- #1
Dans250cortina
- 4
- 0
Hi everyone,
just found these forums and had a look around, there's some great info here!
I usually deal with the run-of-the-mill industrial three phase motors so this is not my strong suit so please bear with me here.
I have a large DC motor here that was brand new but failed after about 2 minutes of run time, manufacturer sent a new one down and told me to scrap the old unit, so i thought I'd take the opportunity to pop it open and see what went wrong, typical burnt out windings but this only raised further questions.
It's a 180VDC 18.5hp motor, commutated with two brushes at 180deg appart, so far pretty standard.
but the damage is what's made me scratch my head a bit. only two sections of the commutator and that portion of the windings is burnt, but the separation of those two sections is only 90 deg apart.
I'm not expecting to fix it or anything, just hoping someone may help me understand how/why
thanks in advance for any input
just found these forums and had a look around, there's some great info here!
I usually deal with the run-of-the-mill industrial three phase motors so this is not my strong suit so please bear with me here.
I have a large DC motor here that was brand new but failed after about 2 minutes of run time, manufacturer sent a new one down and told me to scrap the old unit, so i thought I'd take the opportunity to pop it open and see what went wrong, typical burnt out windings but this only raised further questions.
It's a 180VDC 18.5hp motor, commutated with two brushes at 180deg appart, so far pretty standard.
but the damage is what's made me scratch my head a bit. only two sections of the commutator and that portion of the windings is burnt, but the separation of those two sections is only 90 deg apart.
I'm not expecting to fix it or anything, just hoping someone may help me understand how/why
thanks in advance for any input