Square Bobbin for Inductors???

r_s_dhar · 31st May 2003, 10:19 AM

Square Bobbin?

Most freewares calculating inductance assume round bobbin/former. Are there any programmes that would do the calculation for a square bobbin (user fed parameter for the sides of the square bobbin)?

Please let me know.

ThomasLMcLean · 31st May 2003, 06:09 PM

I believe that coils with the same cross sectional area will give close to the same results. Calculate a circle that has the same area as the square you intended to use and use it in your calculations. Please understand that there are many factors that effect the inductance value of a coil or toroid and the finished inductor will be slightly different then the calculation. Coils can be "pruned" after they are finished. That is, the turns can be spread out or moved closer. inductors are often made with some extra turns that are removed to achieved the finished value.

31st May 2003, 10:19 AM	#1
r_s_dhar diyAudio Member Join Date: Jun 2002 Location: Mangalore, Karnataka State, India	Square Bobbin for Inductors??? Square Bobbin? Most freewares calculating inductance assume round bobbin/former. Are there any programmes that would do the calculation for a square bobbin (user fed parameter for the sides of the square bobbin)? Please let me know.

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31st May 2003, 06:09 PM	#2
ThomasLMcLean diyAudio Member Join Date: Feb 2003 Location: Slightly North of Portland	I believe that coils with the same cross sectional area will give close to the same results. Calculate a circle that has the same area as the square you intended to use and use it in your calculations. Please understand that there are many factors that effect the inductance value of a coil or toroid and the finished inductor will be slightly different then the calculation. Coils can be "pruned" after they are finished. That is, the turns can be spread out or moved closer. inductors are often made with some extra turns that are removed to achieved the finished value.

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