Second | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by microlens on Sat, 07/04/2018 - 20:58

Duration:

00:03:18

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)	700.637 RPM	n_nom
Nominal tip speed ratio	4.4	tsr_nom
Mechanical power (Torque)	9.11963 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.24428	ai
Inner-to-outer magnet radius	0.879783	kd
Flux density in airgap	0.357023 T	Bmax
Flux density on magnet surface	0.71359 T	Bmg
First harmonic of flux density in airgap	0.266708 T	Bp
Flux per pole (Calculated)	2.57689E-5 Wb	Flux_pole
Magnets on a rotor disk	12	magnet_num
Distance between magnets	16.9912 mm	dist_magnet_Rin
Magnet mass	64.8 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	360 mm3	Vmag
Volume of all magnets	8640 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	100 mm	Dout
Average radius	46.9099 mm	Ravg
Inner radius	43.9099 mm	Rin
Outer radius	50 mm	Rout
Effective outer radius	49.9099 mm	Rout_eff
Mass of rotor disks	1.23622 kgr	BackIronMass
Volume of rotor disks	157.08 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.309786 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	6 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	43	Nc
Copper wire diameter	0.5 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	0.392699 mm2	sc
Copper wire diameter (Calculated)	0.707107 mm	dc_theor
Coil leg width	5 mm	wc
Average length of coil turn	39.7 mm	lavg
Stator nominal temperature	57.7 C°	tc_real
Stator surface area	35.73 cm²	stator_surface_area
Heat coefficient	0.0215685	cq_real
Current density	2.54648 A	Jmax_real
Resistivity of copper at nominal temperature	1.92472E-8 Ohm.m	pt
Resistance of a single coil	0.0836692 Ohm	Rc
Phase resistance	0.251008 Ohm	Rphase
Phase inductance	5.02274E-5 H	Ls
Nagaoka constant	0.344709	Kn
Volume of a single coil	1191 mm3	coil_volume
Weight of a single coil	6.27192 g	coil_weight_constr
Coil hole at Rin	6 mm	coil_hole_Rin_constr
Coil hole at Rout	6 mm	coil_hole_Rout_constr
Coil mass for construction	0.0627192 kgr	mcu_constr
RMS flux linkage of phase A	0.000535728 Wb	FluxRmsA
RMS flux linkage of phase B	0.00051456 Wb	FluxRmsB
RMS flux linkage of phase C	0.000537273 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	5.132 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	8.60221 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	0.710613 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	0.7086 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	0.709298 V	V_rmsC
Current at the nominal wind speed	1 A	Iac_nom
Nominal frequency	70.0637 Hz	fnom
Generator power (Torque)	0.754509 W	PelN_Torque_x
Electromagnetic power (Torque)	1.52114 W	PHMN_Torque_x
Copper losses (Torque)	0.753023 W	PcopperN_Torque_x
Eddy current losses (Torque)	0.0136061 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.0827346	efftotalN_Torque_x
AC Power at the rectifier (Torque)	0.679058 W	PelN_Torque_x_rect
DC Power at the batteries (Torque)	0.611152 W	PelN_Torque_x_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 (Torque)	7.5985 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	47.6958 EUR	Totalcost
Total generator mass	1.52391 kgr	TotalMass
Total generator volume	0.400553 dm3	TotalVolume
Blade rotor mass	0.412897 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	17.7014 EUR	Magcost
Magnet shipping cost	0.521739 EUR	shippingcost
Copper mass	0.0539385 kgr	mcu
Cost of copper	0.796132 EUR	coppercost
Resin mass	0.168953 kgr	resinmass
Cost of resin	2.33373 EUR	resincost
Resin volume	124.23 cm3	ResinVolume
Total mass of one generator rotor	0.650508 kgr	TotalMassRotor
Cost of iron	1.52055 EUR	ironcost
Surface area of moulds	0.16 m2	woodS
Total cost of moulds	25.344 EUR	woodcost

Revolutions per minute (RPM)
0
700.636943

I_RMS (A)
0
1

Output files

Octave/Matlab variable file:

simulation-532.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

0.60m

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Nominal TSR:

4.40

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Outer diameter:

100.00mm

Magnetic material:

NdFeB N40

Number of generator poles:

Magnet length:

6mm

Magnet width:

6mm

Magnet thickness:

10mm

Rotor disk thickness:

10mm

Mechanical clearance:

2.50mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

0.55

Current at nominal wind speed:

1.00A

Stator thickness:

6mm

Number of turns per coil:

Copper wire diameter:

0.50mm

Number of wires at hand:

Coil leg width:

5mm

Stator nominal temperature:

57.70C°

System Inputs

System voltage:

12.00V

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