Patent ID: 6741062
Filing Date: 2004-05-25
Classification: H02M,H02P

Abstract:
In a cable car system having an electric motor driving the cable car system, the electric motor having a stator with a plurality of groups of electromagnets, a circuit configuration for supplying the electric motor, comprising:a rectifier circuit for receiving an a.c. voltage from a supply network and for converting the a.c. voltage to a d.c. voltage; a plurality of converter circuits each associated with a respective one of the plurality of electromagnets for converting the d.c. voltage to a controllable-frequency a.c. voltage for driving the electric motor; and a plurality of energy storage circuits each associated with a respective one of the plurality of electromagnets and containing an accumulator connected between said rectifier circuit and a respective said converter circuit for modeling a flywheel mass for assuring that movement of the cable car system stops smoothly upon a cessation of the a.c. voltage from the supply network.