Motor current based air circuit obstruction detection
First Claim
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1. A method for determining an obstruction in an air circuit, the air circuit comprising a fan and a motor that drives the fan, for an environmental control unit, the method comprising the steps of:
- obtaining a load current of the motor via a sensor;
determining a state of the motor via a processor;
generating a comparison via the processor 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 via the processor.
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Abstract
A method for determining an obstruction in an air circuit, the air circuit having a fan and a motor that drives the fan, includes the steps of obtaining a load current of a motor coupled to the air circuit, comparing the load current to a predetermined value, and determining the obstruction using the load current and the predetermined value.
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Citations
20 Claims
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1. A method for determining an obstruction in an air circuit, the air circuit comprising a fan and a motor that drives the fan, for an environmental control unit, the method comprising the steps of:
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obtaining a load current of the motor via a sensor; determining a state of the motor via a processor; generating a comparison via the processor 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 via the processor. - View Dependent Claims (2, 3, 4, 5)
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6. A system for determining an obstruction in an air circuit for an environmental control unit, the system comprising:
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a sensor configured to at least facilitate obtaining a load current of a motor coupled to the air circuit; and a processor coupled to the sensor, the processor configured to at least facilitate; 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. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A system for determining an obstruction in an air circuit for an environmental control unit, the system comprising:
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a sensor configured to at least facilitate obtaining a load current of a motor coupled to the air circuit; and a processor that is part of an aircraft and coupled to the sensor, the processor configured to at least facilitate; comparing the load current to a predetermined value; and determining the obstruction using the load current and the predetermined value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification