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Control of power to an inductively heated part

United States Patent

*** EXPIRED ***
May 20, 1997
View the Complete Patent at the US Patent & Trademark Office
Sandia National Laboratories - Visit the Intellectual Property Management and Licensing Website
A process for induction hardening a part to a desired depth with an AC signal applied to the part from a closely coupled induction coil includes measuring the voltage of the AC signal at the coil and the current passing through the coil; and controlling the depth of hardening of the part from the measured voltage and current. The control system determines parameters of the part that are functions of applied voltage and current to the induction coil, and uses a neural network to control the application of the AC signal based on the detected functions for each part.
Adkins; Douglas R. (Albuquerque, NM), Frost; Charles A. (Albuquerque, NM), Kahle; Philip M. (Rio Rancho, NM), Kelley; J. Bruce (Albuquerque, NM), Stanton; Suzanne L. (Albuquerque, NM)
08/ 371,901
January 12, 1995
The U.S. Government has rights in this invention pursuant to Department of Energy Contracts No. DE-AC04-76DP00789 and DE-AC04-94AL85000 with the American Telephone and Telegraph Company and Sandia Corporation, respectively.