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ASM Handbook

Induction Heating and Heat Treatment

Edited by
Valery Rudnev
Valery Rudnev
Inductoheat Inc.
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George E. Totten
George E. Totten
Portland State University
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ASM International
Volume
4C
ISBN electronic:
978-1-62708-167-2
Publication date:
2014
Book Chapter

Systematic Analysis of Induction Coil Failures and Prevention

By
Valery Rudnev
Valery Rudnev
Inductoheat, Inc.
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Published:
2014
Page range:
646 - 672
Publication history
May 27, 2014

Abstract

This article focuses on the frequently encountered causes of induction coil failures and typical failure modes in fabrication of hardening inductors, tooth-by-tooth gear-hardening inductors, clamshell inductors, contactless inductors, split-return inductors, butterfly inductors, and inductors for heating internal surfaces. It discusses the current density distribution and the skin effect, the proximity effect, and crack-propagation specifics. The article also describes selected properties of copper alloys, the electromagnetic edge effect of coil copper turn, and the effect of magnetic flux concentrators on coil life. It also reviews the importance of having appropriate and reliable electrical contacts.

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Valery Rudnev, 2014. "Systematic Analysis of Induction Coil Failures and Prevention", Induction Heating and Heat Treatment, Valery Rudnev, George E. Totten

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