Help with mini high frequency induction heater

Discussion in 'The Projects Forum' started by liux2355, Jan 9, 2017.

  1. liux2355

    Thread Starter New Member

    Jan 9, 2017
    2
    0
    Hello,

    I am making a high frequency induction heater using the schematic I found online.
    http://4hv.org/e107_plugins/forum/forum_viewtopic.php?142264
    I was able to make the induction heater work and I measured the frequency to be about 5 MHz. The only problem is that the input current is really low (about 1 A), even when I apply 40 V voltage. Since the power is so low, I can only get the metal warm instead of glowing red. Does any one have any idea why my current input is so low? How can I modify my circuit to achieve high power?
    Thank you.
    IMG_2560.JPG 1343151826_4152_FT142264_3243_1343150063.jpg_206.jpg
     
  2. wayneh

    Expert

    Sep 9, 2010
    16,102
    6,219
    Your coil - not pictured? - may have a fairly high impedance at 5MHz. Shortening all your wire leads might help also.
     
  3. liux2355

    Thread Starter New Member

    Jan 9, 2017
    2
    0
    I will try to shorten my wire leads to see if it will increase the current. For the coil part, i am using the same number of turns and cross-section area, so the impedance should be similar to the one online.
     
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