A method for eliminating the vibration of a three phase electric motor has a rectifier and frequency generator with control units to ground the common point of the motor windings

摘要

The system (13) for the operation of a three phase electric motor (2) has the windings (21) supplied from a frequency generator (6) supplied by a rectifier (5) and three phase electrical supply (4) to earth (8). The floating potential changes above earth potential at the motor windings is controlled (25,30) to eliminate excessive vibrations.