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Underhung TC Nomz
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<blockquote data-quote="T3mpest" data-source="post: 8147820" data-attributes="member: 560148"><p>XBL^2 drivers, while technically underhung, behave more like overhung, really they are like a strange hybrid mutant of both, having most of the strengths of both without most the weaknesses. Normally underhung, when the coil begins to leave the gap, it has less motor force as part of it is out of the gap and into the fringe field and BL drops FAST. XBL^2 lowers the motor force at the resting point of the driver, where it would normally be highest, this make the BL start low, go higher as moves away from center, but stil in the gap, then drop again, once it begins to really leave the gap then it drops for the final time, hard and sharply as you'd expect of an underung.. This slight back and forth keeps it within a linear range longer than a traditional design.</p><p></p><p>LMS drivers are overhung, but suffer the same drawbacks as most overhung drivers, which makes them very expensive to do well. (takes ALOT of copper to fix the inductance linearity of a coil that thick.)</p></blockquote><p></p>
[QUOTE="T3mpest, post: 8147820, member: 560148"] XBL^2 drivers, while technically underhung, behave more like overhung, really they are like a strange hybrid mutant of both, having most of the strengths of both without most the weaknesses. Normally underhung, when the coil begins to leave the gap, it has less motor force as part of it is out of the gap and into the fringe field and BL drops FAST. XBL^2 lowers the motor force at the resting point of the driver, where it would normally be highest, this make the BL start low, go higher as moves away from center, but stil in the gap, then drop again, once it begins to really leave the gap then it drops for the final time, hard and sharply as you'd expect of an underung.. This slight back and forth keeps it within a linear range longer than a traditional design. LMS drivers are overhung, but suffer the same drawbacks as most overhung drivers, which makes them very expensive to do well. (takes ALOT of copper to fix the inductance linearity of a coil that thick.) [/QUOTE]
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