Thread: New Product EDF Balancer
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Old Dec 10, 2012, 08:10 PM
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Good vibrations.
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Joined Nov 2012
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The high frequency I saw appeared to be from the motor/switching. The Scorpian on the Ramtec EDF has fairly strong "cogging" effect from the magnetic poles.

I rotated the fan by one revolution and counted 24 clicks. When you look at the signals, the high frequency signal is 24 x RPM. I guess this is from the motor poles. The amplitude from the high frequency signal is high and likely induced by some physical force (EMF?). I'll let the motor experts debate this.

Having said that, I did see electrical noise transmitted down Vortex in the early days. Switch mode power supplies connected to Vortex were terrible and caused me grief. If you see a 50 or 60Hz signal superimposed then you know it's the power supply. I recommend batteries because it is one less thing to worry about.

good luck,

DH
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