Alex4 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by abarmpatza on Thu, 28/09/2023 - 12:13

Duration:

00:04:03

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	57.3248 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	100.318 RPM	n_nom
Nominal tip speed ratio	3.15	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	54 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	300 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.826 m/s	cutin_Vw
Mechanical power (Torque)	3346.52 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.373087	ai
Inner-to-outer magnet radius	0.906874	kd
Flux density in airgap	0.383592 T	Bmax
Flux density on magnet surface	0.568357 T	Bmg
First harmonic of flux density in airgap	0.296365 T	Bp
Flux per pole (Calculated)	0.000568265 Wb	Flux_pole
Magnets on a rotor disk	60	magnet_num
Distance between magnets	30.9888 mm	dist_magnet_Rin
Magnet mass	9000 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	10000 mm3	Vmag
Volume of all magnets	1200000 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	1074 mm	Dout
Average radius	511.907 mm	Ravg
Inner radius	486.907 mm	Rin
Outer radius	537 mm	Rout
Effective outer radius	536.907 mm	Rout_eff
Mass of rotor disks	142.595 kgr	BackIronMass
Volume of rotor disks	18118.8 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.713159 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	20 mm	tw
Number of phases	3	nphase
Number of coils per phase	15	q
Total number of coils in stator	45	coil_num
Number of turns per coil	144	Nc
Copper wire diameter	1.5 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	1.76715 mm2	sc
Copper wire diameter (Calculated)	1.5 mm	dc_theor
Coil leg width	27 mm	wc
Average length of coil turn	202.16 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	4912.5 cm²	stator_surface_area
Heat coefficient	0.0672896	cq_real
Current density	2.9426 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.317068 Ohm	Rc
Phase resistance	4.75602 Ohm	Rphase
Phase inductance	0.0165072 H	Ls
Nagaoka constant	0.259713	Kn
Volume of a single coil	109167 mm3	coil_volume
Weight of a single coil	466.293 g	coil_weight_constr
Coil hole at Ravg	16.9757 mm	coil_hole_Ravg
Coil hole at Rin	13.4846 mm	coil_hole_Rin_constr
Coil hole at Rout	20.4651 mm	coil_hole_Rout_constr
Coil mass for construction	21.4495 kgr	mcu_constr
RMS flux linkage of phase A	0.0492057 Wb	FluxRmsA
RMS flux linkage of phase B	0.0481912 Wb	FluxRmsB
RMS flux linkage of phase C	0.0489885 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	128.3 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	224.525 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	228.301 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	229.988 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	228.522 V	V_rmsC
Current at the nominal wind speed	5.2 A	Iac_nom
Nominal frequency	50.1592 Hz	fnom
Generator power (Torque)	2912.21 W	PelN_Torque_x
Electromagnetic power (Torque)	3302.88 W	PHMN_Torque_x
Copper losses (Torque)	385.809 W	PcopperN_Torque_x
Eddy current losses (Torque)	4.86594 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.87022	efftotalN_Torque_x
AC Power at the rectifier (Torque)	2620.99 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	2358.89 W	PelN_Torque_x_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	6	No_bolts_hub
Mass of bearing hub	14290.7 g	BearingHubMass
Rotational losses (Torque)	43.638 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	1798.62 EUR	Totalcost
Total generator mass	187.005 kgr	TotalMass
Total generator volume	57.0741 dm3	TotalVolume
Blade rotor mass	51.6121 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	815.468 EUR	Magcost
Magnet shipping cost	72.4638 EUR	shippingcost
Copper mass	20.6957 kgr	mcu
Cost of copper	305.469 EUR	coppercost
Resin mass	14.7149 kgr	resinmass
Cost of resin	203.255 EUR	resincost
Resin volume	10819.8 cm3	ResinVolume
Total mass of one generator rotor	75.7973 kgr	TotalMassRotor
Cost of iron	175.391 EUR	ironcost
Surface area of moulds	1.88788 m2	woodS
Total cost of moulds	299.04 EUR	woodcost

Revolutions per minute (RPM)
0
100.318471

I_RMS (A)
0
5.2

Output files

Octave/Matlab variable file:

simulation-8312.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

3.00m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

6.00

Nominal TSR:

3.15

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

1074.00mm

Magnetic material:

NdFeB N35

Number of generator poles:

Magnet length:

50mm

Magnet width:

20mm

Magnet thickness:

10mm

Rotor disk thickness:

10mm

Mechanical clearance:

1.50mm

Generator Stator Inputs

Select coil type:

Keyhole

Winding fill factor:

0.55

Current at nominal wind speed:

5.20A

Stator thickness:

20mm

Number of turns per coil:

144

Copper wire diameter:

1.50mm

Number of wires at hand:

Coil leg width:

27mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

300.00V

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

Simulation Radius:

Average radius

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