3.6N HP 48V | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by Kostas on Fri, 08/07/2022 - 10:05

Duration:

00:15:13

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	139.331 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	229.142 RPM	n_nom
Nominal tip speed ratio	4.31703	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	135 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	48 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.90674 m/s	cutin_Vw
Mechanical power (Torque)	1801.77 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	10 mm	hr
Magnet width-to-pole pitch ratio	0.425758	ai
Inner-to-outer magnet radius	0.772762	kd
Flux density in airgap	0.578116 T	Bmax
Flux density on magnet surface	0.645245 T	Bmg
First harmonic of flux density in airgap	0.431671 T	Bp
Flux per pole (Calculated)	0.000894873 Wb	Flux_pole
Magnets on a rotor disk	16	magnet_num
Distance between magnets	31.4304 mm	dist_magnet_Rin
Magnet mass	3312 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	13800 mm3	Vmag
Volume of all magnets	441600 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	405.973 mm	Dout
Average radius	179.431 mm	Ravg
Inner radius	156.431 mm	Rin
Outer radius	202.986 mm	Rout
Effective outer radius	202.431 mm	Rout_eff
Mass of rotor disks	20.3746 kgr	BackIronMass
Volume of rotor disks	2588.89 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	1.11445 T	SaturMAX
Is the magnet rotor disk saturated?	No	Saturation

Generator Stator Outputs
Property	Value	Variable name
Stator thickness	13 mm	tw
Number of phases	3	nphase
Number of coils per phase	4	q
Total number of coils in stator	12	coil_num
Number of turns per coil	73	Nc
Copper wire diameter	1.8 mm	dc
Number of wires at hand	1	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	2.54 mm2	sc
Copper wire cross-sectional area (Calculated)	2.42468 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.54 mm²	sc_multi_wires
Copper wire diameter (Calculated)	1.75749 mm	dc_theor
Coil leg width	25.9329 mm	wc
Average length of coil turn	233.429 mm	lavg
Stator nominal temperature	115.312 C°	tc_real
Stator surface area	1452.84 cm²	stator_surface_area
Heat coefficient	0.411714	cq_real
Current density	7.15949 A	Jmax_real
Resistivity of copper at nominal temperature	2.24675E-8 Ohm.m	pt
Resistance of a single coil	0.15073 Ohm	Rc
Phase resistance	0.602919 Ohm	Rphase
Phase inductance	0.00163306 H	Ls
Nagaoka constant	0.18278	Kn
Winding coefficient	0.95	kw
Volume of a single coil	78695.4 mm3	coil_volume
Weight of a single coil	397.546 g	coil_weight_constr
Coil hole at Ravg	30 mm	coil_hole_Ravg
Coil hole at Rin	30 mm	coil_hole_Rin_constr
Coil hole at Rout	30 mm	coil_hole_Rout_constr
Coil mass for construction	5.1681 kgr	mcu_constr
RMS flux linkage of phase A	0.0438112 Wb	FluxRmsA
RMS flux linkage of phase B	0.0430322 Wb	FluxRmsB
RMS flux linkage of phase C	0.0435734 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	20.528 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	33.6787 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	33.2171 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	33.5066 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	33.2645 V	V_rmsC
Current at the nominal wind speed	18.1851 A	Iac_nom
Terminal voltage at the nominal wind speed	22.5808 V	V_term_line
Nominal frequency	30.5522 Hz	fnom
Generator power (Calculated)	1231.9 W	Pnom
Generator power (Torque)	1180.94 W	PelN_Torque_x
Electromagnetic power (Torque)	1781.98 W	PHMN_Torque_x
Copper losses (Calculated)	598.153 W	Pcopper
Copper losses (Torque)	598.153 W	PcopperN_Torque_x
Eddy current losses (Torque)	2.88382 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.655435	efftotalN_Torque_x
Generator efficiency (Calculated)	0.66173	efficiency_real
AC Power at the rectifier (Calculated)	1108.71 W	Pnom_rect
AC Power at the rectifier (Torque)	1062.85 W	PelN_Torque_x_rect
DC Power at the batteries (Calculated)	997.842 W	Pnom_dc
DC Power at the batteries (Torque)	956.563 W	PelN_Torque_x_dc

Generator Bearing Hub Outputs
Property	Value	Variable name
Number of bolts on hub	5	No_bolts_hub
Mass of bearing hub	8344.46 g	BearingHubMass
Rotational losses (Calculated)	19.7883 W	Prot
Rotational losses (Torque)	19.7883 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	522.457 EUR	Totalcost
Total generator mass	31.4074 kgr	TotalMass
Total generator volume	7.63722 dm3	TotalVolume
Blade rotor mass	11.1482 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	307.406 EUR	Magcost
Magnet shipping cost	26.6667 EUR	shippingcost
Copper mass	4.64334 kgr	mcu
Cost of copper	68.5357 EUR	coppercost
Resin mass	3.07748 kgr	resinmass
Cost of resin	42.5089 EUR	resincost
Resin volume	2262.85 cm3	ResinVolume
Total mass of one generator rotor	11.8433 kgr	TotalMassRotor
Cost of iron	25.0607 EUR	ironcost
Surface area of moulds	0.498397 m2	woodS
Total cost of moulds	78.9461 EUR	woodcost

Revolutions per minute (RPM)
0
45.828301
91.656602
137.484903
183.313204
229.141505

I_RMS (A)
0
3.637022
7.274044
10.911066
14.548088
18.185111

Output files

Octave/Matlab variable file:

simulation-7484.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

1.80m

Aerodynamic coefficient:

0.30

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:

User Defined

Rotor disk thickness:

10mm

Mechanical clearance:

3.00mm

Generator Stator Inputs

Select coil type:

Rectangular

Winding fill factor:

User defined

Winding fill factor:

0.55

Stator thickness:

User defined

Stator thickness:

13mm

Current density:

7.50A/mm2

System Inputs

System voltage:

48.00V

Nominal voltage:

48.00V

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