Inductoheat - An Inductotherm Group Company

Without a concentrator, the mag- netic flux would spread around the coil or current-carrying conductor and link with the electrically conductive surroundings (auxiliary equipment, metal supports, tools, and fixtures, for example). The concentrator forms a magnetic path to channel the coil’s main magnetic flux in a well-defined area outside the coil. Click here to learn [...]

The skin and proximity effects — as well as the “ring,” “slot,” and edge effects — lead to a nonuniform current distribution within a copper coil. Areas of high current density within this distribution are the primary candidates for localized hot spots, which can result in premature coil failure. Click here to read more about [...]

In induction heating applications longevity of inductor depends upon several factors, including coil copper selection. This article discusses how different copper grades used for fabrication of induction heating coils affect physical properties, main electrical parameters, copper losses, reliability and longevity of induction heaters. Among other phenomena article discusses copper stress-corrosion cracking, stress-fatigue cracking, galvanic corrosion, [...]

Non-uniform coil current distribution resulting from various electromagnetic phenomena has a dramatic effect on induction coil life and crack development in the coil copper. This article is one of series of articles devoted to a systematic scientific/engineering analysis of failures of induction heating coils and prevention. Article concentrates on coil copper electromagnetic edge effect, effect [...]

Electromagnetic (EM) forces play the major part in many modern technologies. Motors, magneto-hydro-dynamic (MHD) seals, electromagnetic pumps, levitators, electrical bearings, and springs are some of the modern technologies in which EM forces play a leading role. In some applications, EM forces can reach tremendous values. For example, thanks to a capability to develop incredibly large [...]

Magnetic flux concentrators (also called flux intensifiers, diverters, or flux controllers) are made from high permeability, low-power-loss materials. They are used in induction heat treating applications in a manner similar to that of magnetic cores in power transformers. Article concentrates on effect of magnetic flux concentrators on life of induction coils. Click here to read [...]

Induction heating is widely used to heat metals prior to hot forming including forging, upsetting, rolling, extrusion, and other methods. Billets are heated either in cut lengths or continuously and are forged in presses, hammers, or upsetters, or are extruded. Steel components by far represent the majority of hot-formed billets, although other materials including titanium, [...]

When designing and fabricating long-lasting induction systems it is important to consider the electromagnetic field in the immediate vicinity of the inductor. The use of low-resistivity nonferrous materials (preferably electrically non- conductive) in the area close to the inductor is recommended. Fasteners and washers used to connect bus-work to the inductor should also be nonferrous [...]

FREE Webinar: Avoiding Premature Coil Failures:Design and Fabrication of Long-lasting Inductors. DR. VALERY RUDNEV, FASM | WEDNESDAY, SEPTEMBER 29 | 2 P.M. EST Gain insight into the intricacies of fabricating long-lasting inductors. Discover the causes and prevention methods of premature coil failures through: • Importance of copper grade selection • Coil stress-fatigue cracking and prevention [...]

Want longer-lasting inductors? Look no further. HTPro eNews editor Ed Kubel facilitates this informative, FREE Webinar: Avoiding Premature Coil Failures:Design and Fabrication of Long-lasting Inductors. DR. VALERY RUDNEV, FASM | WEDNESDAY, SEPTEMBER 29 | 2 P.M. EST Gain insight into the intricacies of fabricating long-lasting inductors. Discover the causes and prevention methods of premature coil [...]