Member
Joined 2003
Member
Joined 2003
I searched "how do shorting rings work" and found this reference:
http://www.diy-audio.narod.ru/litr/FaradayRingsVoiceCoilImpedance.pdf
http://www.diy-audio.narod.ru/litr/FaradayRingsVoiceCoilImpedance.pdf
Thanks, I did find that 'narod.ru' article too.
So far all the implementations I have seen use shorting rings above and below the air gap. I think they are purely to short the eddy currents generated by the VC that is outside the air gap. I always thought that would be only for overhung designs, but I suppose even the VC of an underhung design can move outside the air-gap at higher excursions such as in LF drivers. So perhaps that is why we see them in underhung woofers.
I have not seen any IRL implementations of shorting rings / sleeves inside the air gap. For example any midrange drivers where the excursion is always minimal that use shorting rings?
EDIT: Zaphs site says the Adire Extremis 6.8 uses a shorting sleeve right through the motor. Ooh pictures here! https://aranmaracoustics.com.au/extremis.html
So far all the implementations I have seen use shorting rings above and below the air gap. I think they are purely to short the eddy currents generated by the VC that is outside the air gap. I always thought that would be only for overhung designs, but I suppose even the VC of an underhung design can move outside the air-gap at higher excursions such as in LF drivers. So perhaps that is why we see them in underhung woofers.
I have not seen any IRL implementations of shorting rings / sleeves inside the air gap. For example any midrange drivers where the excursion is always minimal that use shorting rings?
EDIT: Zaphs site says the Adire Extremis 6.8 uses a shorting sleeve right through the motor. Ooh pictures here! https://aranmaracoustics.com.au/extremis.html
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Inductance management via shorting rings is the same in both overhung and underhung motors. There are plenty of overhung motors that have shorting rings through the gap, not just above and below the gap. An overhung motor that has a full pole sleeve has a shorting ring in the gap.
It is very beneficial even in an underhung design. For some data on this, take a peek at my underhung neo radial subwoofer project that employs a full aluminum shorting ring throughout the entire motor: https://www.diymobileaudio.com/threads/aurasound-ns15-ns18.455165/page-4#post-6100900
It is very beneficial even in an underhung design. For some data on this, take a peek at my underhung neo radial subwoofer project that employs a full aluminum shorting ring throughout the entire motor: https://www.diymobileaudio.com/threads/aurasound-ns15-ns18.455165/page-4#post-6100900
Great work, I've been wondering if there were any DIY driver peeps posting somewhere.Inductance management via shorting rings is the same in both overhung and underhung motors. There are plenty of overhung motors that have shorting rings through the gap, not just above and below the gap. An overhung motor that has a full pole sleeve has a shorting ring in the gap.
It is very beneficial even in an underhung design. For some data on this, take a peek at my underhung neo radial subwoofer project that employs a full aluminum shorting ring throughout the entire motor: https://www.diymobileaudio.com/threads/aurasound-ns15-ns18.455165/page-4#post-6100900
OkI thought the rings primary purpose was to short the eddy currents generated by VC windings that are outside of the gap?
Any good reading / watching material on exactly how they function?
Shorting rings are less expensive than one might think.Shorting rings actually do matter in the most meaningful sense, cash flow.
The Faital 5FE100 retails at £21 and the otherwise identical 5FE120 with shorting at £23.
2 pound well spent I say.
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