Hybrid control system for workpiece heating

A system and method of heating a workpiece to a desired temperature is disclosed. This system and method consider the physical limitations of the temperature device, such as time lag, temperature offset, and calibration, in creating a hybrid approach that heats the workpiece more efficiently. First,...

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Bibliographic Details
Main Authors Rohrer, Michael Paul, Strassner, James D, Sun, Dawei, Lischer, D. Jeffrey, Pomerleau, Bradley M
Format Patent
LanguageEnglish
Published 03.01.2023
Subjects
BASIC ELECTRIC ELEMENTS
CONTROLLING
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PHYSICS
REGULATING
SEMICONDUCTOR DEVICES
SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Summary:A system and method of heating a workpiece to a desired temperature is disclosed. This system and method consider the physical limitations of the temperature device, such as time lag, temperature offset, and calibration, in creating a hybrid approach that heats the workpiece more efficiently. First, the workpiece is heated using open loop control to heat the workpiece to a threshold temperature. After the threshold temperature is reach, a closed loop maintenance mode is utilized. In certain embodiments, an open loop maintenance mode is employed between the open loop warmup mode and the closed loop maintenance mode. Additionally, a method of calibrating a pyrometer using a contact thermocouple is also disclosed.
Bibliography:Application Number: US201916443043