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Message No. 9152, Started by indy0t4 on 05/09/02
AC synchronous motor that has to spin at 50-60 RPM, mounted horizontally with a plastic disc attached.  The disc is 7" in radius, with a uniform weight of 0.256 lb, and is mounted approx. 0.75" along the shaft.  This motor has to run continuously for 2 years...

What starting torque will I need to get this disc moving?  Any help with formulas, or calculations would be greatly appreciated.
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Follow-up Messages (14)

No. 9836, Posted by nohavecd on 10/09/02, 23:00 PST.
If I understand this correctly, once the disk is up to speed, there is no e...
No. 9266, Posted by Joe Boggs on 05/28/02, 08:43 PST.
When I said 50-60 RPM range, I meant that whatever RPM I end up with, must ...
No. 9241, Posted by indy0t4 on 05/22/02, 07:24 PST.
In your original message you gave a range of 50 to 60 RPM. That kind of no...
No. 9238, Posted by rolschwarz on 05/22/02, 06:01 PST.
The reason the motor must be synchronous is that the disc must rotate at a ...
No. 9235, Posted by indy0t4 on 05/21/02, 14:21 PST.
Is there any particular reason you need to use a synchronous motor? An ind...
No. 9234, Posted by rolschwarz on 05/21/02, 13:44 PST.
Some other thoughts - You may need to increase your torque required to a...
No. 9195, Posted by neil moran on 05/15/02, 12:52 PST.
Thanks Neil. But read on... Here's the funny thing: I performed simila...
No. 9182, Posted by indy0t4 on 05/13/02, 17:08 PST.
Hi Indy0t4, You need to work out the total moment of inertia of the 'sys...
No. 9180, Posted by neil moran on 05/13/02, 12:49 PST.
ok, so if I understand it correctly you have a washer pushing against the m...
No. 9176, Posted by rorschach on 05/13/02, 06:08 PST.
Let me give you as much info as I can: There are no other supports for t...
No. 9173, Posted by indy0t4 on 05/12/02, 20:39 PST.
the sad answer is "need more input". is the disk directly coupled to the mo...
No. 9171, Posted by rorschach on 05/12/02, 19:38 PST.
The disc is a plastic, polarized disc that creates motion effects. It runs...
No. 9159, Posted by indy0t4 on 05/10/02, 08:24 PST.
Theoretically, any starting torque greater than zero will get you up to spe...
No. 9158, Posted by rolschwarz on 05/10/02, 07:26 PST.
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