5 kWh / 250 kW Flywheel with HTS Bearing

CFRP Rotor

HTS bearing

Power electronics

YBCO bulks

Magnet excitation system

Concept:

• storage capacity:    5-6 kWh / 250 kW
• HTS magnetic bearings, low loss
• high rim speed (800 - 1000 m/s)
• annular CF rotor body
• low loss high power generator / motor
• time to full power : 2 millisec

Specification:

• Compact design / comparable small volume
• Stored energy /max. power: > 5 kWh/250 kW
• Non-contacting magnetic rotor stabilization
• 450 kg composite fibre rotor
• Low electrical and windage losses
• High –efficient PM motor / generator
• HTS bearing: 10 N/cm² force density
• UPS and power quality application
• Round -trip efficiency > 90 %