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Motor current based air circuit obstruction detection

  • US 9,068,759 B2
  • Filed: 01/24/2012
  • Issued: 06/30/2015
  • Est. Priority Date: 12/17/2008
  • Status: Active Grant
First Claim
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1. A program product for determining an obstruction in an air circuit for an environmental control unit having a motor, the program product comprising:

  • a program configured to at least facilitate;

    obtaining a load current of the motor;

    determining a state of the motor;

    generating a comparison by;

    comparing the load current to a first plurality of values if the motor is in a steady state; and

    comparing the load current to a second plurality of values if the motor is in a transient state; and

    determining the obstruction using the load current and the comparison; and

    a non-transitory, computer-readable storage medium storing the program.

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