Type of dc motor
- Thread starter mostafa65
- Start date
rdrast
Lifetime Supporting Member
Yes, it is. Unless it's a permanent magnet motor.
Most likely, it's a bunch of hamsters in a wheel though.
How many hamster power did you say it was?
Most likely, it's a bunch of hamsters in a wheel though.
How many hamster power did you say it was?
Dear Nic00
Normally pipe mills those produces longitudely welded steel tubes .the line has three section forming , Sizing , and Finising . each section has one DC motor . each DC motor drive a set of rollers . the rollers define the shape , nd the size of the tube .
Normally pipe mills those produces longitudely welded steel tubes .the line has three section forming , Sizing , and Finising . each section has one DC motor . each DC motor drive a set of rollers . the rollers define the shape , nd the size of the tube .
Last edited:
leitmotif
Member
Do the motors have nameplates on them?
IF so send pictures and we can tell you then.
A common setup in steel mills with multiple motor rollers was ward leonard where generator output was connected to armature and independent voltage was supplied to shunt field. Motors were often shunt.
Sepex seems to me to be a nebulous term. All it means is the field is supplied from a different power supply. Could be done with series shunt or compound. It could be argued that permanent magnet DC is a sepex (field is independent of line voltage).
Dan Bentler
IF so send pictures and we can tell you then.
A common setup in steel mills with multiple motor rollers was ward leonard where generator output was connected to armature and independent voltage was supplied to shunt field. Motors were often shunt.
Sepex seems to me to be a nebulous term. All it means is the field is supplied from a different power supply. Could be done with series shunt or compound. It could be argued that permanent magnet DC is a sepex (field is independent of line voltage).
Dan Bentler
widelto
Member
I worked for a pipe mill for 15 years and DC motors used overthere were shunt motors, we had a huge M-G set. After 15 years we replaced them with AC vector motors and drives controlled by compactlogix and devicenet.
Clay B.
Lifetime Supporting Member
allscott
Member
- Join Date
- Jul 2004
- Posts
- 1,332
You are still using an MG set?! The pipe company I worked for took the last one of those out of comission 15 years ago.
widelto
Member
Well that just takes all the fun out of it. Don't you like brushes...
yes sir. initially we had problems with brushes on the M-G set, then we need to change speed on some motors, we accomplished that by field weakening but that was a pain in the neck. Finally we replaced all of them.
DickDV
Member
You can pretty well eliminate permanent magnet and series wound motor. That leaves straight shunt, stab shunt and comp shunt.
If the machine ever operates in reverse, that will usually take stab shunt and comp shunt out of the running leaving straight shunt as mentioned above.
It should say on the nameplate tho. Why aren't you reading the nameplate for your answer? Are they gone?
If the machine ever operates in reverse, that will usually take stab shunt and comp shunt out of the running leaving straight shunt as mentioned above.
It should say on the nameplate tho. Why aren't you reading the nameplate for your answer? Are they gone?
How I know the type of DC motor
Dear all
Thank you very much for your replies . the type of motor is written in the nameplate . The nameplate contain data like speed, VA, Ia, VF, If , IP .
my question now is how i can know the type of Dc motor (sunt , series , sperately exited) using multimeter?, if it is possible ?
Dear all
Thank you very much for your replies . the type of motor is written in the nameplate . The nameplate contain data like speed, VA, Ia, VF, If , IP .
my question now is how i can know the type of Dc motor (sunt , series , sperately exited) using multimeter?, if it is possible ?
shoelesscraig
Member
The most common ones are 1/2 to 10 Hampster power, but we do have one machine that has a 150 on it....you have to keep the wheel inside greased really well or they start slowing down.
Dear all
i think all are wondering about my DC motors those still working until now . I said yes , the motors are still working in a good conditions , why I go to upgrade , I think they could work at least for the next five years .
thank you for all of you
i think all are wondering about my DC motors those still working until now . I said yes , the motors are still working in a good conditions , why I go to upgrade , I think they could work at least for the next five years .
thank you for all of you
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