Hello FEMM and COMSOL experts out there.
Anyone here willing and able to do a basic sim about the properties/BL behaviour of the Purify 6.5 midwoofer's alternating 3/4 layer voicecoil?
According to Lars Risbo, designer of the Purify 6.5 Woofer:
the winding has 4 layers but with typically 2 to 4 gaps where the coil is effectively only 3 layers. These gaps flatten the Bl(x) by reducing Bl around the rest position. This trades some sensitivity for much better linearity (the reduced mass due to the gaps compensate to some degree). the positions and widths of the gaps are found using computer optimisation of a finite element model. I hope that explains it better.
Anyone here willing and able to do a basic sim about the properties/BL behaviour of the Purify 6.5 midwoofer's alternating 3/4 layer voicecoil?
According to Lars Risbo, designer of the Purify 6.5 Woofer:
the winding has 4 layers but with typically 2 to 4 gaps where the coil is effectively only 3 layers. These gaps flatten the Bl(x) by reducing Bl around the rest position. This trades some sensitivity for much better linearity (the reduced mass due to the gaps compensate to some degree). the positions and widths of the gaps are found using computer optimisation of a finite element model. I hope that explains it better.
