Ponencia de Alexandros Konstantinidis (SEYNers) durante su participación en el workShop de la Semana de la Energía Limpia de Canarias (4 y 10 de abril de 2016) organizado por ei ICEACAN - Instituto de las Comunidades Energéticas Autosuficlentes de Canarias - islas Cananas - España

1. Design of locally manufactured small generators
for low cost rural applications

2. Objective: To describe the power system and the procedure of the
construction of an axial flux generator
Steps
1. Design of the pico – power system
2. Design of the generator
3. Construction of the generation
4. Costing

3. Low cost rural applications
Applications
• Agricultural applications in the developing world or in off-grid areas electrification
for small community or small farm.
• Easy construction in a local lab by users or local .
Turbines
• Wind turbines
• Hydro turbines

4. Design of an autonomous small power system
Connection to autonomous small-scale battery systems

5. Axial flux vs radial flux generators
 Simple construction
 Low cost
 Light weight
 Brushless-good heat dissipation
 Easy airgap adjustment
Advantages of an axial flux permanent magnet
generator

6. Design of an axial flux permanent magnet generator
Power
rating
200 W 350 W 700 W 800W 1000 W 1200 W
Blade
radius (for
wind turbine)
1200 mm 1800 mm 2400 mm 3000 mm 3600 mm 4200 mm
Rotor
diameter
230mm 250mm 300 mm 350 mm 400 mm 450 mm
Rotor
thickness
6 mm 6 mm 8 mm 10 mm 10 mm 10 mm
Number
of poles
8 8 24 32 32 32
Number
of coils
6 6 18 24 24 24

7. Stator construction

8. Stator construction

9. Rotor construction

10. Rotor construction

11. Machine assembly

12. Generator Cost
Nominal
Power
400 W
(iron-cored)
850 W
(Rturb=1.2m)
3 kW
(Rturb=2.25 m)
5 kW
(Rturb=3m)
Total cost 139 € 309 € 410 € 961 €
Magnet cost 77 € 151 € 213 € 584 €
Copper cost 15 € 44 € 70 € 119 €
Total mass 8.80 kg 12.47 kg 35.48 kg 61.43 kg