In low-pressure environment, partial discharges (PDs) appear for lower voltages, shortening strongly the machines life times fed by PWM inverters. A new approach is proposed for designing AC motor windings free of PD at low pressure. The method consists of adding a thin resistive layer on the outer surface of the enameled wire used for winding the machine. Thereby, PDs occur only in critical zones, near the wire connections, rather than randomly in coils. Consequently, a coil design with a small additional quantity of varnish in critical zones can increase strongly the partial discharge inception voltage (PDIV). The paper proposes a theoretical analysis of the improvement based on Paschen’s law for its application in non homogenous electrical fields.
A Proposition for Improving the Design of Motor Windings for low-Pressure Environment
01.06.2018
5661300 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Planet proposition gives environment first place
Online Contents | 2013
Brushless DC motor with dual windings
NTRS | 1971
|Motor and Generator Windings - Recent problems experienced
Online Contents | 2011
|