0
$\begingroup$

now I'm working on a project which involves a dc motor and high voltage. I'm developing a machine consists of a motor to rotate a platform disc and high voltage will be applied during the rotation. The problem is when I supply a positive high voltage at motor shaft during rotation, the motor stop working. Do you guys have any idea, how I can supply the high voltage properly the high voltage supply?enter image description here

$\endgroup$
3
  • $\begingroup$ Of course it stops working! Do you supply the positive voltage to the other end of needle to spray something? $\endgroup$ Sep 7 '18 at 9:05
  • $\begingroup$ If you have collected magnetic charge, you win the Nobel Prize for the first magnetic monopoles! $\endgroup$ Sep 7 '18 at 18:19
  • $\begingroup$ @SamFarjamirad, yes I supply the positive high voltage to the end of needle to spray polymer solution. why is its stop working? can you explain to me. $\endgroup$
    – norul
    Sep 9 '18 at 8:22
3
$\begingroup$

Don't apply the high voltage to the motor shaft, isolate the disc and only apply the high voltage to that.

Edit based on comments:

isolate ie insulate, electrically separate the disc from the motor shaft while keeping the mechanical drive to make it rotate. Slip rings can be used to apply the voltage to the, now insulated, disc.

See here for an explanation of slip rings: https://en.wikipedia.org/wiki/Slip_ring

$\endgroup$
11
  • $\begingroup$ or slip ring... $\endgroup$ Sep 7 '18 at 11:37
  • $\begingroup$ hi, what do you mean by isolate the disc? $\endgroup$
    – norul
    Sep 9 '18 at 8:24
  • $\begingroup$ @SamFarjamirad what do you mean slip ring? thank you $\endgroup$
    – norul
    Sep 9 '18 at 8:26
  • $\begingroup$ @norul isolate ie insulate, electrically separate the disc from the motor shaft while keeping the mechanical drive to make it rotate. $\endgroup$
    – Solar Mike
    Sep 9 '18 at 8:38
  • $\begingroup$ @norul why it stops working, it's the very basics of electrometers, and i can't explain it here in comments. You can google the term 'slip ring', then you'll find a tons of videos and articles. $\endgroup$ Sep 9 '18 at 8:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.