Electric motor control device

Electric motor control device

  • CN 1,482,733 B
  • Filed: 06/11/2003
  • Issued: 05/05/2010
  • Est. Priority Date: 09/13/2002
  • Status: Active Grant
First Claim
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1. the control device of a motor is transformed into the inverter that interchange drives motor thereby have the input direct current with it;

  • Be located at the resistance that the current detecting of the DC side of this inverter is used;

    And reproduce each phase current of above-mentioned motor and the element that constitutes above-mentioned inverter is generated the break-make instruction to control the device of above-mentioned motor according to each phase current of this reproduction according to the electric current that goes out by this resistance detection;

    Wherein, have carrier frequency when when the rotating speed of above-mentioned motor is low, reducing to generate above-mentioned break-make instruction, when rotating speed is high, increase the device of carrier frequency.

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