Prediction of chiller compressor motor overheating

Details Prediction of chiller compressor motor overheating Prediction of chiller compressor motor overheating

1997-06-05

1999-06-08

Barlow, John

Data processing: measuring, calibrating, or testing

Measurement system

Measured signal processing

702196, G05B 101

Patent

active

059111275

ABSTRACT:
The impending overheating of the compressor motor in a chiller is predicted by comparing measured output values in the chiller with output values predicted by passing said output values and chiller input values through a Kalman filter. Variances which exceed thresholds are used to predict the overheating condition. The Kalman filter is derived from a low order state space model of the chiller, the matrix values of which are derived by linear regression from the outputs and states resulting from random signal input excitation of a high order model of the chiller in a computer.

REFERENCES:
patent: 4577270 (1986-03-01), Sugano et al.
patent: 5394322 (1995-02-01), Hansen
patent: 5633800 (1997-05-01), Bankert et al.
patent: 5654907 (1997-08-01), Lange
patent: 5740033 (1998-04-01), Wassick et al.

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