The fan drive voltage of Jiuyang induction cooker is 18 volts, which is obtained through the power management chip of induction cooker, driving the switching transformer on the induction cooker by diode rectifier filter. The role of this 18 volt voltage is used to drive the cooling fan to work, and it is also the driving voltage used by the post-stage IGBT driver to the tube. If the voltage of the induction cooker is not normal, it will affect the normal operation of the induction cooker.