Physical Science, Measurement and Instrumentation, Management and Education, IEE Proceedings A

A small electrostatic induction motor has been constructed, consisting of a cylindrical stator with 24 bars, forming eight pitches of three bars each, adjacent bars being connected in sequence to the lines of a three-phase 50 Hz voltage supply of 1400 V_RMS line-to-line. A rotor consisting of a hollow cylinder of polyvinylchloride, the inside surface of which is coated with a thin layer of graphite, is placed inside the stator. The machine was found to be self-starting, and observations were made of its static and dynamic frictional torques, and its steady-state speed on no load. These observations furnished the quantitative data required for the prediction of the machine torque and power against rotor speed, based on a detailed analysis of its mode of operation. It is hoped that the information obtained from a study of this experimental machine will prove useful as a basis for the design of machines to be employed for practical purposes in the future.