Inductances of a Practical Slip-Ring Primitive II - An Experimental Study

Inductance and specific permeance measurements which were taken on a 3-kW salient-pole machine are presented. These measurements support both the inductance ratios and the absolute magnitude resulting from the derivations given in Part I of the paper. Some of the inductance measurements are performed in what is believed to be an original application of the approach of Jones and of Prescott and El-Kharashi which allows a continuous analog read out of change of inductance as a function of change of position. Measurements of air-gap permeance suggest certain approximations may be made with reference to saturation and the equivalent field winding at the air gap.