Mutual Inductance (circuit analysis)

Discussion in 'General Electronics Chat' started by full, Sep 12, 2014.

  1. full

    Thread Starter Member

    May 3, 2014
    225
    2
    Hello everyone,

    In this circuit there are two points (Mutual Inductance) ...

    How I know the V1 is negative or positive and the V2 is negative or positive (please explain )?

    mutual.PNG


    This video explain how I Know when mutual is negative or positive .... but the loop I think wrong...:(



    thanks,
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,013
    3,233
    That video is wrong. The red dots on the transformer indicate relative voltage polarity. A positive time-varying voltage applied to the dot input on one side (designated as the primary) will generate a positive voltage at the dot output on the other side (designated as the secondary). That means the current on the input is flowing into the dot (for a positive going signal) at the primary but flowing out (not in as the video seems to state) from the secondary output to the load.
     
    Last edited: Sep 12, 2014
  3. ericgibbs

    AAC Fanatic!

    Jan 29, 2010
    2,503
    380
    hi,
    As Carl states the video is incorrect.
    Perhaps this LTSim will show it more clearly.
    E
     
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