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ELECTRONICALLY COMMUTATED MOTOR (ECM) AND METHOD OF CONTROLLING AN ECM

  • US 20070024225A1
  • Filed: 07/14/2006
  • Published: 02/01/2007
  • Est. Priority Date: 07/28/2005
  • Status: Abandoned Application
First Claim
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1. An electronically commutated motor (ECM) comprising:

  • a rotor (208);

    a stator (201) for electromagnetically interacting with the rotor (208), which stator is equipped with a stator winding arrangement (202, 204, 206);

    a power stage (122) for controlling the currents flowing in the stator winding arrangement (202, 204, 206) during operation;

    at least one current measuring element (242, 244) for sensing a measured value for the currents (I UPPER, I LOWER) flowing in the power stage;

    an overcurrent measuring element (152, 162) for evaluating an associated measured value and for sensing a current whose absolute value exceeds a predetermined limit value (I_MAX_UPPER, I_MAX_LOWER); and

    a holding element (154, 164) associated with the overcurrent measuring element (152, 162), which holding element is configured, upon occurrence of an overcurrent in the associated current measuring element (242, 244), to generate an overcurrent signal (OC_UPPER, OC_LOWER), to store it, and to deliver to the power stage (122) a corresponding signal in order to counteract the overcurrent.

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