US 12,760,919 B2 · System for predicting fan motor failure and a method thereof

Abstract

A system for predicting failure of an HVAC fan motor unit includes a fan motor controller for measuring a time duration between reception of the deactivation signal from the control circuitry and speed of a fan reaching zero rotations per minute (RPM). The measured time duration is then transmitted to the control circuitry. The control circuitry stores a set of test time durations characterizing a working fan motor unit. During operation, the control circuitry periodically transmits an activation signal or a deactivation signal to the fan motor controller. The control circuitry receives and compares the measured time duration from the fan motor controller with a test time duration to generate a delta time duration variable. Subsequently, the control circuitry determines if the generated delta time duration variable exceeds a threshold time duration and predicts a failure time duration for the generated delta time duration to reach the threshold time duration.

Claims20

Dependent claims

A system for predicting failure of a Heating, Ventilation and Air Conditioning (HVAC) fan motor unit, the system comprising:

a fan motor controller, upon receiving from a control circuitry a deactivation signal indicative of switching off at least one fan, configured to:
measure a time duration between reception of the deactivation signal from the control circuitry and a speed of the at least one fan reaching zero rotations per minute (RPM);
and
transmit the measured time duration to the control circuitry;
and
wherein the control circuitry is configured to:
transmit, periodically, one of an activation signal and the deactivation signal to the fan motor controller of the HVAC fan motor unit;
receive, upon transmitting the deactivation signal, the measured time duration from the fan motor controller;
compare the measured time duration with at least one test time duration from a set of stored test time durations to generate a delta time duration variable;
determine if the generated delta time duration variable exceeds a threshold time duration;
and
predict a failure time duration for the generated delta time duration variable to reach the threshold time duration.

9 more elements

A method for predicting failure of a Heating, Ventilation and Air Conditioning (HVAC) fan motor unit, the method comprising:

measuring, using a fan motor controller, a time duration between reception of a deactivation signal indicative of switching off at least one fan from a control circuitry and speed of the at least one fan reaching zero rotations per minute (RPM);
transmitting, using the fan motor controller, the measured time duration to the control circuitry;
storing, using the control circuitry, a set of test time durations characterizing a working fan motor unit;
transmitting periodically, using the control circuitry, one of an activation signal and the deactivation signal to the fan motor controller of the HVAC fan motor unit;
receiving, upon periodically transmitting the deactivation signal by the control circuitry, the measured time duration from the fan motor controller;
comparing, using the control circuitry, the measured time duration with at least one test time duration from the set of stored test time durations to generate a delta time duration variable;
determining if the generated delta time duration variable exceeds a threshold time duration;
and
predicting a failure time duration for the generated delta time duration variable to reach the threshold time duration.

6 more elements

Dependencies are inferred from the claim text.

System for predicting fan motor failure and a method thereof

Life of this patent

System for predicting fan motor failure and a method thereof

Life of this patent

Abstract

Claims20