Fan venturi blockage detection

Details Fan venturi blockage detection Fan venturi blockage detection

1997-09-11

2000-02-08

Nappi, Robert E.

Electricity: motive power systems

Limitation of motor load, current, torque or force

361 93, 361 23, 361 31, H02K 1732

Patent

active

060231386

ABSTRACT:
A fan venturi blockage detector for a DC electric fan and an associated method are disclosed employing a current detector for measuring the input current to the DC electric fan, and a processor connected to the current detector. The processor stores the measured input current value for the minimum input current to the fan under normal operating conditions, and sets a minimum current threshold at a value less than the normal operating condition measured current. The processor compares subsequent measured input current values with the minimum current threshold value, and provides an error signal upon the subsequent measured input current having a value equal to or less than the minimum current threshold value.

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