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  1. #1
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    can secondary inductance be determined from provided data

    Recently obtained this for its great peak current handling but nothing about secondary inductance.

    https://www.summitracing.com/parts/pnx-d3070

    Code:
    Primary Resistance: 0.350 ohms
    Secondary Resistance: 8.30K ohms
    Inductance (Primary): 2.80 mH
    Turns Ratio: 85:1
    Peak Current: 7.9 amps
    Spark Duration: 1.5 mS
    Going to determine its parasitic capacitance with ordinary phase relations for yielding some accuracy to simulation with this transformer. However not sure whether supplied data is sufficient for secondary inductance. Perhaps an estimate can be given since its value isn't likely in range of LCR meter it being too large to measure.
    Last edited by Zak28; 17th June 2019 at 05:11.

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  2. #2
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    Re: can secondary inductance be determined from provided data

    Available data is enough to calculate secondary inductance

    Primary inductance: 2.8mH
    Turns ratio: 85:1
    Consider Primary 1 turns and Secondary 85 turns
    AL Value : 2.8mH/1^2=2.8mH
    Secondary inductance : 2.8*85^2 =20230mH

    Hope it will help you


    2 members found this post helpful.

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  3. #3
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    Re: can secondary inductance be determined from provided data

    Secondary has an enormous reactance to its rated 1.5mS period yielding ~4190R.

    However is that impedance only applicable to sustained oscillations or is impulse current at its rated period also impeded?



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  4. #4
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    Re: can secondary inductance be determined from provided data

    Really you should describe the turns ratio as 1:85 i.e. pri to sec ... the sec L is the turns ratio squared times the pri L



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