The discussion centers on the design and optimization of field coil loudspeakers using soft magnetic materials, specifically the FeCo alloy, which can exceed 2T in flux density. Participants emphasize the importance of minimizing air gaps in the magnetic circuit to enhance efficiency and reduce current requirements. They also reference historical patents, such as US 1,448,279 and US 1,811,367, which highlight the significance of magnetic flux density and voice coil centering. The conversation concludes with considerations about material costs, copper usage, and the potential for oxidation when combining different metals in the magnetic circuit.
PREREQUISITESAudio engineers, loudspeaker designers, and hobbyists interested in optimizing loudspeaker performance through advanced magnetic materials and circuit design.
Can you use the "Attach files" link below the Edit window to upload a diagram of this arrangement? How can you have a voicecoil on a toroid? Thanks.arivel said:I realize that there are many questions to answer and therefore I don't expect to get all the answers but I would like to get the answer to just one question, I don't think I'm asking too much.
what happens if I put two metals with different magnetic saturation but different or equal magnetic permeability in contact?
the metal with higher magnetic saturation is used to generate the magnetic field through the copper coil while the second metal with lower magnetic saturation is used to channel and close the flux of the magnetic field in a toroidal ring so as not to disperse it in the surrounding space.
I would like to know how the characteristics of the magnetic field that passes through two different metals change.