Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

DC motor help

Status
Not open for further replies.

Itsbroken

Aerospace
Joined
Mar 13, 2015
Messages
2
Location
AU
Gday all,

I'm in need of some advice/assisstance with a DC motor.

In particular is the Heater Fan/blower Motor from a D22 Nissan Navara (australian)

One day the motor stopped spinning, so I got to exploring and pull it apart. It seems not many forums and internet users have pulled one appart, so I knew I was heading into a sort of unknown territory. When I finally got to the carbon brushes i notice they were worn, so I got to changing them which was a hassel. The ones I recieved were wrong sizes so i simple "filed" them down to the correct width and height, however I am still unsure of length.

When i reassembled the motor, it would not turn still. I am getting 12v power through the brushed and onto the communicator (test volts with a multimeter). I can spin it easily by hand. But when I spin it with power on, once every full rotation I get a spark around the bush below the commmunicator.

Would the length of the brushes effect the motor to turn (as i think they maybe too long causing excessive pressure on the communicator)?
Any other hints or advice would be welcomed.
 
Throw away. Get a new one.

There is most probably a break in the armature winding. Brush length is not critical as long as they do contact the commutator surface - don't use "communicator" - that's something entirely different.

Gunnar Englund
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
 
Hi,
Thanks for the resopnses. I had autocorrect on and the damm thing changed it to communicator.
Stupid smart devices!
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top