Generator-001 | Online Design Tools for Locally Manufactured Small Wind Turbines

Submitted by galaxy d on Mon, 13/08/2018 - 20:06

Duration:

00:09:57

Tabs

Results

Blade Rotor Outputs
Property	Value	Variable name
RPM at the cut-in wind speed (TSR)	125.398 RPM	n_cut_in
RPM at the nominal wind speed (TSR)	179.436 RPM	n_nom
Nominal tip speed ratio	3.7562	tsr_nom
RPM at the cut-in wind speed (Flux Linkage)	121 RPM	cutin_RPM
Cut-in Voltage (Flux Linkage)	24 V	cutin_Voltage
Wind speed at cut-in RPM (Flux Linkage)	2.89478 m/s	cutin_Vw
Mechanical power (Torque)	2167.59 W	Pmech_Torque_x

Generator Rotor Outputs
Property	Value	Variable name
Rotor disk thickness	22 mm	hr
Magnet width-to-pole pitch ratio	0.374037	ai
Inner-to-outer magnet radius	0.638906	kd
Flux density in airgap	0.577808 T	Bmax
Flux density on magnet surface	0.645509 T	Bmg
First harmonic of flux density in airgap	0.392008 T	Bp
Flux per pole (Calculated)	0.0017483 Wb	Flux_pole
Magnets on a rotor disk	16	magnet_num
Distance between magnets	32.5345 mm	dist_magnet_Rin
Magnet mass	6480 g	MagnetMass
Magnet density	7.5 g/cm3	mag_density
Volume of a single magnet	27000 mm3	Vmag
Volume of all magnets	864000 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	499.388 mm	Dout
Average radius	204.243 mm	Ravg
Inner radius	159.243 mm	Rin
Outer radius	249.694 mm	Rout
Effective outer radius	249.243 mm	Rout_eff
Mass of rotor disks	67.8254 kgr	BackIronMass
Volume of rotor disks	8618.23 cm3	BackIronVolume
Maximum flux density in the magnet rotor disk	0.477013 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	21	Nc
Copper wire diameter	1.7 mm	dc
Number of wires at hand	4	No_wires_at_hand
Winding fill factor	0.55	kf
Copper wire cross-sectional area	9.08 mm2	sc
Copper wire cross-sectional area (Calculated)	8.50203 mm²	sc_theor
Copper wire cross-sectional area of a sinlge wire	2.27 mm²	sc_multi_wires
Copper wire diameter (Calculated)	3.29099 mm	dc_theor
Coil leg width	26.6685 mm	wc
Average length of coil turn	323.739 mm	lavg
Stator nominal temperature	63.7603 C°	tc_real
Stator surface area	2072.08 cm²	stator_surface_area
Heat coefficient	0.22042	cq_real
Current density	5.61808 A	Jmax_real
Resistivity of copper at nominal temperature	1.95344E-8 Ohm.m	pt
Resistance of a single coil	0.0146261 Ohm	Rc
Phase resistance	0.0585043 Ohm	Rphase
Phase inductance	0.000220286 H	Ls
Nagaoka constant	0.154897	Kn
Winding coefficient	0.95	kw
Volume of a single coil	112237 mm3	coil_volume
Weight of a single coil	604.431 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	7.8576 kgr	mcu_constr
RMS flux linkage of phase A	0.024335 Wb	FluxRmsA
RMS flux linkage of phase B	0.0238956 Wb	FluxRmsB
RMS flux linkage of phase C	0.0242241 Wb	FluxRmsC
EMF at the cut-in wind speed (Calculated)	10.264 V	EMF_cut_in
EMF at the nominal wind speed (Calculated)	14.8222 V	EMF_nom
RMS of EMF of phase A (Flux Linkage)	14.3968 V	V_rmsA
RMS of EMF of phase B (Flux Linkage)	14.5342 V	V_rmsB
RMS of EMF of phase C (Flux Linkage)	14.4224 V	V_rmsC
Current at the nominal wind speed	51.0122 A	Iac_nom
Terminal voltage at the nominal wind speed	11.2904 V	V_term_line
Nominal frequency	23.9248 Hz	fnom
Generator power (Calculated)	1727.85 W	Pnom
Generator power (Torque)	1664.11 W	PelN_Torque_x
Electromagnetic power (Torque)	2132.44 W	PHMN_Torque_x
Copper losses (Calculated)	456.728 W	Pcopper
Copper losses (Torque)	456.728 W	PcopperN_Torque_x
Eddy current losses (Torque)	11.6075 W	PeddyN_Torque_x
Generator efficiency (Torque)	0.767722	efftotalN_Torque_x
Generator efficiency (Calculated)	0.762174	efficiency_real
AC Power at the rectifier (Calculated)	1555.06 W	Pnom_rect
AC Power at the rectifier (Torque)	1497.7 W	PelN_Torque_x_rect
DC Power at the batteries (Calculated)	1399.55 W	Pnom_dc
DC Power at the batteries (Torque)	1347.93 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)	35.1488 W	Prot
Rotational losses (Torque)	35.1488 W	ProtN_Torque_x

Costs, Mass and Volume
Property	Value	Variable name
Total generator cost	946.22 EUR	Totalcost
Total generator mass	86.5519 kgr	TotalMass
Total generator volume	16.2571 dm3	TotalVolume
Blade rotor mass	15.2925 kgr	blade_rotor_mass
Softwood density	500 kgr/m³	softwood_density
Cost of magnets	586.142 EUR	Magcost
Magnet shipping cost	52.1739 EUR	shippingcost
Copper mass	6.62246 kgr	mcu
Cost of copper	97.7475 EUR	coppercost
Resin mass	5.62402 kgr	resinmass
Cost of resin	77.6841 EUR	resincost
Resin volume	4135.31 cm3	ResinVolume
Total mass of one generator rotor	37.1527 kgr	TotalMassRotor
Cost of iron	83.4253 EUR	ironcost
Surface area of moulds	0.63902 m2	woodS
Total cost of moulds	101.221 EUR	woodcost

Revolutions per minute (RPM)
0
179.436318

I_RMS (A)
0
51.012205

Output files

Octave/Matlab variable file:

simulation-861.mat

Input parameters

Blade Rotor Inputs

Turbine radius:

2.00m

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:

90mm

Magnet width:

30mm

Magnet thickness:

10mm

Rotor disk thickness:

User Defined

Rotor disk thickness:

22mm

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:

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