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Method and drive system for operating a synchronous motor

  • US 7,492,118 B2
  • Filed: 12/12/2006
  • Issued: 02/17/2009
  • Est. Priority Date: 11/07/2006
  • Status: Expired due to Fees
First Claim
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1. A method for operating a first synchronous motor having stator windings used to generate electrical poles and having a first rotor, comprising:

  • providing a driving facility, having a first unit that determines an electrical rotation angle based upon a revolution speed of the first rotor, the electrical angle of rotation dependent upon the number of electrical poles, and a converter unit that controls the first synchronous motor according to the electrical rotation angle;

    a computing apparatus separated from the driving facility, wherein an output value for a speed is transmitted from the computing apparatus to the driving facility, and wherein the computing unit has a closed-loop control unit that determines the revolution speed based upon the portion of the first rotor;

    determining an electrical angle of rotation based upon a revolution speed of the first rotor, the electrical angle of rotation dependent upon the number of electrical poles;

    controlling the first synchronous motor based upon the electrical angle of rotation;

    determining a position of the first rotor based upon the electrical angle of rotation;

    determining the revolution speed based upon the position of the first rotor;

    providing a further synchronous motor having a further rotor operated by a position sensor that determines the position of the further rotor, and wherein the first synchronous motor is operated by the determined electrical rotation angle to determine the position of the first rotor, wherein the position data of the rotors are used for synchronizing the synchronous motors.

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