1. Electromechanical Battery for Rural Power Supplies By D.Johnson, M.Malengret and P.Pillay + + Clarkson University, ECE Dept., Potsdam, NY, 13699. University of Cape Town, South Africa

2. Types of storage Chemical- batteries Potential- pumped storage, pneumatic, magnetic Kinetic- flywheels Electrical- supercapacitors

4. Storage by kinetic energy Flywheel Bearings Motor/generator Enclosure Converter Controller

5. Berger and Porat [1] Piecewise definition of exact optimal shapes

6. Thin walled cylinder

7. Ultimate speed Flywheel

8. The six degrees of freedom of a body

9. Radial magnetic bearing

11. Axial Bearing

12. Model of motor

14. Motor with Halbach Array

15. Actual Flux reading with a Gauss meter

17. Prototype dual rim composite flywheel

18. Encoder disk with optical pickups

20. Three phase full bridge converter

22. Brushless EMB prototype suspended on modified roller bearings

23. Brushless EMB prototype with vacuum containment suspended on magnetic bearings

24. WindingsV L-L (Delta Connected)V L-L (Star Connected) 14 24 41.6 20 34.3 59.4 25 42.9 74.3 Maximum estimated Voltages for different stator windings

26. Conclusions Overview of storage technologies Magnetic bearings Brushless dc machine Drive schematic Test Results