Design Calculations for Permanent-Magnet Generators [includes discussion]

This paper describes a simplified method for calculating the performance of permanent-magnet generators using equations, concepts, and units familiar to the designer of conventional a-c generators. The equations and curves permit the calculation of open-circuit voltage, transient performance, short-circuit current, synchronous impedance, and voltage regulation for various power factors. Leakage equations are presented for the most common type of permanent-magnet generator.