DC motor testing

[Wedoca]

Question!! I got a DC motor that has quit on me ....I meggered it ...

+ to G is 430M ohms
- to G is 2M ohms
+ to - is 350M ohms

doesn't seems right to me, am I doing it wrong ??? is there a difference on testing AC and DC motors??

 

[Zogzog]

You sure about those numbers? What are the motor ratings? What voltage did you test at? What was your PI? What was winding temp at time of test?

 

[GTstartup]

looks like an open winding

 

[Wedoca]

Motor infor:

1/4 HP
12VDC
2600RPM
Tested at 250V
I did not do the PI,
the testing enviorment temperture I would say it was about 95 degree F

 

[roydm]

Perhaps the brushes are worn out?

 

[waross]

350 MegOhms from + to - looks like an open. Second to roydm, check the brushes.

Bill
--------------------
"Why not the best?"
Jimmy Carter