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Thread: Ideal Inductor in AC=>some doubts

  1. #1 Ideal Inductor in AC=>some doubts 
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    Hello!


    I was studying eletric engineering at high school, and in chapters on AC circuits, we were always taught that when one connects a resistor, a capacitor or an inductor to a AC sine volatege source, the current flowing in each of these elements must be AC, whether they are ideal or real.


    However, on simulation programmes, all these circuits gave an AC current, except for ideal inductor:


    [img]
    [/img]
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    =>According to 2 different simulations softwares, the resulting current flowing in this inductor is as you can see:


    [img][/img]

    Uploaded with ImageShack.us


    It's still sine-shaped for sure! However, don't you notice that signal is never negative? Thus, it's not AC, but has an offset.



    Obviously there is a problem somewhere. Are my lessons wrong?


    thank you


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  3. #2  
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    Either the simulator program is wrong or you are putting the wrong data into it.


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  4. #3  
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    Nov 2008
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    Thank you for your answer.
    I've just changed the signal phase (90 instead of 0), and the current in the pure inductor where, as a result, perfectly AC. :-D

    However, in this new configuration, when i simulate a tank circuit (parallel resonance), the current in the source has an offset or is triangle-shaped.
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