Which Frequency is Appropriate For an Induction Heater

Discussion in 'General Electronics Chat' started by Abdel_Rahman, Jul 31, 2016.

  1. Abdel_Rahman

    Thread Starter Member

    Jul 19, 2016
    36
    0
    We have an Induction Heater about 30kVA, Consists of(Rectifier, H-Bridge IGBTs (FF300R12KS4) , Capacitor, Transformer, and coil)

    The problem is It has no output power when pressing RUN, I have tested all of its power components such as IGBTs and its drivers, capacitor and transformer, there is no any problems for them, but I have noticed that the controlling circuit - which initiates drive as a very low frequeny (about 100Hz) when measuring using multi-meter.

    The drivers get signal, but it seems to be protected by (Sat. Voltage). but there is no any Short circuits and the load is a light load.

    The question is: can I apply signal for IGBT drivers using micro-controller, also which frequency should I apply?
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,539
    2,369
    Your frequency is going to be dependent on the nature and size of the material being heated, with larger ferrous masses requiring lower frequency to obtain deeper penetration .
    Max.
     
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