Feeder Impedance of Variable-Speed and Constant-Frequency Generating Systems for Airplanes

The impedance of feeders used with variable-speed and constant-frequency (VSCF) generating systems in airplanes is severely affected by the non-sinusoidal generator current and the airplane frame. The above effect was experimentally investigated for frequencies from 1500 to 3500 cps. Data obtained are necessary for the analysis of system transient and steady-state behavior. Impedance curves were constructed as an aid in the determination of the optimum configuration and location of feeder cables for VSCF systems.