Title :
Advanced composite flywheel structural design for a pulsed disk alternator
Author :
Curtiss, D.H. ; Mongeau, P.P. ; Puterbaugh, R.L.
Author_Institution :
Kaman Electromagnetics Corp., Hudson, MA, USA
Abstract :
Electromagnetic guns require pulsed power supplies that deliver energy to the gun breech in the 2-6 millisecond regime. A flywheel energy storage machine in which the disk rotor contains the field excitation windings appears to be a practical approach to meeting energy/power density requirements. The general concept of constructing an axisymmetric disk to obtain a radial to hoop elastic modulus ratio (E/sub r//E/sub /spl theta//) that optimizes the strength of a radially thick disk is presented. A carbon fiber-epoxy rotor disk designed to operate at 650 meters per second rim speed with a 23% copper conductor thickness fraction is reviewed. Results of sub-scale and/or sub-thickness spin test disks are also discussed.<>
Keywords :
alternators; carbon fibre reinforced composites; flywheels; power supplies to apparatus; pulsed power technology; railguns; rotors; 2 to 6 ms; axisymmetric disk; composite flywheel structural design; copper conductor thickness fraction; disk rotor; electromagnetic guns; energy requirements; field excitation windings; flywheel energy storage; gun breech; power density requirements; pulsed disk alternator; pulsed power supplies; radial to hoop elastic modulus ratio; strength optimisation; sub-scale spin test disks; sub-thickness spin test disks; Alternators; Boring; Conductors; Energy storage; Flywheels; Pulsed power supplies; Rectifiers; Rotors; Tensile stress; Turbines;
Journal_Title :
Magnetics, IEEE Transactions on
