Induction Heating Topologies
As previously mentioned, there are two common
topologies used in induction heating. The Quasi−resonant,
boost converter is normally used for single burner cook pads
sold mainly in Asia. This topology requires that the inductor
reset voltage be added to the rectified line voltage, so a
1200 V or 1350 V IGBT is required. The resonant,
half−bridge is normally used in multiple burner cooktops
(Hobs) sold mainly in Europe. This topology resets the
inductor as a normal half−bridge circuit would so the voltage
doesn’t exceed the line voltage and 600 to 650 V IGBTs are
normally used.