Electromagnetic oven circuit based on soc chip

An electromagnetic oven circuit based on SoC chip, comprising a rectifier bridge, a filter, a power inversion circuit composed of IGBT and LC resonance loop and a control unit, wherein:

• the control unit adopts a CHK-S008 type SoC chip in which a CPU, several comparators each connected to a corresponding input terminal of the CPU, one operational amplifier, an A/D converter and an IGBT drive control module connected to one output terminal of the CPU are integrated;
• and further comprising:
• a feedback excitation IGBT driver which comprises the IGBT drive control module in the SoC chip, a first comparator among the several comparators in the chip, an external drive circuit and an external feedback circuit connected between an output terminal of the IGBT drive control module and an in-phase input terminal of the first comparator, an output terminal of the first comparator being connected to a feedback terminal of the IGBT drive control module and the external drive circuit being connected between the output terminal of the IGBT drive control module and an input terminal of the power inversion circuit for driving the operation of the power inversion circuit;
• and
• a synchronization signal detection circuit which comprises the first comparator in the SoC chip, a synchronization signal sampling circuit connected to the input terminal of the first comparator and the external feedback circuit connected between the output terminal of the IGBT drive control module and the in-phase input terminal of the first comparator, the external feedback circuit feeding back the pulse signal output from the IGBT drive control module to the in-phase input terminal of the first comparator.