Hi,
I don't know much about the various types of electric motors so just wondering if someone could give me some pointers...
A client asked me to design a simple stirrer (just a motor with a shaft) rotating with adjustable speeds between 50 RPM and 200 RPM. The load is just a tiny steel shaft mixing 500ml of liquids. It can take quite a bit o get up to speed too, that is not a problem.
Efficiency and power dissipation are also not a problem, so linear drive can also be used (I assume that would be less nosy than a PWM drive).
But they need it to be very low emissions (electric, magnetic and electromagnetic) because they have all sorts of sensors around the container which are extremely sensitive to all those emissions.
What type of (low-power) electric motor has the lowest electric, magnetic and electromagnetic emission?
Or, if when decreasing one, another increase (for example by decreasing the magnetic field the electric field increases) then which solution is easier to shield? I think perhaps higher voltage lower current because the electric and electromagnetic fields are easier to shield than the magnetic ones, perhaps?
Any clarifications and pointers are welcome.
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/xsmiley.gif.pagespeed.ic.R8GFI-pF6f.png)
Thank you