The significance of conductivity and polarization in materials for electrostatic motors

Author

Mognaschi, Ezio Roberto ; Calderwood, James Henry

Author_Institution

Dipt. di Fisica A. Volta, Pavia Univ., Italy

fYear

1996

fDate

25-30 Sep 1996

Firstpage

1050

Lastpage

1054

Abstract

An electrostatic motor has been designed and built, and its construction is described. It was capable of running either as an induction motor or as a synchronous motor, depending on the electrical characteristics of the rotor material. The critical factor determining which behaviour is exhibited appears to be the time constant of the rotor material. Analytical expressions are given for the mechanical torque developed when the machine is running in each mode. When mechanical torque was applied to the axle of the unenergised machine, it was observed that an ac emf appeared at the terminals and the machine was therefore operating as a generator

Keywords

dielectric polarisation; electrical resistivity; electrostatic devices; induction motors; micromotors; permittivity; rotors; synchronous motors; torque; ac emf; analytical expressions; electrostatic motors; generator; induction motor; material conductivity; material polarization; mechanical torque; permittivity; resistivity; rotor material electrical characteristics; rotor material time constant; synchronous motor; Axles; Conducting materials; Conductivity; Electric variables; Electrostatics; Induction motors; Polarization; Rotors; Synchronous motors; Torque;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrets, 1996. (ISE 9), 9th International Symposium on

Conference_Location

Shanghai

Print_ISBN

0-7803-2695-4

Type

conf

DOI

10.1109/ISE.1996.578257

Filename

578257