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Generator / induction formulas help

  1. Nov 23, 2014 #1
    Hi , before I ask I want to say that I have done my “ homework” I did a search on this forums and I found a few hits but I couldn’t quite understand them or the numbers turned out wrong after I did my calculations. So I wanted to make a fresh thread , hope you folks will guide me , thanks.

    So I have a set of coils and a faraday disc inbetween them , the disc is mounted on a rotor axis at both ends , so are the coils which are stationary , then the two faraday discs are connected with a wire which in the middle makes several turns on a pole attached to the rotor.In other words the two disc are connected with a conductor which makes a few turn solenoid in the middle and all of this is mounted on a rotor. Around the rotor is a stationary stator with some coils on it either made of enamel wire or copper foil depending on the design.
    The stator coil is connected with a capacitor to the exciter coils for the faraday disc so that I get ac induction.

    So here is what I can’t calculate on my own , a formula with some explanation would be great.

    I want to calculate the current and voltage induced in the disc at both ends depending on the frequency and field strength of the exciter coils.
    Then I want to calculate the b field strength in the rotor poles when I will know how much current the faraday discs can supply at both ends.
    And I guess the same for the final output coils mounted on the stator which would see the rotating b field of the rotor poles and armature which in fact would be created from the disc at each end of the rotor.

    If you need any extra info to help me out or a drawing please ask.
    Thank you.
  2. jcsd
  3. Nov 23, 2014 #2
    Such problems are best to attack with softwares for electromagnetic field simulation
  4. Nov 25, 2014 #3
    Any more help please?
  5. Nov 25, 2014 #4


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    Gold Member

    I think an electromagnetic solver is your best hope. If you plan to do a lot of this sort of thing, it is worth investing the time to learn the tools.

    Otherwise, you probably need to build a prototype and make measurements.


    With a physical drawing, someone may be able to help a bit more (but not me).
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