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Power Supplies, Load Matching, Process Control, QA and Monitoring [.pdf format]

Space Saving Induction Heating Innovations

Authors: Don L. Loveless, Valery I. Rudnev, Ray L. Cook, Timothy G. Boussie
Publication: Industrial Heating
Date: 3/1/1998

We must reduce costs, increase productivity, and maintain quality while utilizing a minimum amount of available floor space, says American automotive manufacturers. This requirement for highly efficient utilization of floor space is the last but certainly not least important factor when designing modern induction heat treating systems. This article discusses the space savings ideas which have been achieved by technical innovations in metal heat treating by induction.

Solid State Power Supplies for Modern Induction Heat Treating

Authors: Don L. Loveless
Publication: Proceedings of the 17th Heat Treating Conference
Date: 1/1/1997

Many new induction heating power supply designs have been introduced in the past few years. Most of those use the relatively new MOS FET or IGBT fast switching power transistors. Many different power supply types and models are available to meet the heating requirements of a nearly endless variety of induction heating applications. Different types of new solid state power supplies and the components they use are discussed in this article.

A Comparison of Radio Frequency Power Supplies

Authors: Ray L. Cook
Publication: Proceedings of the 17th Heat Treating Conference
Date: 1/1/1997

Recent developments in high current, high frequency semi-conductors have led to a major change in the field of induction heating power supply specification. Prior to the availability of these devices, motor generators and vacuum tube radio frequency oscillators dominated the market. Today, because of greater efficiency, safety, smaller size and lower cost solid state power supplies have replaced their predecessors in most applications. Because of differences in characteristics of solid state power supplies as opposed to the motor generators or vacuum tube oscillators it is necessary to use good judgment in evaluating specific application requirements to facilitate a harmonious blending of application requirements.

Load Matching in Modern Induction Heat Treating

Authors: Ray L. Cook, Don L. Loveless, Valery I. Rudnev
Publication: Industrial Heating
Date: 9/1/1995

Induction heat treating is a coplex process in which many factors are involved. The main components of an induction heat treating system are an induction coil, power supply, load matching station and the workpiece itself. A very important facet of induction heat treating that is often overlooked in the initial design stages is the ability to successfully deliver to the workpiece the maximum available power from a given power supply economically. Four steps in understanding load matching for solid state power supplies are discussed in this publication.

Process Monitoring for More Effective Induction Hardening Control

Authors: Ray L. Cook, R.J. Myers, Valery I. Rudnev
Publication: Modern Application News
Date: 8/1/1995

This article discusses one of the most important features of any induction heat treating machine: an adequate monitoring system. Energy (coil) monitoring and advanced signature monitoring concepts are discussed in this publication.

An Overview of Solid State Power Supplies for Induction Heating

Authors: Don L. Loveless
Publication: Metal Producing & Processing
Date: 8/1/1995

The author discusses the features of the most popular types of solid-state power supplies that are used for induction heating in metal producing operations, including rolling, forging, and extrusion.

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