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1. (WO2017151960) HEATER ELEMENT AS SENSOR FOR TEMPERATURE CONTROL IN TRANSIENT SYSTEMS

Pub. No.:    WO/2017/151960    International Application No.:    PCT/US2017/020506
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Fri Mar 03 00:59:59 CET 2017
IPC: H05B 1/02
H05B 3/12
Applicants: WATLOW ELECTRIC MANUFACTURING COMPANY
Inventors: CULBERTSON, David, P.
OHSE, Jeremy
EVERLY, Mark, D.
QUANDT, Jeremy, J.
PRADUN, James, N.
ROHDE, John, P.
HOVEN, Mark, L.g.
WADEWITZ, Bret
ZHANG, Sanhong
Title: HEATER ELEMENT AS SENSOR FOR TEMPERATURE CONTROL IN TRANSIENT SYSTEMS
Abstract:
A method of predicting the temperature of a resistive heating element in a heating system is provided. The method includes obtaining resistance characteristics of resistive heating elements and compensating for variations in the resistance characteristics over a temperature regime. The resistance characteristics of the resistive heating element include, but are not limited to, inaccuracies in resistance measurements due to strain-induced resistance variations, variations in resistance due to the rate of cooling, shifts in power output due to exposure to temperature, resistance to temperature relationships, non-monotonic resistance to temperature relationships, system measurement errors, and combinations of resistance characteristics. The method includes interpreting and calibrating resistance characteristics based on a priori measurements and in situ measurements.