Detection and protection device for motor anomalies and method thereof

Detection and protection device for motor anomalies and method thereof

  • CN 101,752,948 B
  • Filed: 12/19/2008
  • Issued: 01/07/2015
  • Est. Priority Date: 12/19/2008
  • Status: Active Grant
First Claim
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1. a motor abnormality detection protective device, be electrically connected a motor, it comprises:

  • One sensing cell, senses a state of this motor, and produces at least one first sensing signal and the output of one second sensing signal, comprising;

    One first resistance, first end is electrically connected this motor, in order to receive one by the electric current of this motor, and produces one first voltage on this first resistance;

    One second resistance, first end is electrically connected this first end and this motor of this first resistance, in order to receive this electric current by this motor, and produces one second voltage on this second resistance, and;

    One capacitor, first end is electrically connected one second end of this second resistance, the second end ground connection;

    Wherein this first voltage and this second voltage are respectively this first sensing signal and this second sensing signal;

    One abnormal deciding means, be electrically connected this sensing cell, this abnormal deciding means has one first preset value, can be judged to be abnormality when the variation wherein between this first sensing signal received and this second sensing signal exceeds this first preset value, and produces an alarm signal output;

    AndOne control unit, is electrically connected this sensing cell and this abnormal deciding means, after receiving this alarm signal, and controls this motor according to this alarm signal and shuts down.

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