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Making a tranformer

Discussion in 'General Electronics Discussion' started by RobertEagle, Apr 8, 2013.

  1. RobertEagle

    RobertEagle

    11
    0
    Aug 24, 2012
    Hi,

    I want to make a transformer. These are the properties of the transformer I want:
    • have high frequencies (eg. 10-25Khz, high saturation level)
    • have high voltage limit (up to 1Kv)
    • have a ratio between primary and secondary of 100:1

    I've already got a ferrite core, E shape. I've already made the coils, with a ratio of 100. The problem is when I turn it on. On the oscilloscope it looks like it's oversaturated. I barely get a few mW out of 2W.
    I've used the ferrite because I know it can handle frequencies up to 1Mhz.
    The source signal has a frequency of 20Khz, at 900V, when it's not connected to the transformer.

    What's the problem here? Should I use a different kind of core?

    Thank you
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

    9,219
    1,857
    Nov 17, 2011
    Here's a tutorial on transformer design.
    A shot from the hip: 20kHz is still too low a frequency to keep the core from saturating. On the other hand, 20kHz is a bit on the high side for a conventional metal core. You can either use a bigger core or a higher frequency (if you can).

    You may try this software (free demo available)
     
    Last edited: Apr 8, 2013
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