Flywheels store energy mechanically in a fast-spinning rotor. They deliver high power and withstand a very large number of cycles. As a demonstrator they make storage technology tangible.
- Setting: research and teaching, Otto von Guericke University Magdeburg and Leibniz University Hannover
- Key data: 200 Wh, 25,000 rpm (supercritical), 3.5 kW permanent magnet synchronous machine, rotor of high-strength aluminium and CFRP, medium vacuum, island-grid capable
My contribution
- Mechanical design with 3D model and drawings
- Selection of spindle bearings and power electronics
- Thermal model with lumped parameters
- Rotor dynamics design with the finite element method
- Construction and supervision in laboratory operation
Outcome
- A working demonstrator for exhibitions and teaching
- A modular test rig for studies on vacuum, windage losses and bearings