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Circuit configuration for supplying an electric motor

  • US 6,741,062 B2
  • Filed: 02/19/2003
  • Issued: 05/25/2004
  • Est. Priority Date: 03/07/2002
  • Status: Expired due to Fees
First Claim
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1. 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.

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