Design of an Optimally Self-Protected Medium Frequency Power Supply for Induction Heating Purposes
Abdulkareem Mokif Obais
Professor at Department of Elect. Eng. , College of Engineering, University of Babylon

In this paper, the basic elements of the induction heating process are reviewed. The expected risks accompanying the power supplies when they are operated with induction-inductors are stated and a remedial solution is presented. The solution is a complete design of a power supply that operates without any restriction among a variety of widely extending ratings of induction-inductors. This supply is identified with an accurate load current limitation technique and is self-protected against real short circuits and extremely excessive loads. Its frequency can be smoothly varied from 500Hz to 10 KHz. It is easily possible to control load power continuously while induction heating process is proceeding.