Titel: No-load core loss prediction of PM generator at low electrical frequency
Författare: Fredrik Bülow, Sandra Eriksson, Hans Bernhoff
Utgivare: Renewable Energy
Årtal: 2012
Ämnesord: Core loss, Variable speed, PM generator, Cable wound generator, Loss separation
Rapport via ScienceDirect
Sammanfattning/Abstract: A method for measurement of frequency dependent electromagnetic core loss of a permanent magnet generator is presented. Core loss of a PM generator is measured at electrical frequencies ranging from 4 to 14 Hz. Core loss in the same interval is simulated using the finite element method and frequency domain loss separation. The specific loss is both extrapolated from specific loss at 50 Hz and measured directly at 4, 8, 12 and 16 Hz. Core loss simulations based on extrapolated specific loss are 38–53% smaller than measured loss. Core loss simulations based on specific loss measured at 4, 8, 12 and 16 Hz are 19–23% smaller than measured loss.