Motor current based air circuit obstruction detection
AssigneeHoneywell International Inc.
InventorsRaj Mohan Bharadwaj, David Lazarovich
Life of this patent
Estimating the term…
Abstract
A program product for determining an obstruction in an air circuit for an environmental control unit having a motor is provided. The program product comprises a program and a non-transitory, computer-readable storage medium. The program is configured to at least facilitate obtaining a load current of the motor, determining a state of the motor, generating a comparison, and determining the obstruction using the load current and the comparison. The comparison is generated by comparing the load current to a first plurality of values if the motor is in a steady state, and by comparing the load current to a second plurality of values if the motor is in a transient state. The non-transitory, computer-readable storage medium stores the program.
Claims19
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.
A program product for determining an obstruction in an air circuit for an environmental control unit, the program product comprising:
- a program configured to at least facilitate:
- obtaining a load current of a motor of the environmental control unit;
- comparing the load current to a plurality of values, each of the plurality of values comprising a measure of load current of a corresponding one of a plurality of models;
- selecting one of the modules, based at least in part on the comparison of the load current to the plurality of values;
- obtaining a measure of obstruction from the selected one of the models;
- and
- determining the obstruction using the measure of obstruction;
- and
- a non-transitory, computer-readable storage medium storing the program.
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:
- determine a load current of the motor;
- determine a state of the motor;
- generate a comparison by:
- comparing the load current to a first plurality of values if the motor is in a steady state, each of the first plurality of values comprises a measure of load current of a corresponding one of a first plurality of models representing steady state operation of the motor;
- and
- comparing the load current to a second plurality of values if the motor is in a transient state, each of the second plurality of values comprises a measure of load current of a corresponding one of a second plurality of models representing transient state operation of the motor;
- select one of the models, based at least in part on the comparison of the load current to the plurality of values;
- obtain a measure of obstruction from the selected one of the models;
- and
- determine the obstruction using the measure of obstruction.
Dependencies are inferred from the claim text.