Vinyl Asylum: Actually, the SDS is not about frequency control at all... by Ray-o-Stat Welcome Licorice Pizza (LP) lovers! Setup guides and Vinyl FAQ.

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Posted by Ray-o-Stat (R ) on February 24, 2007 at 22:55:55

In Reply to: VPI Industries SDS Accessory posted by hahax@verizon.net on February 24, 2007 at 20:11:32:

this is a common misunderstanding.

The SDS is a generator that has variable voltage and frequency. This allows AC syncronous motors to be run at speed at lower voltages than 120v by altering the voltage frequency to compensate. The rationale being that AC motors run queter and with far less vibration at lower voltages.
A TNT motor can run at reliably at speed with a 72 volt@53Hz feed from the SDS.

Cheers,

Me, I'm just a lawnmower, you can tell me by the way I walk....

-Ray

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