在无锅具时，线盘和谐振电容震荡时间长，能量衰减慢，流过T1初级电流较少，T1次级电压就低，CPU判断无锅。有锅具时，由于有合适材质的锅具的加入，线盘和谐振电容之间的震荡阻尼加大，能量衰减快，在T1初级变化的电流大，在次级感应出的电压大，CPU判断有锅-In the absence of pot when they coil and resonant capacitor concussion a long time and slow energy decay, the primary current flow through T1 less, T1 secondary voltage is low, CPU judgment-free pot. There is a pot, due to the availability of suitable materials with the addition of the pot, coil and resonant capacitor between the shock damping to increase energy attenuation of fast changes in the T1 primary current, and in the sub-sensors of the voltage large, CPU determine pot