material:

NdFeB N52

Number of generator poles:

Magnet length:

38mm

Magnet width:

38mm

Magnet thickness:

12mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

35mm

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:

1.00€/kg

Iron price:

1.00€/kg

Resin price:

1.00€/kg

Plywood price:

1.00 €/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