Hello less magnets | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by noor.samir on Thu, 14/03/2019 - 14:53

Duration:

00:02:22

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	167.197 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	236.599 RPM	n_nom
Nominal tip speed ratio	3.71461	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	199 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	24 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	3.57063 m/s	cutin_Vw
Mechanical power (Torque)	991.189 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	6 mm	hr
Magnet width-to-pole pitch ratio	0.578055	ai
Inner-to-outer magnet radius	0.681848	kd
Flux density in airgap	0.543463 T	Bmax
Flux density on magnet surface	0.733476 T	Bmg
First harmonic of flux density in airgap	0.498878 T	Bp
Flux per pole (Calculated)	0.000736072 Wb	Flux_pole
Magnets on a rotor disk	24	magnet_num
Distance between magnets	8.0538 mm	dist_magnet_Rin
Magnet mass	3600 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	10000 mm3	Vmag
Volume of all magnets	480000 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	314.951 mm	Dout
Average radius	132.158 mm	Ravg
Inner radius	107.158 mm	Rin
Outer radius	157.475 mm	Rout
Effective outer radius	157.158 mm	Rout_eff
Mass of rotor disks	7.35752 kgr	BackIronMass
Volume of rotor disks	934.882 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.611 T	SaturMAX
Is the magnet rotor disk saturated?	Yes	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	17 mm	tw
Number of phases	3	nphase
Number of coils per phase	6	q
Total number of coils in stator	18	coil_num
Number of turns per coil	16	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	2	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	5.08 mm2	sc
Copper wire cross-sectional area (Calculated)	5.0252 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	2.53013 mm	dc_theor
Coil leg width	8.69305 mm	wc
Average length of coil turn	167.296 mm	lavg
Stator nominal temperature	99.9176 C°	tc_real
Stator surface area	523.553 cm²	stator_surface_area
Heat coefficient	0.360505	cq_real
Current density	5.93528 A	Jmax_real
Resistivity of copper at nominal temperature	2.18901E-8 Ohm.m	pt
Resistance of a single coil	0.0115343 Ohm	Rc
Phase resistance	0.0692056 Ohm	Rphase
Phase inductance	8.59076E-5 H	Ls
Nagaoka constant	0.339717	Kn
Winding coefficient	0.95	kw
Volume of a single coil	24723.3 mm3	coil_volume
Weight of a single coil	136.76 g	coil_weight_constr
Coil hole at Ravg	20 mm	coil_hole_Ravg
Coil hole at Rin	20 mm	coil_hole_Rin_constr
Coil hole at Rout	20 mm	coil_hole_Rout_constr
Coil mass for construction	2.59844 kgr	mcu_constr
RMS flux linkage of phase A	0.00675329 Wb	FluxRmsA
RMS flux linkage of phase B	0.00655219 Wb	FluxRmsB
RMS flux linkage of phase C	0.00673878 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.106 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	11.7039 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	11.8242 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	11.7053 V	V_rmsC
Current at the nominal wind speed	30.1512 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	47.3199 Hz	fnom
Generator power (Calculated)	1021.26 W	Pnom
Generator power (Torque)	782.749 W	PelN_Torque_x
Electromagnetic power (Torque)	981.196 W	PHMN_Torque_x
Copper losses (Calculated)	188.743 W	Pcopper
Copper losses (Torque)	188.743 W	PcopperN_Torque_x
Eddy current losses (Torque)	9.70437 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.789706	efftotalN_Torque_x
Generator efficiency (Calculated)	0.798432	efficiency_real
AC Power at the rectifier (Calculated)	919.133 W	Pnom_rect
AC Power at the rectifier (Torque)	704.474 W	PelN_Torque_x_rect
DC Power at the batteries (Calculated)	827.219 W	Pnom_dc
DC Power at the batteries (Torque)	634.026 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 (Calculated)	9.99286 W	Prot
Rotational losses (Torque)	9.99286 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	557.252 EUR	Totalcost
Total generator mass	16.169 kgr	TotalMass
Total generator volume	3.97325 dm3	TotalVolume
Blade rotor mass	6.45151 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	414.243 EUR	Magcost
Magnet shipping cost	28.9855 EUR	shippingcost
Copper mass	2.18816 kgr	mcu
Cost of copper	32.2973 EUR	coppercost
Resin mass	3.02327 kgr	resinmass
Cost of resin	41.7601 EUR	resincost
Resin volume	2222.99 cm3	ResinVolume
Total mass of one generator rotor	5.47876 kgr	TotalMassRotor
Cost of iron	9.04975 EUR	ironcost
Surface area of moulds	0.378165 m2	woodS
Total cost of moulds	59.9013 EUR	woodcost

Revolutions per minute (RPM)
0
236.599469

I_RMS (A)
0
30.15122

Output files

Octave/Matlab variable file:

simulation-6100.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.50m

Aerodynamic coefficient:

0.30

Cut-in wind speed:

3.00m/s

Nominal wind speed:

10.00m/s

Cut-in TSR:

8.75

Design TSR:

6.00

Air density:

1.204kg/m³

Generator Rotor Inputs

AFPM rotor topology:

Double Rotor

Magnetic material:

NdFeB N52

Number of generator poles:

Magnet length:

50mm

Magnet width:

20mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

6mm

Mechanical clearance:

1.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

Calculated

Stator thickness:

Calculated

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:

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