Updated: June 5, 2018
An inductor’s shape and construction style are determined predominantly by the geometry of the workpiece section to be heated, and the possibilities are infinite. The following list is a guide to basic types of inductors and possible uses. Click on the photo to see examples up close.
- Single turn have a single turn of tubing for a head that is commonly used for either in-field or out-field heating on workpieces, where the desired heat zone is limited in width.
- Multi-turn have two or more concentric turns of tubing for a head that is commonly used for either in-field or out-field heating on workpieces, where the desired heat zone is larger in width than a single turn coil.
- Face-heating have a flat heating face on the head that heats a workpiece from only one side.
- Clamshell inductors are made from two halves that mechanically open and close to enable heating of the full OD of a part, where the ends of the part are inaccessible or too large to allow a single or two turn coil to pass over them.
- Fork coils have two fork-like tines that are used to heat two opposing sides of a workpiece.
- Pretzel type are designed to have the current in two adjacent lengths of tubing, running the same direction rather than opposing one another. This is commonly used for brazing butt joints.
- Hairpin inductors are designed with a simple out-and-back heating face.
- Flexible Heating Cables with Heating Cable Box are used when the workpiece is too large for a conventional inductor.
Inductor design and manufacture are two of eldec’s core competencies. Each eldec induction heating coil is specifically designed and made-to-order by highly trained personnel at eldec in Auburn Hills, Michigan, ensuring precision and accuracy.
Since the quality of the inductor is so critical to the results of the process, we also offer specialized training for induction coil manufacturing. Subdivided by theoretical and practical training sessions, participants are first taught the theoretical principles before the practical exercises, where they learn how to build a suitable coil based on frequency, material and power density.