Recent content by MadHattah

  1. M

    Transformer: Excitation Frequency and Turns Ratio

    Hey, wow, I thought my posts were just disappearing. Anyway, the transformer we're using is from a car, and is usually operated in the 200 - 1000 Hz range, apparently we are using it from 600 to 1000 Hz not 23 kHz (that's a different unit with a different transformer). It seems to me that the...
  2. M

    Transformer: Excitation Frequency and Turns Ratio

    Excuse me, I should have said inductive reactance. I think I've answered my own question. The reactance of an inductor increases with frequency, so it's the reactance of the primary coil itself that lowers the voltage in, therefore, the voltage out would reduce by the turns ratio. Thanks for...
  3. M

    Transformer: Excitation Frequency and Turns Ratio

    Another transformer question: if I have an oil-filled transformer coil and I calculate the turns ratio with voltage in / voltage out at 60 Hz, why, when I increase the frequency to 23 kHz would the turns ratio appear to change? Is it because of the inductance of the primary coil? My boss'...
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