Factors to consider when choosing the frequency of an induction heating machine: Depth of heating. Generally speaking, the higher the frequency, the smaller the heating depth. Therefore, surface quenching generally chooses high-frequency or ultra-high-frequency machines. Generally, when selecting the frequency, it will be considered comprehensively according to the heating speed and temperature requirements, and then match the machine with the appropriate power.

Common frequencies for induction heating machines:

  • High frequency: 30kHz-100kHz.
  • Medium frequency: 1kHz-10kHz.
  • Ultra high frequency: 200kHz-800kHz.
  • Super audio frequency: 20kHz-50kHz.