Investigations on AC AC resonant Converters for induction heating

Abstract

newlineThe most useful power sources for induction heaters are newlinesemiconductor converters The operating frequency range which is used for newlineinduction heating is about 0 5 500 kHz In each specific case the operating newlinefrequency depends on the volume of the heated block and also on the newlinecharacter of the technological process Initially the electrical machine newlinefrequency converters had been used for induction heaters the form of the newlineload voltage current was actually a sine wave After the introduction of newlineelectronic frequency converters the traditional sine waveform was conserved newlinein spite of the fact that modern power electronic converters permit the newlineproduction of various forms of output voltage and current In these cases newlineuseful effects can be obtained both in the power supply and in the newlinetechnological process Further semiconductor switching devices operate in the hard newlineswitch mode in various types of PWM converters and inverter topology newlineemployed in an Induction heating system newline newline