×

Method and device for monitoring the operation of a motor

  • US 5,512,883 A
  • Filed: 04/25/1995
  • Issued: 04/30/1996
  • Est. Priority Date: 11/03/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of monitoring the operation of a motor-driven system, comprising the steps of:

  • sensing a current drawn by the motor at a preselected time after starting the motor;

    comparing the sensed current to previously determined minimum and maximum current threshold values which define a range of currents;

    determining that a malfunction has occurred in the system when the current is sensed outside the range of currents;

    adjusting at least one of the minimum and maximum current threshold values as a function of the sensed current; and

    storing the adjusted threshold values to be used the next time the preceding steps are carried out.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×