Performance of a Variable Speed Constant Frequency Electrical System

This paper presents and discusses the performance data obtained in testing a 30 KVA aircraft generating system of the variable speed constant frequency (VSCF) type. The observed test results are compared with typical data from more conventional generating systems employing hydraulic constant speed drives and constant speed generators. Areas of performance such as voltage and frequency control, dc voltage content, voltage and frequency modulation and parallel operation of VSCF systems are emphasized.