Login

Search the forums now!

Welcome, Guest. Please login or register.

October 23, 2025, 09:23:44 pm
Pages: [1]   Go Down

Author Topic: split ring commutator  (Read 4022 times)  Share 

0 Members and 1 Guest are viewing this topic.

soopertaco

  • Victorian
  • Trendsetter
  • **
  • Posts: 196
  • Respect: +1
split ring commutator
« on: July 14, 2011, 06:51:42 pm »
0
in simple terms can someone explain how a split ring commutator maintains a one way rotational torque?
thanks
Logged
2010: Business Management [39]
2011: Methods | Specialist Math | Physics | Accounting | English
AIM: [94.8+]
2012: BComm@Unimelb

Lasercookie

  • Honorary Moderator
  • ATAR Notes Legend
  • *******
  • Posts: 3167
  • Respect: +326
Re: split ring commutator
« Reply #1 on: July 14, 2011, 07:36:06 pm »
0
So you have a coil that rotates perpendicular to the magnetic field.

The magnetic field is in one direction and once the coil has turned 180 degrees, the direction of the magnetic field will flip. As such, the coil would just keep oscillating around it's own axis.

To try and get the coil to rotate, you use the split ring commutator. What the commutator does is alternate the direction of the current flowing every half turn, therefore allowing the coil to rotate 360 degrees.


Edit: This is a nice diagram (of a slip ring commutator) I found on google images -


Edit: fixed image
« Last Edit: July 23, 2011, 08:29:02 pm by laseredd »
Logged

soopertaco

  • Victorian
  • Trendsetter
  • **
  • Posts: 196
  • Respect: +1
Re: split ring commutator
« Reply #2 on: July 14, 2011, 08:05:41 pm »
0
even had the GIF too haha nice perfect answer thanks a lot!
Logged
2010: Business Management [39]
2011: Methods | Specialist Math | Physics | Accounting | English
AIM: [94.8+]
2012: BComm@Unimelb

golden

  • Victorian
  • Part of the furniture
  • *****
  • Posts: 1065
  • Sharpshot
  • Respect: +102
  • School: VSC
  • School Grad Year: 2011
Re: split ring commutator
« Reply #3 on: July 23, 2011, 07:57:06 pm »
0
Does it alternate the current every half a turn by touching different carbon brushes?
Logged
2014: Microbiology/Immunology Major.

Thanks to (alphabetical order):
2010: appianway. 2011: Kamil9876, laseredd, xZero. 2012: dc302, harper, marr.
Multiple times: pi, Russ, stonecold, TT.

pi

  • Honorary Moderator
  • Great Wonder of ATAR Notes
  • *******
  • Posts: 14348
  • Doctor.
  • Respect: +2376
Re: split ring commutator
« Reply #4 on: July 23, 2011, 08:07:03 pm »
0
^^^Isn't that diagram a SLIP ring commutator?
Logged

Lasercookie

  • Honorary Moderator
  • ATAR Notes Legend
  • *******
  • Posts: 3167
  • Respect: +326
Re: split ring commutator
« Reply #5 on: July 23, 2011, 08:18:34 pm »
0
Quote from: Rohitpi on July 23, 2011, 08:07:03 pm
^^^Isn't that diagram a SLIP ring commutator?
Oh yeah, it is too. :facepalm:
At least the concepts for the rotation are pretty similar, main difference comes with how the current is supplied and reversed.

Quote from: golden on July 23, 2011, 07:57:06 pm
Does it alternate the current every half a turn by touching different carbon brushes?
Yes I'm pretty sure that is correct.

Anyway more resources:
http://webs.mn.catholic.edu.au/physics/emery/hsc_motors.htm#dcmotor
and http://www.gcsescience.com/pme13.htm
These sites explain it pretty well.

And this one has an animation:
http://www.walter-fendt.de/ph14e/electricmotor.htm
Logged
Pages: [1]   Go Up