Development of Dual Frequency Alternator Technology Based Power Source For Military Applications

This paper presents a Dual frequency alternator, which generates power output at 50Hz and 400Hz. In weapon system applications 50Hz and 400Hz power is required to meet the requirement of different loads which operate at different frequencies simultaneously. To cater power supply to these loads either separate generators are required to be used or 50Hz and 400Hz power is obtained by solid-state conversion using power converters. These separate power sources increases the logistics, space requirement, maintenance, repairs and overhauls. To overcome these difficulties special kind of machine called Dual Frequency Alternator has been designed to give power outputs of 50Hz and 400Hz frequencies simultaneously with a single prime mover (Engine). In this paper design, development and performance evaluation of the Dual frequency output alternator along with integrated power supply system is discussed. Experimental results are also presented that demonstrate the high performance of Dual frequency output Alternator technology for future Power generation system. Index Terms-Integrated Power Supply, Dual Frequency Alternator, EMI Filter, Dual Rotor Shaft, Excitation Rectifier, Weapon system application, Prime Mover