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resistor in series with inductor...

  • 12-01-2009 2:54pm
    #1
    x in the city
    Closed Accounts Posts: 7,134 ✭✭✭


    Hi Lads,

    Sorry for this n0b question but I am rusty on these things.

    what sort of DC diagram (Time vs Current/Voltage) would you get for a resistor in series (or parallel) with an inductor connected to a dc source?


Comments

  • #2
    DublinDilbert
    Registered Users, Registered Users 2 Posts: 5,401 ✭✭✭DublinDilbert


    Some of the guys here or over on the Electrical forum use multisim (a free simulator ) tool, it would be perfect for figuring out stuff like this. Also you can extract voltage / current wave forms ect from it....

    Well the inductor is going to do everything it can to resist a change in the current flowing in it. So based on that you should be able to figure out what size the current should be at power on...


    http://www.edn.com/article/CA6477513.html
    http://www.analog.com/en/design-tools/dt-multisim-spice-program-download/design-center/index.html?ref=ASC1285


  • #3
    fishdog
    Closed Accounts Posts: 1,113 ✭✭✭fishdog


    what sort of DC diagram (Time vs Current/Voltage) would you get for a resistor in series (or parallel) with an inductor connected to a dc source?
    The current through the RL series would start at 0 and rise to a final value = V/R

    If you were to graph this it against time you would see that it is an exponential growth curve. After 5 time constants it is said to reach steady state. A time constant = L/R seconds.


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