How Does Coil Configuration Affect Inductance and Coupling in Magnetic Circuits?

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Discussion Overview

The discussion revolves around the effects of coil configuration on inductance and coupling in magnetic circuits, specifically focusing on scenarios involving parallel and series connections of magnetically coupled coils. The context includes theoretical and homework-related aspects of inductance calculations and magnetic circuit analysis.

Discussion Character

  • Homework-related, Technical explanation

Main Points Raised

  • One participant presents a problem involving two magnetically coupled coils, asking how the coefficient of coupling would change if the coils are connected in series, given that mutual inductance remains constant.
  • The same participant also poses a question about calculating the number of turns in a winding based on given flux density and current, indicating a need for assistance in solving these problems.
  • Another participant emphasizes the importance of posting one's own attempts or solutions in accordance with forum guidelines, suggesting that this practice is beneficial for the discussion.
  • A further reply reminds the original poster about the guidelines related to schoolwork, indicating a community norm regarding the sharing of solutions.
  • The original poster acknowledges the feedback and expresses intent to share their solution in future posts, citing time constraints due to exams.

Areas of Agreement / Disagreement

There is no consensus on the solutions to the posed problems, as participants have not yet engaged in detailed technical discussion or provided solutions. The conversation reflects a mix of requests for help and reminders about forum etiquette.

Contextual Notes

The discussion lacks specific numerical methods or formulas for solving the inductance and winding questions, and assumptions regarding the parameters involved are not fully articulated.

rockerboi
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I'm not sure if my answer is correct, I need someone to help me solve this so I could check my answer..

1.) 2 coils A and B are magnetically coupled. When connected in parallel-aiding, the total inductance is 2.33 H, and when connected in parallel-opposing the total inductance is 1.4H. The mutual inductance is 1H. What will happen to the coefficient of coupling if the 2 coils were connected in a series assuming that the mutual inductance remains the same?

2.) The flux density in the 0.2" air gap of an electric motor is 42,000 maxwells per sq. in. If the mmf required to produce this flux is 82% of the total mmf developed by the exciting coil, calculate the number of turns in the winding,assuming a current of 2.2 A.

Thanks guys!
 
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As per usual protocol, I guess it would be proper for you to post your own attempts or solutions >_>. Not my rules, but I see good reason for them.
 
rocker, if you're not aware of the guidelines regarding schoolwork, please click my signature line.
 
ok! i'll send my solution next time coz I'm in a hurry..i've got so many exams
 

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