Dr. D,
The picture on the right has been doctored, as I don't have a disassembled motor handy to take a picture of. It is basically an outrunner brushless motor. the bearings are in the middle.-Andrew
Hi Dr. D,
The rotor itself is a single precision piece with numerous shapes on it, all of them open cylinders in some form or another. You just confirmed a suspicion I had about the solution I arrived at a couple of days ago.
Lets start with the main central cylinder. It is the widest and...
Hi Dr. D,
You are right, a thin ring alone will not have a connection.
The rotor in my particular case is basically a cylinder with the bearing support end being closed in enough to hold the bearing on a shaft, but there is no solid cylinder to speak of. In this case, I had considered using...
Thanks SergioPL & Dr. D. Clearly I missed that one.
https://en.wikipedia.org/wiki/Newton_(unit)
I will post an update to my calculation to make sure the path to my answer is correct.
So please, help me put a bow tie on what I understand then...
The MOI ("I") determines how much mass is...
Hi Dr. D, thanks for the reply!
I am sorry I didn't clarify the shape of the mass and what specific MOI I am calculating (linear vs. angular.) For discussion purposes the shape of the rotor is a perfectly balanced ring (the actual rotor is made of multiple rings on different planes, but that...
Hi all,
I am not a physics major and have spent some time learning via the university of Google. I would really appreciate a second set of eyes on what I am calculating and tell me if I am correct, or if I have done something wrong along the way. I am trying to calculate MOI and need results...