High speed motor for sinusoidal shaker?
High speed motor for sinusoidal shaker?
(OP)
Hello all,
I am new here and look forward to contributing and learning. I am trying to design a "shaker" with a fixed sinusoidal discplacement (~.02" P-P) with a max freq of around 250 hz (15krpm). I was thinking of using a electric motor with an eccentric crankshaft and some sort of conecting rod to drive my test specimen mounted on linear bearings. I have calculated that my peak torque will be around 2.5 ftlbs, but the duty cycle will be very low. A have a few questions:
Is this a reasonable thing to do? I considered adapting a electrodynamic shaker for my application but I was shocked at how large of a unit I would need.
Any sudgestions on what type of motor or a supplier to investigate. My brief research points me to DC brushless, but it is hard to find appropriate motors that spin to 15k.
any input is appreciated.
Thanks,
Aaron
I am new here and look forward to contributing and learning. I am trying to design a "shaker" with a fixed sinusoidal discplacement (~.02" P-P) with a max freq of around 250 hz (15krpm). I was thinking of using a electric motor with an eccentric crankshaft and some sort of conecting rod to drive my test specimen mounted on linear bearings. I have calculated that my peak torque will be around 2.5 ftlbs, but the duty cycle will be very low. A have a few questions:
Is this a reasonable thing to do? I considered adapting a electrodynamic shaker for my application but I was shocked at how large of a unit I would need.
Any sudgestions on what type of motor or a supplier to investigate. My brief research points me to DC brushless, but it is hard to find appropriate motors that spin to 15k.
any input is appreciated.
Thanks,
Aaron





RE: High speed motor for sinusoidal shaker?
However, I think you'll find that it is a tricky thing to design, could you consider using an eccentric mass instead?
Cheers
Greg Locock
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RE: High speed motor for sinusoidal shaker?
BK
RE: High speed motor for sinusoidal shaker?
It has 3 hookups and is "sensorless". I am having dificulty figuring out the industrial jargon to find the appropriate drive controller.
Thanks fof the responces thus far,
Aaron
RE: High speed motor for sinusoidal shaker?
You might want to look at universal motors for the high speed. But I'm not sure they're available at 7 HP either.
RE: High speed motor for sinusoidal shaker?
http://www.astroflight.com/store/pdffiles/3220.pdf
Anybody know a convenient way to power this guy? 7 hp at 4 lbs is quite impressive, but I know these motors can have huge power densities.
RE: High speed motor for sinusoidal shaker?
The torque I mentioned is peak so I think a flywheel is a good thought. The Idea of alot of inertia spinning at 15k scares and excites me at the same time!
Thanks,
Aaron
RE: High speed motor for sinusoidal shaker?
http://www
I'm not sure that link will work (it looks funny). If not go to Microchip.com and go to Design..app notes...motor control....
The guys in the "Electric Motors & Motor Controls Engineering" forum might be able to help you pick out a drive.
RE: High speed motor for sinusoidal shaker?
Brushless motors for 15 KRPM should not be a problem for smaller HP.
RE: High speed motor for sinusoidal shaker?
RE: High speed motor for sinusoidal shaker?
RE: High speed motor for sinusoidal shaker?