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In Reply to: RE: very interesting posted by user510 on January 14, 2017 at 09:56:59:
Hi Steve,To be honest, I know very little about electric motors. All I can tell you is that this motor is quite substantial. It spins up my Sota's 15-lb platter in just a few seconds. Sota's platter has a fairly high moment-of-inertia because much of its mass is concentrated in a lead ring around it periphery.
The motor is a 12-watt brush-less DC motor operating from 24-VAC 3-phase sinusoidal power, which eliminates cogging completely. It has approximately twice the torque of a 10-watt Hurst AC synchronous motor and its RPM is governed by frequency. The Condor controller has a soft start function that ramps up frequency to full speed in about 2-seconds. As a result, there is absolutely no noise at startup and also no noise when running at full speed. After reaching full speed the Condor reduces voltage slightly for quieter operation, if that's even possible since it's totally silent to begin with. I get stable readings from the RoadRunner in about 12-seconds after startup, but I think the RoadRunner takes about that long to stabilize as a result of its averaging algorithm. This 3-phase system is designed to operate turntables with massive platters and it works exceptionally well with my Sota Millennia Vacuum turntable.
Best regards,
John Elison
Edits: 01/14/17
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Follow Ups
- RE: very interesting - John Elison 11:53:31 01/14/17 (5)
- RE: I'll bet... - user510 12:10:50 01/14/17 (4)
- RE: I'll bet... - John Elison 08:31:54 01/16/17 (3)
- RE: that makes my little brain hurt..... - user510 15:21:03 01/16/17 (2)
- RE: that makes my little brain hurt..... - John Elison 15:36:34 01/16/17 (1)
- RE: starting to make sense... - user510 15:40:32 01/16/17 (0)